{
  "version": 3,
  "sources": ["../../node_modules/.pnpm/inherits@2.0.4/node_modules/inherits/inherits_browser.js", "../../node_modules/.pnpm/events@1.1.1/node_modules/events/events.js", "../../node_modules/.pnpm/right-now@1.0.0/node_modules/right-now/browser.js", "../../node_modules/.pnpm/performance-now@2.1.0/node_modules/performance-now/lib/src/performance-now.coffee", "../../node_modules/.pnpm/raf@3.4.1/node_modules/raf/index.js", "../../node_modules/.pnpm/raf-loop@1.1.3/node_modules/raf-loop/index.js", "../../node_modules/.pnpm/dct@0.1.0/node_modules/dct/src/dct.js", "../../node_modules/.pnpm/dct@0.1.0/node_modules/dct/index.js", "../../node_modules/.pnpm/fftjs@0.0.4/node_modules/fftjs/dist/utils.js", "../../node_modules/.pnpm/fftjs@0.0.4/node_modules/fftjs/dist/fft.js", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/meyda/node_modules/tslib/tslib.es6.js", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/windowing.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/utilities.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/extractorUtilities.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/loudness.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/powerSpectrum.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/melBands.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/featureExtractors.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/chroma.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/energy.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/mfcc.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/perceptualSharpness.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/perceptualSpread.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/rms.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/spectralCentroid.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/spectralCrest.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/spectralFlatness.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/spectralFlux.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/spectralKurtosis.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/spectralRolloff.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/spectralSkewness.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/spectralSlope.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/spectralSpread.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/extractors/zcr.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/meyda-wa.ts", "../../node_modules/.pnpm/meyda@5.6.2/node_modules/src/main.ts", "../../node_modules/.pnpm/regl@1.7.0/node_modules/regl/dist/regl.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/output.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/hydra-synth.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/lib/webcam.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/lib/screenmedia.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/hydra-source.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/lib/mouse-event.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/lib/mouse.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/lib/audio.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/lib/video-recorder.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/lib/easing-functions.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/lib/array-utils.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/lib/sandbox.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/eval-sandbox.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/format-arguments.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/generate-glsl.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/glsl/utility-functions.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/glsl-source.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/glsl/glsl-functions.js", "../../node_modules/.pnpm/hydra-synth@1.3.29/node_modules/hydra-synth/src/generator-factory.js", "../../_packs/hydra_index.js"],
  "sourcesContent": ["if (typeof Object.create === 'function') {\n  // implementation from standard node.js 'util' module\n  module.exports = function inherits(ctor, superCtor) {\n    if (superCtor) {\n      ctor.super_ = superCtor\n      ctor.prototype = Object.create(superCtor.prototype, {\n        constructor: {\n          value: ctor,\n          enumerable: false,\n          writable: true,\n          configurable: true\n        }\n      })\n    }\n  };\n} else {\n  // old school shim for old browsers\n  module.exports = function inherits(ctor, superCtor) {\n    if (superCtor) {\n      ctor.super_ = superCtor\n      var TempCtor = function () {}\n      TempCtor.prototype = superCtor.prototype\n      ctor.prototype = new TempCtor()\n      ctor.prototype.constructor = ctor\n    }\n  }\n}\n", "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\nfunction EventEmitter() {\n  this._events = this._events || {};\n  this._maxListeners = this._maxListeners || undefined;\n}\nmodule.exports = EventEmitter;\n\n// Backwards-compat with node 0.10.x\nEventEmitter.EventEmitter = EventEmitter;\n\nEventEmitter.prototype._events = undefined;\nEventEmitter.prototype._maxListeners = undefined;\n\n// By default EventEmitters will print a warning if more than 10 listeners are\n// added to it. This is a useful default which helps finding memory leaks.\nEventEmitter.defaultMaxListeners = 10;\n\n// Obviously not all Emitters should be limited to 10. This function allows\n// that to be increased. Set to zero for unlimited.\nEventEmitter.prototype.setMaxListeners = function(n) {\n  if (!isNumber(n) || n < 0 || isNaN(n))\n    throw TypeError('n must be a positive number');\n  this._maxListeners = n;\n  return this;\n};\n\nEventEmitter.prototype.emit = function(type) {\n  var er, handler, len, args, i, listeners;\n\n  if (!this._events)\n    this._events = {};\n\n  // If there is no 'error' event listener then throw.\n  if (type === 'error') {\n    if (!this._events.error ||\n        (isObject(this._events.error) && !this._events.error.length)) {\n      er = arguments[1];\n      if (er instanceof Error) {\n        throw er; // Unhandled 'error' event\n      } else {\n        // At least give some kind of context to the user\n        var err = new Error('Uncaught, unspecified \"error\" event. (' + er + ')');\n        err.context = er;\n        throw err;\n      }\n    }\n  }\n\n  handler = this._events[type];\n\n  if (isUndefined(handler))\n    return false;\n\n  if (isFunction(handler)) {\n    switch (arguments.length) {\n      // fast cases\n      case 1:\n        handler.call(this);\n        break;\n      case 2:\n        handler.call(this, arguments[1]);\n        break;\n      case 3:\n        handler.call(this, arguments[1], arguments[2]);\n        break;\n      // slower\n      default:\n        args = Array.prototype.slice.call(arguments, 1);\n        handler.apply(this, args);\n    }\n  } else if (isObject(handler)) {\n    args = Array.prototype.slice.call(arguments, 1);\n    listeners = handler.slice();\n    len = listeners.length;\n    for (i = 0; i < len; i++)\n      listeners[i].apply(this, args);\n  }\n\n  return true;\n};\n\nEventEmitter.prototype.addListener = function(type, listener) {\n  var m;\n\n  if (!isFunction(listener))\n    throw TypeError('listener must be a function');\n\n  if (!this._events)\n    this._events = {};\n\n  // To avoid recursion in the case that type === \"newListener\"! Before\n  // adding it to the listeners, first emit \"newListener\".\n  if (this._events.newListener)\n    this.emit('newListener', type,\n              isFunction(listener.listener) ?\n              listener.listener : listener);\n\n  if (!this._events[type])\n    // Optimize the case of one listener. Don't need the extra array object.\n    this._events[type] = listener;\n  else if (isObject(this._events[type]))\n    // If we've already got an array, just append.\n    this._events[type].push(listener);\n  else\n    // Adding the second element, need to change to array.\n    this._events[type] = [this._events[type], listener];\n\n  // Check for listener leak\n  if (isObject(this._events[type]) && !this._events[type].warned) {\n    if (!isUndefined(this._maxListeners)) {\n      m = this._maxListeners;\n    } else {\n      m = EventEmitter.defaultMaxListeners;\n    }\n\n    if (m && m > 0 && this._events[type].length > m) {\n      this._events[type].warned = true;\n      console.error('(node) warning: possible EventEmitter memory ' +\n                    'leak detected. %d listeners added. ' +\n                    'Use emitter.setMaxListeners() to increase limit.',\n                    this._events[type].length);\n      if (typeof console.trace === 'function') {\n        // not supported in IE 10\n        console.trace();\n      }\n    }\n  }\n\n  return this;\n};\n\nEventEmitter.prototype.on = EventEmitter.prototype.addListener;\n\nEventEmitter.prototype.once = function(type, listener) {\n  if (!isFunction(listener))\n    throw TypeError('listener must be a function');\n\n  var fired = false;\n\n  function g() {\n    this.removeListener(type, g);\n\n    if (!fired) {\n      fired = true;\n      listener.apply(this, arguments);\n    }\n  }\n\n  g.listener = listener;\n  this.on(type, g);\n\n  return this;\n};\n\n// emits a 'removeListener' event iff the listener was removed\nEventEmitter.prototype.removeListener = function(type, listener) {\n  var list, position, length, i;\n\n  if (!isFunction(listener))\n    throw TypeError('listener must be a function');\n\n  if (!this._events || !this._events[type])\n    return this;\n\n  list = this._events[type];\n  length = list.length;\n  position = -1;\n\n  if (list === listener ||\n      (isFunction(list.listener) && list.listener === listener)) {\n    delete this._events[type];\n    if (this._events.removeListener)\n      this.emit('removeListener', type, listener);\n\n  } else if (isObject(list)) {\n    for (i = length; i-- > 0;) {\n      if (list[i] === listener ||\n          (list[i].listener && list[i].listener === listener)) {\n        position = i;\n        break;\n      }\n    }\n\n    if (position < 0)\n      return this;\n\n    if (list.length === 1) {\n      list.length = 0;\n      delete this._events[type];\n    } else {\n      list.splice(position, 1);\n    }\n\n    if (this._events.removeListener)\n      this.emit('removeListener', type, listener);\n  }\n\n  return this;\n};\n\nEventEmitter.prototype.removeAllListeners = function(type) {\n  var key, listeners;\n\n  if (!this._events)\n    return this;\n\n  // not listening for removeListener, no need to emit\n  if (!this._events.removeListener) {\n    if (arguments.length === 0)\n      this._events = {};\n    else if (this._events[type])\n      delete this._events[type];\n    return this;\n  }\n\n  // emit removeListener for all listeners on all events\n  if (arguments.length === 0) {\n    for (key in this._events) {\n      if (key === 'removeListener') continue;\n      this.removeAllListeners(key);\n    }\n    this.removeAllListeners('removeListener');\n    this._events = {};\n    return this;\n  }\n\n  listeners = this._events[type];\n\n  if (isFunction(listeners)) {\n    this.removeListener(type, listeners);\n  } else if (listeners) {\n    // LIFO order\n    while (listeners.length)\n      this.removeListener(type, listeners[listeners.length - 1]);\n  }\n  delete this._events[type];\n\n  return this;\n};\n\nEventEmitter.prototype.listeners = function(type) {\n  var ret;\n  if (!this._events || !this._events[type])\n    ret = [];\n  else if (isFunction(this._events[type]))\n    ret = [this._events[type]];\n  else\n    ret = this._events[type].slice();\n  return ret;\n};\n\nEventEmitter.prototype.listenerCount = function(type) {\n  if (this._events) {\n    var evlistener = this._events[type];\n\n    if (isFunction(evlistener))\n      return 1;\n    else if (evlistener)\n      return evlistener.length;\n  }\n  return 0;\n};\n\nEventEmitter.listenerCount = function(emitter, type) {\n  return emitter.listenerCount(type);\n};\n\nfunction isFunction(arg) {\n  return typeof arg === 'function';\n}\n\nfunction isNumber(arg) {\n  return typeof arg === 'number';\n}\n\nfunction isObject(arg) {\n  return typeof arg === 'object' && arg !== null;\n}\n\nfunction isUndefined(arg) {\n  return arg === void 0;\n}\n", "module.exports =\n  global.performance &&\n  global.performance.now ? function now() {\n    return performance.now()\n  } : Date.now || function now() {\n    return +new Date\n  }\n", null, "var now = require('performance-now')\n  , root = typeof window === 'undefined' ? global : window\n  , vendors = ['moz', 'webkit']\n  , suffix = 'AnimationFrame'\n  , raf = root['request' + suffix]\n  , caf = root['cancel' + suffix] || root['cancelRequest' + suffix]\n\nfor(var i = 0; !raf && i < vendors.length; i++) {\n  raf = root[vendors[i] + 'Request' + suffix]\n  caf = root[vendors[i] + 'Cancel' + suffix]\n      || root[vendors[i] + 'CancelRequest' + suffix]\n}\n\n// Some versions of FF have rAF but not cAF\nif(!raf || !caf) {\n  var last = 0\n    , id = 0\n    , queue = []\n    , frameDuration = 1000 / 60\n\n  raf = function(callback) {\n    if(queue.length === 0) {\n      var _now = now()\n        , next = Math.max(0, frameDuration - (_now - last))\n      last = next + _now\n      setTimeout(function() {\n        var cp = queue.slice(0)\n        // Clear queue here to prevent\n        // callbacks from appending listeners\n        // to the current frame's queue\n        queue.length = 0\n        for(var i = 0; i < cp.length; i++) {\n          if(!cp[i].cancelled) {\n            try{\n              cp[i].callback(last)\n            } catch(e) {\n              setTimeout(function() { throw e }, 0)\n            }\n          }\n        }\n      }, Math.round(next))\n    }\n    queue.push({\n      handle: ++id,\n      callback: callback,\n      cancelled: false\n    })\n    return id\n  }\n\n  caf = function(handle) {\n    for(var i = 0; i < queue.length; i++) {\n      if(queue[i].handle === handle) {\n        queue[i].cancelled = true\n      }\n    }\n  }\n}\n\nmodule.exports = function(fn) {\n  // Wrap in a new function to prevent\n  // `cancel` potentially being assigned\n  // to the native rAF function\n  return raf.call(root, fn)\n}\nmodule.exports.cancel = function() {\n  caf.apply(root, arguments)\n}\nmodule.exports.polyfill = function(object) {\n  if (!object) {\n    object = root;\n  }\n  object.requestAnimationFrame = raf\n  object.cancelAnimationFrame = caf\n}\n", "var inherits = require('inherits')\nvar EventEmitter = require('events').EventEmitter\nvar now = require('right-now')\nvar raf = require('raf')\n\nmodule.exports = Engine\nfunction Engine(fn) {\n    if (!(this instanceof Engine)) \n        return new Engine(fn)\n    this.running = false\n    this.last = now()\n    this._frame = 0\n    this._tick = this.tick.bind(this)\n\n    if (fn)\n        this.on('tick', fn)\n}\n\ninherits(Engine, EventEmitter)\n\nEngine.prototype.start = function() {\n    if (this.running) \n        return\n    this.running = true\n    this.last = now()\n    this._frame = raf(this._tick)\n    return this\n}\n\nEngine.prototype.stop = function() {\n    this.running = false\n    if (this._frame !== 0)\n        raf.cancel(this._frame)\n    this._frame = 0\n    return this\n}\n\nEngine.prototype.tick = function() {\n    this._frame = raf(this._tick)\n    var time = now()\n    var dt = time - this.last\n    this.emit('tick', dt)\n    this.last = time\n}", "/*===========================================================================*\\\n * Discrete Cosine Transform\n *\n * (c) Vail Systems. Joshua Jung and Ben Bryan. 2015\n *\n * This code is not designed to be highly optimized but as an educational\n * tool to understand the Mel-scale and its related coefficients used in\n * human speech analysis.\n\\*===========================================================================*/\nvar cosMap = null;\n\n// Builds a cosine map for the given input size. This allows multiple input sizes to be memoized automagically\n// if you want to run the DCT over and over.\nvar memoizeCosines = function(N) {\n  cosMap = cosMap || {};\n  cosMap[N] = new Array(N*N);\n\n  var PI_N = Math.PI / N;\n\n  for (var k = 0; k < N; k++) {\n    for (var n = 0; n < N; n++) {\n      cosMap[N][n + (k * N)] = Math.cos(PI_N * (n + 0.5) * k);\n    }\n  }\n};\n\nfunction dct(signal, scale) {\n  var L = signal.length;\n  scale = scale || 2;\n\n  if (!cosMap || !cosMap[L]) memoizeCosines(L);\n\n  var coefficients = signal.map(function () {return 0;});\n\n  return coefficients.map(function (__, ix) {\n    return scale * signal.reduce(function (prev, cur, ix_, arr) {\n      return prev + (cur * cosMap[L][ix_ + (ix * L)]);\n    }, 0);\n  });\n};\n\nmodule.exports = dct;\n", "module.exports = require('./src/dct.js');\n", "'use strict';\n\n// memoization of the reversal of different lengths.\n\nfunction _toConsumableArray(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); } }\n\nvar memoizedReversal = {};\nvar memoizedZeroBuffers = {};\n\nvar constructComplexArray = function constructComplexArray(signal) {\n  var complexSignal = {};\n\n  complexSignal.real = signal.real === undefined ? signal.slice() : signal.real.slice();\n\n  var bufferSize = complexSignal.real.length;\n\n  if (memoizedZeroBuffers[bufferSize] === undefined) {\n    memoizedZeroBuffers[bufferSize] = Array.apply(null, Array(bufferSize)).map(Number.prototype.valueOf, 0);\n  }\n\n  complexSignal.imag = memoizedZeroBuffers[bufferSize].slice();\n\n  return complexSignal;\n};\n\nvar bitReverseArray = function bitReverseArray(N) {\n  if (memoizedReversal[N] === undefined) {\n    var maxBinaryLength = (N - 1).toString(2).length; //get the binary length of the largest index.\n    var templateBinary = '0'.repeat(maxBinaryLength); //create a template binary of that length.\n    var reversed = {};\n    for (var n = 0; n < N; n++) {\n      var currBinary = n.toString(2); //get binary value of current index.\n\n      //prepend zeros from template to current binary. This makes binary values of all indices have the same length.\n      currBinary = templateBinary.substr(currBinary.length) + currBinary;\n\n      currBinary = [].concat(_toConsumableArray(currBinary)).reverse().join(''); //reverse\n      reversed[n] = parseInt(currBinary, 2); //convert to decimal\n    }\n    memoizedReversal[N] = reversed; //save\n  }\n  return memoizedReversal[N];\n};\n\n// complex multiplication\nvar multiply = function multiply(a, b) {\n  return {\n    'real': a.real * b.real - a.imag * b.imag,\n    'imag': a.real * b.imag + a.imag * b.real\n  };\n};\n\n// complex addition\nvar add = function add(a, b) {\n  return {\n    'real': a.real + b.real,\n    'imag': a.imag + b.imag\n  };\n};\n\n// complex subtraction\nvar subtract = function subtract(a, b) {\n  return {\n    'real': a.real - b.real,\n    'imag': a.imag - b.imag\n  };\n};\n\n// euler's identity e^x = cos(x) + sin(x)\nvar euler = function euler(kn, N) {\n  var x = -2 * Math.PI * kn / N;\n  return { 'real': Math.cos(x), 'imag': Math.sin(x) };\n};\n\n// complex conjugate\nvar conj = function conj(a) {\n  a.imag *= -1;\n  return a;\n};\n\nmodule.exports = {\n  bitReverseArray: bitReverseArray,\n  multiply: multiply,\n  add: add,\n  subtract: subtract,\n  euler: euler,\n  conj: conj,\n  constructComplexArray: constructComplexArray\n};", "'use strict';\n\nvar utils = require('./utils');\n\n// real to complex fft\nvar fft = function fft(signal) {\n\n  var complexSignal = {};\n\n  if (signal.real === undefined || signal.imag === undefined) {\n    complexSignal = utils.constructComplexArray(signal);\n  } else {\n    complexSignal.real = signal.real.slice();\n    complexSignal.imag = signal.imag.slice();\n  }\n\n  var N = complexSignal.real.length;\n  var logN = Math.log2(N);\n\n  if (Math.round(logN) != logN) throw new Error('Input size must be a power of 2.');\n\n  if (complexSignal.real.length != complexSignal.imag.length) {\n    throw new Error('Real and imaginary components must have the same length.');\n  }\n\n  var bitReversedIndices = utils.bitReverseArray(N);\n\n  // sort array\n  var ordered = {\n    'real': [],\n    'imag': []\n  };\n\n  for (var i = 0; i < N; i++) {\n    ordered.real[bitReversedIndices[i]] = complexSignal.real[i];\n    ordered.imag[bitReversedIndices[i]] = complexSignal.imag[i];\n  }\n\n  for (var _i = 0; _i < N; _i++) {\n    complexSignal.real[_i] = ordered.real[_i];\n    complexSignal.imag[_i] = ordered.imag[_i];\n  }\n  // iterate over the number of stages\n  for (var n = 1; n <= logN; n++) {\n    var currN = Math.pow(2, n);\n\n    // find twiddle factors\n    for (var k = 0; k < currN / 2; k++) {\n      var twiddle = utils.euler(k, currN);\n\n      // on each block of FT, implement the butterfly diagram\n      for (var m = 0; m < N / currN; m++) {\n        var currEvenIndex = currN * m + k;\n        var currOddIndex = currN * m + k + currN / 2;\n\n        var currEvenIndexSample = {\n          'real': complexSignal.real[currEvenIndex],\n          'imag': complexSignal.imag[currEvenIndex]\n        };\n        var currOddIndexSample = {\n          'real': complexSignal.real[currOddIndex],\n          'imag': complexSignal.imag[currOddIndex]\n        };\n\n        var odd = utils.multiply(twiddle, currOddIndexSample);\n\n        var subtractionResult = utils.subtract(currEvenIndexSample, odd);\n        complexSignal.real[currOddIndex] = subtractionResult.real;\n        complexSignal.imag[currOddIndex] = subtractionResult.imag;\n\n        var additionResult = utils.add(odd, currEvenIndexSample);\n        complexSignal.real[currEvenIndex] = additionResult.real;\n        complexSignal.imag[currEvenIndex] = additionResult.imag;\n      }\n    }\n  }\n\n  return complexSignal;\n};\n\n// complex to real ifft\nvar ifft = function ifft(signal) {\n\n  if (signal.real === undefined || signal.imag === undefined) {\n    throw new Error(\"IFFT only accepts a complex input.\");\n  }\n\n  var N = signal.real.length;\n\n  var complexSignal = {\n    'real': [],\n    'imag': []\n  };\n\n  //take complex conjugate in order to be able to use the regular FFT for IFFT\n  for (var i = 0; i < N; i++) {\n    var currentSample = {\n      'real': signal.real[i],\n      'imag': signal.imag[i]\n    };\n\n    var conjugateSample = utils.conj(currentSample);\n    complexSignal.real[i] = conjugateSample.real;\n    complexSignal.imag[i] = conjugateSample.imag;\n  }\n\n  //compute\n  var X = fft(complexSignal);\n\n  //normalize\n  complexSignal.real = X.real.map(function (val) {\n    return val / N;\n  });\n\n  complexSignal.imag = X.imag.map(function (val) {\n    return val / N;\n  });\n\n  return complexSignal;\n};\n\nmodule.exports = {\n  fft: fft,\n  ifft: ifft\n};", "/******************************************************************************\r\nCopyright (c) Microsoft Corporation.\r\n\r\nPermission to use, copy, modify, and/or distribute this software for any\r\npurpose with or without fee is hereby granted.\r\n\r\nTHE SOFTWARE IS PROVIDED \"AS IS\" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH\r\nREGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY\r\nAND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,\r\nINDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM\r\nLOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR\r\nOTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR\r\nPERFORMANCE OF THIS SOFTWARE.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = function(d, b) {\r\n    extendStatics = Object.setPrototypeOf ||\r\n        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n        function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\r\n    return extendStatics(d, b);\r\n};\r\n\r\nexport function __extends(d, b) {\r\n    if (typeof b !== \"function\" && b !== null)\r\n        throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\nexport var __assign = function() {\r\n    __assign = Object.assign || function __assign(t) {\r\n        for (var s, i = 1, n = arguments.length; i < n; i++) {\r\n            s = arguments[i];\r\n            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];\r\n        }\r\n        return t;\r\n    }\r\n    return __assign.apply(this, arguments);\r\n}\r\n\r\nexport function __rest(s, e) {\r\n    var t = {};\r\n    for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)\r\n        t[p] = s[p];\r\n    if (s != null && typeof Object.getOwnPropertySymbols === \"function\")\r\n        for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {\r\n            if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))\r\n                t[p[i]] = s[p[i]];\r\n        }\r\n    return t;\r\n}\r\n\r\nexport function __decorate(decorators, target, key, desc) {\r\n    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\r\n    if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\r\n    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\r\n    return c > 3 && r && Object.defineProperty(target, key, r), r;\r\n}\r\n\r\nexport function __param(paramIndex, decorator) {\r\n    return function (target, key) { decorator(target, key, paramIndex); }\r\n}\r\n\r\nexport function __esDecorate(ctor, descriptorIn, decorators, contextIn, initializers, extraInitializers) {\r\n    function accept(f) { if (f !== void 0 && typeof f !== \"function\") throw new TypeError(\"Function expected\"); return f; }\r\n    var kind = contextIn.kind, key = kind === \"getter\" ? \"get\" : kind === \"setter\" ? \"set\" : \"value\";\r\n    var target = !descriptorIn && ctor ? contextIn[\"static\"] ? ctor : ctor.prototype : null;\r\n    var descriptor = descriptorIn || (target ? Object.getOwnPropertyDescriptor(target, contextIn.name) : {});\r\n    var _, done = false;\r\n    for (var i = decorators.length - 1; i >= 0; i--) {\r\n        var context = {};\r\n        for (var p in contextIn) context[p] = p === \"access\" ? {} : contextIn[p];\r\n        for (var p in contextIn.access) context.access[p] = contextIn.access[p];\r\n        context.addInitializer = function (f) { if (done) throw new TypeError(\"Cannot add initializers after decoration has completed\"); extraInitializers.push(accept(f || null)); };\r\n        var result = (0, decorators[i])(kind === \"accessor\" ? { get: descriptor.get, set: descriptor.set } : descriptor[key], context);\r\n        if (kind === \"accessor\") {\r\n            if (result === void 0) continue;\r\n            if (result === null || typeof result !== \"object\") throw new TypeError(\"Object expected\");\r\n            if (_ = accept(result.get)) descriptor.get = _;\r\n            if (_ = accept(result.set)) descriptor.set = _;\r\n            if (_ = accept(result.init)) initializers.unshift(_);\r\n        }\r\n        else if (_ = accept(result)) {\r\n            if (kind === \"field\") initializers.unshift(_);\r\n            else descriptor[key] = _;\r\n        }\r\n    }\r\n    if (target) Object.defineProperty(target, contextIn.name, descriptor);\r\n    done = true;\r\n};\r\n\r\nexport function __runInitializers(thisArg, initializers, value) {\r\n    var useValue = arguments.length > 2;\r\n    for (var i = 0; i < initializers.length; i++) {\r\n        value = useValue ? initializers[i].call(thisArg, value) : initializers[i].call(thisArg);\r\n    }\r\n    return useValue ? value : void 0;\r\n};\r\n\r\nexport function __propKey(x) {\r\n    return typeof x === \"symbol\" ? x : \"\".concat(x);\r\n};\r\n\r\nexport function __setFunctionName(f, name, prefix) {\r\n    if (typeof name === \"symbol\") name = name.description ? \"[\".concat(name.description, \"]\") : \"\";\r\n    return Object.defineProperty(f, \"name\", { configurable: true, value: prefix ? \"\".concat(prefix, \" \", name) : name });\r\n};\r\n\r\nexport function __metadata(metadataKey, metadataValue) {\r\n    if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(metadataKey, metadataValue);\r\n}\r\n\r\nexport function __awaiter(thisArg, _arguments, P, generator) {\r\n    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }\r\n    return new (P || (P = Promise))(function (resolve, reject) {\r\n        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\r\n        function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\r\n        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }\r\n        step((generator = generator.apply(thisArg, _arguments || [])).next());\r\n    });\r\n}\r\n\r\nexport function __generator(thisArg, body) {\r\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n    return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n    function verb(n) { return function (v) { return step([n, v]); }; }\r\n    function step(op) {\r\n        if (f) throw new TypeError(\"Generator is already executing.\");\r\n        while (g && (g = 0, op[0] && (_ = 0)), _) try {\r\n            if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\r\n            if (y = 0, t) op = [op[0] & 2, t.value];\r\n            switch (op[0]) {\r\n                case 0: case 1: t = op; break;\r\n                case 4: _.label++; return { value: op[1], done: false };\r\n                case 5: _.label++; y = op[1]; op = [0]; continue;\r\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n                default:\r\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n                    if (t[2]) _.ops.pop();\r\n                    _.trys.pop(); continue;\r\n            }\r\n            op = body.call(thisArg, _);\r\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n    }\r\n}\r\n\r\nexport var __createBinding = Object.create ? (function(o, m, k, k2) {\r\n    if (k2 === undefined) k2 = k;\r\n    var desc = Object.getOwnPropertyDescriptor(m, k);\r\n    if (!desc || (\"get\" in desc ? !m.__esModule : desc.writable || desc.configurable)) {\r\n        desc = { enumerable: true, get: function() { return m[k]; } };\r\n    }\r\n    Object.defineProperty(o, k2, desc);\r\n}) : (function(o, m, k, k2) {\r\n    if (k2 === undefined) k2 = k;\r\n    o[k2] = m[k];\r\n});\r\n\r\nexport function __exportStar(m, o) {\r\n    for (var p in m) if (p !== \"default\" && !Object.prototype.hasOwnProperty.call(o, p)) __createBinding(o, m, p);\r\n}\r\n\r\nexport function __values(o) {\r\n    var s = typeof Symbol === \"function\" && Symbol.iterator, m = s && o[s], i = 0;\r\n    if (m) return m.call(o);\r\n    if (o && typeof o.length === \"number\") return {\r\n        next: function () {\r\n            if (o && i >= o.length) o = void 0;\r\n            return { value: o && o[i++], done: !o };\r\n        }\r\n    };\r\n    throw new TypeError(s ? \"Object is not iterable.\" : \"Symbol.iterator is not defined.\");\r\n}\r\n\r\nexport function __read(o, n) {\r\n    var m = typeof Symbol === \"function\" && o[Symbol.iterator];\r\n    if (!m) return o;\r\n    var i = m.call(o), r, ar = [], e;\r\n    try {\r\n        while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\r\n    }\r\n    catch (error) { e = { error: error }; }\r\n    finally {\r\n        try {\r\n            if (r && !r.done && (m = i[\"return\"])) m.call(i);\r\n        }\r\n        finally { if (e) throw e.error; }\r\n    }\r\n    return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spread() {\r\n    for (var ar = [], i = 0; i < arguments.length; i++)\r\n        ar = ar.concat(__read(arguments[i]));\r\n    return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spreadArrays() {\r\n    for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;\r\n    for (var r = Array(s), k = 0, i = 0; i < il; i++)\r\n        for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)\r\n            r[k] = a[j];\r\n    return r;\r\n}\r\n\r\nexport function __spreadArray(to, from, pack) {\r\n    if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {\r\n        if (ar || !(i in from)) {\r\n            if (!ar) ar = Array.prototype.slice.call(from, 0, i);\r\n            ar[i] = from[i];\r\n        }\r\n    }\r\n    return to.concat(ar || Array.prototype.slice.call(from));\r\n}\r\n\r\nexport function __await(v) {\r\n    return this instanceof __await ? (this.v = v, this) : new __await(v);\r\n}\r\n\r\nexport function __asyncGenerator(thisArg, _arguments, generator) {\r\n    if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n    var g = generator.apply(thisArg, _arguments || []), i, q = [];\r\n    return i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i;\r\n    function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }\r\n    function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }\r\n    function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }\r\n    function fulfill(value) { resume(\"next\", value); }\r\n    function reject(value) { resume(\"throw\", value); }\r\n    function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\r\n}\r\n\r\nexport function __asyncDelegator(o) {\r\n    var i, p;\r\n    return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\r\n    function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; }\r\n}\r\n\r\nexport function __asyncValues(o) {\r\n    if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n    var m = o[Symbol.asyncIterator], i;\r\n    return m ? m.call(o) : (o = typeof __values === \"function\" ? __values(o) : o[Symbol.iterator](), i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i);\r\n    function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\r\n    function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\r\n}\r\n\r\nexport function __makeTemplateObject(cooked, raw) {\r\n    if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\r\n    return cooked;\r\n};\r\n\r\nvar __setModuleDefault = Object.create ? (function(o, v) {\r\n    Object.defineProperty(o, \"default\", { enumerable: true, value: v });\r\n}) : function(o, v) {\r\n    o[\"default\"] = v;\r\n};\r\n\r\nexport function __importStar(mod) {\r\n    if (mod && mod.__esModule) return mod;\r\n    var result = {};\r\n    if (mod != null) for (var k in mod) if (k !== \"default\" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);\r\n    __setModuleDefault(result, mod);\r\n    return result;\r\n}\r\n\r\nexport function __importDefault(mod) {\r\n    return (mod && mod.__esModule) ? mod : { default: mod };\r\n}\r\n\r\nexport function __classPrivateFieldGet(receiver, state, kind, f) {\r\n    if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a getter\");\r\n    if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot read private member from an object whose class did not declare it\");\r\n    return kind === \"m\" ? f : kind === \"a\" ? f.call(receiver) : f ? f.value : state.get(receiver);\r\n}\r\n\r\nexport function __classPrivateFieldSet(receiver, state, value, kind, f) {\r\n    if (kind === \"m\") throw new TypeError(\"Private method is not writable\");\r\n    if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a setter\");\r\n    if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot write private member to an object whose class did not declare it\");\r\n    return (kind === \"a\" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;\r\n}\r\n\r\nexport function __classPrivateFieldIn(state, receiver) {\r\n    if (receiver === null || (typeof receiver !== \"object\" && typeof receiver !== \"function\")) throw new TypeError(\"Cannot use 'in' operator on non-object\");\r\n    return typeof state === \"function\" ? receiver === state : state.has(receiver);\r\n}\r\n\r\nexport default {\r\n    __extends,\r\n    __assign,\r\n    __rest,\r\n    __decorate,\r\n    __param,\r\n    __metadata,\r\n    __awaiter,\r\n    __generator,\r\n    __createBinding,\r\n    __exportStar,\r\n    __values,\r\n    __read,\r\n    __spread,\r\n    __spreadArrays,\r\n    __spreadArray,\r\n    __await,\r\n    __asyncGenerator,\r\n    __asyncDelegator,\r\n    __asyncValues,\r\n    __makeTemplateObject,\r\n    __importStar,\r\n    __importDefault,\r\n    __classPrivateFieldGet,\r\n    __classPrivateFieldSet,\r\n    __classPrivateFieldIn,\r\n};\r\n", "export function blackman(size) {\n  let blackmanBuffer = new Float32Array(size);\n  let coeff1 = (2 * Math.PI) / (size - 1);\n  let coeff2 = 2 * coeff1;\n\n  //According to http://uk.mathworks.com/help/signal/ref/blackman.html\n  //first half of the window\n  for (let i = 0; i < size / 2; i++) {\n    blackmanBuffer[i] =\n      0.42 - 0.5 * Math.cos(i * coeff1) + 0.08 * Math.cos(i * coeff2);\n  }\n\n  //second half of the window\n  for (let i = Math.ceil(size / 2); i > 0; i--) {\n    blackmanBuffer[size - i] = blackmanBuffer[i - 1];\n  }\n\n  return blackmanBuffer;\n}\n\nexport function sine(size) {\n  let coeff = Math.PI / (size - 1);\n  let sineBuffer = new Float32Array(size);\n\n  for (let i = 0; i < size; i++) {\n    sineBuffer[i] = Math.sin(coeff * i);\n  }\n\n  return sineBuffer;\n}\n\nexport function hanning(size) {\n  let hanningBuffer = new Float32Array(size);\n  for (let i = 0; i < size; i++) {\n    // According to the R documentation\n    // http://ugrad.stat.ubc.ca/R/library/e1071/html/hanning.window.html\n    hanningBuffer[i] = 0.5 - 0.5 * Math.cos((2 * Math.PI * i) / (size - 1));\n  }\n\n  return hanningBuffer;\n}\n\nexport function hamming(size) {\n  let hammingBuffer = new Float32Array(size);\n  for (let i = 0; i < size; i++) {\n    //According to http://uk.mathworks.com/help/signal/ref/hamming.html\n    hammingBuffer[i] = 0.54 - 0.46 * Math.cos(2 * Math.PI * (i / size - 1));\n  }\n\n  return hammingBuffer;\n}\n", "import * as windowing from \"./windowing\";\n\nlet windows = {};\n\nexport function isPowerOfTwo(num) {\n  while (num % 2 === 0 && num > 1) {\n    num /= 2;\n  }\n\n  return num === 1;\n}\n\nexport function error(message) {\n  throw new Error(\"Meyda: \" + message);\n}\n\nexport function pointwiseBufferMult(a, b) {\n  let c: number[] = [];\n  for (let i = 0; i < Math.min(a.length, b.length); i++) {\n    c[i] = a[i] * b[i];\n  }\n\n  return c;\n}\n\nexport function applyWindow(signal, windowname) {\n  if (windowname !== \"rect\") {\n    if (windowname === \"\" || !windowname) windowname = \"hanning\";\n    if (!windows[windowname]) windows[windowname] = {};\n\n    if (!windows[windowname][signal.length]) {\n      try {\n        windows[windowname][signal.length] = windowing[windowname](\n          signal.length\n        );\n      } catch (e) {\n        throw new Error(\"Invalid windowing function\");\n      }\n    }\n\n    signal = pointwiseBufferMult(signal, windows[windowname][signal.length]);\n  }\n\n  return signal;\n}\n\nexport function createBarkScale(length, sampleRate, bufferSize): Float32Array {\n  let barkScale = new Float32Array(length);\n\n  for (var i = 0; i < barkScale.length; i++) {\n    barkScale[i] = (i * sampleRate) / bufferSize;\n    barkScale[i] =\n      13 * Math.atan(barkScale[i] / 1315.8) +\n      3.5 * Math.atan(Math.pow(barkScale[i] / 7518, 2));\n  }\n\n  return barkScale;\n}\n\nexport function typedToArray(t) {\n  // utility to convert typed arrays to normal arrays\n  return Array.prototype.slice.call(t);\n}\n\nexport function arrayToTyped(t) {\n  // utility to convert arrays to typed F32 arrays\n  return Float32Array.from(t);\n}\n\nexport function _normalize(num, range) {\n  return num / range;\n}\n\nexport function normalize(a, range) {\n  return a.map(function (n) {\n    return _normalize(n, range);\n  });\n}\n\nexport function normalizeToOne(a) {\n  var max = Math.max.apply(null, a);\n\n  return a.map(function (n) {\n    return n / max;\n  });\n}\n\nexport function mean(a) {\n  return (\n    a.reduce(function (prev, cur) {\n      return prev + cur;\n    }) / a.length\n  );\n}\n\nfunction _melToFreq(melValue) {\n  var freqValue = 700 * (Math.exp(melValue / 1125) - 1);\n  return freqValue;\n}\n\nfunction _freqToMel(freqValue) {\n  var melValue = 1125 * Math.log(1 + freqValue / 700);\n  return melValue;\n}\n\nexport function melToFreq(mV) {\n  return _melToFreq(mV);\n}\n\nexport function freqToMel(fV) {\n  return _freqToMel(fV);\n}\n\nexport function createMelFilterBank(\n  numFilters: number,\n  sampleRate: number,\n  bufferSize: number\n): number[][] {\n  //the +2 is the upper and lower limits\n  let melValues = new Float32Array(numFilters + 2);\n  let melValuesInFreq = new Float32Array(numFilters + 2);\n\n  //Generate limits in Hz - from 0 to the nyquist.\n  let lowerLimitFreq = 0;\n  let upperLimitFreq = sampleRate / 2;\n\n  //Convert the limits to Mel\n  let lowerLimitMel = _freqToMel(lowerLimitFreq);\n  let upperLimitMel = _freqToMel(upperLimitFreq);\n\n  //Find the range\n  let range = upperLimitMel - lowerLimitMel;\n\n  //Find the range as part of the linear interpolation\n  let valueToAdd = range / (numFilters + 1);\n\n  let fftBinsOfFreq: number[] = new Array(numFilters + 2);\n\n  for (let i = 0; i < melValues.length; i++) {\n    // Initialising the mel frequencies\n    // They're a linear interpolation between the lower and upper limits.\n    melValues[i] = i * valueToAdd;\n\n    // Convert back to Hz\n    melValuesInFreq[i] = _melToFreq(melValues[i]);\n\n    // Find the corresponding bins\n    fftBinsOfFreq[i] = Math.floor(\n      ((bufferSize + 1) * melValuesInFreq[i]) / sampleRate\n    );\n  }\n\n  var filterBank: number[][] = new Array(numFilters);\n  for (let j = 0; j < filterBank.length; j++) {\n    // Create a two dimensional array of size numFilters * (buffersize/2)+1\n    // pre-populating the arrays with 0s.\n    filterBank[j] = new Array(bufferSize / 2 + 1).fill(0);\n\n    //creating the lower and upper slopes for each bin\n    for (let i = fftBinsOfFreq[j]; i < fftBinsOfFreq[j + 1]; i++) {\n      filterBank[j][i] =\n        (i - fftBinsOfFreq[j]) / (fftBinsOfFreq[j + 1] - fftBinsOfFreq[j]);\n    }\n\n    for (let i = fftBinsOfFreq[j + 1]; i < fftBinsOfFreq[j + 2]; i++) {\n      filterBank[j][i] =\n        (fftBinsOfFreq[j + 2] - i) /\n        (fftBinsOfFreq[j + 2] - fftBinsOfFreq[j + 1]);\n    }\n  }\n\n  return filterBank;\n}\n\nexport function hzToOctaves(freq, A440) {\n  return Math.log2((16 * freq) / A440);\n}\n\nexport function normalizeByColumn(a) {\n  var emptyRow = a[0].map(() => 0);\n  var colDenominators = a\n    .reduce((acc, row) => {\n      row.forEach((cell, j) => {\n        acc[j] += Math.pow(cell, 2);\n      });\n      return acc;\n    }, emptyRow)\n    .map(Math.sqrt);\n  return a.map((row, i) => row.map((v, j) => v / (colDenominators[j] || 1)));\n}\n\nexport function createChromaFilterBank(\n  numFilters,\n  sampleRate,\n  bufferSize,\n  centerOctave = 5,\n  octaveWidth = 2,\n  baseC = true,\n  A440 = 440\n) {\n  var numOutputBins = Math.floor(bufferSize / 2) + 1;\n\n  var frequencyBins = new Array(bufferSize)\n    .fill(0)\n    .map(\n      (_, i) => numFilters * hzToOctaves((sampleRate * i) / bufferSize, A440)\n    );\n\n  // Set a value for the 0 Hz bin that is 1.5 octaves below bin 1\n  // (so chroma is 50% rotated from bin 1, and bin width is broad)\n  frequencyBins[0] = frequencyBins[1] - 1.5 * numFilters;\n\n  var binWidthBins = frequencyBins\n    .slice(1)\n    .map((v, i) => Math.max(v - frequencyBins[i]), 1)\n    .concat([1]);\n\n  var halfNumFilters = Math.round(numFilters / 2);\n\n  var filterPeaks = new Array(numFilters)\n    .fill(0)\n    .map((_, i) =>\n      frequencyBins.map(\n        (frq) =>\n          ((10 * numFilters + halfNumFilters + frq - i) % numFilters) -\n          halfNumFilters\n      )\n    );\n\n  var weights = filterPeaks.map((row, i) =>\n    row.map((_, j) =>\n      Math.exp(-0.5 * Math.pow((2 * filterPeaks[i][j]) / binWidthBins[j], 2))\n    )\n  );\n\n  weights = normalizeByColumn(weights);\n\n  if (octaveWidth) {\n    var octaveWeights = frequencyBins.map((v) =>\n      Math.exp(\n        -0.5 * Math.pow((v / numFilters - centerOctave) / octaveWidth, 2)\n      )\n    );\n    weights = weights.map((row) =>\n      row.map((cell, j) => cell * octaveWeights[j])\n    );\n  }\n\n  if (baseC) {\n    weights = [...weights.slice(3), ...weights.slice(0, 3)];\n  }\n\n  return weights.map((row) => row.slice(0, numOutputBins));\n}\n\nexport function frame(buffer, frameLength, hopLength) {\n  if (buffer.length < frameLength) {\n    throw new Error(\"Buffer is too short for frame length\");\n  }\n  if (hopLength < 1) {\n    throw new Error(\"Hop length cannot be less that 1\");\n  }\n  if (frameLength < 1) {\n    throw new Error(\"Frame length cannot be less that 1\");\n  }\n\n  const numFrames = 1 + Math.floor((buffer.length - frameLength) / hopLength);\n\n  return new Array(numFrames)\n    .fill(0)\n    .map((_, i) => buffer.slice(i * hopLength, i * hopLength + frameLength));\n}\n", "export function mu(i: number, amplitudeSpect: Float32Array): number {\n  var numerator = 0;\n  var denominator = 0;\n  for (var k = 0; k < amplitudeSpect.length; k++) {\n    numerator += Math.pow(k, i) * Math.abs(amplitudeSpect[k]);\n    denominator += amplitudeSpect[k];\n  }\n  return numerator / denominator;\n}\n", "export default function ({\n  ampSpectrum,\n  barkScale,\n  numberOfBarkBands = 24,\n}: {\n  ampSpectrum: Float32Array;\n  barkScale: Float32Array;\n  numberOfBarkBands?: number;\n}): {\n  specific: Float32Array;\n  total: number;\n} {\n  if (typeof ampSpectrum !== \"object\" || typeof barkScale !== \"object\") {\n    throw new TypeError();\n  }\n\n  var NUM_BARK_BANDS = numberOfBarkBands;\n  var specific = new Float32Array(NUM_BARK_BANDS);\n  var total = 0;\n  var normalisedSpectrum = ampSpectrum;\n  var bbLimits = new Int32Array(NUM_BARK_BANDS + 1);\n\n  bbLimits[0] = 0;\n  var currentBandEnd =\n    barkScale[normalisedSpectrum.length - 1] / NUM_BARK_BANDS;\n  var currentBand = 1;\n  for (let i = 0; i < normalisedSpectrum.length; i++) {\n    while (barkScale[i] > currentBandEnd) {\n      bbLimits[currentBand++] = i;\n      currentBandEnd =\n        (currentBand * barkScale[normalisedSpectrum.length - 1]) /\n        NUM_BARK_BANDS;\n    }\n  }\n\n  bbLimits[NUM_BARK_BANDS] = normalisedSpectrum.length - 1;\n\n  //process\n\n  for (let i = 0; i < NUM_BARK_BANDS; i++) {\n    let sum = 0;\n    for (let j = bbLimits[i]; j < bbLimits[i + 1]; j++) {\n      sum += normalisedSpectrum[j];\n    }\n\n    specific[i] = Math.pow(sum, 0.23);\n  }\n\n  //get total loudness\n  for (let i = 0; i < specific.length; i++) {\n    total += specific[i];\n  }\n\n  return {\n    specific: specific,\n    total: total,\n  };\n}\n", "export default function ({\n  ampSpectrum,\n}: {\n  ampSpectrum: Float32Array;\n}): Float32Array {\n  if (typeof ampSpectrum !== \"object\") {\n    throw new TypeError();\n  }\n\n  var powerSpectrum = new Float32Array(ampSpectrum.length);\n  for (var i = 0; i < powerSpectrum.length; i++) {\n    powerSpectrum[i] = Math.pow(ampSpectrum[i], 2);\n  }\n\n  return powerSpectrum;\n}\n", "import extractPowerSpectrum from \"./powerSpectrum\";\n\nexport default function ({\n  ampSpectrum,\n  melFilterBank,\n  bufferSize,\n}: {\n  ampSpectrum: Float32Array;\n  melFilterBank: number[][];\n  bufferSize: number;\n}): number[] {\n  if (typeof ampSpectrum !== \"object\") {\n    throw new TypeError(\"Valid ampSpectrum is required to generate melBands\");\n  }\n  if (typeof melFilterBank !== \"object\") {\n    throw new TypeError(\"Valid melFilterBank is required to generate melBands\");\n  }\n\n  let powSpec = extractPowerSpectrum({ ampSpectrum });\n  let numFilters = melFilterBank.length;\n  let filtered: Float32Array[] = Array(numFilters);\n  let loggedMelBands: Float32Array = new Float32Array(numFilters);\n\n  for (let i = 0; i < loggedMelBands.length; i++) {\n    filtered[i] = new Float32Array(bufferSize / 2);\n    loggedMelBands[i] = 0;\n    for (let j = 0; j < bufferSize / 2; j++) {\n      //point-wise multiplication between power spectrum and filterbanks.\n      filtered[i][j] = melFilterBank[i][j] * powSpec[j];\n\n      //summing up all of the coefficients into one array\n      loggedMelBands[i] += filtered[i][j];\n    }\n\n    //log each coefficient.\n    loggedMelBands[i] = Math.log(loggedMelBands[i] + 1);\n  }\n  return Array.prototype.slice.call(loggedMelBands);\n}\n", "import rms from \"./extractors/rms\";\nimport energy from \"./extractors/energy\";\nimport spectralSlope from \"./extractors/spectralSlope\";\nimport spectralCentroid from \"./extractors/spectralCentroid\";\nimport spectralRolloff from \"./extractors/spectralRolloff\";\nimport spectralFlatness from \"./extractors/spectralFlatness\";\nimport spectralSpread from \"./extractors/spectralSpread\";\nimport spectralSkewness from \"./extractors/spectralSkewness\";\nimport spectralKurtosis from \"./extractors/spectralKurtosis\";\nimport zcr from \"./extractors/zcr\";\nimport loudness from \"./extractors/loudness\";\nimport perceptualSpread from \"./extractors/perceptualSpread\";\nimport perceptualSharpness from \"./extractors/perceptualSharpness\";\nimport mfcc from \"./extractors/mfcc\";\nimport chroma from \"./extractors/chroma\";\nimport powerSpectrum from \"./extractors/powerSpectrum\";\nimport spectralFlux from \"./extractors/spectralFlux\";\nimport spectralCrest from \"./extractors/spectralCrest\";\nimport melBands from \"./extractors/melBands\";\n\nlet buffer = function (args) {\n  return args.signal;\n};\n\nlet complexSpectrum = function (args) {\n  return args.complexSpectrum;\n};\n\nlet amplitudeSpectrum = function (args) {\n  return args.ampSpectrum;\n};\n\nexport {\n  buffer,\n  rms,\n  energy,\n  complexSpectrum,\n  spectralSlope,\n  spectralCentroid,\n  spectralRolloff,\n  spectralFlatness,\n  spectralSpread,\n  spectralSkewness,\n  spectralKurtosis,\n  amplitudeSpectrum,\n  zcr,\n  loudness,\n  perceptualSpread,\n  perceptualSharpness,\n  powerSpectrum,\n  mfcc,\n  chroma,\n  spectralFlux,\n  spectralCrest,\n  melBands\n};\n", "export default function ({\n  ampSpectrum,\n  chromaFilterBank,\n}: {\n  ampSpectrum: Float32Array;\n  chromaFilterBank: number[][];\n}): number[] {\n  if (typeof ampSpectrum !== \"object\") {\n    throw new TypeError(\"Valid ampSpectrum is required to generate chroma\");\n  }\n  if (typeof chromaFilterBank !== \"object\") {\n    throw new TypeError(\n      \"Valid chromaFilterBank is required to generate chroma\"\n    );\n  }\n\n  var chromagram = chromaFilterBank.map((row, i) =>\n    ampSpectrum.reduce((acc, v, j) => acc + v * row[j], 0)\n  );\n  var maxVal = Math.max(...chromagram);\n\n  return maxVal ? chromagram.map((v) => v / maxVal) : chromagram;\n}\n", "export default function ({ signal }: { signal: Float32Array }): number {\n  if (typeof signal !== \"object\") {\n    throw new TypeError();\n  }\n\n  var energy = 0;\n  for (var i = 0; i < signal.length; i++) {\n    energy += Math.pow(Math.abs(signal[i]), 2);\n  }\n\n  return energy;\n}\n", "import extractMelBands from \"./melBands\";\nimport dct from \"dct\";\n\nexport default function ({\n  ampSpectrum,\n  melFilterBank,\n  numberOfMFCCCoefficients,\n  bufferSize,\n}: {\n  ampSpectrum: Float32Array;\n  melFilterBank: number[][];\n  numberOfMFCCCoefficients: number;\n  bufferSize: number;\n}): number[] {\n  // Tutorial from:\n  // http://practicalcryptography.com/miscellaneous/machine-learning\n  // /guide-mel-frequency-cepstral-coefficients-mfccs/\n  // @ts-ignore\n\n  let _numberOfMFCCCoefficients = Math.min(\n    40,\n    Math.max(1, numberOfMFCCCoefficients || 13)\n  );\n\n  let numFilters = melFilterBank.length;\n  if (numFilters < _numberOfMFCCCoefficients) {\n    throw new Error(\n      \"Insufficient filter bank for requested number of coefficients\"\n    );\n  }\n  const loggedMelBandsArray = extractMelBands({\n    ampSpectrum,\n    melFilterBank,\n    bufferSize,\n  });\n  let mfccs: number[] = dct(loggedMelBandsArray).slice(\n    0,\n    _numberOfMFCCCoefficients\n  );\n\n  return mfccs;\n}\n", "import loudness from \"./loudness\";\n\nexport default function ({\n  ampSpectrum,\n  barkScale,\n}: {\n  ampSpectrum: Float32Array;\n  barkScale: Float32Array;\n}): number {\n  var loudnessValue = loudness({ ampSpectrum, barkScale });\n  var spec = loudnessValue.specific;\n  var output = 0;\n\n  for (var i = 0; i < spec.length; i++) {\n    if (i < 15) {\n      output += (i + 1) * spec[i + 1];\n    } else {\n      output += 0.066 * Math.exp(0.171 * (i + 1));\n    }\n  }\n\n  output *= 0.11 / loudnessValue.total;\n\n  return output;\n}\n", "import loudness from \"./loudness\";\n\nexport default function ({\n  ampSpectrum,\n  barkScale,\n}: {\n  ampSpectrum: Float32Array;\n  barkScale: Float32Array;\n}): number {\n  var loudnessValue = loudness({ ampSpectrum, barkScale });\n\n  var max = 0;\n  for (var i = 0; i < loudnessValue.specific.length; i++) {\n    if (loudnessValue.specific[i] > max) {\n      max = loudnessValue.specific[i];\n    }\n  }\n\n  var spread = Math.pow((loudnessValue.total - max) / loudnessValue.total, 2);\n\n  return spread;\n}\n", "export default function ({ signal }: { signal: Float32Array }): number {\n  // Keeping this bad runtime typecheck for consistency\n  if (typeof signal !== \"object\") {\n    throw new TypeError();\n  }\n\n  var rms = 0;\n  for (var i = 0; i < signal.length; i++) {\n    rms += Math.pow(signal[i], 2);\n  }\n\n  rms = rms / signal.length;\n  rms = Math.sqrt(rms);\n\n  return rms;\n}\n", "import { mu } from \"./extractorUtilities\";\n\nexport default function ({\n  ampSpectrum,\n}: {\n  ampSpectrum: Float32Array;\n}): number {\n  if (typeof ampSpectrum !== \"object\") {\n    throw new TypeError();\n  }\n\n  return mu(1, ampSpectrum);\n}\n", "export default function ({\n  ampSpectrum,\n}: {\n  ampSpectrum: Float32Array;\n}): number {\n  if (typeof ampSpectrum !== \"object\") {\n    throw new TypeError();\n  }\n\n  var rms = 0;\n  var peak = -Infinity;\n\n  ampSpectrum.forEach((x) => {\n    rms += Math.pow(x, 2);\n    peak = x > peak ? x : peak;\n  });\n\n  rms = rms / ampSpectrum.length;\n  rms = Math.sqrt(rms);\n\n  return peak / rms;\n}\n", "export default function ({\n  ampSpectrum,\n}: {\n  ampSpectrum: Float32Array;\n}): number {\n  if (typeof ampSpectrum !== \"object\") {\n    throw new TypeError();\n  }\n\n  var numerator = 0;\n  var denominator = 0;\n  for (var i = 0; i < ampSpectrum.length; i++) {\n    numerator += Math.log(ampSpectrum[i]);\n    denominator += ampSpectrum[i];\n  }\n\n  return (\n    (Math.exp(numerator / ampSpectrum.length) * ampSpectrum.length) /\n    denominator\n  );\n}\n", "// This file isn't being typechecked at all because there are major issues with it.\n// See #852 for details. Once that's merged, this file should be typechecked.\n// @ts-nocheck\nexport default function ({\n  signal,\n  previousSignal,\n  bufferSize,\n}: {\n  signal: Float32Array;\n  previousSignal: Float32Array;\n  bufferSize: number;\n}): number {\n  if (typeof signal !== \"object\" || typeof previousSignal != \"object\") {\n    throw new TypeError();\n  }\n\n  let sf = 0;\n  for (let i = -(bufferSize / 2); i < signal.length / 2 - 1; i++) {\n    x = Math.abs(signal[i]) - Math.abs(previousSignal[i]);\n    sf += (x + Math.abs(x)) / 2;\n  }\n\n  return sf;\n}\n", "import { mu } from \"./extractorUtilities\";\n\nexport default function ({\n  ampSpectrum,\n}: {\n  ampSpectrum: Float32Array;\n}): number {\n  if (typeof ampSpectrum !== \"object\") {\n    throw new TypeError();\n  }\n\n  var ampspec = ampSpectrum;\n  var mu1 = mu(1, ampspec);\n  var mu2 = mu(2, ampspec);\n  var mu3 = mu(3, ampspec);\n  var mu4 = mu(4, ampspec);\n  var numerator = -3 * Math.pow(mu1, 4) + 6 * mu1 * mu2 - 4 * mu1 * mu3 + mu4;\n  var denominator = Math.pow(Math.sqrt(mu2 - Math.pow(mu1, 2)), 4);\n  return numerator / denominator;\n}\n", "export default function ({\n  ampSpectrum,\n  sampleRate,\n}: {\n  ampSpectrum: Float32Array;\n  sampleRate: number;\n}): number {\n  if (typeof ampSpectrum !== \"object\") {\n    throw new TypeError();\n  }\n\n  var ampspec = ampSpectrum;\n\n  //calculate nyquist bin\n  var nyqBin = sampleRate / (2 * (ampspec.length - 1));\n  var ec = 0;\n  for (var i = 0; i < ampspec.length; i++) {\n    ec += ampspec[i];\n  }\n\n  var threshold = 0.99 * ec;\n  var n = ampspec.length - 1;\n  while (ec > threshold && n >= 0) {\n    ec -= ampspec[n];\n    --n;\n  }\n\n  return (n + 1) * nyqBin;\n}\n", "import { mu } from \"./extractorUtilities\";\n\nexport default function ({\n  ampSpectrum,\n}: {\n  ampSpectrum: Float32Array;\n}): number {\n  if (typeof ampSpectrum !== \"object\") {\n    throw new TypeError();\n  }\n\n  var mu1 = mu(1, ampSpectrum);\n  var mu2 = mu(2, ampSpectrum);\n  var mu3 = mu(3, ampSpectrum);\n  var numerator = 2 * Math.pow(mu1, 3) - 3 * mu1 * mu2 + mu3;\n  var denominator = Math.pow(Math.sqrt(mu2 - Math.pow(mu1, 2)), 3);\n  return numerator / denominator;\n}\n", "export default function ({\n  ampSpectrum,\n  sampleRate,\n  bufferSize,\n}: {\n  ampSpectrum: Float32Array;\n  sampleRate: number;\n  bufferSize: number;\n}): number {\n  if (typeof ampSpectrum !== \"object\") {\n    throw new TypeError();\n  }\n\n  //linear regression\n  let ampSum = 0;\n  let freqSum = 0;\n  let freqs = new Float32Array(ampSpectrum.length);\n  let powFreqSum = 0;\n  let ampFreqSum = 0;\n\n  for (var i = 0; i < ampSpectrum.length; i++) {\n    ampSum += ampSpectrum[i];\n    let curFreq = (i * sampleRate) / bufferSize;\n    freqs[i] = curFreq;\n    powFreqSum += curFreq * curFreq;\n    freqSum += curFreq;\n    ampFreqSum += curFreq * ampSpectrum[i];\n  }\n\n  return (\n    (ampSpectrum.length * ampFreqSum - freqSum * ampSum) /\n    (ampSum * (powFreqSum - Math.pow(freqSum, 2)))\n  );\n}\n", "import { mu } from \"./extractorUtilities\";\n\nexport default function ({\n  ampSpectrum,\n}: {\n  ampSpectrum: Float32Array;\n}): number {\n  if (typeof ampSpectrum !== \"object\") {\n    throw new TypeError();\n  }\n\n  return Math.sqrt(mu(2, ampSpectrum) - Math.pow(mu(1, ampSpectrum), 2));\n}\n", "export default function ({ signal }: { signal: Float32Array }): number {\n  if (typeof signal !== \"object\") {\n    throw new TypeError();\n  }\n\n  var zcr = 0;\n  for (var i = 1; i < signal.length; i++) {\n    if (\n      (signal[i - 1] >= 0 && signal[i] < 0) ||\n      (signal[i - 1] < 0 && signal[i] >= 0)\n    ) {\n      zcr++;\n    }\n  }\n\n  return zcr;\n}\n", "import * as utilities from \"./utilities\";\nimport * as featureExtractors from \"./featureExtractors\";\nimport type {\n  MeydaAudioFeature,\n  MeydaWindowingFunction,\n  MeydaFeaturesObject,\n} from \"./main\";\n\n/**\n * MeydaAnalyzerOptions\n */\nexport interface MeydaAnalyzerOptions {\n  /**\n   * The Audio Context for the MeydaAnalyzer to operate in.\n   */\n  audioContext: AudioContext;\n  /**\n   * The Audio Node for Meyda to listen to.\n   */\n  source: AudioNode;\n  /**\n   * The size of the buffer.\n   */\n  bufferSize: number;\n  /**\n   * The number of samples between the start of each buffer.\n   */\n  hopSize?: number | undefined;\n  /**\n   * The number of samples per second in the audioContext.\n   */\n  sampleRate?: number | undefined;\n  /**\n   * Pass `true` to start feature extraction immediately\n   */\n  startImmediately?: boolean | undefined;\n  /**\n   * The channel from the input node to listen to\n   */\n  channel?: number | undefined;\n  /**\n   * The Windowing Function to apply to the signal before transformation to the frequency domain.\n   */\n  windowingFunction?: MeydaWindowingFunction | undefined;\n  /**\n   * What feature extractors to return to the callback.\n   */\n  featureExtractors?:\n    | MeydaAudioFeature\n    | ReadonlyArray<MeydaAudioFeature>\n    | undefined;\n  inputs?: number | undefined;\n  outputs?: number | undefined;\n  /**\n   * The number of mfcc coefficients to calculate for each buffer.\n   */\n  numberOfMFCCCoefficients?: number | undefined;\n  /**\n   * The number of bark bands to calculate for use in feature extractors.\n   */\n  numberOfBarkBands?: number | undefined;\n  /**\n   * The callback to receive your audio features. Will be called once for each buffer of input audio.\n   */\n  callback?: ((features: Partial<MeydaFeaturesObject>) => void) | undefined;\n}\n\n/**\n * Meyda's interface to the Web Audio API. MeydaAnalyzer abstracts an API on\n * top of the Web Audio API's ScriptProcessorNode, running the Meyda audio\n * feature extractors inside that context.\n *\n * MeydaAnalyzer's constructor should not be called directly - MeydaAnalyzer\n * objects should be generated using the {@link createMeydaAnalyzer}\n * factory function in the main Meyda class.\n *\n * Options are of type {@link MeydaAnalyzerOptions}.\n *\n * @example\n * ```javascript\n * const analyzer = Meyda.createMeydaAnalyzer({\n *   \"audioContext\": audioContext,\n *   \"source\": source,\n *   \"bufferSize\": 512,\n *   \"featureExtractors\": [\"rms\"],\n *   \"inputs\": 2,\n *   \"numberOfMFCCCoefficients\": 20\n *   \"callback\": features => {\n *     levelRangeElement.value = features.rms;\n *   }\n * });\n * ```\n */\nexport class MeydaAnalyzer {\n  /** @hidden */\n  _m: any;\n\n  /** @hidden */\n  constructor(options: MeydaAnalyzerOptions, _this) {\n    this._m = _this;\n    if (!options.audioContext) {\n      throw this._m.errors.noAC;\n    } else if (\n      options.bufferSize &&\n      !utilities.isPowerOfTwo(options.bufferSize)\n    ) {\n      throw this._m._errors.notPow2;\n    } else if (!options.source) {\n      throw this._m._errors.noSource;\n    }\n\n    this._m.audioContext = options.audioContext;\n\n    // TODO: validate options\n    this._m.bufferSize = options.bufferSize || this._m.bufferSize || 256;\n    this._m.hopSize = options.hopSize || this._m.hopSize || this._m.bufferSize;\n    this._m.sampleRate =\n      options.sampleRate || this._m.audioContext.sampleRate || 44100;\n    this._m.callback = options.callback;\n    this._m.windowingFunction = options.windowingFunction || \"hanning\";\n    this._m.featureExtractors = featureExtractors;\n    this._m.EXTRACTION_STARTED = options.startImmediately || false;\n    this._m.channel = typeof options.channel === \"number\" ? options.channel : 0;\n    this._m.inputs = options.inputs || 1;\n    this._m.outputs = options.outputs || 1;\n    this._m.numberOfMFCCCoefficients =\n      options.numberOfMFCCCoefficients ||\n      this._m.numberOfMFCCCoefficients ||\n      13;\n    this._m.numberOfBarkBands =\n      options.numberOfBarkBands || this._m.numberOfBarkBands || 24;\n\n    //create nodes\n    this._m.spn = this._m.audioContext.createScriptProcessor(\n      this._m.bufferSize,\n      this._m.inputs,\n      this._m.outputs\n    );\n    this._m.spn.connect(this._m.audioContext.destination);\n\n    this._m._featuresToExtract = options.featureExtractors || [];\n\n    //always recalculate BS and MFB when a new Meyda analyzer is created.\n    this._m.barkScale = utilities.createBarkScale(\n      this._m.bufferSize,\n      this._m.sampleRate,\n      this._m.bufferSize\n    );\n    this._m.melFilterBank = utilities.createMelFilterBank(\n      Math.max(this._m.melBands, this._m.numberOfMFCCCoefficients),\n      this._m.sampleRate,\n      this._m.bufferSize\n    );\n\n    this._m.inputData = null;\n    this._m.previousInputData = null;\n\n    this._m.frame = null;\n    this._m.previousFrame = null;\n\n    this.setSource(options.source);\n\n    this._m.spn.onaudioprocess = (e) => {\n      var buffer;\n      if (this._m.inputData !== null) {\n        this._m.previousInputData = this._m.inputData;\n      }\n\n      this._m.inputData = e.inputBuffer.getChannelData(this._m.channel);\n\n      if (!this._m.previousInputData) {\n        buffer = this._m.inputData;\n      } else {\n        buffer = new Float32Array(\n          this._m.previousInputData.length +\n            this._m.inputData.length -\n            this._m.hopSize\n        );\n        buffer.set(this._m.previousInputData.slice(this._m.hopSize));\n        buffer.set(\n          this._m.inputData,\n          this._m.previousInputData.length - this._m.hopSize\n        );\n      }\n\n      var frames = utilities.frame(buffer, this._m.bufferSize, this._m.hopSize);\n\n      frames.forEach((f) => {\n        this._m.frame = f;\n\n        var features = this._m.extract(\n          this._m._featuresToExtract,\n          this._m.frame,\n          this._m.previousFrame\n        );\n\n        // call callback if applicable\n        if (\n          typeof this._m.callback === \"function\" &&\n          this._m.EXTRACTION_STARTED\n        ) {\n          this._m.callback(features);\n        }\n\n        this._m.previousFrame = this._m.frame;\n      });\n    };\n  }\n\n  /**\n   * Start feature extraction\n   * The audio features will be passed to the callback function that was defined\n   * in the MeydaOptions that were passed to the factory when constructing the\n   * MeydaAnalyzer.\n   * @param {(string|Array.<string>)} [features]\n   * Change the features that Meyda is extracting. Defaults to the features that\n   * were set upon construction in the options parameter.\n   * @example\n   * ```javascript\n   * analyzer.start('chroma');\n   * ```\n   */\n  start(features?: MeydaAudioFeature | ReadonlyArray<MeydaAudioFeature>): void {\n    this._m._featuresToExtract = features || this._m._featuresToExtract;\n    this._m.EXTRACTION_STARTED = true;\n  }\n\n  /**\n   * Stop feature extraction.\n   * @example\n   * ```javascript\n   * analyzer.stop();\n   * ```\n   */\n  stop(): void {\n    this._m.EXTRACTION_STARTED = false;\n  }\n\n  /**\n   * Set the Audio Node for Meyda to listen to.\n   * @param {AudioNode} source - The Audio Node for Meyda to listen to\n   * @example\n   * ```javascript\n   * analyzer.setSource(audioSourceNode);\n   * ```\n   */\n  setSource(source: AudioNode): void {\n    this._m.source && this._m.source.disconnect(this._m.spn);\n    this._m.source = source;\n    this._m.source.connect(this._m.spn);\n  }\n\n  /**\n   * Set the channel of the audio node for Meyda to listen to\n   * @param {number} channel - the index of the channel on the input audio node\n   * for Meyda to listen to.\n   * @example\n   * ```javascript\n   * analyzer.setChannel(0);\n   * ```\n   */\n  setChannel(channel: number) {\n    if (channel <= this._m.inputs) {\n      this._m.channel = channel;\n    } else {\n      console.error(\n        `Channel ${channel} does not exist. Make sure you've provided a value for 'inputs' that is greater than ${channel} when instantiating the MeydaAnalyzer`\n      );\n    }\n  }\n\n  /**\n   * Get a set of features from the current frame.\n   * @param {(string|Array.<string>)} [features]\n   * Change the features that Meyda is extracting\n   * @example\n   * ```javascript\n   * analyzer.get('spectralFlatness');\n   * ```\n   */\n  get(\n    features?: MeydaAudioFeature | ReadonlyArray<MeydaAudioFeature>\n  ): Partial<MeydaFeaturesObject> | null {\n    if (this._m.inputData) {\n      return this._m.extract(\n        features || this._m._featuresToExtract,\n        this._m.inputData,\n        this._m.previousInputData\n      );\n    } else {\n      return null;\n    }\n  }\n}\n", "/**\n * This file contains the default export for Meyda, you probably want to check\n * out {@link default}\n *\n * @module Meyda\n */\n\nimport * as utilities from \"./utilities\";\nimport * as extractors from \"./featureExtractors\";\nimport { fft } from \"fftjs\";\nimport { MeydaAnalyzer, MeydaAnalyzerOptions } from \"./meyda-wa\";\nexport interface MeydaFeaturesObject {\n  amplitudeSpectrum: Float32Array;\n  buffer: number[];\n  chroma: number[];\n  complexSpectrum: {\n    real: number[];\n    imag: number[];\n  };\n  energy: number;\n  loudness: {\n    specific: Float32Array;\n    total: number;\n  };\n  mfcc: number[];\n  perceptualSharpness: number;\n  perceptualSpread: number;\n  powerSpectrum: Float32Array;\n  rms: number;\n  spectralCentroid: number;\n  spectralFlatness: number;\n  spectralKurtosis: number;\n  spectralRolloff: number;\n  spectralSkewness: number;\n  spectralSlope: number;\n  spectralSpread: number;\n  spectralCrest: number;\n  zcr: number;\n}\n\nexport type MeydaWindowingFunction =\n  | \"blackman\"\n  | \"sine\"\n  | \"hanning\"\n  | \"hamming\";\n\nexport type MeydaAudioFeature =\n  | \"amplitudeSpectrum\"\n  | \"chroma\"\n  | \"complexSpectrum\"\n  | \"energy\"\n  | \"loudness\"\n  | \"mfcc\"\n  | \"perceptualSharpness\"\n  | \"perceptualSpread\"\n  | \"powerSpectrum\"\n  | \"rms\"\n  | \"spectralCentroid\"\n  | \"spectralFlatness\"\n  | \"spectralFlux\"\n  | \"spectralKurtosis\"\n  | \"spectralRolloff\"\n  | \"spectralSkewness\"\n  | \"spectralSlope\"\n  | \"spectralSpread\"\n  | \"spectralCrest\"\n  | \"zcr\"\n  | \"buffer\"\n  | \"melBands\";\n\n/**\n * A type representing an audio signal. In general it should be an array of\n * numbers that is sliceable. Float32Array is assignable here, and we generally\n * expect that most signals will be in this format.\n */\nexport type MeydaSignal = SliceableArrayLike<number> | Float32Array;\n\nexport interface SliceableArrayLike<T> extends ArrayLike<T> {\n  slice(start: number, end: number): SliceableArrayLike<T>;\n}\n\n/**\n * Meyda is a library for extracting audio features from an audio signal.\n *\n * The primary entry points are {@link extract} for audio feature extraction on\n * raw signals you have in memory, and {@link createMeydaAnalyzer}, which\n * provides a {@link MeydaAnalyzer} object that can be used to extract features\n * on a Web Audio API AudioNode. The latter is only supported on web targets,\n * though if you're using the Web Audio API in a non-web target, we'd love to\n * hear from you.\n *\n * We also expose {@link listAvailableFeatureExtractors} which returns a list of the\n * available feature extractors, and {@link windowing}, which lets you apply\n * a windowing function to your signal outside of Meyda.\n *\n * We existed long before esmodules, so our backwards compatible API may seem\n * unusual. We export a default object, with read/write fields that control\n * various parameters of the audio feature extraction process. We're working on\n * a new interface, check out [#257](https://github.com/meyda/meyda/issues/257)\n * for more information.\n */\ninterface Meyda {\n  /**\n   * Meyda stores a reference to the relevant audio context here for use inside\n   * the Web Audio API.\n   */\n  audioContext: AudioContext | null;\n  /**\n   * Meyda keeps an internal ScriptProcessorNode in which it runs audio feature\n   * extraction. The ScriptProcessorNode is stored in this member variable.\n   * @hidden\n   */\n  spn: ScriptProcessorNode | null;\n  /**\n   * The length of each buffer that Meyda will extract audio on. When recieving\n   * input via the Web Audio API, the Script Processor Node chunks incoming audio\n   * into arrays of this length. Longer buffers allow for more precision in the\n   * frequency domain, but increase the amount of time it takes for Meyda to\n   * output a set of audio features for the buffer. You can calculate how many\n   * sets of audio features Meyda will output per second by dividing the\n   * buffer size by the sample rate. If you're using Meyda for visualisation,\n   * make sure that you're collecting audio features at a rate that's faster\n   * than or equal to the video frame rate you expect.\n   */\n  bufferSize: number;\n  /**\n   * The number of samples per second of the incoming audio. This affects\n   * feature extraction outside of the context of the Web Audio API, and must be\n   * set accurately - otherwise calculations will be off.\n   */\n  sampleRate: number;\n  /**\n   * The number of Mel bands to use in the Mel Frequency Cepstral Co-efficients\n   * feature extractor\n   */\n  melBands: number;\n  /**\n   * The number of bands to divide the spectrum into for the Chroma feature\n   * extractor. 12 is the standard number of semitones per octave in the western\n   * music tradition, but Meyda can use an arbitrary number of bands, which\n   * can be useful for microtonal music.\n   */\n  chromaBands: number;\n  /**\n   * A function you can provide that will be called for each buffer that Meyda\n   * receives from its source node\n   * @hidden\n   */\n  callback: ((features: Partial<MeydaFeaturesObject>) => void | null) | null;\n  /**\n   * Specify the windowing function to apply to the buffer before the\n   * transformation from the time domain to the frequency domain is performed\n   *\n   * The default windowing function is the hanning window.\n   */\n  windowingFunction: string;\n  featureExtractors: any;\n  /** @hidden */\n  EXTRACTION_STARTED: boolean;\n  /**\n   * The number of MFCC co-efficients that the MFCC feature extractor should return\n   */\n  numberOfMFCCCoefficients: number;\n  /**\n   * The number of bark bands that the loudness feature extractor should return\n   */\n  numberOfBarkBands: number;\n  /** @hidden */\n  _featuresToExtract: string[];\n  /**\n   * Apply a windowing function to a signal\n   */\n  windowing: (\n    signal: MeydaSignal,\n    windowname?: MeydaWindowingFunction\n  ) => MeydaSignal;\n  /** @hidden */\n  _errors: { [key: string]: Error };\n  /**\n   * @summary\n   * Create a MeydaAnalyzer\n   *\n   * A factory function for creating a MeydaAnalyzer, the interface for using\n   * Meyda in the context of Web Audio.\n   *\n   * @example\n   * ```javascript\n   * const analyzer = Meyda.createMeydaAnalyzer({\n   *   \"audioContext\": audioContext,\n   *   \"source\": source,\n   *   \"bufferSize\": 512,\n   *   \"featureExtractors\": [\"rms\"],\n   *   \"inputs\": 2,\n   *   \"callback\": features => {\n   *     levelRangeElement.value = features.rms;\n   *   }\n   * });\n   * ```\n   */\n  createMeydaAnalyzer: (MeydaAnalyzerOptions) => MeydaAnalyzer;\n  /**\n   * List available audio feature extractors. Return format provides the key to\n   * be used in selecting the extractor in the extract methods\n   */\n  listAvailableFeatureExtractors: () => MeydaAudioFeature[];\n  /**\n   * Extract an audio feature from a buffer\n   *\n   * Unless `meyda.windowingFunction` is set otherwise, `extract` will\n   * internally apply a hanning window to the buffer prior to conversion into\n   * the frequency domain.\n   *\n   * @param {(string|Array.<string>)} feature - the feature you want to extract\n   * @param {Array.<number>} signal\n   * An array of numbers that represents the signal. It should be of length\n   * `meyda.bufferSize`\n   * @param {Array.<number>} [previousSignal] - the previous buffer\n   * @returns {object} Features\n   * @example\n   * ```javascript\n   * meyda.bufferSize = 2048;\n   * const features = meyda.extract(['zcr', 'spectralCentroid'], signal);\n   * ```\n   *\n   * Aside: yes, you need to modify the value of a field of the default export\n   * of the package to change the buffer size. We realise this now seems not\n   * a good practice. See [this issue](https://github.com/meyda/meyda/issues/257)\n   * to track our progress on implementing a more modern API.\n   */\n  extract: (\n    feature: MeydaAudioFeature | MeydaAudioFeature[],\n    signal: MeydaSignal,\n    previousSignal?: MeydaSignal\n  ) => Partial<MeydaFeaturesObject> | null;\n}\n\nconst Meyda: Meyda = {\n  audioContext: null,\n  spn: null,\n  bufferSize: 512,\n  sampleRate: 44100,\n  melBands: 26,\n  chromaBands: 12,\n  callback: null,\n  windowingFunction: \"hanning\",\n  featureExtractors: extractors,\n  EXTRACTION_STARTED: false,\n  numberOfMFCCCoefficients: 13,\n  numberOfBarkBands: 24,\n  _featuresToExtract: [],\n  windowing: utilities.applyWindow,\n  /** @hidden */\n  _errors: {\n    notPow2: new Error(\n      \"Meyda: Buffer size must be a power of 2, e.g. 64 or 512\"\n    ),\n    featureUndef: new Error(\"Meyda: No features defined.\"),\n    invalidFeatureFmt: new Error(\"Meyda: Invalid feature format\"),\n    invalidInput: new Error(\"Meyda: Invalid input.\"),\n    noAC: new Error(\"Meyda: No AudioContext specified.\"),\n    noSource: new Error(\"Meyda: No source node specified.\"),\n  },\n\n  /**\n   * @summary\n   * Create a MeydaAnalyzer\n   *\n   * A factory function for creating a MeydaAnalyzer, the interface for using\n   * Meyda in the context of Web Audio.\n   *\n   * ```javascript\n   * const analyzer = Meyda.createMeydaAnalyzer({\n   *   \"audioContext\": audioContext,\n   *   \"source\": source,\n   *   \"bufferSize\": 512,\n   *   \"featureExtractors\": [\"rms\"],\n   *   \"inputs\": 2,\n   *   \"callback\": features => {\n   *     levelRangeElement.value = features.rms;\n   *   }\n   * });\n   * ```\n   */\n  createMeydaAnalyzer,\n  /**\n   * List available audio feature extractors. Return format provides the key to\n   * be used in selecting the extractor in the extract methods\n   */\n  listAvailableFeatureExtractors,\n  /**\n   * Extract an audio feature from a buffer\n   *\n   * Unless `meyda.windowingFunction` is set otherwise, `extract` will\n   * internally apply a hanning window to the buffer prior to conversion into\n   * the frequency domain.\n   *\n   * ```javascript\n   * meyda.bufferSize = 2048;\n   * const features = meyda.extract(['zcr', 'spectralCentroid'], signal);\n   * ```\n   */\n  extract: function (feature, signal, previousSignal) {\n    if (!signal) throw this._errors.invalidInput;\n    else if (typeof signal != \"object\") throw this._errors.invalidInput;\n    else if (!feature) throw this._errors.featureUndef;\n    else if (!utilities.isPowerOfTwo(signal.length)) throw this._errors.notPow2;\n\n    if (\n      typeof this.barkScale == \"undefined\" ||\n      this.barkScale.length != this.bufferSize\n    ) {\n      this.barkScale = utilities.createBarkScale(\n        this.bufferSize,\n        this.sampleRate,\n        this.bufferSize\n      );\n    }\n\n    // Recalculate mel bank if buffer length changed\n    if (\n      typeof this.melFilterBank == \"undefined\" ||\n      this.barkScale.length != this.bufferSize ||\n      this.melFilterBank.length != this.melBands\n    ) {\n      this.melFilterBank = utilities.createMelFilterBank(\n        Math.max(this.melBands, this.numberOfMFCCCoefficients),\n        this.sampleRate,\n        this.bufferSize\n      );\n    }\n\n    // Recalculate chroma bank if buffer length changed\n    if (\n      typeof this.chromaFilterBank == \"undefined\" ||\n      this.chromaFilterBank.length != this.chromaBands\n    ) {\n      this.chromaFilterBank = utilities.createChromaFilterBank(\n        this.chromaBands,\n        this.sampleRate,\n        this.bufferSize\n      );\n    }\n\n    if (\"buffer\" in signal && typeof signal.buffer == \"undefined\") {\n      //signal is a normal array, convert to F32A\n      this.signal = utilities.arrayToTyped(signal);\n    } else {\n      this.signal = signal;\n    }\n\n    let preparedSignal = prepareSignalWithSpectrum(\n      signal,\n      this.windowingFunction,\n      this.bufferSize\n    );\n\n    this.signal = preparedSignal.windowedSignal;\n    this.complexSpectrum = preparedSignal.complexSpectrum;\n    this.ampSpectrum = preparedSignal.ampSpectrum;\n\n    if (previousSignal) {\n      let preparedSignal = prepareSignalWithSpectrum(\n        previousSignal,\n        this.windowingFunction,\n        this.bufferSize\n      );\n\n      this.previousSignal = preparedSignal.windowedSignal;\n      this.previousComplexSpectrum = preparedSignal.complexSpectrum;\n      this.previousAmpSpectrum = preparedSignal.ampSpectrum;\n    }\n\n    const extract = (feature) => {\n      return this.featureExtractors[feature]({\n        ampSpectrum: this.ampSpectrum,\n        chromaFilterBank: this.chromaFilterBank,\n        complexSpectrum: this.complexSpectrum,\n        signal: this.signal,\n        bufferSize: this.bufferSize,\n        sampleRate: this.sampleRate,\n        barkScale: this.barkScale,\n        melFilterBank: this.melFilterBank,\n        previousSignal: this.previousSignal,\n        previousAmpSpectrum: this.previousAmpSpectrum,\n        previousComplexSpectrum: this.previousComplexSpectrum,\n        numberOfMFCCCoefficients: this.numberOfMFCCCoefficients,\n        numberOfBarkBands: this.numberOfBarkBands,\n      });\n    };\n\n    if (typeof feature === \"object\") {\n      return feature.reduce(\n        (acc, el) =>\n          Object.assign({}, acc, {\n            [el]: extract(el),\n          }),\n        {}\n      );\n    } else if (typeof feature === \"string\") {\n      return extract(feature);\n    } else {\n      throw this._errors.invalidFeatureFmt;\n    }\n  },\n};\n\nvar prepareSignalWithSpectrum = function (\n  signal,\n  windowingFunction,\n  bufferSize\n) {\n  var preparedSignal: any = {};\n\n  if (typeof signal.buffer == \"undefined\") {\n    //signal is a normal array, convert to F32A\n    preparedSignal.signal = utilities.arrayToTyped(signal);\n  } else {\n    preparedSignal.signal = signal;\n  }\n\n  preparedSignal.windowedSignal = utilities.applyWindow(\n    preparedSignal.signal,\n    windowingFunction\n  );\n\n  preparedSignal.complexSpectrum = fft(preparedSignal.windowedSignal);\n  preparedSignal.ampSpectrum = new Float32Array(bufferSize / 2);\n  for (var i = 0; i < bufferSize / 2; i++) {\n    preparedSignal.ampSpectrum[i] = Math.sqrt(\n      Math.pow(preparedSignal.complexSpectrum.real[i], 2) +\n        Math.pow(preparedSignal.complexSpectrum.imag[i], 2)\n    );\n  }\n\n  return preparedSignal;\n};\n\nexport default Meyda;\n\n/**\n * List available audio feature extractors. Return format provides the key to\n * be used in selecting the extractor in the extract methods\n */\nfunction listAvailableFeatureExtractors(): MeydaAudioFeature[] {\n  return Object.keys(this.featureExtractors) as MeydaAudioFeature[];\n}\n\n/**\n * Create a MeydaAnalyzer\n *\n * A factory function for creating a MeydaAnalyzer, the interface for using\n * Meyda in the context of Web Audio.\n *\n * ```javascript\n * const analyzer = Meyda.createMeydaAnalyzer({\n *   \"audioContext\": audioContext,\n *   \"source\": source,\n *   \"bufferSize\": 512,\n *   \"featureExtractors\": [\"rms\"],\n *   \"inputs\": 2,\n *   \"callback\": features => {\n *     levelRangeElement.value = features.rms;\n *   }\n * });\n * ```\n */\nfunction createMeydaAnalyzer(options) {\n  return new MeydaAnalyzer(options, Object.assign({}, Meyda));\n}\n\n/**\n * Apply a windowing function to a signal\n */\nfunction windowing(\n  signal: MeydaSignal,\n  windowname: MeydaWindowingFunction\n): MeydaSignal {\n  return utilities.applyWindow(signal, windowname);\n}\n\n// @ts-ignore\nif (typeof window !== \"undefined\") window.Meyda = Meyda;\n", "(function (global, factory) {\n    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :\n    typeof define === 'function' && define.amd ? define(factory) :\n    (global.createREGL = factory());\n}(this, (function () { 'use strict';\n\nvar isTypedArray = function (x) {\n  return (\n    x instanceof Uint8Array ||\n    x instanceof Uint16Array ||\n    x instanceof Uint32Array ||\n    x instanceof Int8Array ||\n    x instanceof Int16Array ||\n    x instanceof Int32Array ||\n    x instanceof Float32Array ||\n    x instanceof Float64Array ||\n    x instanceof Uint8ClampedArray\n  )\n}\n\nvar extend = function (base, opts) {\n  var keys = Object.keys(opts)\n  for (var i = 0; i < keys.length; ++i) {\n    base[keys[i]] = opts[keys[i]]\n  }\n  return base\n}\n\n// Error checking and parameter validation.\n//\n// Statements for the form `check.someProcedure(...)` get removed by\n// a browserify transform for optimized/minified bundles.\n//\n/* globals atob */\nvar endl = '\\n'\n\n// only used for extracting shader names.  if atob not present, then errors\n// will be slightly crappier\nfunction decodeB64 (str) {\n  if (typeof atob !== 'undefined') {\n    return atob(str)\n  }\n  return 'base64:' + str\n}\n\nfunction raise (message) {\n  var error = new Error('(regl) ' + message)\n  console.error(error)\n  throw error\n}\n\nfunction check (pred, message) {\n  if (!pred) {\n    raise(message)\n  }\n}\n\nfunction encolon (message) {\n  if (message) {\n    return ': ' + message\n  }\n  return ''\n}\n\nfunction checkParameter (param, possibilities, message) {\n  if (!(param in possibilities)) {\n    raise('unknown parameter (' + param + ')' + encolon(message) +\n          '. possible values: ' + Object.keys(possibilities).join())\n  }\n}\n\nfunction checkIsTypedArray (data, message) {\n  if (!isTypedArray(data)) {\n    raise(\n      'invalid parameter type' + encolon(message) +\n      '. must be a typed array')\n  }\n}\n\nfunction standardTypeEh (value, type) {\n  switch (type) {\n    case 'number': return typeof value === 'number'\n    case 'object': return typeof value === 'object'\n    case 'string': return typeof value === 'string'\n    case 'boolean': return typeof value === 'boolean'\n    case 'function': return typeof value === 'function'\n    case 'undefined': return typeof value === 'undefined'\n    case 'symbol': return typeof value === 'symbol'\n  }\n}\n\nfunction checkTypeOf (value, type, message) {\n  if (!standardTypeEh(value, type)) {\n    raise(\n      'invalid parameter type' + encolon(message) +\n      '. expected ' + type + ', got ' + (typeof value))\n  }\n}\n\nfunction checkNonNegativeInt (value, message) {\n  if (!((value >= 0) &&\n        ((value | 0) === value))) {\n    raise('invalid parameter type, (' + value + ')' + encolon(message) +\n          '. must be a nonnegative integer')\n  }\n}\n\nfunction checkOneOf (value, list, message) {\n  if (list.indexOf(value) < 0) {\n    raise('invalid value' + encolon(message) + '. must be one of: ' + list)\n  }\n}\n\nvar constructorKeys = [\n  'gl',\n  'canvas',\n  'container',\n  'attributes',\n  'pixelRatio',\n  'extensions',\n  'optionalExtensions',\n  'profile',\n  'onDone'\n]\n\nfunction checkConstructor (obj) {\n  Object.keys(obj).forEach(function (key) {\n    if (constructorKeys.indexOf(key) < 0) {\n      raise('invalid regl constructor argument \"' + key + '\". must be one of ' + constructorKeys)\n    }\n  })\n}\n\nfunction leftPad (str, n) {\n  str = str + ''\n  while (str.length < n) {\n    str = ' ' + str\n  }\n  return str\n}\n\nfunction ShaderFile () {\n  this.name = 'unknown'\n  this.lines = []\n  this.index = {}\n  this.hasErrors = false\n}\n\nfunction ShaderLine (number, line) {\n  this.number = number\n  this.line = line\n  this.errors = []\n}\n\nfunction ShaderError (fileNumber, lineNumber, message) {\n  this.file = fileNumber\n  this.line = lineNumber\n  this.message = message\n}\n\nfunction guessCommand () {\n  var error = new Error()\n  var stack = (error.stack || error).toString()\n  var pat = /compileProcedure.*\\n\\s*at.*\\((.*)\\)/.exec(stack)\n  if (pat) {\n    return pat[1]\n  }\n  var pat2 = /compileProcedure.*\\n\\s*at\\s+(.*)(\\n|$)/.exec(stack)\n  if (pat2) {\n    return pat2[1]\n  }\n  return 'unknown'\n}\n\nfunction guessCallSite () {\n  var error = new Error()\n  var stack = (error.stack || error).toString()\n  var pat = /at REGLCommand.*\\n\\s+at.*\\((.*)\\)/.exec(stack)\n  if (pat) {\n    return pat[1]\n  }\n  var pat2 = /at REGLCommand.*\\n\\s+at\\s+(.*)\\n/.exec(stack)\n  if (pat2) {\n    return pat2[1]\n  }\n  return 'unknown'\n}\n\nfunction parseSource (source, command) {\n  var lines = source.split('\\n')\n  var lineNumber = 1\n  var fileNumber = 0\n  var files = {\n    unknown: new ShaderFile(),\n    0: new ShaderFile()\n  }\n  files.unknown.name = files[0].name = command || guessCommand()\n  files.unknown.lines.push(new ShaderLine(0, ''))\n  for (var i = 0; i < lines.length; ++i) {\n    var line = lines[i]\n    var parts = /^\\s*#\\s*(\\w+)\\s+(.+)\\s*$/.exec(line)\n    if (parts) {\n      switch (parts[1]) {\n        case 'line':\n          var lineNumberInfo = /(\\d+)(\\s+\\d+)?/.exec(parts[2])\n          if (lineNumberInfo) {\n            lineNumber = lineNumberInfo[1] | 0\n            if (lineNumberInfo[2]) {\n              fileNumber = lineNumberInfo[2] | 0\n              if (!(fileNumber in files)) {\n                files[fileNumber] = new ShaderFile()\n              }\n            }\n          }\n          break\n        case 'define':\n          var nameInfo = /SHADER_NAME(_B64)?\\s+(.*)$/.exec(parts[2])\n          if (nameInfo) {\n            files[fileNumber].name = (nameInfo[1]\n              ? decodeB64(nameInfo[2])\n              : nameInfo[2])\n          }\n          break\n      }\n    }\n    files[fileNumber].lines.push(new ShaderLine(lineNumber++, line))\n  }\n  Object.keys(files).forEach(function (fileNumber) {\n    var file = files[fileNumber]\n    file.lines.forEach(function (line) {\n      file.index[line.number] = line\n    })\n  })\n  return files\n}\n\nfunction parseErrorLog (errLog) {\n  var result = []\n  errLog.split('\\n').forEach(function (errMsg) {\n    if (errMsg.length < 5) {\n      return\n    }\n    var parts = /^ERROR:\\s+(\\d+):(\\d+):\\s*(.*)$/.exec(errMsg)\n    if (parts) {\n      result.push(new ShaderError(\n        parts[1] | 0,\n        parts[2] | 0,\n        parts[3].trim()))\n    } else if (errMsg.length > 0) {\n      result.push(new ShaderError('unknown', 0, errMsg))\n    }\n  })\n  return result\n}\n\nfunction annotateFiles (files, errors) {\n  errors.forEach(function (error) {\n    var file = files[error.file]\n    if (file) {\n      var line = file.index[error.line]\n      if (line) {\n        line.errors.push(error)\n        file.hasErrors = true\n        return\n      }\n    }\n    files.unknown.hasErrors = true\n    files.unknown.lines[0].errors.push(error)\n  })\n}\n\nfunction checkShaderError (gl, shader, source, type, command) {\n  if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {\n    var errLog = gl.getShaderInfoLog(shader)\n    var typeName = type === gl.FRAGMENT_SHADER ? 'fragment' : 'vertex'\n    checkCommandType(source, 'string', typeName + ' shader source must be a string', command)\n    var files = parseSource(source, command)\n    var errors = parseErrorLog(errLog)\n    annotateFiles(files, errors)\n\n    Object.keys(files).forEach(function (fileNumber) {\n      var file = files[fileNumber]\n      if (!file.hasErrors) {\n        return\n      }\n\n      var strings = ['']\n      var styles = ['']\n\n      function push (str, style) {\n        strings.push(str)\n        styles.push(style || '')\n      }\n\n      push('file number ' + fileNumber + ': ' + file.name + '\\n', 'color:red;text-decoration:underline;font-weight:bold')\n\n      file.lines.forEach(function (line) {\n        if (line.errors.length > 0) {\n          push(leftPad(line.number, 4) + '|  ', 'background-color:yellow; font-weight:bold')\n          push(line.line + endl, 'color:red; background-color:yellow; font-weight:bold')\n\n          // try to guess token\n          var offset = 0\n          line.errors.forEach(function (error) {\n            var message = error.message\n            var token = /^\\s*'(.*)'\\s*:\\s*(.*)$/.exec(message)\n            if (token) {\n              var tokenPat = token[1]\n              message = token[2]\n              switch (tokenPat) {\n                case 'assign':\n                  tokenPat = '='\n                  break\n              }\n              offset = Math.max(line.line.indexOf(tokenPat, offset), 0)\n            } else {\n              offset = 0\n            }\n\n            push(leftPad('| ', 6))\n            push(leftPad('^^^', offset + 3) + endl, 'font-weight:bold')\n            push(leftPad('| ', 6))\n            push(message + endl, 'font-weight:bold')\n          })\n          push(leftPad('| ', 6) + endl)\n        } else {\n          push(leftPad(line.number, 4) + '|  ')\n          push(line.line + endl, 'color:red')\n        }\n      })\n      if (typeof document !== 'undefined' && !window.chrome) {\n        styles[0] = strings.join('%c')\n        console.log.apply(console, styles)\n      } else {\n        console.log(strings.join(''))\n      }\n    })\n\n    check.raise('Error compiling ' + typeName + ' shader, ' + files[0].name)\n  }\n}\n\nfunction checkLinkError (gl, program, fragShader, vertShader, command) {\n  if (!gl.getProgramParameter(program, gl.LINK_STATUS)) {\n    var errLog = gl.getProgramInfoLog(program)\n    var fragParse = parseSource(fragShader, command)\n    var vertParse = parseSource(vertShader, command)\n\n    var header = 'Error linking program with vertex shader, \"' +\n      vertParse[0].name + '\", and fragment shader \"' + fragParse[0].name + '\"'\n\n    if (typeof document !== 'undefined') {\n      console.log('%c' + header + endl + '%c' + errLog,\n        'color:red;text-decoration:underline;font-weight:bold',\n        'color:red')\n    } else {\n      console.log(header + endl + errLog)\n    }\n    check.raise(header)\n  }\n}\n\nfunction saveCommandRef (object) {\n  object._commandRef = guessCommand()\n}\n\nfunction saveDrawCommandInfo (opts, uniforms, attributes, stringStore) {\n  saveCommandRef(opts)\n\n  function id (str) {\n    if (str) {\n      return stringStore.id(str)\n    }\n    return 0\n  }\n  opts._fragId = id(opts.static.frag)\n  opts._vertId = id(opts.static.vert)\n\n  function addProps (dict, set) {\n    Object.keys(set).forEach(function (u) {\n      dict[stringStore.id(u)] = true\n    })\n  }\n\n  var uniformSet = opts._uniformSet = {}\n  addProps(uniformSet, uniforms.static)\n  addProps(uniformSet, uniforms.dynamic)\n\n  var attributeSet = opts._attributeSet = {}\n  addProps(attributeSet, attributes.static)\n  addProps(attributeSet, attributes.dynamic)\n\n  opts._hasCount = (\n    'count' in opts.static ||\n    'count' in opts.dynamic ||\n    'elements' in opts.static ||\n    'elements' in opts.dynamic)\n}\n\nfunction commandRaise (message, command) {\n  var callSite = guessCallSite()\n  raise(message +\n    ' in command ' + (command || guessCommand()) +\n    (callSite === 'unknown' ? '' : ' called from ' + callSite))\n}\n\nfunction checkCommand (pred, message, command) {\n  if (!pred) {\n    commandRaise(message, command || guessCommand())\n  }\n}\n\nfunction checkParameterCommand (param, possibilities, message, command) {\n  if (!(param in possibilities)) {\n    commandRaise(\n      'unknown parameter (' + param + ')' + encolon(message) +\n      '. possible values: ' + Object.keys(possibilities).join(),\n      command || guessCommand())\n  }\n}\n\nfunction checkCommandType (value, type, message, command) {\n  if (!standardTypeEh(value, type)) {\n    commandRaise(\n      'invalid parameter type' + encolon(message) +\n      '. expected ' + type + ', got ' + (typeof value),\n      command || guessCommand())\n  }\n}\n\nfunction checkOptional (block) {\n  block()\n}\n\nfunction checkFramebufferFormat (attachment, texFormats, rbFormats) {\n  if (attachment.texture) {\n    checkOneOf(\n      attachment.texture._texture.internalformat,\n      texFormats,\n      'unsupported texture format for attachment')\n  } else {\n    checkOneOf(\n      attachment.renderbuffer._renderbuffer.format,\n      rbFormats,\n      'unsupported renderbuffer format for attachment')\n  }\n}\n\nvar GL_CLAMP_TO_EDGE = 0x812F\n\nvar GL_NEAREST = 0x2600\nvar GL_NEAREST_MIPMAP_NEAREST = 0x2700\nvar GL_LINEAR_MIPMAP_NEAREST = 0x2701\nvar GL_NEAREST_MIPMAP_LINEAR = 0x2702\nvar GL_LINEAR_MIPMAP_LINEAR = 0x2703\n\nvar GL_BYTE = 5120\nvar GL_UNSIGNED_BYTE = 5121\nvar GL_SHORT = 5122\nvar GL_UNSIGNED_SHORT = 5123\nvar GL_INT = 5124\nvar GL_UNSIGNED_INT = 5125\nvar GL_FLOAT = 5126\n\nvar GL_UNSIGNED_SHORT_4_4_4_4 = 0x8033\nvar GL_UNSIGNED_SHORT_5_5_5_1 = 0x8034\nvar GL_UNSIGNED_SHORT_5_6_5 = 0x8363\nvar GL_UNSIGNED_INT_24_8_WEBGL = 0x84FA\n\nvar GL_HALF_FLOAT_OES = 0x8D61\n\nvar TYPE_SIZE = {}\n\nTYPE_SIZE[GL_BYTE] =\nTYPE_SIZE[GL_UNSIGNED_BYTE] = 1\n\nTYPE_SIZE[GL_SHORT] =\nTYPE_SIZE[GL_UNSIGNED_SHORT] =\nTYPE_SIZE[GL_HALF_FLOAT_OES] =\nTYPE_SIZE[GL_UNSIGNED_SHORT_5_6_5] =\nTYPE_SIZE[GL_UNSIGNED_SHORT_4_4_4_4] =\nTYPE_SIZE[GL_UNSIGNED_SHORT_5_5_5_1] = 2\n\nTYPE_SIZE[GL_INT] =\nTYPE_SIZE[GL_UNSIGNED_INT] =\nTYPE_SIZE[GL_FLOAT] =\nTYPE_SIZE[GL_UNSIGNED_INT_24_8_WEBGL] = 4\n\nfunction pixelSize (type, channels) {\n  if (type === GL_UNSIGNED_SHORT_5_5_5_1 ||\n      type === GL_UNSIGNED_SHORT_4_4_4_4 ||\n      type === GL_UNSIGNED_SHORT_5_6_5) {\n    return 2\n  } else if (type === GL_UNSIGNED_INT_24_8_WEBGL) {\n    return 4\n  } else {\n    return TYPE_SIZE[type] * channels\n  }\n}\n\nfunction isPow2 (v) {\n  return !(v & (v - 1)) && (!!v)\n}\n\nfunction checkTexture2D (info, mipData, limits) {\n  var i\n  var w = mipData.width\n  var h = mipData.height\n  var c = mipData.channels\n\n  // Check texture shape\n  check(w > 0 && w <= limits.maxTextureSize &&\n        h > 0 && h <= limits.maxTextureSize,\n  'invalid texture shape')\n\n  // check wrap mode\n  if (info.wrapS !== GL_CLAMP_TO_EDGE || info.wrapT !== GL_CLAMP_TO_EDGE) {\n    check(isPow2(w) && isPow2(h),\n      'incompatible wrap mode for texture, both width and height must be power of 2')\n  }\n\n  if (mipData.mipmask === 1) {\n    if (w !== 1 && h !== 1) {\n      check(\n        info.minFilter !== GL_NEAREST_MIPMAP_NEAREST &&\n        info.minFilter !== GL_NEAREST_MIPMAP_LINEAR &&\n        info.minFilter !== GL_LINEAR_MIPMAP_NEAREST &&\n        info.minFilter !== GL_LINEAR_MIPMAP_LINEAR,\n        'min filter requires mipmap')\n    }\n  } else {\n    // texture must be power of 2\n    check(isPow2(w) && isPow2(h),\n      'texture must be a square power of 2 to support mipmapping')\n    check(mipData.mipmask === (w << 1) - 1,\n      'missing or incomplete mipmap data')\n  }\n\n  if (mipData.type === GL_FLOAT) {\n    if (limits.extensions.indexOf('oes_texture_float_linear') < 0) {\n      check(info.minFilter === GL_NEAREST && info.magFilter === GL_NEAREST,\n        'filter not supported, must enable oes_texture_float_linear')\n    }\n    check(!info.genMipmaps,\n      'mipmap generation not supported with float textures')\n  }\n\n  // check image complete\n  var mipimages = mipData.images\n  for (i = 0; i < 16; ++i) {\n    if (mipimages[i]) {\n      var mw = w >> i\n      var mh = h >> i\n      check(mipData.mipmask & (1 << i), 'missing mipmap data')\n\n      var img = mipimages[i]\n\n      check(\n        img.width === mw &&\n        img.height === mh,\n        'invalid shape for mip images')\n\n      check(\n        img.format === mipData.format &&\n        img.internalformat === mipData.internalformat &&\n        img.type === mipData.type,\n        'incompatible type for mip image')\n\n      if (img.compressed) {\n        // TODO: check size for compressed images\n      } else if (img.data) {\n        // check(img.data.byteLength === mw * mh *\n        // Math.max(pixelSize(img.type, c), img.unpackAlignment),\n        var rowSize = Math.ceil(pixelSize(img.type, c) * mw / img.unpackAlignment) * img.unpackAlignment\n        check(img.data.byteLength === rowSize * mh,\n          'invalid data for image, buffer size is inconsistent with image format')\n      } else if (img.element) {\n        // TODO: check element can be loaded\n      } else if (img.copy) {\n        // TODO: check compatible format and type\n      }\n    } else if (!info.genMipmaps) {\n      check((mipData.mipmask & (1 << i)) === 0, 'extra mipmap data')\n    }\n  }\n\n  if (mipData.compressed) {\n    check(!info.genMipmaps,\n      'mipmap generation for compressed images not supported')\n  }\n}\n\nfunction checkTextureCube (texture, info, faces, limits) {\n  var w = texture.width\n  var h = texture.height\n  var c = texture.channels\n\n  // Check texture shape\n  check(\n    w > 0 && w <= limits.maxTextureSize && h > 0 && h <= limits.maxTextureSize,\n    'invalid texture shape')\n  check(\n    w === h,\n    'cube map must be square')\n  check(\n    info.wrapS === GL_CLAMP_TO_EDGE && info.wrapT === GL_CLAMP_TO_EDGE,\n    'wrap mode not supported by cube map')\n\n  for (var i = 0; i < faces.length; ++i) {\n    var face = faces[i]\n    check(\n      face.width === w && face.height === h,\n      'inconsistent cube map face shape')\n\n    if (info.genMipmaps) {\n      check(!face.compressed,\n        'can not generate mipmap for compressed textures')\n      check(face.mipmask === 1,\n        'can not specify mipmaps and generate mipmaps')\n    } else {\n      // TODO: check mip and filter mode\n    }\n\n    var mipmaps = face.images\n    for (var j = 0; j < 16; ++j) {\n      var img = mipmaps[j]\n      if (img) {\n        var mw = w >> j\n        var mh = h >> j\n        check(face.mipmask & (1 << j), 'missing mipmap data')\n        check(\n          img.width === mw &&\n          img.height === mh,\n          'invalid shape for mip images')\n        check(\n          img.format === texture.format &&\n          img.internalformat === texture.internalformat &&\n          img.type === texture.type,\n          'incompatible type for mip image')\n\n        if (img.compressed) {\n          // TODO: check size for compressed images\n        } else if (img.data) {\n          check(img.data.byteLength === mw * mh *\n            Math.max(pixelSize(img.type, c), img.unpackAlignment),\n          'invalid data for image, buffer size is inconsistent with image format')\n        } else if (img.element) {\n          // TODO: check element can be loaded\n        } else if (img.copy) {\n          // TODO: check compatible format and type\n        }\n      }\n    }\n  }\n}\n\nvar check$1 = extend(check, {\n  optional: checkOptional,\n  raise: raise,\n  commandRaise: commandRaise,\n  command: checkCommand,\n  parameter: checkParameter,\n  commandParameter: checkParameterCommand,\n  constructor: checkConstructor,\n  type: checkTypeOf,\n  commandType: checkCommandType,\n  isTypedArray: checkIsTypedArray,\n  nni: checkNonNegativeInt,\n  oneOf: checkOneOf,\n  shaderError: checkShaderError,\n  linkError: checkLinkError,\n  callSite: guessCallSite,\n  saveCommandRef: saveCommandRef,\n  saveDrawInfo: saveDrawCommandInfo,\n  framebufferFormat: checkFramebufferFormat,\n  guessCommand: guessCommand,\n  texture2D: checkTexture2D,\n  textureCube: checkTextureCube\n});\n\nvar VARIABLE_COUNTER = 0\n\nvar DYN_FUNC = 0\nvar DYN_CONSTANT = 5\nvar DYN_ARRAY = 6\n\nfunction DynamicVariable (type, data) {\n  this.id = (VARIABLE_COUNTER++)\n  this.type = type\n  this.data = data\n}\n\nfunction escapeStr (str) {\n  return str.replace(/\\\\/g, '\\\\\\\\').replace(/\"/g, '\\\\\"')\n}\n\nfunction splitParts (str) {\n  if (str.length === 0) {\n    return []\n  }\n\n  var firstChar = str.charAt(0)\n  var lastChar = str.charAt(str.length - 1)\n\n  if (str.length > 1 &&\n      firstChar === lastChar &&\n      (firstChar === '\"' || firstChar === \"'\")) {\n    return ['\"' + escapeStr(str.substr(1, str.length - 2)) + '\"']\n  }\n\n  var parts = /\\[(false|true|null|\\d+|'[^']*'|\"[^\"]*\")\\]/.exec(str)\n  if (parts) {\n    return (\n      splitParts(str.substr(0, parts.index))\n        .concat(splitParts(parts[1]))\n        .concat(splitParts(str.substr(parts.index + parts[0].length)))\n    )\n  }\n\n  var subparts = str.split('.')\n  if (subparts.length === 1) {\n    return ['\"' + escapeStr(str) + '\"']\n  }\n\n  var result = []\n  for (var i = 0; i < subparts.length; ++i) {\n    result = result.concat(splitParts(subparts[i]))\n  }\n  return result\n}\n\nfunction toAccessorString (str) {\n  return '[' + splitParts(str).join('][') + ']'\n}\n\nfunction defineDynamic (type, data) {\n  return new DynamicVariable(type, toAccessorString(data + ''))\n}\n\nfunction isDynamic (x) {\n  return (typeof x === 'function' && !x._reglType) || (x instanceof DynamicVariable)\n}\n\nfunction unbox (x, path) {\n  if (typeof x === 'function') {\n    return new DynamicVariable(DYN_FUNC, x)\n  } else if (typeof x === 'number' || typeof x === 'boolean') {\n    return new DynamicVariable(DYN_CONSTANT, x)\n  } else if (Array.isArray(x)) {\n    return new DynamicVariable(DYN_ARRAY, x.map((y, i) => unbox(y, path + '[' + i + ']')))\n  } else if (x instanceof DynamicVariable) {\n    return x\n  }\n  check$1(false, 'invalid option type in uniform ' + path)\n}\n\nvar dynamic = {\n  DynamicVariable: DynamicVariable,\n  define: defineDynamic,\n  isDynamic: isDynamic,\n  unbox: unbox,\n  accessor: toAccessorString\n};\n\n/* globals requestAnimationFrame, cancelAnimationFrame */\nvar raf = {\n  next: typeof requestAnimationFrame === 'function'\n    ? function (cb) { return requestAnimationFrame(cb) }\n    : function (cb) { return setTimeout(cb, 16) },\n  cancel: typeof cancelAnimationFrame === 'function'\n    ? function (raf) { return cancelAnimationFrame(raf) }\n    : clearTimeout\n};\n\n/* globals performance */\nvar clock = (typeof performance !== 'undefined' && performance.now)\n    ? function () { return performance.now() }\n    : function () { return +(new Date()) };\n\nfunction createStringStore () {\n  var stringIds = { '': 0 }\n  var stringValues = ['']\n  return {\n    id: function (str) {\n      var result = stringIds[str]\n      if (result) {\n        return result\n      }\n      result = stringIds[str] = stringValues.length\n      stringValues.push(str)\n      return result\n    },\n\n    str: function (id) {\n      return stringValues[id]\n    }\n  }\n}\n\n// Context and canvas creation helper functions\nfunction createCanvas (element, onDone, pixelRatio) {\n  var canvas = document.createElement('canvas')\n  extend(canvas.style, {\n    border: 0,\n    margin: 0,\n    padding: 0,\n    top: 0,\n    left: 0\n  })\n  element.appendChild(canvas)\n\n  if (element === document.body) {\n    canvas.style.position = 'absolute'\n    extend(element.style, {\n      margin: 0,\n      padding: 0\n    })\n  }\n\n  function resize () {\n    var w = window.innerWidth\n    var h = window.innerHeight\n    if (element !== document.body) {\n      var bounds = element.getBoundingClientRect()\n      w = bounds.right - bounds.left\n      h = bounds.bottom - bounds.top\n    }\n    canvas.width = pixelRatio * w\n    canvas.height = pixelRatio * h\n    extend(canvas.style, {\n      width: w + 'px',\n      height: h + 'px'\n    })\n  }\n\n  var resizeObserver\n  if (element !== document.body && typeof ResizeObserver === 'function') {\n    // ignore 'ResizeObserver' is not defined\n    // eslint-disable-next-line\n    resizeObserver = new ResizeObserver(function () {\n      // setTimeout to avoid flicker\n      setTimeout(resize)\n    })\n    resizeObserver.observe(element)\n  } else {\n    window.addEventListener('resize', resize, false)\n  }\n\n  function onDestroy () {\n    if (resizeObserver) {\n      resizeObserver.disconnect()\n    } else {\n      window.removeEventListener('resize', resize)\n    }\n    element.removeChild(canvas)\n  }\n\n  resize()\n\n  return {\n    canvas: canvas,\n    onDestroy: onDestroy\n  }\n}\n\nfunction createContext (canvas, contextAttributes) {\n  function get (name) {\n    try {\n      return canvas.getContext(name, contextAttributes)\n    } catch (e) {\n      return null\n    }\n  }\n  return (\n    get('webgl') ||\n    get('experimental-webgl') ||\n    get('webgl-experimental')\n  )\n}\n\nfunction isHTMLElement (obj) {\n  return (\n    typeof obj.nodeName === 'string' &&\n    typeof obj.appendChild === 'function' &&\n    typeof obj.getBoundingClientRect === 'function'\n  )\n}\n\nfunction isWebGLContext (obj) {\n  return (\n    typeof obj.drawArrays === 'function' ||\n    typeof obj.drawElements === 'function'\n  )\n}\n\nfunction parseExtensions (input) {\n  if (typeof input === 'string') {\n    return input.split()\n  }\n  check$1(Array.isArray(input), 'invalid extension array')\n  return input\n}\n\nfunction getElement (desc) {\n  if (typeof desc === 'string') {\n    check$1(typeof document !== 'undefined', 'not supported outside of DOM')\n    return document.querySelector(desc)\n  }\n  return desc\n}\n\nfunction parseArgs (args_) {\n  var args = args_ || {}\n  var element, container, canvas, gl\n  var contextAttributes = {}\n  var extensions = []\n  var optionalExtensions = []\n  var pixelRatio = (typeof window === 'undefined' ? 1 : window.devicePixelRatio)\n  var profile = false\n  var onDone = function (err) {\n    if (err) {\n      check$1.raise(err)\n    }\n  }\n  var onDestroy = function () {}\n  if (typeof args === 'string') {\n    check$1(\n      typeof document !== 'undefined',\n      'selector queries only supported in DOM enviroments')\n    element = document.querySelector(args)\n    check$1(element, 'invalid query string for element')\n  } else if (typeof args === 'object') {\n    if (isHTMLElement(args)) {\n      element = args\n    } else if (isWebGLContext(args)) {\n      gl = args\n      canvas = gl.canvas\n    } else {\n      check$1.constructor(args)\n      if ('gl' in args) {\n        gl = args.gl\n      } else if ('canvas' in args) {\n        canvas = getElement(args.canvas)\n      } else if ('container' in args) {\n        container = getElement(args.container)\n      }\n      if ('attributes' in args) {\n        contextAttributes = args.attributes\n        check$1.type(contextAttributes, 'object', 'invalid context attributes')\n      }\n      if ('extensions' in args) {\n        extensions = parseExtensions(args.extensions)\n      }\n      if ('optionalExtensions' in args) {\n        optionalExtensions = parseExtensions(args.optionalExtensions)\n      }\n      if ('onDone' in args) {\n        check$1.type(\n          args.onDone, 'function',\n          'invalid or missing onDone callback')\n        onDone = args.onDone\n      }\n      if ('profile' in args) {\n        profile = !!args.profile\n      }\n      if ('pixelRatio' in args) {\n        pixelRatio = +args.pixelRatio\n        check$1(pixelRatio > 0, 'invalid pixel ratio')\n      }\n    }\n  } else {\n    check$1.raise('invalid arguments to regl')\n  }\n\n  if (element) {\n    if (element.nodeName.toLowerCase() === 'canvas') {\n      canvas = element\n    } else {\n      container = element\n    }\n  }\n\n  if (!gl) {\n    if (!canvas) {\n      check$1(\n        typeof document !== 'undefined',\n        'must manually specify webgl context outside of DOM environments')\n      var result = createCanvas(container || document.body, onDone, pixelRatio)\n      if (!result) {\n        return null\n      }\n      canvas = result.canvas\n      onDestroy = result.onDestroy\n    }\n    // workaround for chromium bug, premultiplied alpha value is platform dependent\n    if (contextAttributes.premultipliedAlpha === undefined) contextAttributes.premultipliedAlpha = true\n    gl = createContext(canvas, contextAttributes)\n  }\n\n  if (!gl) {\n    onDestroy()\n    onDone('webgl not supported, try upgrading your browser or graphics drivers http://get.webgl.org')\n    return null\n  }\n\n  return {\n    gl: gl,\n    canvas: canvas,\n    container: container,\n    extensions: extensions,\n    optionalExtensions: optionalExtensions,\n    pixelRatio: pixelRatio,\n    profile: profile,\n    onDone: onDone,\n    onDestroy: onDestroy\n  }\n}\n\nfunction createExtensionCache (gl, config) {\n  var extensions = {}\n\n  function tryLoadExtension (name_) {\n    check$1.type(name_, 'string', 'extension name must be string')\n    var name = name_.toLowerCase()\n    var ext\n    try {\n      ext = extensions[name] = gl.getExtension(name)\n    } catch (e) {}\n    return !!ext\n  }\n\n  for (var i = 0; i < config.extensions.length; ++i) {\n    var name = config.extensions[i]\n    if (!tryLoadExtension(name)) {\n      config.onDestroy()\n      config.onDone('\"' + name + '\" extension is not supported by the current WebGL context, try upgrading your system or a different browser')\n      return null\n    }\n  }\n\n  config.optionalExtensions.forEach(tryLoadExtension)\n\n  return {\n    extensions: extensions,\n    restore: function () {\n      Object.keys(extensions).forEach(function (name) {\n        if (extensions[name] && !tryLoadExtension(name)) {\n          throw new Error('(regl): error restoring extension ' + name)\n        }\n      })\n    }\n  }\n}\n\nfunction loop (n, f) {\n  var result = Array(n)\n  for (var i = 0; i < n; ++i) {\n    result[i] = f(i)\n  }\n  return result\n}\n\nvar GL_BYTE$1 = 5120\nvar GL_UNSIGNED_BYTE$2 = 5121\nvar GL_SHORT$1 = 5122\nvar GL_UNSIGNED_SHORT$1 = 5123\nvar GL_INT$1 = 5124\nvar GL_UNSIGNED_INT$1 = 5125\nvar GL_FLOAT$2 = 5126\n\nfunction nextPow16 (v) {\n  for (var i = 16; i <= (1 << 28); i *= 16) {\n    if (v <= i) {\n      return i\n    }\n  }\n  return 0\n}\n\nfunction log2 (v) {\n  var r, shift\n  r = (v > 0xFFFF) << 4\n  v >>>= r\n  shift = (v > 0xFF) << 3\n  v >>>= shift; r |= shift\n  shift = (v > 0xF) << 2\n  v >>>= shift; r |= shift\n  shift = (v > 0x3) << 1\n  v >>>= shift; r |= shift\n  return r | (v >> 1)\n}\n\nfunction createPool () {\n  var bufferPool = loop(8, function () {\n    return []\n  })\n\n  function alloc (n) {\n    var sz = nextPow16(n)\n    var bin = bufferPool[log2(sz) >> 2]\n    if (bin.length > 0) {\n      return bin.pop()\n    }\n    return new ArrayBuffer(sz)\n  }\n\n  function free (buf) {\n    bufferPool[log2(buf.byteLength) >> 2].push(buf)\n  }\n\n  function allocType (type, n) {\n    var result = null\n    switch (type) {\n      case GL_BYTE$1:\n        result = new Int8Array(alloc(n), 0, n)\n        break\n      case GL_UNSIGNED_BYTE$2:\n        result = new Uint8Array(alloc(n), 0, n)\n        break\n      case GL_SHORT$1:\n        result = new Int16Array(alloc(2 * n), 0, n)\n        break\n      case GL_UNSIGNED_SHORT$1:\n        result = new Uint16Array(alloc(2 * n), 0, n)\n        break\n      case GL_INT$1:\n        result = new Int32Array(alloc(4 * n), 0, n)\n        break\n      case GL_UNSIGNED_INT$1:\n        result = new Uint32Array(alloc(4 * n), 0, n)\n        break\n      case GL_FLOAT$2:\n        result = new Float32Array(alloc(4 * n), 0, n)\n        break\n      default:\n        return null\n    }\n    if (result.length !== n) {\n      return result.subarray(0, n)\n    }\n    return result\n  }\n\n  function freeType (array) {\n    free(array.buffer)\n  }\n\n  return {\n    alloc: alloc,\n    free: free,\n    allocType: allocType,\n    freeType: freeType\n  }\n}\n\nvar pool = createPool()\n\n// zero pool for initial zero data\npool.zero = createPool()\n\nvar GL_SUBPIXEL_BITS = 0x0D50\nvar GL_RED_BITS = 0x0D52\nvar GL_GREEN_BITS = 0x0D53\nvar GL_BLUE_BITS = 0x0D54\nvar GL_ALPHA_BITS = 0x0D55\nvar GL_DEPTH_BITS = 0x0D56\nvar GL_STENCIL_BITS = 0x0D57\n\nvar GL_ALIASED_POINT_SIZE_RANGE = 0x846D\nvar GL_ALIASED_LINE_WIDTH_RANGE = 0x846E\n\nvar GL_MAX_TEXTURE_SIZE = 0x0D33\nvar GL_MAX_VIEWPORT_DIMS = 0x0D3A\nvar GL_MAX_VERTEX_ATTRIBS = 0x8869\nvar GL_MAX_VERTEX_UNIFORM_VECTORS = 0x8DFB\nvar GL_MAX_VARYING_VECTORS = 0x8DFC\nvar GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS = 0x8B4D\nvar GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS = 0x8B4C\nvar GL_MAX_TEXTURE_IMAGE_UNITS = 0x8872\nvar GL_MAX_FRAGMENT_UNIFORM_VECTORS = 0x8DFD\nvar GL_MAX_CUBE_MAP_TEXTURE_SIZE = 0x851C\nvar GL_MAX_RENDERBUFFER_SIZE = 0x84E8\n\nvar GL_VENDOR = 0x1F00\nvar GL_RENDERER = 0x1F01\nvar GL_VERSION = 0x1F02\nvar GL_SHADING_LANGUAGE_VERSION = 0x8B8C\n\nvar GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT = 0x84FF\n\nvar GL_MAX_COLOR_ATTACHMENTS_WEBGL = 0x8CDF\nvar GL_MAX_DRAW_BUFFERS_WEBGL = 0x8824\n\nvar GL_TEXTURE_2D = 0x0DE1\nvar GL_TEXTURE_CUBE_MAP = 0x8513\nvar GL_TEXTURE_CUBE_MAP_POSITIVE_X = 0x8515\nvar GL_TEXTURE0 = 0x84C0\nvar GL_RGBA = 0x1908\nvar GL_FLOAT$1 = 0x1406\nvar GL_UNSIGNED_BYTE$1 = 0x1401\nvar GL_FRAMEBUFFER = 0x8D40\nvar GL_FRAMEBUFFER_COMPLETE = 0x8CD5\nvar GL_COLOR_ATTACHMENT0 = 0x8CE0\nvar GL_COLOR_BUFFER_BIT$1 = 0x4000\n\nvar wrapLimits = function (gl, extensions) {\n  var maxAnisotropic = 1\n  if (extensions.ext_texture_filter_anisotropic) {\n    maxAnisotropic = gl.getParameter(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT)\n  }\n\n  var maxDrawbuffers = 1\n  var maxColorAttachments = 1\n  if (extensions.webgl_draw_buffers) {\n    maxDrawbuffers = gl.getParameter(GL_MAX_DRAW_BUFFERS_WEBGL)\n    maxColorAttachments = gl.getParameter(GL_MAX_COLOR_ATTACHMENTS_WEBGL)\n  }\n\n  // detect if reading float textures is available (Safari doesn't support)\n  var readFloat = !!extensions.oes_texture_float\n  if (readFloat) {\n    var readFloatTexture = gl.createTexture()\n    gl.bindTexture(GL_TEXTURE_2D, readFloatTexture)\n    gl.texImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_FLOAT$1, null)\n\n    var fbo = gl.createFramebuffer()\n    gl.bindFramebuffer(GL_FRAMEBUFFER, fbo)\n    gl.framebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, readFloatTexture, 0)\n    gl.bindTexture(GL_TEXTURE_2D, null)\n\n    if (gl.checkFramebufferStatus(GL_FRAMEBUFFER) !== GL_FRAMEBUFFER_COMPLETE) readFloat = false\n\n    else {\n      gl.viewport(0, 0, 1, 1)\n      gl.clearColor(1.0, 0.0, 0.0, 1.0)\n      gl.clear(GL_COLOR_BUFFER_BIT$1)\n      var pixels = pool.allocType(GL_FLOAT$1, 4)\n      gl.readPixels(0, 0, 1, 1, GL_RGBA, GL_FLOAT$1, pixels)\n\n      if (gl.getError()) readFloat = false\n      else {\n        gl.deleteFramebuffer(fbo)\n        gl.deleteTexture(readFloatTexture)\n\n        readFloat = pixels[0] === 1.0\n      }\n\n      pool.freeType(pixels)\n    }\n  }\n\n  // detect non power of two cube textures support (IE doesn't support)\n  var isIE = typeof navigator !== 'undefined' && (/MSIE/.test(navigator.userAgent) || /Trident\\//.test(navigator.appVersion) || /Edge/.test(navigator.userAgent))\n\n  var npotTextureCube = true\n\n  if (!isIE) {\n    var cubeTexture = gl.createTexture()\n    var data = pool.allocType(GL_UNSIGNED_BYTE$1, 36)\n    gl.activeTexture(GL_TEXTURE0)\n    gl.bindTexture(GL_TEXTURE_CUBE_MAP, cubeTexture)\n    gl.texImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, GL_RGBA, 3, 3, 0, GL_RGBA, GL_UNSIGNED_BYTE$1, data)\n    pool.freeType(data)\n    gl.bindTexture(GL_TEXTURE_CUBE_MAP, null)\n    gl.deleteTexture(cubeTexture)\n    npotTextureCube = !gl.getError()\n  }\n\n  return {\n    // drawing buffer bit depth\n    colorBits: [\n      gl.getParameter(GL_RED_BITS),\n      gl.getParameter(GL_GREEN_BITS),\n      gl.getParameter(GL_BLUE_BITS),\n      gl.getParameter(GL_ALPHA_BITS)\n    ],\n    depthBits: gl.getParameter(GL_DEPTH_BITS),\n    stencilBits: gl.getParameter(GL_STENCIL_BITS),\n    subpixelBits: gl.getParameter(GL_SUBPIXEL_BITS),\n\n    // supported extensions\n    extensions: Object.keys(extensions).filter(function (ext) {\n      return !!extensions[ext]\n    }),\n\n    // max aniso samples\n    maxAnisotropic: maxAnisotropic,\n\n    // max draw buffers\n    maxDrawbuffers: maxDrawbuffers,\n    maxColorAttachments: maxColorAttachments,\n\n    // point and line size ranges\n    pointSizeDims: gl.getParameter(GL_ALIASED_POINT_SIZE_RANGE),\n    lineWidthDims: gl.getParameter(GL_ALIASED_LINE_WIDTH_RANGE),\n    maxViewportDims: gl.getParameter(GL_MAX_VIEWPORT_DIMS),\n    maxCombinedTextureUnits: gl.getParameter(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS),\n    maxCubeMapSize: gl.getParameter(GL_MAX_CUBE_MAP_TEXTURE_SIZE),\n    maxRenderbufferSize: gl.getParameter(GL_MAX_RENDERBUFFER_SIZE),\n    maxTextureUnits: gl.getParameter(GL_MAX_TEXTURE_IMAGE_UNITS),\n    maxTextureSize: gl.getParameter(GL_MAX_TEXTURE_SIZE),\n    maxAttributes: gl.getParameter(GL_MAX_VERTEX_ATTRIBS),\n    maxVertexUniforms: gl.getParameter(GL_MAX_VERTEX_UNIFORM_VECTORS),\n    maxVertexTextureUnits: gl.getParameter(GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS),\n    maxVaryingVectors: gl.getParameter(GL_MAX_VARYING_VECTORS),\n    maxFragmentUniforms: gl.getParameter(GL_MAX_FRAGMENT_UNIFORM_VECTORS),\n\n    // vendor info\n    glsl: gl.getParameter(GL_SHADING_LANGUAGE_VERSION),\n    renderer: gl.getParameter(GL_RENDERER),\n    vendor: gl.getParameter(GL_VENDOR),\n    version: gl.getParameter(GL_VERSION),\n\n    // quirks\n    readFloat: readFloat,\n    npotTextureCube: npotTextureCube\n  }\n}\n\nfunction isNDArrayLike (obj) {\n  return (\n    !!obj &&\n    typeof obj === 'object' &&\n    Array.isArray(obj.shape) &&\n    Array.isArray(obj.stride) &&\n    typeof obj.offset === 'number' &&\n    obj.shape.length === obj.stride.length &&\n    (Array.isArray(obj.data) ||\n      isTypedArray(obj.data)))\n}\n\nvar values = function (obj) {\n  return Object.keys(obj).map(function (key) { return obj[key] })\n}\n\nvar flattenUtils = {\n  shape: arrayShape$1,\n  flatten: flattenArray\n};\n\nfunction flatten1D (array, nx, out) {\n  for (var i = 0; i < nx; ++i) {\n    out[i] = array[i]\n  }\n}\n\nfunction flatten2D (array, nx, ny, out) {\n  var ptr = 0\n  for (var i = 0; i < nx; ++i) {\n    var row = array[i]\n    for (var j = 0; j < ny; ++j) {\n      out[ptr++] = row[j]\n    }\n  }\n}\n\nfunction flatten3D (array, nx, ny, nz, out, ptr_) {\n  var ptr = ptr_\n  for (var i = 0; i < nx; ++i) {\n    var row = array[i]\n    for (var j = 0; j < ny; ++j) {\n      var col = row[j]\n      for (var k = 0; k < nz; ++k) {\n        out[ptr++] = col[k]\n      }\n    }\n  }\n}\n\nfunction flattenRec (array, shape, level, out, ptr) {\n  var stride = 1\n  for (var i = level + 1; i < shape.length; ++i) {\n    stride *= shape[i]\n  }\n  var n = shape[level]\n  if (shape.length - level === 4) {\n    var nx = shape[level + 1]\n    var ny = shape[level + 2]\n    var nz = shape[level + 3]\n    for (i = 0; i < n; ++i) {\n      flatten3D(array[i], nx, ny, nz, out, ptr)\n      ptr += stride\n    }\n  } else {\n    for (i = 0; i < n; ++i) {\n      flattenRec(array[i], shape, level + 1, out, ptr)\n      ptr += stride\n    }\n  }\n}\n\nfunction flattenArray (array, shape, type, out_) {\n  var sz = 1\n  if (shape.length) {\n    for (var i = 0; i < shape.length; ++i) {\n      sz *= shape[i]\n    }\n  } else {\n    sz = 0\n  }\n  var out = out_ || pool.allocType(type, sz)\n  switch (shape.length) {\n    case 0:\n      break\n    case 1:\n      flatten1D(array, shape[0], out)\n      break\n    case 2:\n      flatten2D(array, shape[0], shape[1], out)\n      break\n    case 3:\n      flatten3D(array, shape[0], shape[1], shape[2], out, 0)\n      break\n    default:\n      flattenRec(array, shape, 0, out, 0)\n  }\n  return out\n}\n\nfunction arrayShape$1 (array_) {\n  var shape = []\n  for (var array = array_; array.length; array = array[0]) {\n    shape.push(array.length)\n  }\n  return shape\n}\n\nvar arrayTypes =  {\n\t\"[object Int8Array]\": 5120,\n\t\"[object Int16Array]\": 5122,\n\t\"[object Int32Array]\": 5124,\n\t\"[object Uint8Array]\": 5121,\n\t\"[object Uint8ClampedArray]\": 5121,\n\t\"[object Uint16Array]\": 5123,\n\t\"[object Uint32Array]\": 5125,\n\t\"[object Float32Array]\": 5126,\n\t\"[object Float64Array]\": 5121,\n\t\"[object ArrayBuffer]\": 5121\n};\n\nvar int8 = 5120;\nvar int16 = 5122;\nvar int32 = 5124;\nvar uint8 = 5121;\nvar uint16 = 5123;\nvar uint32 = 5125;\nvar float = 5126;\nvar float32 = 5126;\nvar glTypes = {\n\tint8: int8,\n\tint16: int16,\n\tint32: int32,\n\tuint8: uint8,\n\tuint16: uint16,\n\tuint32: uint32,\n\tfloat: float,\n\tfloat32: float32\n};\n\nvar dynamic$1 = 35048;\nvar stream = 35040;\nvar usageTypes = {\n\tdynamic: dynamic$1,\n\tstream: stream,\n\t\"static\": 35044\n};\n\nvar arrayFlatten = flattenUtils.flatten\nvar arrayShape = flattenUtils.shape\n\nvar GL_STATIC_DRAW = 0x88E4\nvar GL_STREAM_DRAW = 0x88E0\n\nvar GL_UNSIGNED_BYTE$3 = 5121\nvar GL_FLOAT$3 = 5126\n\nvar DTYPES_SIZES = []\nDTYPES_SIZES[5120] = 1 // int8\nDTYPES_SIZES[5122] = 2 // int16\nDTYPES_SIZES[5124] = 4 // int32\nDTYPES_SIZES[5121] = 1 // uint8\nDTYPES_SIZES[5123] = 2 // uint16\nDTYPES_SIZES[5125] = 4 // uint32\nDTYPES_SIZES[5126] = 4 // float32\n\nfunction typedArrayCode (data) {\n  return arrayTypes[Object.prototype.toString.call(data)] | 0\n}\n\nfunction copyArray (out, inp) {\n  for (var i = 0; i < inp.length; ++i) {\n    out[i] = inp[i]\n  }\n}\n\nfunction transpose (\n  result, data, shapeX, shapeY, strideX, strideY, offset) {\n  var ptr = 0\n  for (var i = 0; i < shapeX; ++i) {\n    for (var j = 0; j < shapeY; ++j) {\n      result[ptr++] = data[strideX * i + strideY * j + offset]\n    }\n  }\n}\n\nfunction wrapBufferState (gl, stats, config, destroyBuffer) {\n  var bufferCount = 0\n  var bufferSet = {}\n\n  function REGLBuffer (type) {\n    this.id = bufferCount++\n    this.buffer = gl.createBuffer()\n    this.type = type\n    this.usage = GL_STATIC_DRAW\n    this.byteLength = 0\n    this.dimension = 1\n    this.dtype = GL_UNSIGNED_BYTE$3\n\n    this.persistentData = null\n\n    if (config.profile) {\n      this.stats = { size: 0 }\n    }\n  }\n\n  REGLBuffer.prototype.bind = function () {\n    gl.bindBuffer(this.type, this.buffer)\n  }\n\n  REGLBuffer.prototype.destroy = function () {\n    destroy(this)\n  }\n\n  var streamPool = []\n\n  function createStream (type, data) {\n    var buffer = streamPool.pop()\n    if (!buffer) {\n      buffer = new REGLBuffer(type)\n    }\n    buffer.bind()\n    initBufferFromData(buffer, data, GL_STREAM_DRAW, 0, 1, false)\n    return buffer\n  }\n\n  function destroyStream (stream$$1) {\n    streamPool.push(stream$$1)\n  }\n\n  function initBufferFromTypedArray (buffer, data, usage) {\n    buffer.byteLength = data.byteLength\n    gl.bufferData(buffer.type, data, usage)\n  }\n\n  function initBufferFromData (buffer, data, usage, dtype, dimension, persist) {\n    var shape\n    buffer.usage = usage\n    if (Array.isArray(data)) {\n      buffer.dtype = dtype || GL_FLOAT$3\n      if (data.length > 0) {\n        var flatData\n        if (Array.isArray(data[0])) {\n          shape = arrayShape(data)\n          var dim = 1\n          for (var i = 1; i < shape.length; ++i) {\n            dim *= shape[i]\n          }\n          buffer.dimension = dim\n          flatData = arrayFlatten(data, shape, buffer.dtype)\n          initBufferFromTypedArray(buffer, flatData, usage)\n          if (persist) {\n            buffer.persistentData = flatData\n          } else {\n            pool.freeType(flatData)\n          }\n        } else if (typeof data[0] === 'number') {\n          buffer.dimension = dimension\n          var typedData = pool.allocType(buffer.dtype, data.length)\n          copyArray(typedData, data)\n          initBufferFromTypedArray(buffer, typedData, usage)\n          if (persist) {\n            buffer.persistentData = typedData\n          } else {\n            pool.freeType(typedData)\n          }\n        } else if (isTypedArray(data[0])) {\n          buffer.dimension = data[0].length\n          buffer.dtype = dtype || typedArrayCode(data[0]) || GL_FLOAT$3\n          flatData = arrayFlatten(\n            data,\n            [data.length, data[0].length],\n            buffer.dtype)\n          initBufferFromTypedArray(buffer, flatData, usage)\n          if (persist) {\n            buffer.persistentData = flatData\n          } else {\n            pool.freeType(flatData)\n          }\n        } else {\n          check$1.raise('invalid buffer data')\n        }\n      }\n    } else if (isTypedArray(data)) {\n      buffer.dtype = dtype || typedArrayCode(data)\n      buffer.dimension = dimension\n      initBufferFromTypedArray(buffer, data, usage)\n      if (persist) {\n        buffer.persistentData = new Uint8Array(new Uint8Array(data.buffer))\n      }\n    } else if (isNDArrayLike(data)) {\n      shape = data.shape\n      var stride = data.stride\n      var offset = data.offset\n\n      var shapeX = 0\n      var shapeY = 0\n      var strideX = 0\n      var strideY = 0\n      if (shape.length === 1) {\n        shapeX = shape[0]\n        shapeY = 1\n        strideX = stride[0]\n        strideY = 0\n      } else if (shape.length === 2) {\n        shapeX = shape[0]\n        shapeY = shape[1]\n        strideX = stride[0]\n        strideY = stride[1]\n      } else {\n        check$1.raise('invalid shape')\n      }\n\n      buffer.dtype = dtype || typedArrayCode(data.data) || GL_FLOAT$3\n      buffer.dimension = shapeY\n\n      var transposeData = pool.allocType(buffer.dtype, shapeX * shapeY)\n      transpose(transposeData,\n        data.data,\n        shapeX, shapeY,\n        strideX, strideY,\n        offset)\n      initBufferFromTypedArray(buffer, transposeData, usage)\n      if (persist) {\n        buffer.persistentData = transposeData\n      } else {\n        pool.freeType(transposeData)\n      }\n    } else if (data instanceof ArrayBuffer) {\n      buffer.dtype = GL_UNSIGNED_BYTE$3\n      buffer.dimension = dimension\n      initBufferFromTypedArray(buffer, data, usage)\n      if (persist) {\n        buffer.persistentData = new Uint8Array(new Uint8Array(data))\n      }\n    } else {\n      check$1.raise('invalid buffer data')\n    }\n  }\n\n  function destroy (buffer) {\n    stats.bufferCount--\n\n    // remove attribute link\n    destroyBuffer(buffer)\n\n    var handle = buffer.buffer\n    check$1(handle, 'buffer must not be deleted already')\n    gl.deleteBuffer(handle)\n    buffer.buffer = null\n    delete bufferSet[buffer.id]\n  }\n\n  function createBuffer (options, type, deferInit, persistent) {\n    stats.bufferCount++\n\n    var buffer = new REGLBuffer(type)\n    bufferSet[buffer.id] = buffer\n\n    function reglBuffer (options) {\n      var usage = GL_STATIC_DRAW\n      var data = null\n      var byteLength = 0\n      var dtype = 0\n      var dimension = 1\n      if (Array.isArray(options) ||\n          isTypedArray(options) ||\n          isNDArrayLike(options) ||\n          options instanceof ArrayBuffer) {\n        data = options\n      } else if (typeof options === 'number') {\n        byteLength = options | 0\n      } else if (options) {\n        check$1.type(\n          options, 'object',\n          'buffer arguments must be an object, a number or an array')\n\n        if ('data' in options) {\n          check$1(\n            data === null ||\n            Array.isArray(data) ||\n            isTypedArray(data) ||\n            isNDArrayLike(data),\n            'invalid data for buffer')\n          data = options.data\n        }\n\n        if ('usage' in options) {\n          check$1.parameter(options.usage, usageTypes, 'invalid buffer usage')\n          usage = usageTypes[options.usage]\n        }\n\n        if ('type' in options) {\n          check$1.parameter(options.type, glTypes, 'invalid buffer type')\n          dtype = glTypes[options.type]\n        }\n\n        if ('dimension' in options) {\n          check$1.type(options.dimension, 'number', 'invalid dimension')\n          dimension = options.dimension | 0\n        }\n\n        if ('length' in options) {\n          check$1.nni(byteLength, 'buffer length must be a nonnegative integer')\n          byteLength = options.length | 0\n        }\n      }\n\n      buffer.bind()\n      if (!data) {\n        // #475\n        if (byteLength) gl.bufferData(buffer.type, byteLength, usage)\n        buffer.dtype = dtype || GL_UNSIGNED_BYTE$3\n        buffer.usage = usage\n        buffer.dimension = dimension\n        buffer.byteLength = byteLength\n      } else {\n        initBufferFromData(buffer, data, usage, dtype, dimension, persistent)\n      }\n\n      if (config.profile) {\n        buffer.stats.size = buffer.byteLength * DTYPES_SIZES[buffer.dtype]\n      }\n\n      return reglBuffer\n    }\n\n    function setSubData (data, offset) {\n      check$1(offset + data.byteLength <= buffer.byteLength,\n        'invalid buffer subdata call, buffer is too small. ' + ' Can\\'t write data of size ' + data.byteLength + ' starting from offset ' + offset + ' to a buffer of size ' + buffer.byteLength)\n\n      gl.bufferSubData(buffer.type, offset, data)\n    }\n\n    function subdata (data, offset_) {\n      var offset = (offset_ || 0) | 0\n      var shape\n      buffer.bind()\n      if (isTypedArray(data) || data instanceof ArrayBuffer) {\n        setSubData(data, offset)\n      } else if (Array.isArray(data)) {\n        if (data.length > 0) {\n          if (typeof data[0] === 'number') {\n            var converted = pool.allocType(buffer.dtype, data.length)\n            copyArray(converted, data)\n            setSubData(converted, offset)\n            pool.freeType(converted)\n          } else if (Array.isArray(data[0]) || isTypedArray(data[0])) {\n            shape = arrayShape(data)\n            var flatData = arrayFlatten(data, shape, buffer.dtype)\n            setSubData(flatData, offset)\n            pool.freeType(flatData)\n          } else {\n            check$1.raise('invalid buffer data')\n          }\n        }\n      } else if (isNDArrayLike(data)) {\n        shape = data.shape\n        var stride = data.stride\n\n        var shapeX = 0\n        var shapeY = 0\n        var strideX = 0\n        var strideY = 0\n        if (shape.length === 1) {\n          shapeX = shape[0]\n          shapeY = 1\n          strideX = stride[0]\n          strideY = 0\n        } else if (shape.length === 2) {\n          shapeX = shape[0]\n          shapeY = shape[1]\n          strideX = stride[0]\n          strideY = stride[1]\n        } else {\n          check$1.raise('invalid shape')\n        }\n        var dtype = Array.isArray(data.data)\n          ? buffer.dtype\n          : typedArrayCode(data.data)\n\n        var transposeData = pool.allocType(dtype, shapeX * shapeY)\n        transpose(transposeData,\n          data.data,\n          shapeX, shapeY,\n          strideX, strideY,\n          data.offset)\n        setSubData(transposeData, offset)\n        pool.freeType(transposeData)\n      } else {\n        check$1.raise('invalid data for buffer subdata')\n      }\n      return reglBuffer\n    }\n\n    if (!deferInit) {\n      reglBuffer(options)\n    }\n\n    reglBuffer._reglType = 'buffer'\n    reglBuffer._buffer = buffer\n    reglBuffer.subdata = subdata\n    if (config.profile) {\n      reglBuffer.stats = buffer.stats\n    }\n    reglBuffer.destroy = function () { destroy(buffer) }\n\n    return reglBuffer\n  }\n\n  function restoreBuffers () {\n    values(bufferSet).forEach(function (buffer) {\n      buffer.buffer = gl.createBuffer()\n      gl.bindBuffer(buffer.type, buffer.buffer)\n      gl.bufferData(\n        buffer.type, buffer.persistentData || buffer.byteLength, buffer.usage)\n    })\n  }\n\n  if (config.profile) {\n    stats.getTotalBufferSize = function () {\n      var total = 0\n      // TODO: Right now, the streams are not part of the total count.\n      Object.keys(bufferSet).forEach(function (key) {\n        total += bufferSet[key].stats.size\n      })\n      return total\n    }\n  }\n\n  return {\n    create: createBuffer,\n\n    createStream: createStream,\n    destroyStream: destroyStream,\n\n    clear: function () {\n      values(bufferSet).forEach(destroy)\n      streamPool.forEach(destroy)\n    },\n\n    getBuffer: function (wrapper) {\n      if (wrapper && wrapper._buffer instanceof REGLBuffer) {\n        return wrapper._buffer\n      }\n      return null\n    },\n\n    restore: restoreBuffers,\n\n    _initBuffer: initBufferFromData\n  }\n}\n\nvar points = 0;\nvar point = 0;\nvar lines = 1;\nvar line = 1;\nvar triangles = 4;\nvar triangle = 4;\nvar primTypes = {\n\tpoints: points,\n\tpoint: point,\n\tlines: lines,\n\tline: line,\n\ttriangles: triangles,\n\ttriangle: triangle,\n\t\"line loop\": 2,\n\t\"line strip\": 3,\n\t\"triangle strip\": 5,\n\t\"triangle fan\": 6\n};\n\nvar GL_POINTS = 0\nvar GL_LINES = 1\nvar GL_TRIANGLES = 4\n\nvar GL_BYTE$2 = 5120\nvar GL_UNSIGNED_BYTE$4 = 5121\nvar GL_SHORT$2 = 5122\nvar GL_UNSIGNED_SHORT$2 = 5123\nvar GL_INT$2 = 5124\nvar GL_UNSIGNED_INT$2 = 5125\n\nvar GL_ELEMENT_ARRAY_BUFFER = 34963\n\nvar GL_STREAM_DRAW$1 = 0x88E0\nvar GL_STATIC_DRAW$1 = 0x88E4\n\nfunction wrapElementsState (gl, extensions, bufferState, stats) {\n  var elementSet = {}\n  var elementCount = 0\n\n  var elementTypes = {\n    'uint8': GL_UNSIGNED_BYTE$4,\n    'uint16': GL_UNSIGNED_SHORT$2\n  }\n\n  if (extensions.oes_element_index_uint) {\n    elementTypes.uint32 = GL_UNSIGNED_INT$2\n  }\n\n  function REGLElementBuffer (buffer) {\n    this.id = elementCount++\n    elementSet[this.id] = this\n    this.buffer = buffer\n    this.primType = GL_TRIANGLES\n    this.vertCount = 0\n    this.type = 0\n  }\n\n  REGLElementBuffer.prototype.bind = function () {\n    this.buffer.bind()\n  }\n\n  var bufferPool = []\n\n  function createElementStream (data) {\n    var result = bufferPool.pop()\n    if (!result) {\n      result = new REGLElementBuffer(bufferState.create(\n        null,\n        GL_ELEMENT_ARRAY_BUFFER,\n        true,\n        false)._buffer)\n    }\n    initElements(result, data, GL_STREAM_DRAW$1, -1, -1, 0, 0)\n    return result\n  }\n\n  function destroyElementStream (elements) {\n    bufferPool.push(elements)\n  }\n\n  function initElements (\n    elements,\n    data,\n    usage,\n    prim,\n    count,\n    byteLength,\n    type) {\n    elements.buffer.bind()\n    var dtype\n    if (data) {\n      var predictedType = type\n      if (!type && (\n        !isTypedArray(data) ||\n         (isNDArrayLike(data) && !isTypedArray(data.data)))) {\n        predictedType = extensions.oes_element_index_uint\n          ? GL_UNSIGNED_INT$2\n          : GL_UNSIGNED_SHORT$2\n      }\n      bufferState._initBuffer(\n        elements.buffer,\n        data,\n        usage,\n        predictedType,\n        3)\n    } else {\n      gl.bufferData(GL_ELEMENT_ARRAY_BUFFER, byteLength, usage)\n      elements.buffer.dtype = dtype || GL_UNSIGNED_BYTE$4\n      elements.buffer.usage = usage\n      elements.buffer.dimension = 3\n      elements.buffer.byteLength = byteLength\n    }\n\n    dtype = type\n    if (!type) {\n      switch (elements.buffer.dtype) {\n        case GL_UNSIGNED_BYTE$4:\n        case GL_BYTE$2:\n          dtype = GL_UNSIGNED_BYTE$4\n          break\n\n        case GL_UNSIGNED_SHORT$2:\n        case GL_SHORT$2:\n          dtype = GL_UNSIGNED_SHORT$2\n          break\n\n        case GL_UNSIGNED_INT$2:\n        case GL_INT$2:\n          dtype = GL_UNSIGNED_INT$2\n          break\n\n        default:\n          check$1.raise('unsupported type for element array')\n      }\n      elements.buffer.dtype = dtype\n    }\n    elements.type = dtype\n\n    // Check oes_element_index_uint extension\n    check$1(\n      dtype !== GL_UNSIGNED_INT$2 ||\n      !!extensions.oes_element_index_uint,\n      '32 bit element buffers not supported, enable oes_element_index_uint first')\n\n    // try to guess default primitive type and arguments\n    var vertCount = count\n    if (vertCount < 0) {\n      vertCount = elements.buffer.byteLength\n      if (dtype === GL_UNSIGNED_SHORT$2) {\n        vertCount >>= 1\n      } else if (dtype === GL_UNSIGNED_INT$2) {\n        vertCount >>= 2\n      }\n    }\n    elements.vertCount = vertCount\n\n    // try to guess primitive type from cell dimension\n    var primType = prim\n    if (prim < 0) {\n      primType = GL_TRIANGLES\n      var dimension = elements.buffer.dimension\n      if (dimension === 1) primType = GL_POINTS\n      if (dimension === 2) primType = GL_LINES\n      if (dimension === 3) primType = GL_TRIANGLES\n    }\n    elements.primType = primType\n  }\n\n  function destroyElements (elements) {\n    stats.elementsCount--\n\n    check$1(elements.buffer !== null, 'must not double destroy elements')\n    delete elementSet[elements.id]\n    elements.buffer.destroy()\n    elements.buffer = null\n  }\n\n  function createElements (options, persistent) {\n    var buffer = bufferState.create(null, GL_ELEMENT_ARRAY_BUFFER, true)\n    var elements = new REGLElementBuffer(buffer._buffer)\n    stats.elementsCount++\n\n    function reglElements (options) {\n      if (!options) {\n        buffer()\n        elements.primType = GL_TRIANGLES\n        elements.vertCount = 0\n        elements.type = GL_UNSIGNED_BYTE$4\n      } else if (typeof options === 'number') {\n        buffer(options)\n        elements.primType = GL_TRIANGLES\n        elements.vertCount = options | 0\n        elements.type = GL_UNSIGNED_BYTE$4\n      } else {\n        var data = null\n        var usage = GL_STATIC_DRAW$1\n        var primType = -1\n        var vertCount = -1\n        var byteLength = 0\n        var dtype = 0\n        if (Array.isArray(options) ||\n            isTypedArray(options) ||\n            isNDArrayLike(options)) {\n          data = options\n        } else {\n          check$1.type(options, 'object', 'invalid arguments for elements')\n          if ('data' in options) {\n            data = options.data\n            check$1(\n              Array.isArray(data) ||\n                isTypedArray(data) ||\n                isNDArrayLike(data),\n              'invalid data for element buffer')\n          }\n          if ('usage' in options) {\n            check$1.parameter(\n              options.usage,\n              usageTypes,\n              'invalid element buffer usage')\n            usage = usageTypes[options.usage]\n          }\n          if ('primitive' in options) {\n            check$1.parameter(\n              options.primitive,\n              primTypes,\n              'invalid element buffer primitive')\n            primType = primTypes[options.primitive]\n          }\n          if ('count' in options) {\n            check$1(\n              typeof options.count === 'number' && options.count >= 0,\n              'invalid vertex count for elements')\n            vertCount = options.count | 0\n          }\n          if ('type' in options) {\n            check$1.parameter(\n              options.type,\n              elementTypes,\n              'invalid buffer type')\n            dtype = elementTypes[options.type]\n          }\n          if ('length' in options) {\n            byteLength = options.length | 0\n          } else {\n            byteLength = vertCount\n            if (dtype === GL_UNSIGNED_SHORT$2 || dtype === GL_SHORT$2) {\n              byteLength *= 2\n            } else if (dtype === GL_UNSIGNED_INT$2 || dtype === GL_INT$2) {\n              byteLength *= 4\n            }\n          }\n        }\n        initElements(\n          elements,\n          data,\n          usage,\n          primType,\n          vertCount,\n          byteLength,\n          dtype)\n      }\n\n      return reglElements\n    }\n\n    reglElements(options)\n\n    reglElements._reglType = 'elements'\n    reglElements._elements = elements\n    reglElements.subdata = function (data, offset) {\n      buffer.subdata(data, offset)\n      return reglElements\n    }\n    reglElements.destroy = function () {\n      destroyElements(elements)\n    }\n\n    return reglElements\n  }\n\n  return {\n    create: createElements,\n    createStream: createElementStream,\n    destroyStream: destroyElementStream,\n    getElements: function (elements) {\n      if (typeof elements === 'function' &&\n          elements._elements instanceof REGLElementBuffer) {\n        return elements._elements\n      }\n      return null\n    },\n    clear: function () {\n      values(elementSet).forEach(destroyElements)\n    }\n  }\n}\n\nvar FLOAT = new Float32Array(1)\nvar INT = new Uint32Array(FLOAT.buffer)\n\nvar GL_UNSIGNED_SHORT$4 = 5123\n\nfunction convertToHalfFloat (array) {\n  var ushorts = pool.allocType(GL_UNSIGNED_SHORT$4, array.length)\n\n  for (var i = 0; i < array.length; ++i) {\n    if (isNaN(array[i])) {\n      ushorts[i] = 0xffff\n    } else if (array[i] === Infinity) {\n      ushorts[i] = 0x7c00\n    } else if (array[i] === -Infinity) {\n      ushorts[i] = 0xfc00\n    } else {\n      FLOAT[0] = array[i]\n      var x = INT[0]\n\n      var sgn = (x >>> 31) << 15\n      var exp = ((x << 1) >>> 24) - 127\n      var frac = (x >> 13) & ((1 << 10) - 1)\n\n      if (exp < -24) {\n        // round non-representable denormals to 0\n        ushorts[i] = sgn\n      } else if (exp < -14) {\n        // handle denormals\n        var s = -14 - exp\n        ushorts[i] = sgn + ((frac + (1 << 10)) >> s)\n      } else if (exp > 15) {\n        // round overflow to +/- Infinity\n        ushorts[i] = sgn + 0x7c00\n      } else {\n        // otherwise convert directly\n        ushorts[i] = sgn + ((exp + 15) << 10) + frac\n      }\n    }\n  }\n\n  return ushorts\n}\n\nfunction isArrayLike (s) {\n  return Array.isArray(s) || isTypedArray(s)\n}\n\nvar isPow2$1 = function (v) {\n  return !(v & (v - 1)) && (!!v)\n}\n\nvar GL_COMPRESSED_TEXTURE_FORMATS = 0x86A3\n\nvar GL_TEXTURE_2D$1 = 0x0DE1\nvar GL_TEXTURE_CUBE_MAP$1 = 0x8513\nvar GL_TEXTURE_CUBE_MAP_POSITIVE_X$1 = 0x8515\n\nvar GL_RGBA$1 = 0x1908\nvar GL_ALPHA = 0x1906\nvar GL_RGB = 0x1907\nvar GL_LUMINANCE = 0x1909\nvar GL_LUMINANCE_ALPHA = 0x190A\n\nvar GL_RGBA4 = 0x8056\nvar GL_RGB5_A1 = 0x8057\nvar GL_RGB565 = 0x8D62\n\nvar GL_UNSIGNED_SHORT_4_4_4_4$1 = 0x8033\nvar GL_UNSIGNED_SHORT_5_5_5_1$1 = 0x8034\nvar GL_UNSIGNED_SHORT_5_6_5$1 = 0x8363\nvar GL_UNSIGNED_INT_24_8_WEBGL$1 = 0x84FA\n\nvar GL_DEPTH_COMPONENT = 0x1902\nvar GL_DEPTH_STENCIL = 0x84F9\n\nvar GL_SRGB_EXT = 0x8C40\nvar GL_SRGB_ALPHA_EXT = 0x8C42\n\nvar GL_HALF_FLOAT_OES$1 = 0x8D61\n\nvar GL_COMPRESSED_RGB_S3TC_DXT1_EXT = 0x83F0\nvar GL_COMPRESSED_RGBA_S3TC_DXT1_EXT = 0x83F1\nvar GL_COMPRESSED_RGBA_S3TC_DXT3_EXT = 0x83F2\nvar GL_COMPRESSED_RGBA_S3TC_DXT5_EXT = 0x83F3\n\nvar GL_COMPRESSED_RGB_ATC_WEBGL = 0x8C92\nvar GL_COMPRESSED_RGBA_ATC_EXPLICIT_ALPHA_WEBGL = 0x8C93\nvar GL_COMPRESSED_RGBA_ATC_INTERPOLATED_ALPHA_WEBGL = 0x87EE\n\nvar GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG = 0x8C00\nvar GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG = 0x8C01\nvar GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG = 0x8C02\nvar GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG = 0x8C03\n\nvar GL_COMPRESSED_RGB_ETC1_WEBGL = 0x8D64\n\nvar GL_UNSIGNED_BYTE$5 = 0x1401\nvar GL_UNSIGNED_SHORT$3 = 0x1403\nvar GL_UNSIGNED_INT$3 = 0x1405\nvar GL_FLOAT$4 = 0x1406\n\nvar GL_TEXTURE_WRAP_S = 0x2802\nvar GL_TEXTURE_WRAP_T = 0x2803\n\nvar GL_REPEAT = 0x2901\nvar GL_CLAMP_TO_EDGE$1 = 0x812F\nvar GL_MIRRORED_REPEAT = 0x8370\n\nvar GL_TEXTURE_MAG_FILTER = 0x2800\nvar GL_TEXTURE_MIN_FILTER = 0x2801\n\nvar GL_NEAREST$1 = 0x2600\nvar GL_LINEAR = 0x2601\nvar GL_NEAREST_MIPMAP_NEAREST$1 = 0x2700\nvar GL_LINEAR_MIPMAP_NEAREST$1 = 0x2701\nvar GL_NEAREST_MIPMAP_LINEAR$1 = 0x2702\nvar GL_LINEAR_MIPMAP_LINEAR$1 = 0x2703\n\nvar GL_GENERATE_MIPMAP_HINT = 0x8192\nvar GL_DONT_CARE = 0x1100\nvar GL_FASTEST = 0x1101\nvar GL_NICEST = 0x1102\n\nvar GL_TEXTURE_MAX_ANISOTROPY_EXT = 0x84FE\n\nvar GL_UNPACK_ALIGNMENT = 0x0CF5\nvar GL_UNPACK_FLIP_Y_WEBGL = 0x9240\nvar GL_UNPACK_PREMULTIPLY_ALPHA_WEBGL = 0x9241\nvar GL_UNPACK_COLORSPACE_CONVERSION_WEBGL = 0x9243\n\nvar GL_BROWSER_DEFAULT_WEBGL = 0x9244\n\nvar GL_TEXTURE0$1 = 0x84C0\n\nvar MIPMAP_FILTERS = [\n  GL_NEAREST_MIPMAP_NEAREST$1,\n  GL_NEAREST_MIPMAP_LINEAR$1,\n  GL_LINEAR_MIPMAP_NEAREST$1,\n  GL_LINEAR_MIPMAP_LINEAR$1\n]\n\nvar CHANNELS_FORMAT = [\n  0,\n  GL_LUMINANCE,\n  GL_LUMINANCE_ALPHA,\n  GL_RGB,\n  GL_RGBA$1\n]\n\nvar FORMAT_CHANNELS = {}\nFORMAT_CHANNELS[GL_LUMINANCE] =\nFORMAT_CHANNELS[GL_ALPHA] =\nFORMAT_CHANNELS[GL_DEPTH_COMPONENT] = 1\nFORMAT_CHANNELS[GL_DEPTH_STENCIL] =\nFORMAT_CHANNELS[GL_LUMINANCE_ALPHA] = 2\nFORMAT_CHANNELS[GL_RGB] =\nFORMAT_CHANNELS[GL_SRGB_EXT] = 3\nFORMAT_CHANNELS[GL_RGBA$1] =\nFORMAT_CHANNELS[GL_SRGB_ALPHA_EXT] = 4\n\nfunction objectName (str) {\n  return '[object ' + str + ']'\n}\n\nvar CANVAS_CLASS = objectName('HTMLCanvasElement')\nvar OFFSCREENCANVAS_CLASS = objectName('OffscreenCanvas')\nvar CONTEXT2D_CLASS = objectName('CanvasRenderingContext2D')\nvar BITMAP_CLASS = objectName('ImageBitmap')\nvar IMAGE_CLASS = objectName('HTMLImageElement')\nvar VIDEO_CLASS = objectName('HTMLVideoElement')\n\nvar PIXEL_CLASSES = Object.keys(arrayTypes).concat([\n  CANVAS_CLASS,\n  OFFSCREENCANVAS_CLASS,\n  CONTEXT2D_CLASS,\n  BITMAP_CLASS,\n  IMAGE_CLASS,\n  VIDEO_CLASS\n])\n\n// for every texture type, store\n// the size in bytes.\nvar TYPE_SIZES = []\nTYPE_SIZES[GL_UNSIGNED_BYTE$5] = 1\nTYPE_SIZES[GL_FLOAT$4] = 4\nTYPE_SIZES[GL_HALF_FLOAT_OES$1] = 2\n\nTYPE_SIZES[GL_UNSIGNED_SHORT$3] = 2\nTYPE_SIZES[GL_UNSIGNED_INT$3] = 4\n\nvar FORMAT_SIZES_SPECIAL = []\nFORMAT_SIZES_SPECIAL[GL_RGBA4] = 2\nFORMAT_SIZES_SPECIAL[GL_RGB5_A1] = 2\nFORMAT_SIZES_SPECIAL[GL_RGB565] = 2\nFORMAT_SIZES_SPECIAL[GL_DEPTH_STENCIL] = 4\n\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGB_S3TC_DXT1_EXT] = 0.5\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_S3TC_DXT1_EXT] = 0.5\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_S3TC_DXT3_EXT] = 1\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_S3TC_DXT5_EXT] = 1\n\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGB_ATC_WEBGL] = 0.5\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_ATC_EXPLICIT_ALPHA_WEBGL] = 1\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_ATC_INTERPOLATED_ALPHA_WEBGL] = 1\n\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG] = 0.5\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG] = 0.25\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG] = 0.5\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG] = 0.25\n\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGB_ETC1_WEBGL] = 0.5\n\nfunction isNumericArray (arr) {\n  return (\n    Array.isArray(arr) &&\n    (arr.length === 0 ||\n    typeof arr[0] === 'number'))\n}\n\nfunction isRectArray (arr) {\n  if (!Array.isArray(arr)) {\n    return false\n  }\n  var width = arr.length\n  if (width === 0 || !isArrayLike(arr[0])) {\n    return false\n  }\n  return true\n}\n\nfunction classString (x) {\n  return Object.prototype.toString.call(x)\n}\n\nfunction isCanvasElement (object) {\n  return classString(object) === CANVAS_CLASS\n}\n\nfunction isOffscreenCanvas (object) {\n  return classString(object) === OFFSCREENCANVAS_CLASS\n}\n\nfunction isContext2D (object) {\n  return classString(object) === CONTEXT2D_CLASS\n}\n\nfunction isBitmap (object) {\n  return classString(object) === BITMAP_CLASS\n}\n\nfunction isImageElement (object) {\n  return classString(object) === IMAGE_CLASS\n}\n\nfunction isVideoElement (object) {\n  return classString(object) === VIDEO_CLASS\n}\n\nfunction isPixelData (object) {\n  if (!object) {\n    return false\n  }\n  var className = classString(object)\n  if (PIXEL_CLASSES.indexOf(className) >= 0) {\n    return true\n  }\n  return (\n    isNumericArray(object) ||\n    isRectArray(object) ||\n    isNDArrayLike(object))\n}\n\nfunction typedArrayCode$1 (data) {\n  return arrayTypes[Object.prototype.toString.call(data)] | 0\n}\n\nfunction convertData (result, data) {\n  var n = data.length\n  switch (result.type) {\n    case GL_UNSIGNED_BYTE$5:\n    case GL_UNSIGNED_SHORT$3:\n    case GL_UNSIGNED_INT$3:\n    case GL_FLOAT$4:\n      var converted = pool.allocType(result.type, n)\n      converted.set(data)\n      result.data = converted\n      break\n\n    case GL_HALF_FLOAT_OES$1:\n      result.data = convertToHalfFloat(data)\n      break\n\n    default:\n      check$1.raise('unsupported texture type, must specify a typed array')\n  }\n}\n\nfunction preConvert (image, n) {\n  return pool.allocType(\n    image.type === GL_HALF_FLOAT_OES$1\n      ? GL_FLOAT$4\n      : image.type, n)\n}\n\nfunction postConvert (image, data) {\n  if (image.type === GL_HALF_FLOAT_OES$1) {\n    image.data = convertToHalfFloat(data)\n    pool.freeType(data)\n  } else {\n    image.data = data\n  }\n}\n\nfunction transposeData (image, array, strideX, strideY, strideC, offset) {\n  var w = image.width\n  var h = image.height\n  var c = image.channels\n  var n = w * h * c\n  var data = preConvert(image, n)\n\n  var p = 0\n  for (var i = 0; i < h; ++i) {\n    for (var j = 0; j < w; ++j) {\n      for (var k = 0; k < c; ++k) {\n        data[p++] = array[strideX * j + strideY * i + strideC * k + offset]\n      }\n    }\n  }\n\n  postConvert(image, data)\n}\n\nfunction getTextureSize (format, type, width, height, isMipmap, isCube) {\n  var s\n  if (typeof FORMAT_SIZES_SPECIAL[format] !== 'undefined') {\n    // we have a special array for dealing with weird color formats such as RGB5A1\n    s = FORMAT_SIZES_SPECIAL[format]\n  } else {\n    s = FORMAT_CHANNELS[format] * TYPE_SIZES[type]\n  }\n\n  if (isCube) {\n    s *= 6\n  }\n\n  if (isMipmap) {\n    // compute the total size of all the mipmaps.\n    var total = 0\n\n    var w = width\n    while (w >= 1) {\n      // we can only use mipmaps on a square image,\n      // so we can simply use the width and ignore the height:\n      total += s * w * w\n      w /= 2\n    }\n    return total\n  } else {\n    return s * width * height\n  }\n}\n\nfunction createTextureSet (\n  gl, extensions, limits, reglPoll, contextState, stats, config) {\n  // -------------------------------------------------------\n  // Initialize constants and parameter tables here\n  // -------------------------------------------------------\n  var mipmapHint = {\n    \"don't care\": GL_DONT_CARE,\n    'dont care': GL_DONT_CARE,\n    'nice': GL_NICEST,\n    'fast': GL_FASTEST\n  }\n\n  var wrapModes = {\n    'repeat': GL_REPEAT,\n    'clamp': GL_CLAMP_TO_EDGE$1,\n    'mirror': GL_MIRRORED_REPEAT\n  }\n\n  var magFilters = {\n    'nearest': GL_NEAREST$1,\n    'linear': GL_LINEAR\n  }\n\n  var minFilters = extend({\n    'mipmap': GL_LINEAR_MIPMAP_LINEAR$1,\n    'nearest mipmap nearest': GL_NEAREST_MIPMAP_NEAREST$1,\n    'linear mipmap nearest': GL_LINEAR_MIPMAP_NEAREST$1,\n    'nearest mipmap linear': GL_NEAREST_MIPMAP_LINEAR$1,\n    'linear mipmap linear': GL_LINEAR_MIPMAP_LINEAR$1\n  }, magFilters)\n\n  var colorSpace = {\n    'none': 0,\n    'browser': GL_BROWSER_DEFAULT_WEBGL\n  }\n\n  var textureTypes = {\n    'uint8': GL_UNSIGNED_BYTE$5,\n    'rgba4': GL_UNSIGNED_SHORT_4_4_4_4$1,\n    'rgb565': GL_UNSIGNED_SHORT_5_6_5$1,\n    'rgb5 a1': GL_UNSIGNED_SHORT_5_5_5_1$1\n  }\n\n  var textureFormats = {\n    'alpha': GL_ALPHA,\n    'luminance': GL_LUMINANCE,\n    'luminance alpha': GL_LUMINANCE_ALPHA,\n    'rgb': GL_RGB,\n    'rgba': GL_RGBA$1,\n    'rgba4': GL_RGBA4,\n    'rgb5 a1': GL_RGB5_A1,\n    'rgb565': GL_RGB565\n  }\n\n  var compressedTextureFormats = {}\n\n  if (extensions.ext_srgb) {\n    textureFormats.srgb = GL_SRGB_EXT\n    textureFormats.srgba = GL_SRGB_ALPHA_EXT\n  }\n\n  if (extensions.oes_texture_float) {\n    textureTypes.float32 = textureTypes.float = GL_FLOAT$4\n  }\n\n  if (extensions.oes_texture_half_float) {\n    textureTypes['float16'] = textureTypes['half float'] = GL_HALF_FLOAT_OES$1\n  }\n\n  if (extensions.webgl_depth_texture) {\n    extend(textureFormats, {\n      'depth': GL_DEPTH_COMPONENT,\n      'depth stencil': GL_DEPTH_STENCIL\n    })\n\n    extend(textureTypes, {\n      'uint16': GL_UNSIGNED_SHORT$3,\n      'uint32': GL_UNSIGNED_INT$3,\n      'depth stencil': GL_UNSIGNED_INT_24_8_WEBGL$1\n    })\n  }\n\n  if (extensions.webgl_compressed_texture_s3tc) {\n    extend(compressedTextureFormats, {\n      'rgb s3tc dxt1': GL_COMPRESSED_RGB_S3TC_DXT1_EXT,\n      'rgba s3tc dxt1': GL_COMPRESSED_RGBA_S3TC_DXT1_EXT,\n      'rgba s3tc dxt3': GL_COMPRESSED_RGBA_S3TC_DXT3_EXT,\n      'rgba s3tc dxt5': GL_COMPRESSED_RGBA_S3TC_DXT5_EXT\n    })\n  }\n\n  if (extensions.webgl_compressed_texture_atc) {\n    extend(compressedTextureFormats, {\n      'rgb atc': GL_COMPRESSED_RGB_ATC_WEBGL,\n      'rgba atc explicit alpha': GL_COMPRESSED_RGBA_ATC_EXPLICIT_ALPHA_WEBGL,\n      'rgba atc interpolated alpha': GL_COMPRESSED_RGBA_ATC_INTERPOLATED_ALPHA_WEBGL\n    })\n  }\n\n  if (extensions.webgl_compressed_texture_pvrtc) {\n    extend(compressedTextureFormats, {\n      'rgb pvrtc 4bppv1': GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG,\n      'rgb pvrtc 2bppv1': GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG,\n      'rgba pvrtc 4bppv1': GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG,\n      'rgba pvrtc 2bppv1': GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG\n    })\n  }\n\n  if (extensions.webgl_compressed_texture_etc1) {\n    compressedTextureFormats['rgb etc1'] = GL_COMPRESSED_RGB_ETC1_WEBGL\n  }\n\n  // Copy over all texture formats\n  var supportedCompressedFormats = Array.prototype.slice.call(\n    gl.getParameter(GL_COMPRESSED_TEXTURE_FORMATS))\n  Object.keys(compressedTextureFormats).forEach(function (name) {\n    var format = compressedTextureFormats[name]\n    if (supportedCompressedFormats.indexOf(format) >= 0) {\n      textureFormats[name] = format\n    }\n  })\n\n  var supportedFormats = Object.keys(textureFormats)\n  limits.textureFormats = supportedFormats\n\n  // associate with every format string its\n  // corresponding GL-value.\n  var textureFormatsInvert = []\n  Object.keys(textureFormats).forEach(function (key) {\n    var val = textureFormats[key]\n    textureFormatsInvert[val] = key\n  })\n\n  // associate with every type string its\n  // corresponding GL-value.\n  var textureTypesInvert = []\n  Object.keys(textureTypes).forEach(function (key) {\n    var val = textureTypes[key]\n    textureTypesInvert[val] = key\n  })\n\n  var magFiltersInvert = []\n  Object.keys(magFilters).forEach(function (key) {\n    var val = magFilters[key]\n    magFiltersInvert[val] = key\n  })\n\n  var minFiltersInvert = []\n  Object.keys(minFilters).forEach(function (key) {\n    var val = minFilters[key]\n    minFiltersInvert[val] = key\n  })\n\n  var wrapModesInvert = []\n  Object.keys(wrapModes).forEach(function (key) {\n    var val = wrapModes[key]\n    wrapModesInvert[val] = key\n  })\n\n  // colorFormats[] gives the format (channels) associated to an\n  // internalformat\n  var colorFormats = supportedFormats.reduce(function (color, key) {\n    var glenum = textureFormats[key]\n    if (glenum === GL_LUMINANCE ||\n        glenum === GL_ALPHA ||\n        glenum === GL_LUMINANCE ||\n        glenum === GL_LUMINANCE_ALPHA ||\n        glenum === GL_DEPTH_COMPONENT ||\n        glenum === GL_DEPTH_STENCIL ||\n        (extensions.ext_srgb &&\n                (glenum === GL_SRGB_EXT ||\n                 glenum === GL_SRGB_ALPHA_EXT))) {\n      color[glenum] = glenum\n    } else if (glenum === GL_RGB5_A1 || key.indexOf('rgba') >= 0) {\n      color[glenum] = GL_RGBA$1\n    } else {\n      color[glenum] = GL_RGB\n    }\n    return color\n  }, {})\n\n  function TexFlags () {\n    // format info\n    this.internalformat = GL_RGBA$1\n    this.format = GL_RGBA$1\n    this.type = GL_UNSIGNED_BYTE$5\n    this.compressed = false\n\n    // pixel storage\n    this.premultiplyAlpha = false\n    this.flipY = false\n    this.unpackAlignment = 1\n    this.colorSpace = GL_BROWSER_DEFAULT_WEBGL\n\n    // shape info\n    this.width = 0\n    this.height = 0\n    this.channels = 0\n  }\n\n  function copyFlags (result, other) {\n    result.internalformat = other.internalformat\n    result.format = other.format\n    result.type = other.type\n    result.compressed = other.compressed\n\n    result.premultiplyAlpha = other.premultiplyAlpha\n    result.flipY = other.flipY\n    result.unpackAlignment = other.unpackAlignment\n    result.colorSpace = other.colorSpace\n\n    result.width = other.width\n    result.height = other.height\n    result.channels = other.channels\n  }\n\n  function parseFlags (flags, options) {\n    if (typeof options !== 'object' || !options) {\n      return\n    }\n\n    if ('premultiplyAlpha' in options) {\n      check$1.type(options.premultiplyAlpha, 'boolean',\n        'invalid premultiplyAlpha')\n      flags.premultiplyAlpha = options.premultiplyAlpha\n    }\n\n    if ('flipY' in options) {\n      check$1.type(options.flipY, 'boolean',\n        'invalid texture flip')\n      flags.flipY = options.flipY\n    }\n\n    if ('alignment' in options) {\n      check$1.oneOf(options.alignment, [1, 2, 4, 8],\n        'invalid texture unpack alignment')\n      flags.unpackAlignment = options.alignment\n    }\n\n    if ('colorSpace' in options) {\n      check$1.parameter(options.colorSpace, colorSpace,\n        'invalid colorSpace')\n      flags.colorSpace = colorSpace[options.colorSpace]\n    }\n\n    if ('type' in options) {\n      var type = options.type\n      check$1(extensions.oes_texture_float ||\n        !(type === 'float' || type === 'float32'),\n      'you must enable the OES_texture_float extension in order to use floating point textures.')\n      check$1(extensions.oes_texture_half_float ||\n        !(type === 'half float' || type === 'float16'),\n      'you must enable the OES_texture_half_float extension in order to use 16-bit floating point textures.')\n      check$1(extensions.webgl_depth_texture ||\n        !(type === 'uint16' || type === 'uint32' || type === 'depth stencil'),\n      'you must enable the WEBGL_depth_texture extension in order to use depth/stencil textures.')\n      check$1.parameter(type, textureTypes,\n        'invalid texture type')\n      flags.type = textureTypes[type]\n    }\n\n    var w = flags.width\n    var h = flags.height\n    var c = flags.channels\n    var hasChannels = false\n    if ('shape' in options) {\n      check$1(Array.isArray(options.shape) && options.shape.length >= 2,\n        'shape must be an array')\n      w = options.shape[0]\n      h = options.shape[1]\n      if (options.shape.length === 3) {\n        c = options.shape[2]\n        check$1(c > 0 && c <= 4, 'invalid number of channels')\n        hasChannels = true\n      }\n      check$1(w >= 0 && w <= limits.maxTextureSize, 'invalid width')\n      check$1(h >= 0 && h <= limits.maxTextureSize, 'invalid height')\n    } else {\n      if ('radius' in options) {\n        w = h = options.radius\n        check$1(w >= 0 && w <= limits.maxTextureSize, 'invalid radius')\n      }\n      if ('width' in options) {\n        w = options.width\n        check$1(w >= 0 && w <= limits.maxTextureSize, 'invalid width')\n      }\n      if ('height' in options) {\n        h = options.height\n        check$1(h >= 0 && h <= limits.maxTextureSize, 'invalid height')\n      }\n      if ('channels' in options) {\n        c = options.channels\n        check$1(c > 0 && c <= 4, 'invalid number of channels')\n        hasChannels = true\n      }\n    }\n    flags.width = w | 0\n    flags.height = h | 0\n    flags.channels = c | 0\n\n    var hasFormat = false\n    if ('format' in options) {\n      var formatStr = options.format\n      check$1(extensions.webgl_depth_texture ||\n        !(formatStr === 'depth' || formatStr === 'depth stencil'),\n      'you must enable the WEBGL_depth_texture extension in order to use depth/stencil textures.')\n      check$1.parameter(formatStr, textureFormats,\n        'invalid texture format')\n      var internalformat = flags.internalformat = textureFormats[formatStr]\n      flags.format = colorFormats[internalformat]\n      if (formatStr in textureTypes) {\n        if (!('type' in options)) {\n          flags.type = textureTypes[formatStr]\n        }\n      }\n      if (formatStr in compressedTextureFormats) {\n        flags.compressed = true\n      }\n      hasFormat = true\n    }\n\n    // Reconcile channels and format\n    if (!hasChannels && hasFormat) {\n      flags.channels = FORMAT_CHANNELS[flags.format]\n    } else if (hasChannels && !hasFormat) {\n      if (flags.channels !== CHANNELS_FORMAT[flags.format]) {\n        flags.format = flags.internalformat = CHANNELS_FORMAT[flags.channels]\n      }\n    } else if (hasFormat && hasChannels) {\n      check$1(\n        flags.channels === FORMAT_CHANNELS[flags.format],\n        'number of channels inconsistent with specified format')\n    }\n  }\n\n  function setFlags (flags) {\n    gl.pixelStorei(GL_UNPACK_FLIP_Y_WEBGL, flags.flipY)\n    gl.pixelStorei(GL_UNPACK_PREMULTIPLY_ALPHA_WEBGL, flags.premultiplyAlpha)\n    gl.pixelStorei(GL_UNPACK_COLORSPACE_CONVERSION_WEBGL, flags.colorSpace)\n    gl.pixelStorei(GL_UNPACK_ALIGNMENT, flags.unpackAlignment)\n  }\n\n  // -------------------------------------------------------\n  // Tex image data\n  // -------------------------------------------------------\n  function TexImage () {\n    TexFlags.call(this)\n\n    this.xOffset = 0\n    this.yOffset = 0\n\n    // data\n    this.data = null\n    this.needsFree = false\n\n    // html element\n    this.element = null\n\n    // copyTexImage info\n    this.needsCopy = false\n  }\n\n  function parseImage (image, options) {\n    var data = null\n    if (isPixelData(options)) {\n      data = options\n    } else if (options) {\n      check$1.type(options, 'object', 'invalid pixel data type')\n      parseFlags(image, options)\n      if ('x' in options) {\n        image.xOffset = options.x | 0\n      }\n      if ('y' in options) {\n        image.yOffset = options.y | 0\n      }\n      if (isPixelData(options.data)) {\n        data = options.data\n      }\n    }\n\n    check$1(\n      !image.compressed ||\n      data instanceof Uint8Array,\n      'compressed texture data must be stored in a uint8array')\n\n    if (options.copy) {\n      check$1(!data, 'can not specify copy and data field for the same texture')\n      var viewW = contextState.viewportWidth\n      var viewH = contextState.viewportHeight\n      image.width = image.width || (viewW - image.xOffset)\n      image.height = image.height || (viewH - image.yOffset)\n      image.needsCopy = true\n      check$1(image.xOffset >= 0 && image.xOffset < viewW &&\n            image.yOffset >= 0 && image.yOffset < viewH &&\n            image.width > 0 && image.width <= viewW &&\n            image.height > 0 && image.height <= viewH,\n      'copy texture read out of bounds')\n    } else if (!data) {\n      image.width = image.width || 1\n      image.height = image.height || 1\n      image.channels = image.channels || 4\n    } else if (isTypedArray(data)) {\n      image.channels = image.channels || 4\n      image.data = data\n      if (!('type' in options) && image.type === GL_UNSIGNED_BYTE$5) {\n        image.type = typedArrayCode$1(data)\n      }\n    } else if (isNumericArray(data)) {\n      image.channels = image.channels || 4\n      convertData(image, data)\n      image.alignment = 1\n      image.needsFree = true\n    } else if (isNDArrayLike(data)) {\n      var array = data.data\n      if (!Array.isArray(array) && image.type === GL_UNSIGNED_BYTE$5) {\n        image.type = typedArrayCode$1(array)\n      }\n      var shape = data.shape\n      var stride = data.stride\n      var shapeX, shapeY, shapeC, strideX, strideY, strideC\n      if (shape.length === 3) {\n        shapeC = shape[2]\n        strideC = stride[2]\n      } else {\n        check$1(shape.length === 2, 'invalid ndarray pixel data, must be 2 or 3D')\n        shapeC = 1\n        strideC = 1\n      }\n      shapeX = shape[0]\n      shapeY = shape[1]\n      strideX = stride[0]\n      strideY = stride[1]\n      image.alignment = 1\n      image.width = shapeX\n      image.height = shapeY\n      image.channels = shapeC\n      image.format = image.internalformat = CHANNELS_FORMAT[shapeC]\n      image.needsFree = true\n      transposeData(image, array, strideX, strideY, strideC, data.offset)\n    } else if (isCanvasElement(data) || isOffscreenCanvas(data) || isContext2D(data)) {\n      if (isCanvasElement(data) || isOffscreenCanvas(data)) {\n        image.element = data\n      } else {\n        image.element = data.canvas\n      }\n      image.width = image.element.width\n      image.height = image.element.height\n      image.channels = 4\n    } else if (isBitmap(data)) {\n      image.element = data\n      image.width = data.width\n      image.height = data.height\n      image.channels = 4\n    } else if (isImageElement(data)) {\n      image.element = data\n      image.width = data.naturalWidth\n      image.height = data.naturalHeight\n      image.channels = 4\n    } else if (isVideoElement(data)) {\n      image.element = data\n      image.width = data.videoWidth\n      image.height = data.videoHeight\n      image.channels = 4\n    } else if (isRectArray(data)) {\n      var w = image.width || data[0].length\n      var h = image.height || data.length\n      var c = image.channels\n      if (isArrayLike(data[0][0])) {\n        c = c || data[0][0].length\n      } else {\n        c = c || 1\n      }\n      var arrayShape = flattenUtils.shape(data)\n      var n = 1\n      for (var dd = 0; dd < arrayShape.length; ++dd) {\n        n *= arrayShape[dd]\n      }\n      var allocData = preConvert(image, n)\n      flattenUtils.flatten(data, arrayShape, '', allocData)\n      postConvert(image, allocData)\n      image.alignment = 1\n      image.width = w\n      image.height = h\n      image.channels = c\n      image.format = image.internalformat = CHANNELS_FORMAT[c]\n      image.needsFree = true\n    }\n\n    if (image.type === GL_FLOAT$4) {\n      check$1(limits.extensions.indexOf('oes_texture_float') >= 0,\n        'oes_texture_float extension not enabled')\n    } else if (image.type === GL_HALF_FLOAT_OES$1) {\n      check$1(limits.extensions.indexOf('oes_texture_half_float') >= 0,\n        'oes_texture_half_float extension not enabled')\n    }\n\n    // do compressed texture  validation here.\n  }\n\n  function setImage (info, target, miplevel) {\n    var element = info.element\n    var data = info.data\n    var internalformat = info.internalformat\n    var format = info.format\n    var type = info.type\n    var width = info.width\n    var height = info.height\n\n    setFlags(info)\n\n    if (element) {\n      gl.texImage2D(target, miplevel, format, format, type, element)\n    } else if (info.compressed) {\n      gl.compressedTexImage2D(target, miplevel, internalformat, width, height, 0, data)\n    } else if (info.needsCopy) {\n      reglPoll()\n      gl.copyTexImage2D(\n        target, miplevel, format, info.xOffset, info.yOffset, width, height, 0)\n    } else {\n      gl.texImage2D(target, miplevel, format, width, height, 0, format, type, data || null)\n    }\n  }\n\n  function setSubImage (info, target, x, y, miplevel) {\n    var element = info.element\n    var data = info.data\n    var internalformat = info.internalformat\n    var format = info.format\n    var type = info.type\n    var width = info.width\n    var height = info.height\n\n    setFlags(info)\n\n    if (element) {\n      gl.texSubImage2D(\n        target, miplevel, x, y, format, type, element)\n    } else if (info.compressed) {\n      gl.compressedTexSubImage2D(\n        target, miplevel, x, y, internalformat, width, height, data)\n    } else if (info.needsCopy) {\n      reglPoll()\n      gl.copyTexSubImage2D(\n        target, miplevel, x, y, info.xOffset, info.yOffset, width, height)\n    } else {\n      gl.texSubImage2D(\n        target, miplevel, x, y, width, height, format, type, data)\n    }\n  }\n\n  // texImage pool\n  var imagePool = []\n\n  function allocImage () {\n    return imagePool.pop() || new TexImage()\n  }\n\n  function freeImage (image) {\n    if (image.needsFree) {\n      pool.freeType(image.data)\n    }\n    TexImage.call(image)\n    imagePool.push(image)\n  }\n\n  // -------------------------------------------------------\n  // Mip map\n  // -------------------------------------------------------\n  function MipMap () {\n    TexFlags.call(this)\n\n    this.genMipmaps = false\n    this.mipmapHint = GL_DONT_CARE\n    this.mipmask = 0\n    this.images = Array(16)\n  }\n\n  function parseMipMapFromShape (mipmap, width, height) {\n    var img = mipmap.images[0] = allocImage()\n    mipmap.mipmask = 1\n    img.width = mipmap.width = width\n    img.height = mipmap.height = height\n    img.channels = mipmap.channels = 4\n  }\n\n  function parseMipMapFromObject (mipmap, options) {\n    var imgData = null\n    if (isPixelData(options)) {\n      imgData = mipmap.images[0] = allocImage()\n      copyFlags(imgData, mipmap)\n      parseImage(imgData, options)\n      mipmap.mipmask = 1\n    } else {\n      parseFlags(mipmap, options)\n      if (Array.isArray(options.mipmap)) {\n        var mipData = options.mipmap\n        for (var i = 0; i < mipData.length; ++i) {\n          imgData = mipmap.images[i] = allocImage()\n          copyFlags(imgData, mipmap)\n          imgData.width >>= i\n          imgData.height >>= i\n          parseImage(imgData, mipData[i])\n          mipmap.mipmask |= (1 << i)\n        }\n      } else {\n        imgData = mipmap.images[0] = allocImage()\n        copyFlags(imgData, mipmap)\n        parseImage(imgData, options)\n        mipmap.mipmask = 1\n      }\n    }\n    copyFlags(mipmap, mipmap.images[0])\n\n    // For textures of the compressed format WEBGL_compressed_texture_s3tc\n    // we must have that\n    //\n    // \"When level equals zero width and height must be a multiple of 4.\n    // When level is greater than 0 width and height must be 0, 1, 2 or a multiple of 4. \"\n    //\n    // but we do not yet support having multiple mipmap levels for compressed textures,\n    // so we only test for level zero.\n\n    if (\n      mipmap.compressed &&\n      (\n        mipmap.internalformat === GL_COMPRESSED_RGB_S3TC_DXT1_EXT ||\n        mipmap.internalformat === GL_COMPRESSED_RGBA_S3TC_DXT1_EXT ||\n        mipmap.internalformat === GL_COMPRESSED_RGBA_S3TC_DXT3_EXT ||\n        mipmap.internalformat === GL_COMPRESSED_RGBA_S3TC_DXT5_EXT\n      )\n    ) {\n      check$1(mipmap.width % 4 === 0 && mipmap.height % 4 === 0,\n        'for compressed texture formats, mipmap level 0 must have width and height that are a multiple of 4')\n    }\n  }\n\n  function setMipMap (mipmap, target) {\n    var images = mipmap.images\n    for (var i = 0; i < images.length; ++i) {\n      if (!images[i]) {\n        return\n      }\n      setImage(images[i], target, i)\n    }\n  }\n\n  var mipPool = []\n\n  function allocMipMap () {\n    var result = mipPool.pop() || new MipMap()\n    TexFlags.call(result)\n    result.mipmask = 0\n    for (var i = 0; i < 16; ++i) {\n      result.images[i] = null\n    }\n    return result\n  }\n\n  function freeMipMap (mipmap) {\n    var images = mipmap.images\n    for (var i = 0; i < images.length; ++i) {\n      if (images[i]) {\n        freeImage(images[i])\n      }\n      images[i] = null\n    }\n    mipPool.push(mipmap)\n  }\n\n  // -------------------------------------------------------\n  // Tex info\n  // -------------------------------------------------------\n  function TexInfo () {\n    this.minFilter = GL_NEAREST$1\n    this.magFilter = GL_NEAREST$1\n\n    this.wrapS = GL_CLAMP_TO_EDGE$1\n    this.wrapT = GL_CLAMP_TO_EDGE$1\n\n    this.anisotropic = 1\n\n    this.genMipmaps = false\n    this.mipmapHint = GL_DONT_CARE\n  }\n\n  function parseTexInfo (info, options) {\n    if ('min' in options) {\n      var minFilter = options.min\n      check$1.parameter(minFilter, minFilters)\n      info.minFilter = minFilters[minFilter]\n      if (MIPMAP_FILTERS.indexOf(info.minFilter) >= 0 && !('faces' in options)) {\n        info.genMipmaps = true\n      }\n    }\n\n    if ('mag' in options) {\n      var magFilter = options.mag\n      check$1.parameter(magFilter, magFilters)\n      info.magFilter = magFilters[magFilter]\n    }\n\n    var wrapS = info.wrapS\n    var wrapT = info.wrapT\n    if ('wrap' in options) {\n      var wrap = options.wrap\n      if (typeof wrap === 'string') {\n        check$1.parameter(wrap, wrapModes)\n        wrapS = wrapT = wrapModes[wrap]\n      } else if (Array.isArray(wrap)) {\n        check$1.parameter(wrap[0], wrapModes)\n        check$1.parameter(wrap[1], wrapModes)\n        wrapS = wrapModes[wrap[0]]\n        wrapT = wrapModes[wrap[1]]\n      }\n    } else {\n      if ('wrapS' in options) {\n        var optWrapS = options.wrapS\n        check$1.parameter(optWrapS, wrapModes)\n        wrapS = wrapModes[optWrapS]\n      }\n      if ('wrapT' in options) {\n        var optWrapT = options.wrapT\n        check$1.parameter(optWrapT, wrapModes)\n        wrapT = wrapModes[optWrapT]\n      }\n    }\n    info.wrapS = wrapS\n    info.wrapT = wrapT\n\n    if ('anisotropic' in options) {\n      var anisotropic = options.anisotropic\n      check$1(typeof anisotropic === 'number' &&\n         anisotropic >= 1 && anisotropic <= limits.maxAnisotropic,\n      'aniso samples must be between 1 and ')\n      info.anisotropic = options.anisotropic\n    }\n\n    if ('mipmap' in options) {\n      var hasMipMap = false\n      switch (typeof options.mipmap) {\n        case 'string':\n          check$1.parameter(options.mipmap, mipmapHint,\n            'invalid mipmap hint')\n          info.mipmapHint = mipmapHint[options.mipmap]\n          info.genMipmaps = true\n          hasMipMap = true\n          break\n\n        case 'boolean':\n          hasMipMap = info.genMipmaps = options.mipmap\n          break\n\n        case 'object':\n          check$1(Array.isArray(options.mipmap), 'invalid mipmap type')\n          info.genMipmaps = false\n          hasMipMap = true\n          break\n\n        default:\n          check$1.raise('invalid mipmap type')\n      }\n      if (hasMipMap && !('min' in options)) {\n        info.minFilter = GL_NEAREST_MIPMAP_NEAREST$1\n      }\n    }\n  }\n\n  function setTexInfo (info, target) {\n    gl.texParameteri(target, GL_TEXTURE_MIN_FILTER, info.minFilter)\n    gl.texParameteri(target, GL_TEXTURE_MAG_FILTER, info.magFilter)\n    gl.texParameteri(target, GL_TEXTURE_WRAP_S, info.wrapS)\n    gl.texParameteri(target, GL_TEXTURE_WRAP_T, info.wrapT)\n    if (extensions.ext_texture_filter_anisotropic) {\n      gl.texParameteri(target, GL_TEXTURE_MAX_ANISOTROPY_EXT, info.anisotropic)\n    }\n    if (info.genMipmaps) {\n      gl.hint(GL_GENERATE_MIPMAP_HINT, info.mipmapHint)\n      gl.generateMipmap(target)\n    }\n  }\n\n  // -------------------------------------------------------\n  // Full texture object\n  // -------------------------------------------------------\n  var textureCount = 0\n  var textureSet = {}\n  var numTexUnits = limits.maxTextureUnits\n  var textureUnits = Array(numTexUnits).map(function () {\n    return null\n  })\n\n  function REGLTexture (target) {\n    TexFlags.call(this)\n    this.mipmask = 0\n    this.internalformat = GL_RGBA$1\n\n    this.id = textureCount++\n\n    this.refCount = 1\n\n    this.target = target\n    this.texture = gl.createTexture()\n\n    this.unit = -1\n    this.bindCount = 0\n\n    this.texInfo = new TexInfo()\n\n    if (config.profile) {\n      this.stats = { size: 0 }\n    }\n  }\n\n  function tempBind (texture) {\n    gl.activeTexture(GL_TEXTURE0$1)\n    gl.bindTexture(texture.target, texture.texture)\n  }\n\n  function tempRestore () {\n    var prev = textureUnits[0]\n    if (prev) {\n      gl.bindTexture(prev.target, prev.texture)\n    } else {\n      gl.bindTexture(GL_TEXTURE_2D$1, null)\n    }\n  }\n\n  function destroy (texture) {\n    var handle = texture.texture\n    check$1(handle, 'must not double destroy texture')\n    var unit = texture.unit\n    var target = texture.target\n    if (unit >= 0) {\n      gl.activeTexture(GL_TEXTURE0$1 + unit)\n      gl.bindTexture(target, null)\n      textureUnits[unit] = null\n    }\n    gl.deleteTexture(handle)\n    texture.texture = null\n    texture.params = null\n    texture.pixels = null\n    texture.refCount = 0\n    delete textureSet[texture.id]\n    stats.textureCount--\n  }\n\n  extend(REGLTexture.prototype, {\n    bind: function () {\n      var texture = this\n      texture.bindCount += 1\n      var unit = texture.unit\n      if (unit < 0) {\n        for (var i = 0; i < numTexUnits; ++i) {\n          var other = textureUnits[i]\n          if (other) {\n            if (other.bindCount > 0) {\n              continue\n            }\n            other.unit = -1\n          }\n          textureUnits[i] = texture\n          unit = i\n          break\n        }\n        if (unit >= numTexUnits) {\n          check$1.raise('insufficient number of texture units')\n        }\n        if (config.profile && stats.maxTextureUnits < (unit + 1)) {\n          stats.maxTextureUnits = unit + 1 // +1, since the units are zero-based\n        }\n        texture.unit = unit\n        gl.activeTexture(GL_TEXTURE0$1 + unit)\n        gl.bindTexture(texture.target, texture.texture)\n      }\n      return unit\n    },\n\n    unbind: function () {\n      this.bindCount -= 1\n    },\n\n    decRef: function () {\n      if (--this.refCount <= 0) {\n        destroy(this)\n      }\n    }\n  })\n\n  function createTexture2D (a, b) {\n    var texture = new REGLTexture(GL_TEXTURE_2D$1)\n    textureSet[texture.id] = texture\n    stats.textureCount++\n\n    function reglTexture2D (a, b) {\n      var texInfo = texture.texInfo\n      TexInfo.call(texInfo)\n      var mipData = allocMipMap()\n\n      if (typeof a === 'number') {\n        if (typeof b === 'number') {\n          parseMipMapFromShape(mipData, a | 0, b | 0)\n        } else {\n          parseMipMapFromShape(mipData, a | 0, a | 0)\n        }\n      } else if (a) {\n        check$1.type(a, 'object', 'invalid arguments to regl.texture')\n        parseTexInfo(texInfo, a)\n        parseMipMapFromObject(mipData, a)\n      } else {\n        // empty textures get assigned a default shape of 1x1\n        parseMipMapFromShape(mipData, 1, 1)\n      }\n\n      if (texInfo.genMipmaps) {\n        mipData.mipmask = (mipData.width << 1) - 1\n      }\n      texture.mipmask = mipData.mipmask\n\n      copyFlags(texture, mipData)\n\n      check$1.texture2D(texInfo, mipData, limits)\n      texture.internalformat = mipData.internalformat\n\n      reglTexture2D.width = mipData.width\n      reglTexture2D.height = mipData.height\n\n      tempBind(texture)\n      setMipMap(mipData, GL_TEXTURE_2D$1)\n      setTexInfo(texInfo, GL_TEXTURE_2D$1)\n      tempRestore()\n\n      freeMipMap(mipData)\n\n      if (config.profile) {\n        texture.stats.size = getTextureSize(\n          texture.internalformat,\n          texture.type,\n          mipData.width,\n          mipData.height,\n          texInfo.genMipmaps,\n          false)\n      }\n      reglTexture2D.format = textureFormatsInvert[texture.internalformat]\n      reglTexture2D.type = textureTypesInvert[texture.type]\n\n      reglTexture2D.mag = magFiltersInvert[texInfo.magFilter]\n      reglTexture2D.min = minFiltersInvert[texInfo.minFilter]\n\n      reglTexture2D.wrapS = wrapModesInvert[texInfo.wrapS]\n      reglTexture2D.wrapT = wrapModesInvert[texInfo.wrapT]\n\n      return reglTexture2D\n    }\n\n    function subimage (image, x_, y_, level_) {\n      check$1(!!image, 'must specify image data')\n\n      var x = x_ | 0\n      var y = y_ | 0\n      var level = level_ | 0\n\n      var imageData = allocImage()\n      copyFlags(imageData, texture)\n      imageData.width = 0\n      imageData.height = 0\n      parseImage(imageData, image)\n      imageData.width = imageData.width || ((texture.width >> level) - x)\n      imageData.height = imageData.height || ((texture.height >> level) - y)\n\n      check$1(\n        texture.type === imageData.type &&\n        texture.format === imageData.format &&\n        texture.internalformat === imageData.internalformat,\n        'incompatible format for texture.subimage')\n      check$1(\n        x >= 0 && y >= 0 &&\n        x + imageData.width <= texture.width &&\n        y + imageData.height <= texture.height,\n        'texture.subimage write out of bounds')\n      check$1(\n        texture.mipmask & (1 << level),\n        'missing mipmap data')\n      check$1(\n        imageData.data || imageData.element || imageData.needsCopy,\n        'missing image data')\n\n      tempBind(texture)\n      setSubImage(imageData, GL_TEXTURE_2D$1, x, y, level)\n      tempRestore()\n\n      freeImage(imageData)\n\n      return reglTexture2D\n    }\n\n    function resize (w_, h_) {\n      var w = w_ | 0\n      var h = (h_ | 0) || w\n      if (w === texture.width && h === texture.height) {\n        return reglTexture2D\n      }\n\n      reglTexture2D.width = texture.width = w\n      reglTexture2D.height = texture.height = h\n\n      tempBind(texture)\n\n      for (var i = 0; texture.mipmask >> i; ++i) {\n        var _w = w >> i\n        var _h = h >> i\n        if (!_w || !_h) break\n        gl.texImage2D(\n          GL_TEXTURE_2D$1,\n          i,\n          texture.format,\n          _w,\n          _h,\n          0,\n          texture.format,\n          texture.type,\n          null)\n      }\n      tempRestore()\n\n      // also, recompute the texture size.\n      if (config.profile) {\n        texture.stats.size = getTextureSize(\n          texture.internalformat,\n          texture.type,\n          w,\n          h,\n          false,\n          false)\n      }\n\n      return reglTexture2D\n    }\n\n    reglTexture2D(a, b)\n\n    reglTexture2D.subimage = subimage\n    reglTexture2D.resize = resize\n    reglTexture2D._reglType = 'texture2d'\n    reglTexture2D._texture = texture\n    if (config.profile) {\n      reglTexture2D.stats = texture.stats\n    }\n    reglTexture2D.destroy = function () {\n      texture.decRef()\n    }\n\n    return reglTexture2D\n  }\n\n  function createTextureCube (a0, a1, a2, a3, a4, a5) {\n    var texture = new REGLTexture(GL_TEXTURE_CUBE_MAP$1)\n    textureSet[texture.id] = texture\n    stats.cubeCount++\n\n    var faces = new Array(6)\n\n    function reglTextureCube (a0, a1, a2, a3, a4, a5) {\n      var i\n      var texInfo = texture.texInfo\n      TexInfo.call(texInfo)\n      for (i = 0; i < 6; ++i) {\n        faces[i] = allocMipMap()\n      }\n\n      if (typeof a0 === 'number' || !a0) {\n        var s = (a0 | 0) || 1\n        for (i = 0; i < 6; ++i) {\n          parseMipMapFromShape(faces[i], s, s)\n        }\n      } else if (typeof a0 === 'object') {\n        if (a1) {\n          parseMipMapFromObject(faces[0], a0)\n          parseMipMapFromObject(faces[1], a1)\n          parseMipMapFromObject(faces[2], a2)\n          parseMipMapFromObject(faces[3], a3)\n          parseMipMapFromObject(faces[4], a4)\n          parseMipMapFromObject(faces[5], a5)\n        } else {\n          parseTexInfo(texInfo, a0)\n          parseFlags(texture, a0)\n          if ('faces' in a0) {\n            var faceInput = a0.faces\n            check$1(Array.isArray(faceInput) && faceInput.length === 6,\n              'cube faces must be a length 6 array')\n            for (i = 0; i < 6; ++i) {\n              check$1(typeof faceInput[i] === 'object' && !!faceInput[i],\n                'invalid input for cube map face')\n              copyFlags(faces[i], texture)\n              parseMipMapFromObject(faces[i], faceInput[i])\n            }\n          } else {\n            for (i = 0; i < 6; ++i) {\n              parseMipMapFromObject(faces[i], a0)\n            }\n          }\n        }\n      } else {\n        check$1.raise('invalid arguments to cube map')\n      }\n\n      copyFlags(texture, faces[0])\n\n      if (!limits.npotTextureCube) {\n        check$1(isPow2$1(texture.width) && isPow2$1(texture.height), 'your browser does not support non power or two texture dimensions')\n      }\n\n      if (texInfo.genMipmaps) {\n        texture.mipmask = (faces[0].width << 1) - 1\n      } else {\n        texture.mipmask = faces[0].mipmask\n      }\n\n      check$1.textureCube(texture, texInfo, faces, limits)\n      texture.internalformat = faces[0].internalformat\n\n      reglTextureCube.width = faces[0].width\n      reglTextureCube.height = faces[0].height\n\n      tempBind(texture)\n      for (i = 0; i < 6; ++i) {\n        setMipMap(faces[i], GL_TEXTURE_CUBE_MAP_POSITIVE_X$1 + i)\n      }\n      setTexInfo(texInfo, GL_TEXTURE_CUBE_MAP$1)\n      tempRestore()\n\n      if (config.profile) {\n        texture.stats.size = getTextureSize(\n          texture.internalformat,\n          texture.type,\n          reglTextureCube.width,\n          reglTextureCube.height,\n          texInfo.genMipmaps,\n          true)\n      }\n\n      reglTextureCube.format = textureFormatsInvert[texture.internalformat]\n      reglTextureCube.type = textureTypesInvert[texture.type]\n\n      reglTextureCube.mag = magFiltersInvert[texInfo.magFilter]\n      reglTextureCube.min = minFiltersInvert[texInfo.minFilter]\n\n      reglTextureCube.wrapS = wrapModesInvert[texInfo.wrapS]\n      reglTextureCube.wrapT = wrapModesInvert[texInfo.wrapT]\n\n      for (i = 0; i < 6; ++i) {\n        freeMipMap(faces[i])\n      }\n\n      return reglTextureCube\n    }\n\n    function subimage (face, image, x_, y_, level_) {\n      check$1(!!image, 'must specify image data')\n      check$1(typeof face === 'number' && face === (face | 0) &&\n        face >= 0 && face < 6, 'invalid face')\n\n      var x = x_ | 0\n      var y = y_ | 0\n      var level = level_ | 0\n\n      var imageData = allocImage()\n      copyFlags(imageData, texture)\n      imageData.width = 0\n      imageData.height = 0\n      parseImage(imageData, image)\n      imageData.width = imageData.width || ((texture.width >> level) - x)\n      imageData.height = imageData.height || ((texture.height >> level) - y)\n\n      check$1(\n        texture.type === imageData.type &&\n        texture.format === imageData.format &&\n        texture.internalformat === imageData.internalformat,\n        'incompatible format for texture.subimage')\n      check$1(\n        x >= 0 && y >= 0 &&\n        x + imageData.width <= texture.width &&\n        y + imageData.height <= texture.height,\n        'texture.subimage write out of bounds')\n      check$1(\n        texture.mipmask & (1 << level),\n        'missing mipmap data')\n      check$1(\n        imageData.data || imageData.element || imageData.needsCopy,\n        'missing image data')\n\n      tempBind(texture)\n      setSubImage(imageData, GL_TEXTURE_CUBE_MAP_POSITIVE_X$1 + face, x, y, level)\n      tempRestore()\n\n      freeImage(imageData)\n\n      return reglTextureCube\n    }\n\n    function resize (radius_) {\n      var radius = radius_ | 0\n      if (radius === texture.width) {\n        return\n      }\n\n      reglTextureCube.width = texture.width = radius\n      reglTextureCube.height = texture.height = radius\n\n      tempBind(texture)\n      for (var i = 0; i < 6; ++i) {\n        for (var j = 0; texture.mipmask >> j; ++j) {\n          gl.texImage2D(\n            GL_TEXTURE_CUBE_MAP_POSITIVE_X$1 + i,\n            j,\n            texture.format,\n            radius >> j,\n            radius >> j,\n            0,\n            texture.format,\n            texture.type,\n            null)\n        }\n      }\n      tempRestore()\n\n      if (config.profile) {\n        texture.stats.size = getTextureSize(\n          texture.internalformat,\n          texture.type,\n          reglTextureCube.width,\n          reglTextureCube.height,\n          false,\n          true)\n      }\n\n      return reglTextureCube\n    }\n\n    reglTextureCube(a0, a1, a2, a3, a4, a5)\n\n    reglTextureCube.subimage = subimage\n    reglTextureCube.resize = resize\n    reglTextureCube._reglType = 'textureCube'\n    reglTextureCube._texture = texture\n    if (config.profile) {\n      reglTextureCube.stats = texture.stats\n    }\n    reglTextureCube.destroy = function () {\n      texture.decRef()\n    }\n\n    return reglTextureCube\n  }\n\n  // Called when regl is destroyed\n  function destroyTextures () {\n    for (var i = 0; i < numTexUnits; ++i) {\n      gl.activeTexture(GL_TEXTURE0$1 + i)\n      gl.bindTexture(GL_TEXTURE_2D$1, null)\n      textureUnits[i] = null\n    }\n    values(textureSet).forEach(destroy)\n\n    stats.cubeCount = 0\n    stats.textureCount = 0\n  }\n\n  if (config.profile) {\n    stats.getTotalTextureSize = function () {\n      var total = 0\n      Object.keys(textureSet).forEach(function (key) {\n        total += textureSet[key].stats.size\n      })\n      return total\n    }\n  }\n\n  function restoreTextures () {\n    for (var i = 0; i < numTexUnits; ++i) {\n      var tex = textureUnits[i]\n      if (tex) {\n        tex.bindCount = 0\n        tex.unit = -1\n        textureUnits[i] = null\n      }\n    }\n\n    values(textureSet).forEach(function (texture) {\n      texture.texture = gl.createTexture()\n      gl.bindTexture(texture.target, texture.texture)\n      for (var i = 0; i < 32; ++i) {\n        if ((texture.mipmask & (1 << i)) === 0) {\n          continue\n        }\n        if (texture.target === GL_TEXTURE_2D$1) {\n          gl.texImage2D(GL_TEXTURE_2D$1,\n            i,\n            texture.internalformat,\n            texture.width >> i,\n            texture.height >> i,\n            0,\n            texture.internalformat,\n            texture.type,\n            null)\n        } else {\n          for (var j = 0; j < 6; ++j) {\n            gl.texImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X$1 + j,\n              i,\n              texture.internalformat,\n              texture.width >> i,\n              texture.height >> i,\n              0,\n              texture.internalformat,\n              texture.type,\n              null)\n          }\n        }\n      }\n      setTexInfo(texture.texInfo, texture.target)\n    })\n  }\n\n  function refreshTextures () {\n    for (var i = 0; i < numTexUnits; ++i) {\n      var tex = textureUnits[i]\n      if (tex) {\n        tex.bindCount = 0\n        tex.unit = -1\n        textureUnits[i] = null\n      }\n      gl.activeTexture(GL_TEXTURE0$1 + i)\n      gl.bindTexture(GL_TEXTURE_2D$1, null)\n      gl.bindTexture(GL_TEXTURE_CUBE_MAP$1, null)\n    }\n  }\n\n  return {\n    create2D: createTexture2D,\n    createCube: createTextureCube,\n    clear: destroyTextures,\n    getTexture: function (wrapper) {\n      return null\n    },\n    restore: restoreTextures,\n    refresh: refreshTextures\n  }\n}\n\nvar GL_RENDERBUFFER = 0x8D41\n\nvar GL_RGBA4$1 = 0x8056\nvar GL_RGB5_A1$1 = 0x8057\nvar GL_RGB565$1 = 0x8D62\nvar GL_DEPTH_COMPONENT16 = 0x81A5\nvar GL_STENCIL_INDEX8 = 0x8D48\nvar GL_DEPTH_STENCIL$1 = 0x84F9\n\nvar GL_SRGB8_ALPHA8_EXT = 0x8C43\n\nvar GL_RGBA32F_EXT = 0x8814\n\nvar GL_RGBA16F_EXT = 0x881A\nvar GL_RGB16F_EXT = 0x881B\n\nvar FORMAT_SIZES = []\n\nFORMAT_SIZES[GL_RGBA4$1] = 2\nFORMAT_SIZES[GL_RGB5_A1$1] = 2\nFORMAT_SIZES[GL_RGB565$1] = 2\n\nFORMAT_SIZES[GL_DEPTH_COMPONENT16] = 2\nFORMAT_SIZES[GL_STENCIL_INDEX8] = 1\nFORMAT_SIZES[GL_DEPTH_STENCIL$1] = 4\n\nFORMAT_SIZES[GL_SRGB8_ALPHA8_EXT] = 4\nFORMAT_SIZES[GL_RGBA32F_EXT] = 16\nFORMAT_SIZES[GL_RGBA16F_EXT] = 8\nFORMAT_SIZES[GL_RGB16F_EXT] = 6\n\nfunction getRenderbufferSize (format, width, height) {\n  return FORMAT_SIZES[format] * width * height\n}\n\nvar wrapRenderbuffers = function (gl, extensions, limits, stats, config) {\n  var formatTypes = {\n    'rgba4': GL_RGBA4$1,\n    'rgb565': GL_RGB565$1,\n    'rgb5 a1': GL_RGB5_A1$1,\n    'depth': GL_DEPTH_COMPONENT16,\n    'stencil': GL_STENCIL_INDEX8,\n    'depth stencil': GL_DEPTH_STENCIL$1\n  }\n\n  if (extensions.ext_srgb) {\n    formatTypes['srgba'] = GL_SRGB8_ALPHA8_EXT\n  }\n\n  if (extensions.ext_color_buffer_half_float) {\n    formatTypes['rgba16f'] = GL_RGBA16F_EXT\n    formatTypes['rgb16f'] = GL_RGB16F_EXT\n  }\n\n  if (extensions.webgl_color_buffer_float) {\n    formatTypes['rgba32f'] = GL_RGBA32F_EXT\n  }\n\n  var formatTypesInvert = []\n  Object.keys(formatTypes).forEach(function (key) {\n    var val = formatTypes[key]\n    formatTypesInvert[val] = key\n  })\n\n  var renderbufferCount = 0\n  var renderbufferSet = {}\n\n  function REGLRenderbuffer (renderbuffer) {\n    this.id = renderbufferCount++\n    this.refCount = 1\n\n    this.renderbuffer = renderbuffer\n\n    this.format = GL_RGBA4$1\n    this.width = 0\n    this.height = 0\n\n    if (config.profile) {\n      this.stats = { size: 0 }\n    }\n  }\n\n  REGLRenderbuffer.prototype.decRef = function () {\n    if (--this.refCount <= 0) {\n      destroy(this)\n    }\n  }\n\n  function destroy (rb) {\n    var handle = rb.renderbuffer\n    check$1(handle, 'must not double destroy renderbuffer')\n    gl.bindRenderbuffer(GL_RENDERBUFFER, null)\n    gl.deleteRenderbuffer(handle)\n    rb.renderbuffer = null\n    rb.refCount = 0\n    delete renderbufferSet[rb.id]\n    stats.renderbufferCount--\n  }\n\n  function createRenderbuffer (a, b) {\n    var renderbuffer = new REGLRenderbuffer(gl.createRenderbuffer())\n    renderbufferSet[renderbuffer.id] = renderbuffer\n    stats.renderbufferCount++\n\n    function reglRenderbuffer (a, b) {\n      var w = 0\n      var h = 0\n      var format = GL_RGBA4$1\n\n      if (typeof a === 'object' && a) {\n        var options = a\n        if ('shape' in options) {\n          var shape = options.shape\n          check$1(Array.isArray(shape) && shape.length >= 2,\n            'invalid renderbuffer shape')\n          w = shape[0] | 0\n          h = shape[1] | 0\n        } else {\n          if ('radius' in options) {\n            w = h = options.radius | 0\n          }\n          if ('width' in options) {\n            w = options.width | 0\n          }\n          if ('height' in options) {\n            h = options.height | 0\n          }\n        }\n        if ('format' in options) {\n          check$1.parameter(options.format, formatTypes,\n            'invalid renderbuffer format')\n          format = formatTypes[options.format]\n        }\n      } else if (typeof a === 'number') {\n        w = a | 0\n        if (typeof b === 'number') {\n          h = b | 0\n        } else {\n          h = w\n        }\n      } else if (!a) {\n        w = h = 1\n      } else {\n        check$1.raise('invalid arguments to renderbuffer constructor')\n      }\n\n      // check shape\n      check$1(\n        w > 0 && h > 0 &&\n        w <= limits.maxRenderbufferSize && h <= limits.maxRenderbufferSize,\n        'invalid renderbuffer size')\n\n      if (w === renderbuffer.width &&\n          h === renderbuffer.height &&\n          format === renderbuffer.format) {\n        return\n      }\n\n      reglRenderbuffer.width = renderbuffer.width = w\n      reglRenderbuffer.height = renderbuffer.height = h\n      renderbuffer.format = format\n\n      gl.bindRenderbuffer(GL_RENDERBUFFER, renderbuffer.renderbuffer)\n      gl.renderbufferStorage(GL_RENDERBUFFER, format, w, h)\n\n      check$1(\n        gl.getError() === 0,\n        'invalid render buffer format')\n\n      if (config.profile) {\n        renderbuffer.stats.size = getRenderbufferSize(renderbuffer.format, renderbuffer.width, renderbuffer.height)\n      }\n      reglRenderbuffer.format = formatTypesInvert[renderbuffer.format]\n\n      return reglRenderbuffer\n    }\n\n    function resize (w_, h_) {\n      var w = w_ | 0\n      var h = (h_ | 0) || w\n\n      if (w === renderbuffer.width && h === renderbuffer.height) {\n        return reglRenderbuffer\n      }\n\n      // check shape\n      check$1(\n        w > 0 && h > 0 &&\n        w <= limits.maxRenderbufferSize && h <= limits.maxRenderbufferSize,\n        'invalid renderbuffer size')\n\n      reglRenderbuffer.width = renderbuffer.width = w\n      reglRenderbuffer.height = renderbuffer.height = h\n\n      gl.bindRenderbuffer(GL_RENDERBUFFER, renderbuffer.renderbuffer)\n      gl.renderbufferStorage(GL_RENDERBUFFER, renderbuffer.format, w, h)\n\n      check$1(\n        gl.getError() === 0,\n        'invalid render buffer format')\n\n      // also, recompute size.\n      if (config.profile) {\n        renderbuffer.stats.size = getRenderbufferSize(\n          renderbuffer.format, renderbuffer.width, renderbuffer.height)\n      }\n\n      return reglRenderbuffer\n    }\n\n    reglRenderbuffer(a, b)\n\n    reglRenderbuffer.resize = resize\n    reglRenderbuffer._reglType = 'renderbuffer'\n    reglRenderbuffer._renderbuffer = renderbuffer\n    if (config.profile) {\n      reglRenderbuffer.stats = renderbuffer.stats\n    }\n    reglRenderbuffer.destroy = function () {\n      renderbuffer.decRef()\n    }\n\n    return reglRenderbuffer\n  }\n\n  if (config.profile) {\n    stats.getTotalRenderbufferSize = function () {\n      var total = 0\n      Object.keys(renderbufferSet).forEach(function (key) {\n        total += renderbufferSet[key].stats.size\n      })\n      return total\n    }\n  }\n\n  function restoreRenderbuffers () {\n    values(renderbufferSet).forEach(function (rb) {\n      rb.renderbuffer = gl.createRenderbuffer()\n      gl.bindRenderbuffer(GL_RENDERBUFFER, rb.renderbuffer)\n      gl.renderbufferStorage(GL_RENDERBUFFER, rb.format, rb.width, rb.height)\n    })\n    gl.bindRenderbuffer(GL_RENDERBUFFER, null)\n  }\n\n  return {\n    create: createRenderbuffer,\n    clear: function () {\n      values(renderbufferSet).forEach(destroy)\n    },\n    restore: restoreRenderbuffers\n  }\n}\n\n// We store these constants so that the minifier can inline them\nvar GL_FRAMEBUFFER$1 = 0x8D40\nvar GL_RENDERBUFFER$1 = 0x8D41\n\nvar GL_TEXTURE_2D$2 = 0x0DE1\nvar GL_TEXTURE_CUBE_MAP_POSITIVE_X$2 = 0x8515\n\nvar GL_COLOR_ATTACHMENT0$1 = 0x8CE0\nvar GL_DEPTH_ATTACHMENT = 0x8D00\nvar GL_STENCIL_ATTACHMENT = 0x8D20\nvar GL_DEPTH_STENCIL_ATTACHMENT = 0x821A\n\nvar GL_FRAMEBUFFER_COMPLETE$1 = 0x8CD5\nvar GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT = 0x8CD6\nvar GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT = 0x8CD7\nvar GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS = 0x8CD9\nvar GL_FRAMEBUFFER_UNSUPPORTED = 0x8CDD\n\nvar GL_HALF_FLOAT_OES$2 = 0x8D61\nvar GL_UNSIGNED_BYTE$6 = 0x1401\nvar GL_FLOAT$5 = 0x1406\n\nvar GL_RGB$1 = 0x1907\nvar GL_RGBA$2 = 0x1908\n\nvar GL_DEPTH_COMPONENT$1 = 0x1902\n\nvar colorTextureFormatEnums = [\n  GL_RGB$1,\n  GL_RGBA$2\n]\n\n// for every texture format, store\n// the number of channels\nvar textureFormatChannels = []\ntextureFormatChannels[GL_RGBA$2] = 4\ntextureFormatChannels[GL_RGB$1] = 3\n\n// for every texture type, store\n// the size in bytes.\nvar textureTypeSizes = []\ntextureTypeSizes[GL_UNSIGNED_BYTE$6] = 1\ntextureTypeSizes[GL_FLOAT$5] = 4\ntextureTypeSizes[GL_HALF_FLOAT_OES$2] = 2\n\nvar GL_RGBA4$2 = 0x8056\nvar GL_RGB5_A1$2 = 0x8057\nvar GL_RGB565$2 = 0x8D62\nvar GL_DEPTH_COMPONENT16$1 = 0x81A5\nvar GL_STENCIL_INDEX8$1 = 0x8D48\nvar GL_DEPTH_STENCIL$2 = 0x84F9\n\nvar GL_SRGB8_ALPHA8_EXT$1 = 0x8C43\n\nvar GL_RGBA32F_EXT$1 = 0x8814\n\nvar GL_RGBA16F_EXT$1 = 0x881A\nvar GL_RGB16F_EXT$1 = 0x881B\n\nvar colorRenderbufferFormatEnums = [\n  GL_RGBA4$2,\n  GL_RGB5_A1$2,\n  GL_RGB565$2,\n  GL_SRGB8_ALPHA8_EXT$1,\n  GL_RGBA16F_EXT$1,\n  GL_RGB16F_EXT$1,\n  GL_RGBA32F_EXT$1\n]\n\nvar statusCode = {}\nstatusCode[GL_FRAMEBUFFER_COMPLETE$1] = 'complete'\nstatusCode[GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT] = 'incomplete attachment'\nstatusCode[GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS] = 'incomplete dimensions'\nstatusCode[GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT] = 'incomplete, missing attachment'\nstatusCode[GL_FRAMEBUFFER_UNSUPPORTED] = 'unsupported'\n\nfunction wrapFBOState (\n  gl,\n  extensions,\n  limits,\n  textureState,\n  renderbufferState,\n  stats) {\n  var framebufferState = {\n    cur: null,\n    next: null,\n    dirty: false,\n    setFBO: null\n  }\n\n  var colorTextureFormats = ['rgba']\n  var colorRenderbufferFormats = ['rgba4', 'rgb565', 'rgb5 a1']\n\n  if (extensions.ext_srgb) {\n    colorRenderbufferFormats.push('srgba')\n  }\n\n  if (extensions.ext_color_buffer_half_float) {\n    colorRenderbufferFormats.push('rgba16f', 'rgb16f')\n  }\n\n  if (extensions.webgl_color_buffer_float) {\n    colorRenderbufferFormats.push('rgba32f')\n  }\n\n  var colorTypes = ['uint8']\n  if (extensions.oes_texture_half_float) {\n    colorTypes.push('half float', 'float16')\n  }\n  if (extensions.oes_texture_float) {\n    colorTypes.push('float', 'float32')\n  }\n\n  function FramebufferAttachment (target, texture, renderbuffer) {\n    this.target = target\n    this.texture = texture\n    this.renderbuffer = renderbuffer\n\n    var w = 0\n    var h = 0\n    if (texture) {\n      w = texture.width\n      h = texture.height\n    } else if (renderbuffer) {\n      w = renderbuffer.width\n      h = renderbuffer.height\n    }\n    this.width = w\n    this.height = h\n  }\n\n  function decRef (attachment) {\n    if (attachment) {\n      if (attachment.texture) {\n        attachment.texture._texture.decRef()\n      }\n      if (attachment.renderbuffer) {\n        attachment.renderbuffer._renderbuffer.decRef()\n      }\n    }\n  }\n\n  function incRefAndCheckShape (attachment, width, height) {\n    if (!attachment) {\n      return\n    }\n    if (attachment.texture) {\n      var texture = attachment.texture._texture\n      var tw = Math.max(1, texture.width)\n      var th = Math.max(1, texture.height)\n      check$1(tw === width && th === height,\n        'inconsistent width/height for supplied texture')\n      texture.refCount += 1\n    } else {\n      var renderbuffer = attachment.renderbuffer._renderbuffer\n      check$1(\n        renderbuffer.width === width && renderbuffer.height === height,\n        'inconsistent width/height for renderbuffer')\n      renderbuffer.refCount += 1\n    }\n  }\n\n  function attach (location, attachment) {\n    if (attachment) {\n      if (attachment.texture) {\n        gl.framebufferTexture2D(\n          GL_FRAMEBUFFER$1,\n          location,\n          attachment.target,\n          attachment.texture._texture.texture,\n          0)\n      } else {\n        gl.framebufferRenderbuffer(\n          GL_FRAMEBUFFER$1,\n          location,\n          GL_RENDERBUFFER$1,\n          attachment.renderbuffer._renderbuffer.renderbuffer)\n      }\n    }\n  }\n\n  function parseAttachment (attachment) {\n    var target = GL_TEXTURE_2D$2\n    var texture = null\n    var renderbuffer = null\n\n    var data = attachment\n    if (typeof attachment === 'object') {\n      data = attachment.data\n      if ('target' in attachment) {\n        target = attachment.target | 0\n      }\n    }\n\n    check$1.type(data, 'function', 'invalid attachment data')\n\n    var type = data._reglType\n    if (type === 'texture2d') {\n      texture = data\n      check$1(target === GL_TEXTURE_2D$2)\n    } else if (type === 'textureCube') {\n      texture = data\n      check$1(\n        target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X$2 &&\n        target < GL_TEXTURE_CUBE_MAP_POSITIVE_X$2 + 6,\n        'invalid cube map target')\n    } else if (type === 'renderbuffer') {\n      renderbuffer = data\n      target = GL_RENDERBUFFER$1\n    } else {\n      check$1.raise('invalid regl object for attachment')\n    }\n\n    return new FramebufferAttachment(target, texture, renderbuffer)\n  }\n\n  function allocAttachment (\n    width,\n    height,\n    isTexture,\n    format,\n    type) {\n    if (isTexture) {\n      var texture = textureState.create2D({\n        width: width,\n        height: height,\n        format: format,\n        type: type\n      })\n      texture._texture.refCount = 0\n      return new FramebufferAttachment(GL_TEXTURE_2D$2, texture, null)\n    } else {\n      var rb = renderbufferState.create({\n        width: width,\n        height: height,\n        format: format\n      })\n      rb._renderbuffer.refCount = 0\n      return new FramebufferAttachment(GL_RENDERBUFFER$1, null, rb)\n    }\n  }\n\n  function unwrapAttachment (attachment) {\n    return attachment && (attachment.texture || attachment.renderbuffer)\n  }\n\n  function resizeAttachment (attachment, w, h) {\n    if (attachment) {\n      if (attachment.texture) {\n        attachment.texture.resize(w, h)\n      } else if (attachment.renderbuffer) {\n        attachment.renderbuffer.resize(w, h)\n      }\n      attachment.width = w\n      attachment.height = h\n    }\n  }\n\n  var framebufferCount = 0\n  var framebufferSet = {}\n\n  function REGLFramebuffer () {\n    this.id = framebufferCount++\n    framebufferSet[this.id] = this\n\n    this.framebuffer = gl.createFramebuffer()\n    this.width = 0\n    this.height = 0\n\n    this.colorAttachments = []\n    this.depthAttachment = null\n    this.stencilAttachment = null\n    this.depthStencilAttachment = null\n  }\n\n  function decFBORefs (framebuffer) {\n    framebuffer.colorAttachments.forEach(decRef)\n    decRef(framebuffer.depthAttachment)\n    decRef(framebuffer.stencilAttachment)\n    decRef(framebuffer.depthStencilAttachment)\n  }\n\n  function destroy (framebuffer) {\n    var handle = framebuffer.framebuffer\n    check$1(handle, 'must not double destroy framebuffer')\n    gl.deleteFramebuffer(handle)\n    framebuffer.framebuffer = null\n    stats.framebufferCount--\n    delete framebufferSet[framebuffer.id]\n  }\n\n  function updateFramebuffer (framebuffer) {\n    var i\n\n    gl.bindFramebuffer(GL_FRAMEBUFFER$1, framebuffer.framebuffer)\n    var colorAttachments = framebuffer.colorAttachments\n    for (i = 0; i < colorAttachments.length; ++i) {\n      attach(GL_COLOR_ATTACHMENT0$1 + i, colorAttachments[i])\n    }\n    for (i = colorAttachments.length; i < limits.maxColorAttachments; ++i) {\n      gl.framebufferTexture2D(\n        GL_FRAMEBUFFER$1,\n        GL_COLOR_ATTACHMENT0$1 + i,\n        GL_TEXTURE_2D$2,\n        null,\n        0)\n    }\n\n    gl.framebufferTexture2D(\n      GL_FRAMEBUFFER$1,\n      GL_DEPTH_STENCIL_ATTACHMENT,\n      GL_TEXTURE_2D$2,\n      null,\n      0)\n    gl.framebufferTexture2D(\n      GL_FRAMEBUFFER$1,\n      GL_DEPTH_ATTACHMENT,\n      GL_TEXTURE_2D$2,\n      null,\n      0)\n    gl.framebufferTexture2D(\n      GL_FRAMEBUFFER$1,\n      GL_STENCIL_ATTACHMENT,\n      GL_TEXTURE_2D$2,\n      null,\n      0)\n\n    attach(GL_DEPTH_ATTACHMENT, framebuffer.depthAttachment)\n    attach(GL_STENCIL_ATTACHMENT, framebuffer.stencilAttachment)\n    attach(GL_DEPTH_STENCIL_ATTACHMENT, framebuffer.depthStencilAttachment)\n\n    // Check status code\n    var status = gl.checkFramebufferStatus(GL_FRAMEBUFFER$1)\n    if (!gl.isContextLost() && status !== GL_FRAMEBUFFER_COMPLETE$1) {\n      check$1.raise('framebuffer configuration not supported, status = ' +\n        statusCode[status])\n    }\n\n    gl.bindFramebuffer(GL_FRAMEBUFFER$1, framebufferState.next ? framebufferState.next.framebuffer : null)\n    framebufferState.cur = framebufferState.next\n\n    // FIXME: Clear error code here.  This is a work around for a bug in\n    // headless-gl\n    gl.getError()\n  }\n\n  function createFBO (a0, a1) {\n    var framebuffer = new REGLFramebuffer()\n    stats.framebufferCount++\n\n    function reglFramebuffer (a, b) {\n      var i\n\n      check$1(framebufferState.next !== framebuffer,\n        'can not update framebuffer which is currently in use')\n\n      var width = 0\n      var height = 0\n\n      var needsDepth = true\n      var needsStencil = true\n\n      var colorBuffer = null\n      var colorTexture = true\n      var colorFormat = 'rgba'\n      var colorType = 'uint8'\n      var colorCount = 1\n\n      var depthBuffer = null\n      var stencilBuffer = null\n      var depthStencilBuffer = null\n      var depthStencilTexture = false\n\n      if (typeof a === 'number') {\n        width = a | 0\n        height = (b | 0) || width\n      } else if (!a) {\n        width = height = 1\n      } else {\n        check$1.type(a, 'object', 'invalid arguments for framebuffer')\n        var options = a\n\n        if ('shape' in options) {\n          var shape = options.shape\n          check$1(Array.isArray(shape) && shape.length >= 2,\n            'invalid shape for framebuffer')\n          width = shape[0]\n          height = shape[1]\n        } else {\n          if ('radius' in options) {\n            width = height = options.radius\n          }\n          if ('width' in options) {\n            width = options.width\n          }\n          if ('height' in options) {\n            height = options.height\n          }\n        }\n\n        if ('color' in options ||\n            'colors' in options) {\n          colorBuffer =\n            options.color ||\n            options.colors\n          if (Array.isArray(colorBuffer)) {\n            check$1(\n              colorBuffer.length === 1 || extensions.webgl_draw_buffers,\n              'multiple render targets not supported')\n          }\n        }\n\n        if (!colorBuffer) {\n          if ('colorCount' in options) {\n            colorCount = options.colorCount | 0\n            check$1(colorCount > 0, 'invalid color buffer count')\n          }\n\n          if ('colorTexture' in options) {\n            colorTexture = !!options.colorTexture\n            colorFormat = 'rgba4'\n          }\n\n          if ('colorType' in options) {\n            colorType = options.colorType\n            if (!colorTexture) {\n              if (colorType === 'half float' || colorType === 'float16') {\n                check$1(extensions.ext_color_buffer_half_float,\n                  'you must enable EXT_color_buffer_half_float to use 16-bit render buffers')\n                colorFormat = 'rgba16f'\n              } else if (colorType === 'float' || colorType === 'float32') {\n                check$1(extensions.webgl_color_buffer_float,\n                  'you must enable WEBGL_color_buffer_float in order to use 32-bit floating point renderbuffers')\n                colorFormat = 'rgba32f'\n              }\n            } else {\n              check$1(extensions.oes_texture_float ||\n                !(colorType === 'float' || colorType === 'float32'),\n              'you must enable OES_texture_float in order to use floating point framebuffer objects')\n              check$1(extensions.oes_texture_half_float ||\n                !(colorType === 'half float' || colorType === 'float16'),\n              'you must enable OES_texture_half_float in order to use 16-bit floating point framebuffer objects')\n            }\n            check$1.oneOf(colorType, colorTypes, 'invalid color type')\n          }\n\n          if ('colorFormat' in options) {\n            colorFormat = options.colorFormat\n            if (colorTextureFormats.indexOf(colorFormat) >= 0) {\n              colorTexture = true\n            } else if (colorRenderbufferFormats.indexOf(colorFormat) >= 0) {\n              colorTexture = false\n            } else {\n              if (colorTexture) {\n                check$1.oneOf(\n                  options.colorFormat, colorTextureFormats,\n                  'invalid color format for texture')\n              } else {\n                check$1.oneOf(\n                  options.colorFormat, colorRenderbufferFormats,\n                  'invalid color format for renderbuffer')\n              }\n            }\n          }\n        }\n\n        if ('depthTexture' in options || 'depthStencilTexture' in options) {\n          depthStencilTexture = !!(options.depthTexture ||\n            options.depthStencilTexture)\n          check$1(!depthStencilTexture || extensions.webgl_depth_texture,\n            'webgl_depth_texture extension not supported')\n        }\n\n        if ('depth' in options) {\n          if (typeof options.depth === 'boolean') {\n            needsDepth = options.depth\n          } else {\n            depthBuffer = options.depth\n            needsStencil = false\n          }\n        }\n\n        if ('stencil' in options) {\n          if (typeof options.stencil === 'boolean') {\n            needsStencil = options.stencil\n          } else {\n            stencilBuffer = options.stencil\n            needsDepth = false\n          }\n        }\n\n        if ('depthStencil' in options) {\n          if (typeof options.depthStencil === 'boolean') {\n            needsDepth = needsStencil = options.depthStencil\n          } else {\n            depthStencilBuffer = options.depthStencil\n            needsDepth = false\n            needsStencil = false\n          }\n        }\n      }\n\n      // parse attachments\n      var colorAttachments = null\n      var depthAttachment = null\n      var stencilAttachment = null\n      var depthStencilAttachment = null\n\n      // Set up color attachments\n      if (Array.isArray(colorBuffer)) {\n        colorAttachments = colorBuffer.map(parseAttachment)\n      } else if (colorBuffer) {\n        colorAttachments = [parseAttachment(colorBuffer)]\n      } else {\n        colorAttachments = new Array(colorCount)\n        for (i = 0; i < colorCount; ++i) {\n          colorAttachments[i] = allocAttachment(\n            width,\n            height,\n            colorTexture,\n            colorFormat,\n            colorType)\n        }\n      }\n\n      check$1(extensions.webgl_draw_buffers || colorAttachments.length <= 1,\n        'you must enable the WEBGL_draw_buffers extension in order to use multiple color buffers.')\n      check$1(colorAttachments.length <= limits.maxColorAttachments,\n        'too many color attachments, not supported')\n\n      width = width || colorAttachments[0].width\n      height = height || colorAttachments[0].height\n\n      if (depthBuffer) {\n        depthAttachment = parseAttachment(depthBuffer)\n      } else if (needsDepth && !needsStencil) {\n        depthAttachment = allocAttachment(\n          width,\n          height,\n          depthStencilTexture,\n          'depth',\n          'uint32')\n      }\n\n      if (stencilBuffer) {\n        stencilAttachment = parseAttachment(stencilBuffer)\n      } else if (needsStencil && !needsDepth) {\n        stencilAttachment = allocAttachment(\n          width,\n          height,\n          false,\n          'stencil',\n          'uint8')\n      }\n\n      if (depthStencilBuffer) {\n        depthStencilAttachment = parseAttachment(depthStencilBuffer)\n      } else if (!depthBuffer && !stencilBuffer && needsStencil && needsDepth) {\n        depthStencilAttachment = allocAttachment(\n          width,\n          height,\n          depthStencilTexture,\n          'depth stencil',\n          'depth stencil')\n      }\n\n      check$1(\n        (!!depthBuffer) + (!!stencilBuffer) + (!!depthStencilBuffer) <= 1,\n        'invalid framebuffer configuration, can specify exactly one depth/stencil attachment')\n\n      var commonColorAttachmentSize = null\n\n      for (i = 0; i < colorAttachments.length; ++i) {\n        incRefAndCheckShape(colorAttachments[i], width, height)\n        check$1(!colorAttachments[i] ||\n          (colorAttachments[i].texture &&\n            colorTextureFormatEnums.indexOf(colorAttachments[i].texture._texture.format) >= 0) ||\n          (colorAttachments[i].renderbuffer &&\n            colorRenderbufferFormatEnums.indexOf(colorAttachments[i].renderbuffer._renderbuffer.format) >= 0),\n        'framebuffer color attachment ' + i + ' is invalid')\n\n        if (colorAttachments[i] && colorAttachments[i].texture) {\n          var colorAttachmentSize =\n              textureFormatChannels[colorAttachments[i].texture._texture.format] *\n              textureTypeSizes[colorAttachments[i].texture._texture.type]\n\n          if (commonColorAttachmentSize === null) {\n            commonColorAttachmentSize = colorAttachmentSize\n          } else {\n            // We need to make sure that all color attachments have the same number of bitplanes\n            // (that is, the same numer of bits per pixel)\n            // This is required by the GLES2.0 standard. See the beginning of Chapter 4 in that document.\n            check$1(commonColorAttachmentSize === colorAttachmentSize,\n              'all color attachments much have the same number of bits per pixel.')\n          }\n        }\n      }\n      incRefAndCheckShape(depthAttachment, width, height)\n      check$1(!depthAttachment ||\n        (depthAttachment.texture &&\n          depthAttachment.texture._texture.format === GL_DEPTH_COMPONENT$1) ||\n        (depthAttachment.renderbuffer &&\n          depthAttachment.renderbuffer._renderbuffer.format === GL_DEPTH_COMPONENT16$1),\n      'invalid depth attachment for framebuffer object')\n      incRefAndCheckShape(stencilAttachment, width, height)\n      check$1(!stencilAttachment ||\n        (stencilAttachment.renderbuffer &&\n          stencilAttachment.renderbuffer._renderbuffer.format === GL_STENCIL_INDEX8$1),\n      'invalid stencil attachment for framebuffer object')\n      incRefAndCheckShape(depthStencilAttachment, width, height)\n      check$1(!depthStencilAttachment ||\n        (depthStencilAttachment.texture &&\n          depthStencilAttachment.texture._texture.format === GL_DEPTH_STENCIL$2) ||\n        (depthStencilAttachment.renderbuffer &&\n          depthStencilAttachment.renderbuffer._renderbuffer.format === GL_DEPTH_STENCIL$2),\n      'invalid depth-stencil attachment for framebuffer object')\n\n      // decrement references\n      decFBORefs(framebuffer)\n\n      framebuffer.width = width\n      framebuffer.height = height\n\n      framebuffer.colorAttachments = colorAttachments\n      framebuffer.depthAttachment = depthAttachment\n      framebuffer.stencilAttachment = stencilAttachment\n      framebuffer.depthStencilAttachment = depthStencilAttachment\n\n      reglFramebuffer.color = colorAttachments.map(unwrapAttachment)\n      reglFramebuffer.depth = unwrapAttachment(depthAttachment)\n      reglFramebuffer.stencil = unwrapAttachment(stencilAttachment)\n      reglFramebuffer.depthStencil = unwrapAttachment(depthStencilAttachment)\n\n      reglFramebuffer.width = framebuffer.width\n      reglFramebuffer.height = framebuffer.height\n\n      updateFramebuffer(framebuffer)\n\n      return reglFramebuffer\n    }\n\n    function resize (w_, h_) {\n      check$1(framebufferState.next !== framebuffer,\n        'can not resize a framebuffer which is currently in use')\n\n      var w = Math.max(w_ | 0, 1)\n      var h = Math.max((h_ | 0) || w, 1)\n      if (w === framebuffer.width && h === framebuffer.height) {\n        return reglFramebuffer\n      }\n\n      // resize all buffers\n      var colorAttachments = framebuffer.colorAttachments\n      for (var i = 0; i < colorAttachments.length; ++i) {\n        resizeAttachment(colorAttachments[i], w, h)\n      }\n      resizeAttachment(framebuffer.depthAttachment, w, h)\n      resizeAttachment(framebuffer.stencilAttachment, w, h)\n      resizeAttachment(framebuffer.depthStencilAttachment, w, h)\n\n      framebuffer.width = reglFramebuffer.width = w\n      framebuffer.height = reglFramebuffer.height = h\n\n      updateFramebuffer(framebuffer)\n\n      return reglFramebuffer\n    }\n\n    reglFramebuffer(a0, a1)\n\n    return extend(reglFramebuffer, {\n      resize: resize,\n      _reglType: 'framebuffer',\n      _framebuffer: framebuffer,\n      destroy: function () {\n        destroy(framebuffer)\n        decFBORefs(framebuffer)\n      },\n      use: function (block) {\n        framebufferState.setFBO({\n          framebuffer: reglFramebuffer\n        }, block)\n      }\n    })\n  }\n\n  function createCubeFBO (options) {\n    var faces = Array(6)\n\n    function reglFramebufferCube (a) {\n      var i\n\n      check$1(faces.indexOf(framebufferState.next) < 0,\n        'can not update framebuffer which is currently in use')\n\n      var params = {\n        color: null\n      }\n\n      var radius = 0\n\n      var colorBuffer = null\n      var colorFormat = 'rgba'\n      var colorType = 'uint8'\n      var colorCount = 1\n\n      if (typeof a === 'number') {\n        radius = a | 0\n      } else if (!a) {\n        radius = 1\n      } else {\n        check$1.type(a, 'object', 'invalid arguments for framebuffer')\n        var options = a\n\n        if ('shape' in options) {\n          var shape = options.shape\n          check$1(\n            Array.isArray(shape) && shape.length >= 2,\n            'invalid shape for framebuffer')\n          check$1(\n            shape[0] === shape[1],\n            'cube framebuffer must be square')\n          radius = shape[0]\n        } else {\n          if ('radius' in options) {\n            radius = options.radius | 0\n          }\n          if ('width' in options) {\n            radius = options.width | 0\n            if ('height' in options) {\n              check$1(options.height === radius, 'must be square')\n            }\n          } else if ('height' in options) {\n            radius = options.height | 0\n          }\n        }\n\n        if ('color' in options ||\n            'colors' in options) {\n          colorBuffer =\n            options.color ||\n            options.colors\n          if (Array.isArray(colorBuffer)) {\n            check$1(\n              colorBuffer.length === 1 || extensions.webgl_draw_buffers,\n              'multiple render targets not supported')\n          }\n        }\n\n        if (!colorBuffer) {\n          if ('colorCount' in options) {\n            colorCount = options.colorCount | 0\n            check$1(colorCount > 0, 'invalid color buffer count')\n          }\n\n          if ('colorType' in options) {\n            check$1.oneOf(\n              options.colorType, colorTypes,\n              'invalid color type')\n            colorType = options.colorType\n          }\n\n          if ('colorFormat' in options) {\n            colorFormat = options.colorFormat\n            check$1.oneOf(\n              options.colorFormat, colorTextureFormats,\n              'invalid color format for texture')\n          }\n        }\n\n        if ('depth' in options) {\n          params.depth = options.depth\n        }\n\n        if ('stencil' in options) {\n          params.stencil = options.stencil\n        }\n\n        if ('depthStencil' in options) {\n          params.depthStencil = options.depthStencil\n        }\n      }\n\n      var colorCubes\n      if (colorBuffer) {\n        if (Array.isArray(colorBuffer)) {\n          colorCubes = []\n          for (i = 0; i < colorBuffer.length; ++i) {\n            colorCubes[i] = colorBuffer[i]\n          }\n        } else {\n          colorCubes = [ colorBuffer ]\n        }\n      } else {\n        colorCubes = Array(colorCount)\n        var cubeMapParams = {\n          radius: radius,\n          format: colorFormat,\n          type: colorType\n        }\n        for (i = 0; i < colorCount; ++i) {\n          colorCubes[i] = textureState.createCube(cubeMapParams)\n        }\n      }\n\n      // Check color cubes\n      params.color = Array(colorCubes.length)\n      for (i = 0; i < colorCubes.length; ++i) {\n        var cube = colorCubes[i]\n        check$1(\n          typeof cube === 'function' && cube._reglType === 'textureCube',\n          'invalid cube map')\n        radius = radius || cube.width\n        check$1(\n          cube.width === radius && cube.height === radius,\n          'invalid cube map shape')\n        params.color[i] = {\n          target: GL_TEXTURE_CUBE_MAP_POSITIVE_X$2,\n          data: colorCubes[i]\n        }\n      }\n\n      for (i = 0; i < 6; ++i) {\n        for (var j = 0; j < colorCubes.length; ++j) {\n          params.color[j].target = GL_TEXTURE_CUBE_MAP_POSITIVE_X$2 + i\n        }\n        // reuse depth-stencil attachments across all cube maps\n        if (i > 0) {\n          params.depth = faces[0].depth\n          params.stencil = faces[0].stencil\n          params.depthStencil = faces[0].depthStencil\n        }\n        if (faces[i]) {\n          (faces[i])(params)\n        } else {\n          faces[i] = createFBO(params)\n        }\n      }\n\n      return extend(reglFramebufferCube, {\n        width: radius,\n        height: radius,\n        color: colorCubes\n      })\n    }\n\n    function resize (radius_) {\n      var i\n      var radius = radius_ | 0\n      check$1(radius > 0 && radius <= limits.maxCubeMapSize,\n        'invalid radius for cube fbo')\n\n      if (radius === reglFramebufferCube.width) {\n        return reglFramebufferCube\n      }\n\n      var colors = reglFramebufferCube.color\n      for (i = 0; i < colors.length; ++i) {\n        colors[i].resize(radius)\n      }\n\n      for (i = 0; i < 6; ++i) {\n        faces[i].resize(radius)\n      }\n\n      reglFramebufferCube.width = reglFramebufferCube.height = radius\n\n      return reglFramebufferCube\n    }\n\n    reglFramebufferCube(options)\n\n    return extend(reglFramebufferCube, {\n      faces: faces,\n      resize: resize,\n      _reglType: 'framebufferCube',\n      destroy: function () {\n        faces.forEach(function (f) {\n          f.destroy()\n        })\n      }\n    })\n  }\n\n  function restoreFramebuffers () {\n    framebufferState.cur = null\n    framebufferState.next = null\n    framebufferState.dirty = true\n    values(framebufferSet).forEach(function (fb) {\n      fb.framebuffer = gl.createFramebuffer()\n      updateFramebuffer(fb)\n    })\n  }\n\n  return extend(framebufferState, {\n    getFramebuffer: function (object) {\n      if (typeof object === 'function' && object._reglType === 'framebuffer') {\n        var fbo = object._framebuffer\n        if (fbo instanceof REGLFramebuffer) {\n          return fbo\n        }\n      }\n      return null\n    },\n    create: createFBO,\n    createCube: createCubeFBO,\n    clear: function () {\n      values(framebufferSet).forEach(destroy)\n    },\n    restore: restoreFramebuffers\n  })\n}\n\nvar GL_FLOAT$6 = 5126\nvar GL_ARRAY_BUFFER$1 = 34962\n\nfunction AttributeRecord () {\n  this.state = 0\n\n  this.x = 0.0\n  this.y = 0.0\n  this.z = 0.0\n  this.w = 0.0\n\n  this.buffer = null\n  this.size = 0\n  this.normalized = false\n  this.type = GL_FLOAT$6\n  this.offset = 0\n  this.stride = 0\n  this.divisor = 0\n}\n\nfunction wrapAttributeState (\n  gl,\n  extensions,\n  limits,\n  stats,\n  bufferState) {\n  var NUM_ATTRIBUTES = limits.maxAttributes\n  var attributeBindings = new Array(NUM_ATTRIBUTES)\n  for (var i = 0; i < NUM_ATTRIBUTES; ++i) {\n    attributeBindings[i] = new AttributeRecord()\n  }\n  var vaoCount = 0\n  var vaoSet = {}\n\n  var state = {\n    Record: AttributeRecord,\n    scope: {},\n    state: attributeBindings,\n    currentVAO: null,\n    targetVAO: null,\n    restore: extVAO() ? restoreVAO : function () {},\n    createVAO: createVAO,\n    getVAO: getVAO,\n    destroyBuffer: destroyBuffer,\n    setVAO: extVAO() ? setVAOEXT : setVAOEmulated,\n    clear: extVAO() ? destroyVAOEXT : function () {}\n  }\n\n  function destroyBuffer (buffer) {\n    for (var i = 0; i < attributeBindings.length; ++i) {\n      var record = attributeBindings[i]\n      if (record.buffer === buffer) {\n        gl.disableVertexAttribArray(i)\n        record.buffer = null\n      }\n    }\n  }\n\n  function extVAO () {\n    return extensions.oes_vertex_array_object\n  }\n\n  function extInstanced () {\n    return extensions.angle_instanced_arrays\n  }\n\n  function getVAO (vao) {\n    if (typeof vao === 'function' && vao._vao) {\n      return vao._vao\n    }\n    return null\n  }\n\n  function setVAOEXT (vao) {\n    if (vao === state.currentVAO) {\n      return\n    }\n    var ext = extVAO()\n    if (vao) {\n      ext.bindVertexArrayOES(vao.vao)\n    } else {\n      ext.bindVertexArrayOES(null)\n    }\n    state.currentVAO = vao\n  }\n\n  function setVAOEmulated (vao) {\n    if (vao === state.currentVAO) {\n      return\n    }\n    if (vao) {\n      vao.bindAttrs()\n    } else {\n      var exti = extInstanced()\n      for (var i = 0; i < attributeBindings.length; ++i) {\n        var binding = attributeBindings[i]\n        if (binding.buffer) {\n          gl.enableVertexAttribArray(i)\n          gl.vertexAttribPointer(i, binding.size, binding.type, binding.normalized, binding.stride, binding.offfset)\n          if (exti && binding.divisor) {\n            exti.vertexAttribDivisorANGLE(i, binding.divisor)\n          }\n        } else {\n          gl.disableVertexAttribArray(i)\n          gl.vertexAttrib4f(i, binding.x, binding.y, binding.z, binding.w)\n        }\n      }\n    }\n    state.currentVAO = vao\n  }\n\n  function destroyVAOEXT () {\n    values(vaoSet).forEach(function (vao) {\n      vao.destroy()\n    })\n  }\n\n  function REGLVAO () {\n    this.id = ++vaoCount\n    this.attributes = []\n    var extension = extVAO()\n    if (extension) {\n      this.vao = extension.createVertexArrayOES()\n    } else {\n      this.vao = null\n    }\n    vaoSet[this.id] = this\n    this.buffers = []\n  }\n\n  REGLVAO.prototype.bindAttrs = function () {\n    var exti = extInstanced()\n    var attributes = this.attributes\n    for (var i = 0; i < attributes.length; ++i) {\n      var attr = attributes[i]\n      if (attr.buffer) {\n        gl.enableVertexAttribArray(i)\n        gl.bindBuffer(GL_ARRAY_BUFFER$1, attr.buffer.buffer)\n        gl.vertexAttribPointer(i, attr.size, attr.type, attr.normalized, attr.stride, attr.offset)\n        if (exti && attr.divisor) {\n          exti.vertexAttribDivisorANGLE(i, attr.divisor)\n        }\n      } else {\n        gl.disableVertexAttribArray(i)\n        gl.vertexAttrib4f(i, attr.x, attr.y, attr.z, attr.w)\n      }\n    }\n    for (var j = attributes.length; j < NUM_ATTRIBUTES; ++j) {\n      gl.disableVertexAttribArray(j)\n    }\n  }\n\n  REGLVAO.prototype.refresh = function () {\n    var ext = extVAO()\n    if (ext) {\n      ext.bindVertexArrayOES(this.vao)\n      this.bindAttrs()\n      state.currentVAO = this\n    }\n  }\n\n  REGLVAO.prototype.destroy = function () {\n    if (this.vao) {\n      var extension = extVAO()\n      if (this === state.currentVAO) {\n        state.currentVAO = null\n        extension.bindVertexArrayOES(null)\n      }\n      extension.deleteVertexArrayOES(this.vao)\n      this.vao = null\n    }\n    if (vaoSet[this.id]) {\n      delete vaoSet[this.id]\n      stats.vaoCount -= 1\n    }\n  }\n\n  function restoreVAO () {\n    var ext = extVAO()\n    if (ext) {\n      values(vaoSet).forEach(function (vao) {\n        vao.refresh()\n      })\n    }\n  }\n\n  function createVAO (_attr) {\n    var vao = new REGLVAO()\n    stats.vaoCount += 1\n\n    function updateVAO (attributes) {\n      check$1(Array.isArray(attributes), 'arguments to vertex array constructor must be an array')\n      check$1(attributes.length < NUM_ATTRIBUTES, 'too many attributes')\n      check$1(attributes.length > 0, 'must specify at least one attribute')\n\n      var bufUpdated = {}\n      var nattributes = vao.attributes\n      nattributes.length = attributes.length\n      for (var i = 0; i < attributes.length; ++i) {\n        var spec = attributes[i]\n        var rec = nattributes[i] = new AttributeRecord()\n        var data = spec.data || spec\n        if (Array.isArray(data) || isTypedArray(data) || isNDArrayLike(data)) {\n          var buf\n          if (vao.buffers[i]) {\n            buf = vao.buffers[i]\n            if (isTypedArray(data) && buf._buffer.byteLength >= data.byteLength) {\n              buf.subdata(data)\n            } else {\n              buf.destroy()\n              vao.buffers[i] = null\n            }\n          }\n          if (!vao.buffers[i]) {\n            buf = vao.buffers[i] = bufferState.create(spec, GL_ARRAY_BUFFER$1, false, true)\n          }\n          rec.buffer = bufferState.getBuffer(buf)\n          rec.size = rec.buffer.dimension | 0\n          rec.normalized = false\n          rec.type = rec.buffer.dtype\n          rec.offset = 0\n          rec.stride = 0\n          rec.divisor = 0\n          rec.state = 1\n          bufUpdated[i] = 1\n        } else if (bufferState.getBuffer(spec)) {\n          rec.buffer = bufferState.getBuffer(spec)\n          rec.size = rec.buffer.dimension | 0\n          rec.normalized = false\n          rec.type = rec.buffer.dtype\n          rec.offset = 0\n          rec.stride = 0\n          rec.divisor = 0\n          rec.state = 1\n        } else if (bufferState.getBuffer(spec.buffer)) {\n          rec.buffer = bufferState.getBuffer(spec.buffer)\n          rec.size = ((+spec.size) || rec.buffer.dimension) | 0\n          rec.normalized = !!spec.normalized || false\n          if ('type' in spec) {\n            check$1.parameter(spec.type, glTypes, 'invalid buffer type')\n            rec.type = glTypes[spec.type]\n          } else {\n            rec.type = rec.buffer.dtype\n          }\n          rec.offset = (spec.offset || 0) | 0\n          rec.stride = (spec.stride || 0) | 0\n          rec.divisor = (spec.divisor || 0) | 0\n          rec.state = 1\n\n          check$1(rec.size >= 1 && rec.size <= 4, 'size must be between 1 and 4')\n          check$1(rec.offset >= 0, 'invalid offset')\n          check$1(rec.stride >= 0 && rec.stride <= 255, 'stride must be between 0 and 255')\n          check$1(rec.divisor >= 0, 'divisor must be positive')\n          check$1(!rec.divisor || !!extensions.angle_instanced_arrays, 'ANGLE_instanced_arrays must be enabled to use divisor')\n        } else if ('x' in spec) {\n          check$1(i > 0, 'first attribute must not be a constant')\n          rec.x = +spec.x || 0\n          rec.y = +spec.y || 0\n          rec.z = +spec.z || 0\n          rec.w = +spec.w || 0\n          rec.state = 2\n        } else {\n          check$1(false, 'invalid attribute spec for location ' + i)\n        }\n      }\n\n      // retire unused buffers\n      for (var j = 0; j < vao.buffers.length; ++j) {\n        if (!bufUpdated[j] && vao.buffers[j]) {\n          vao.buffers[j].destroy()\n          vao.buffers[j] = null\n        }\n      }\n\n      vao.refresh()\n      return updateVAO\n    }\n\n    updateVAO.destroy = function () {\n      for (var j = 0; j < vao.buffers.length; ++j) {\n        if (vao.buffers[j]) {\n          vao.buffers[j].destroy()\n        }\n      }\n      vao.buffers.length = 0\n      vao.destroy()\n    }\n\n    updateVAO._vao = vao\n    updateVAO._reglType = 'vao'\n\n    return updateVAO(_attr)\n  }\n\n  return state\n}\n\nvar GL_FRAGMENT_SHADER = 35632\nvar GL_VERTEX_SHADER = 35633\n\nvar GL_ACTIVE_UNIFORMS = 0x8B86\nvar GL_ACTIVE_ATTRIBUTES = 0x8B89\n\nfunction wrapShaderState (gl, stringStore, stats, config) {\n  // ===================================================\n  // glsl compilation and linking\n  // ===================================================\n  var fragShaders = {}\n  var vertShaders = {}\n\n  function ActiveInfo (name, id, location, info) {\n    this.name = name\n    this.id = id\n    this.location = location\n    this.info = info\n  }\n\n  function insertActiveInfo (list, info) {\n    for (var i = 0; i < list.length; ++i) {\n      if (list[i].id === info.id) {\n        list[i].location = info.location\n        return\n      }\n    }\n    list.push(info)\n  }\n\n  function getShader (type, id, command) {\n    var cache = type === GL_FRAGMENT_SHADER ? fragShaders : vertShaders\n    var shader = cache[id]\n\n    if (!shader) {\n      var source = stringStore.str(id)\n      shader = gl.createShader(type)\n      gl.shaderSource(shader, source)\n      gl.compileShader(shader)\n      check$1.shaderError(gl, shader, source, type, command)\n      cache[id] = shader\n    }\n\n    return shader\n  }\n\n  // ===================================================\n  // program linking\n  // ===================================================\n  var programCache = {}\n  var programList = []\n\n  var PROGRAM_COUNTER = 0\n\n  function REGLProgram (fragId, vertId) {\n    this.id = PROGRAM_COUNTER++\n    this.fragId = fragId\n    this.vertId = vertId\n    this.program = null\n    this.uniforms = []\n    this.attributes = []\n    this.refCount = 1\n\n    if (config.profile) {\n      this.stats = {\n        uniformsCount: 0,\n        attributesCount: 0\n      }\n    }\n  }\n\n  function linkProgram (desc, command, attributeLocations) {\n    var i, info\n\n    // -------------------------------\n    // compile & link\n    // -------------------------------\n    var fragShader = getShader(GL_FRAGMENT_SHADER, desc.fragId)\n    var vertShader = getShader(GL_VERTEX_SHADER, desc.vertId)\n\n    var program = desc.program = gl.createProgram()\n    gl.attachShader(program, fragShader)\n    gl.attachShader(program, vertShader)\n    if (attributeLocations) {\n      for (i = 0; i < attributeLocations.length; ++i) {\n        var binding = attributeLocations[i]\n        gl.bindAttribLocation(program, binding[0], binding[1])\n      }\n    }\n\n    gl.linkProgram(program)\n    check$1.linkError(\n      gl,\n      program,\n      stringStore.str(desc.fragId),\n      stringStore.str(desc.vertId),\n      command)\n\n    // -------------------------------\n    // grab uniforms\n    // -------------------------------\n    var numUniforms = gl.getProgramParameter(program, GL_ACTIVE_UNIFORMS)\n    if (config.profile) {\n      desc.stats.uniformsCount = numUniforms\n    }\n    var uniforms = desc.uniforms\n    for (i = 0; i < numUniforms; ++i) {\n      info = gl.getActiveUniform(program, i)\n      if (info) {\n        if (info.size > 1) {\n          for (var j = 0; j < info.size; ++j) {\n            var name = info.name.replace('[0]', '[' + j + ']')\n            insertActiveInfo(uniforms, new ActiveInfo(\n              name,\n              stringStore.id(name),\n              gl.getUniformLocation(program, name),\n              info))\n          }\n        } else {\n          insertActiveInfo(uniforms, new ActiveInfo(\n            info.name,\n            stringStore.id(info.name),\n            gl.getUniformLocation(program, info.name),\n            info))\n        }\n      }\n    }\n\n    // -------------------------------\n    // grab attributes\n    // -------------------------------\n    var numAttributes = gl.getProgramParameter(program, GL_ACTIVE_ATTRIBUTES)\n    if (config.profile) {\n      desc.stats.attributesCount = numAttributes\n    }\n\n    var attributes = desc.attributes\n    for (i = 0; i < numAttributes; ++i) {\n      info = gl.getActiveAttrib(program, i)\n      if (info) {\n        insertActiveInfo(attributes, new ActiveInfo(\n          info.name,\n          stringStore.id(info.name),\n          gl.getAttribLocation(program, info.name),\n          info))\n      }\n    }\n  }\n\n  if (config.profile) {\n    stats.getMaxUniformsCount = function () {\n      var m = 0\n      programList.forEach(function (desc) {\n        if (desc.stats.uniformsCount > m) {\n          m = desc.stats.uniformsCount\n        }\n      })\n      return m\n    }\n\n    stats.getMaxAttributesCount = function () {\n      var m = 0\n      programList.forEach(function (desc) {\n        if (desc.stats.attributesCount > m) {\n          m = desc.stats.attributesCount\n        }\n      })\n      return m\n    }\n  }\n\n  function restoreShaders () {\n    fragShaders = {}\n    vertShaders = {}\n    for (var i = 0; i < programList.length; ++i) {\n      linkProgram(programList[i], null, programList[i].attributes.map(function (info) {\n        return [info.location, info.name]\n      }))\n    }\n  }\n\n  return {\n    clear: function () {\n      var deleteShader = gl.deleteShader.bind(gl)\n      values(fragShaders).forEach(deleteShader)\n      fragShaders = {}\n      values(vertShaders).forEach(deleteShader)\n      vertShaders = {}\n\n      programList.forEach(function (desc) {\n        gl.deleteProgram(desc.program)\n      })\n      programList.length = 0\n      programCache = {}\n\n      stats.shaderCount = 0\n    },\n\n    program: function (vertId, fragId, command, attribLocations) {\n      check$1.command(vertId >= 0, 'missing vertex shader', command)\n      check$1.command(fragId >= 0, 'missing fragment shader', command)\n\n      var cache = programCache[fragId]\n      if (!cache) {\n        cache = programCache[fragId] = {}\n      }\n      var prevProgram = cache[vertId]\n      if (prevProgram) {\n        prevProgram.refCount++\n        if (!attribLocations) {\n          return prevProgram\n        }\n      }\n      var program = new REGLProgram(fragId, vertId)\n      stats.shaderCount++\n      linkProgram(program, command, attribLocations)\n      if (!prevProgram) {\n        cache[vertId] = program\n      }\n      programList.push(program)\n      return extend(program, {\n        destroy: function () {\n          program.refCount--\n          if (program.refCount <= 0) {\n            gl.deleteProgram(program.program)\n            var idx = programList.indexOf(program)\n            programList.splice(idx, 1)\n            stats.shaderCount--\n          }\n          // no program is linked to this vert anymore\n          if (cache[program.vertId].refCount <= 0) {\n            gl.deleteShader(vertShaders[program.vertId])\n            delete vertShaders[program.vertId]\n            delete programCache[program.fragId][program.vertId]\n          }\n          // no program is linked to this frag anymore\n          if (!Object.keys(programCache[program.fragId]).length) {\n            gl.deleteShader(fragShaders[program.fragId])\n            delete fragShaders[program.fragId]\n            delete programCache[program.fragId]\n          }\n        }\n      })\n    },\n\n    restore: restoreShaders,\n\n    shader: getShader,\n\n    frag: -1,\n    vert: -1\n  }\n}\n\nvar GL_RGBA$3 = 6408\nvar GL_UNSIGNED_BYTE$7 = 5121\nvar GL_PACK_ALIGNMENT = 0x0D05\nvar GL_FLOAT$7 = 0x1406 // 5126\n\nfunction wrapReadPixels (\n  gl,\n  framebufferState,\n  reglPoll,\n  context,\n  glAttributes,\n  extensions,\n  limits) {\n  function readPixelsImpl (input) {\n    var type\n    if (framebufferState.next === null) {\n      check$1(\n        glAttributes.preserveDrawingBuffer,\n        'you must create a webgl context with \"preserveDrawingBuffer\":true in order to read pixels from the drawing buffer')\n      type = GL_UNSIGNED_BYTE$7\n    } else {\n      check$1(\n        framebufferState.next.colorAttachments[0].texture !== null,\n        'You cannot read from a renderbuffer')\n      type = framebufferState.next.colorAttachments[0].texture._texture.type\n\n      if (extensions.oes_texture_float) {\n        check$1(\n          type === GL_UNSIGNED_BYTE$7 || type === GL_FLOAT$7,\n          'Reading from a framebuffer is only allowed for the types \\'uint8\\' and \\'float\\'')\n\n        if (type === GL_FLOAT$7) {\n          check$1(limits.readFloat, 'Reading \\'float\\' values is not permitted in your browser. For a fallback, please see: https://www.npmjs.com/package/glsl-read-float')\n        }\n      } else {\n        check$1(\n          type === GL_UNSIGNED_BYTE$7,\n          'Reading from a framebuffer is only allowed for the type \\'uint8\\'')\n      }\n    }\n\n    var x = 0\n    var y = 0\n    var width = context.framebufferWidth\n    var height = context.framebufferHeight\n    var data = null\n\n    if (isTypedArray(input)) {\n      data = input\n    } else if (input) {\n      check$1.type(input, 'object', 'invalid arguments to regl.read()')\n      x = input.x | 0\n      y = input.y | 0\n      check$1(\n        x >= 0 && x < context.framebufferWidth,\n        'invalid x offset for regl.read')\n      check$1(\n        y >= 0 && y < context.framebufferHeight,\n        'invalid y offset for regl.read')\n      width = (input.width || (context.framebufferWidth - x)) | 0\n      height = (input.height || (context.framebufferHeight - y)) | 0\n      data = input.data || null\n    }\n\n    // sanity check input.data\n    if (data) {\n      if (type === GL_UNSIGNED_BYTE$7) {\n        check$1(\n          data instanceof Uint8Array,\n          'buffer must be \\'Uint8Array\\' when reading from a framebuffer of type \\'uint8\\'')\n      } else if (type === GL_FLOAT$7) {\n        check$1(\n          data instanceof Float32Array,\n          'buffer must be \\'Float32Array\\' when reading from a framebuffer of type \\'float\\'')\n      }\n    }\n\n    check$1(\n      width > 0 && width + x <= context.framebufferWidth,\n      'invalid width for read pixels')\n    check$1(\n      height > 0 && height + y <= context.framebufferHeight,\n      'invalid height for read pixels')\n\n    // Update WebGL state\n    reglPoll()\n\n    // Compute size\n    var size = width * height * 4\n\n    // Allocate data\n    if (!data) {\n      if (type === GL_UNSIGNED_BYTE$7) {\n        data = new Uint8Array(size)\n      } else if (type === GL_FLOAT$7) {\n        data = data || new Float32Array(size)\n      }\n    }\n\n    // Type check\n    check$1.isTypedArray(data, 'data buffer for regl.read() must be a typedarray')\n    check$1(data.byteLength >= size, 'data buffer for regl.read() too small')\n\n    // Run read pixels\n    gl.pixelStorei(GL_PACK_ALIGNMENT, 4)\n    gl.readPixels(x, y, width, height, GL_RGBA$3,\n      type,\n      data)\n\n    return data\n  }\n\n  function readPixelsFBO (options) {\n    var result\n    framebufferState.setFBO({\n      framebuffer: options.framebuffer\n    }, function () {\n      result = readPixelsImpl(options)\n    })\n    return result\n  }\n\n  function readPixels (options) {\n    if (!options || !('framebuffer' in options)) {\n      return readPixelsImpl(options)\n    } else {\n      return readPixelsFBO(options)\n    }\n  }\n\n  return readPixels\n}\n\nfunction slice (x) {\n  return Array.prototype.slice.call(x)\n}\n\nfunction join (x) {\n  return slice(x).join('')\n}\n\nfunction createEnvironment () {\n  // Unique variable id counter\n  var varCounter = 0\n\n  // Linked values are passed from this scope into the generated code block\n  // Calling link() passes a value into the generated scope and returns\n  // the variable name which it is bound to\n  var linkedNames = []\n  var linkedValues = []\n  function link (value) {\n    for (var i = 0; i < linkedValues.length; ++i) {\n      if (linkedValues[i] === value) {\n        return linkedNames[i]\n      }\n    }\n\n    var name = 'g' + (varCounter++)\n    linkedNames.push(name)\n    linkedValues.push(value)\n    return name\n  }\n\n  // create a code block\n  function block () {\n    var code = []\n    function push () {\n      code.push.apply(code, slice(arguments))\n    }\n\n    var vars = []\n    function def () {\n      var name = 'v' + (varCounter++)\n      vars.push(name)\n\n      if (arguments.length > 0) {\n        code.push(name, '=')\n        code.push.apply(code, slice(arguments))\n        code.push(';')\n      }\n\n      return name\n    }\n\n    return extend(push, {\n      def: def,\n      toString: function () {\n        return join([\n          (vars.length > 0 ? 'var ' + vars.join(',') + ';' : ''),\n          join(code)\n        ])\n      }\n    })\n  }\n\n  function scope () {\n    var entry = block()\n    var exit = block()\n\n    var entryToString = entry.toString\n    var exitToString = exit.toString\n\n    function save (object, prop) {\n      exit(object, prop, '=', entry.def(object, prop), ';')\n    }\n\n    return extend(function () {\n      entry.apply(entry, slice(arguments))\n    }, {\n      def: entry.def,\n      entry: entry,\n      exit: exit,\n      save: save,\n      set: function (object, prop, value) {\n        save(object, prop)\n        entry(object, prop, '=', value, ';')\n      },\n      toString: function () {\n        return entryToString() + exitToString()\n      }\n    })\n  }\n\n  function conditional () {\n    var pred = join(arguments)\n    var thenBlock = scope()\n    var elseBlock = scope()\n\n    var thenToString = thenBlock.toString\n    var elseToString = elseBlock.toString\n\n    return extend(thenBlock, {\n      then: function () {\n        thenBlock.apply(thenBlock, slice(arguments))\n        return this\n      },\n      else: function () {\n        elseBlock.apply(elseBlock, slice(arguments))\n        return this\n      },\n      toString: function () {\n        var elseClause = elseToString()\n        if (elseClause) {\n          elseClause = 'else{' + elseClause + '}'\n        }\n        return join([\n          'if(', pred, '){',\n          thenToString(),\n          '}', elseClause\n        ])\n      }\n    })\n  }\n\n  // procedure list\n  var globalBlock = block()\n  var procedures = {}\n  function proc (name, count) {\n    var args = []\n    function arg () {\n      var name = 'a' + args.length\n      args.push(name)\n      return name\n    }\n\n    count = count || 0\n    for (var i = 0; i < count; ++i) {\n      arg()\n    }\n\n    var body = scope()\n    var bodyToString = body.toString\n\n    var result = procedures[name] = extend(body, {\n      arg: arg,\n      toString: function () {\n        return join([\n          'function(', args.join(), '){',\n          bodyToString(),\n          '}'\n        ])\n      }\n    })\n\n    return result\n  }\n\n  function compile () {\n    var code = ['\"use strict\";',\n      globalBlock,\n      'return {']\n    Object.keys(procedures).forEach(function (name) {\n      code.push('\"', name, '\":', procedures[name].toString(), ',')\n    })\n    code.push('}')\n    var src = join(code)\n      .replace(/;/g, ';\\n')\n      .replace(/}/g, '}\\n')\n      .replace(/{/g, '{\\n')\n    var proc = Function.apply(null, linkedNames.concat(src))\n    return proc.apply(null, linkedValues)\n  }\n\n  return {\n    global: globalBlock,\n    link: link,\n    block: block,\n    proc: proc,\n    scope: scope,\n    cond: conditional,\n    compile: compile\n  }\n}\n\n// \"cute\" names for vector components\nvar CUTE_COMPONENTS = 'xyzw'.split('')\n\nvar GL_UNSIGNED_BYTE$8 = 5121\n\nvar ATTRIB_STATE_POINTER = 1\nvar ATTRIB_STATE_CONSTANT = 2\n\nvar DYN_FUNC$1 = 0\nvar DYN_PROP$1 = 1\nvar DYN_CONTEXT$1 = 2\nvar DYN_STATE$1 = 3\nvar DYN_THUNK = 4\nvar DYN_CONSTANT$1 = 5\nvar DYN_ARRAY$1 = 6\n\nvar S_DITHER = 'dither'\nvar S_BLEND_ENABLE = 'blend.enable'\nvar S_BLEND_COLOR = 'blend.color'\nvar S_BLEND_EQUATION = 'blend.equation'\nvar S_BLEND_FUNC = 'blend.func'\nvar S_DEPTH_ENABLE = 'depth.enable'\nvar S_DEPTH_FUNC = 'depth.func'\nvar S_DEPTH_RANGE = 'depth.range'\nvar S_DEPTH_MASK = 'depth.mask'\nvar S_COLOR_MASK = 'colorMask'\nvar S_CULL_ENABLE = 'cull.enable'\nvar S_CULL_FACE = 'cull.face'\nvar S_FRONT_FACE = 'frontFace'\nvar S_LINE_WIDTH = 'lineWidth'\nvar S_POLYGON_OFFSET_ENABLE = 'polygonOffset.enable'\nvar S_POLYGON_OFFSET_OFFSET = 'polygonOffset.offset'\nvar S_SAMPLE_ALPHA = 'sample.alpha'\nvar S_SAMPLE_ENABLE = 'sample.enable'\nvar S_SAMPLE_COVERAGE = 'sample.coverage'\nvar S_STENCIL_ENABLE = 'stencil.enable'\nvar S_STENCIL_MASK = 'stencil.mask'\nvar S_STENCIL_FUNC = 'stencil.func'\nvar S_STENCIL_OPFRONT = 'stencil.opFront'\nvar S_STENCIL_OPBACK = 'stencil.opBack'\nvar S_SCISSOR_ENABLE = 'scissor.enable'\nvar S_SCISSOR_BOX = 'scissor.box'\nvar S_VIEWPORT = 'viewport'\n\nvar S_PROFILE = 'profile'\n\nvar S_FRAMEBUFFER = 'framebuffer'\nvar S_VERT = 'vert'\nvar S_FRAG = 'frag'\nvar S_ELEMENTS = 'elements'\nvar S_PRIMITIVE = 'primitive'\nvar S_COUNT = 'count'\nvar S_OFFSET = 'offset'\nvar S_INSTANCES = 'instances'\nvar S_VAO = 'vao'\n\nvar SUFFIX_WIDTH = 'Width'\nvar SUFFIX_HEIGHT = 'Height'\n\nvar S_FRAMEBUFFER_WIDTH = S_FRAMEBUFFER + SUFFIX_WIDTH\nvar S_FRAMEBUFFER_HEIGHT = S_FRAMEBUFFER + SUFFIX_HEIGHT\nvar S_VIEWPORT_WIDTH = S_VIEWPORT + SUFFIX_WIDTH\nvar S_VIEWPORT_HEIGHT = S_VIEWPORT + SUFFIX_HEIGHT\nvar S_DRAWINGBUFFER = 'drawingBuffer'\nvar S_DRAWINGBUFFER_WIDTH = S_DRAWINGBUFFER + SUFFIX_WIDTH\nvar S_DRAWINGBUFFER_HEIGHT = S_DRAWINGBUFFER + SUFFIX_HEIGHT\n\nvar NESTED_OPTIONS = [\n  S_BLEND_FUNC,\n  S_BLEND_EQUATION,\n  S_STENCIL_FUNC,\n  S_STENCIL_OPFRONT,\n  S_STENCIL_OPBACK,\n  S_SAMPLE_COVERAGE,\n  S_VIEWPORT,\n  S_SCISSOR_BOX,\n  S_POLYGON_OFFSET_OFFSET\n]\n\nvar GL_ARRAY_BUFFER$2 = 34962\nvar GL_ELEMENT_ARRAY_BUFFER$1 = 34963\n\nvar GL_FRAGMENT_SHADER$1 = 35632\nvar GL_VERTEX_SHADER$1 = 35633\n\nvar GL_TEXTURE_2D$3 = 0x0DE1\nvar GL_TEXTURE_CUBE_MAP$2 = 0x8513\n\nvar GL_CULL_FACE = 0x0B44\nvar GL_BLEND = 0x0BE2\nvar GL_DITHER = 0x0BD0\nvar GL_STENCIL_TEST = 0x0B90\nvar GL_DEPTH_TEST = 0x0B71\nvar GL_SCISSOR_TEST = 0x0C11\nvar GL_POLYGON_OFFSET_FILL = 0x8037\nvar GL_SAMPLE_ALPHA_TO_COVERAGE = 0x809E\nvar GL_SAMPLE_COVERAGE = 0x80A0\n\nvar GL_FLOAT$8 = 5126\nvar GL_FLOAT_VEC2 = 35664\nvar GL_FLOAT_VEC3 = 35665\nvar GL_FLOAT_VEC4 = 35666\nvar GL_INT$3 = 5124\nvar GL_INT_VEC2 = 35667\nvar GL_INT_VEC3 = 35668\nvar GL_INT_VEC4 = 35669\nvar GL_BOOL = 35670\nvar GL_BOOL_VEC2 = 35671\nvar GL_BOOL_VEC3 = 35672\nvar GL_BOOL_VEC4 = 35673\nvar GL_FLOAT_MAT2 = 35674\nvar GL_FLOAT_MAT3 = 35675\nvar GL_FLOAT_MAT4 = 35676\nvar GL_SAMPLER_2D = 35678\nvar GL_SAMPLER_CUBE = 35680\n\nvar GL_TRIANGLES$1 = 4\n\nvar GL_FRONT = 1028\nvar GL_BACK = 1029\nvar GL_CW = 0x0900\nvar GL_CCW = 0x0901\nvar GL_MIN_EXT = 0x8007\nvar GL_MAX_EXT = 0x8008\nvar GL_ALWAYS = 519\nvar GL_KEEP = 7680\nvar GL_ZERO = 0\nvar GL_ONE = 1\nvar GL_FUNC_ADD = 0x8006\nvar GL_LESS = 513\n\nvar GL_FRAMEBUFFER$2 = 0x8D40\nvar GL_COLOR_ATTACHMENT0$2 = 0x8CE0\n\nvar blendFuncs = {\n  '0': 0,\n  '1': 1,\n  'zero': 0,\n  'one': 1,\n  'src color': 768,\n  'one minus src color': 769,\n  'src alpha': 770,\n  'one minus src alpha': 771,\n  'dst color': 774,\n  'one minus dst color': 775,\n  'dst alpha': 772,\n  'one minus dst alpha': 773,\n  'constant color': 32769,\n  'one minus constant color': 32770,\n  'constant alpha': 32771,\n  'one minus constant alpha': 32772,\n  'src alpha saturate': 776\n}\n\n// There are invalid values for srcRGB and dstRGB. See:\n// https://www.khronos.org/registry/webgl/specs/1.0/#6.13\n// https://github.com/KhronosGroup/WebGL/blob/0d3201f5f7ec3c0060bc1f04077461541f1987b9/conformance-suites/1.0.3/conformance/misc/webgl-specific.html#L56\nvar invalidBlendCombinations = [\n  'constant color, constant alpha',\n  'one minus constant color, constant alpha',\n  'constant color, one minus constant alpha',\n  'one minus constant color, one minus constant alpha',\n  'constant alpha, constant color',\n  'constant alpha, one minus constant color',\n  'one minus constant alpha, constant color',\n  'one minus constant alpha, one minus constant color'\n]\n\nvar compareFuncs = {\n  'never': 512,\n  'less': 513,\n  '<': 513,\n  'equal': 514,\n  '=': 514,\n  '==': 514,\n  '===': 514,\n  'lequal': 515,\n  '<=': 515,\n  'greater': 516,\n  '>': 516,\n  'notequal': 517,\n  '!=': 517,\n  '!==': 517,\n  'gequal': 518,\n  '>=': 518,\n  'always': 519\n}\n\nvar stencilOps = {\n  '0': 0,\n  'zero': 0,\n  'keep': 7680,\n  'replace': 7681,\n  'increment': 7682,\n  'decrement': 7683,\n  'increment wrap': 34055,\n  'decrement wrap': 34056,\n  'invert': 5386\n}\n\nvar shaderType = {\n  'frag': GL_FRAGMENT_SHADER$1,\n  'vert': GL_VERTEX_SHADER$1\n}\n\nvar orientationType = {\n  'cw': GL_CW,\n  'ccw': GL_CCW\n}\n\nfunction isBufferArgs (x) {\n  return Array.isArray(x) ||\n    isTypedArray(x) ||\n    isNDArrayLike(x)\n}\n\n// Make sure viewport is processed first\nfunction sortState (state) {\n  return state.sort(function (a, b) {\n    if (a === S_VIEWPORT) {\n      return -1\n    } else if (b === S_VIEWPORT) {\n      return 1\n    }\n    return (a < b) ? -1 : 1\n  })\n}\n\nfunction Declaration (thisDep, contextDep, propDep, append) {\n  this.thisDep = thisDep\n  this.contextDep = contextDep\n  this.propDep = propDep\n  this.append = append\n}\n\nfunction isStatic (decl) {\n  return decl && !(decl.thisDep || decl.contextDep || decl.propDep)\n}\n\nfunction createStaticDecl (append) {\n  return new Declaration(false, false, false, append)\n}\n\nfunction createDynamicDecl (dyn, append) {\n  var type = dyn.type\n  if (type === DYN_FUNC$1) {\n    var numArgs = dyn.data.length\n    return new Declaration(\n      true,\n      numArgs >= 1,\n      numArgs >= 2,\n      append)\n  } else if (type === DYN_THUNK) {\n    var data = dyn.data\n    return new Declaration(\n      data.thisDep,\n      data.contextDep,\n      data.propDep,\n      append)\n  } else if (type === DYN_CONSTANT$1) {\n    return new Declaration(\n      false,\n      false,\n      false,\n      append)\n  } else if (type === DYN_ARRAY$1) {\n    var thisDep = false\n    var contextDep = false\n    var propDep = false\n    for (var i = 0; i < dyn.data.length; ++i) {\n      var subDyn = dyn.data[i]\n      if (subDyn.type === DYN_PROP$1) {\n        propDep = true\n      } else if (subDyn.type === DYN_CONTEXT$1) {\n        contextDep = true\n      } else if (subDyn.type === DYN_STATE$1) {\n        thisDep = true\n      } else if (subDyn.type === DYN_FUNC$1) {\n        thisDep = true\n        var subArgs = subDyn.data\n        if (subArgs >= 1) {\n          contextDep = true\n        }\n        if (subArgs >= 2) {\n          propDep = true\n        }\n      } else if (subDyn.type === DYN_THUNK) {\n        thisDep = thisDep || subDyn.data.thisDep\n        contextDep = contextDep || subDyn.data.contextDep\n        propDep = propDep || subDyn.data.propDep\n      }\n    }\n    return new Declaration(\n      thisDep,\n      contextDep,\n      propDep,\n      append)\n  } else {\n    return new Declaration(\n      type === DYN_STATE$1,\n      type === DYN_CONTEXT$1,\n      type === DYN_PROP$1,\n      append)\n  }\n}\n\nvar SCOPE_DECL = new Declaration(false, false, false, function () {})\n\nfunction reglCore (\n  gl,\n  stringStore,\n  extensions,\n  limits,\n  bufferState,\n  elementState,\n  textureState,\n  framebufferState,\n  uniformState,\n  attributeState,\n  shaderState,\n  drawState,\n  contextState,\n  timer,\n  config) {\n  var AttributeRecord = attributeState.Record\n\n  var blendEquations = {\n    'add': 32774,\n    'subtract': 32778,\n    'reverse subtract': 32779\n  }\n  if (extensions.ext_blend_minmax) {\n    blendEquations.min = GL_MIN_EXT\n    blendEquations.max = GL_MAX_EXT\n  }\n\n  var extInstancing = extensions.angle_instanced_arrays\n  var extDrawBuffers = extensions.webgl_draw_buffers\n\n  // ===================================================\n  // ===================================================\n  // WEBGL STATE\n  // ===================================================\n  // ===================================================\n  var currentState = {\n    dirty: true,\n    profile: config.profile\n  }\n  var nextState = {}\n  var GL_STATE_NAMES = []\n  var GL_FLAGS = {}\n  var GL_VARIABLES = {}\n\n  function propName (name) {\n    return name.replace('.', '_')\n  }\n\n  function stateFlag (sname, cap, init) {\n    var name = propName(sname)\n    GL_STATE_NAMES.push(sname)\n    nextState[name] = currentState[name] = !!init\n    GL_FLAGS[name] = cap\n  }\n\n  function stateVariable (sname, func, init) {\n    var name = propName(sname)\n    GL_STATE_NAMES.push(sname)\n    if (Array.isArray(init)) {\n      currentState[name] = init.slice()\n      nextState[name] = init.slice()\n    } else {\n      currentState[name] = nextState[name] = init\n    }\n    GL_VARIABLES[name] = func\n  }\n\n  // Dithering\n  stateFlag(S_DITHER, GL_DITHER)\n\n  // Blending\n  stateFlag(S_BLEND_ENABLE, GL_BLEND)\n  stateVariable(S_BLEND_COLOR, 'blendColor', [0, 0, 0, 0])\n  stateVariable(S_BLEND_EQUATION, 'blendEquationSeparate',\n    [GL_FUNC_ADD, GL_FUNC_ADD])\n  stateVariable(S_BLEND_FUNC, 'blendFuncSeparate',\n    [GL_ONE, GL_ZERO, GL_ONE, GL_ZERO])\n\n  // Depth\n  stateFlag(S_DEPTH_ENABLE, GL_DEPTH_TEST, true)\n  stateVariable(S_DEPTH_FUNC, 'depthFunc', GL_LESS)\n  stateVariable(S_DEPTH_RANGE, 'depthRange', [0, 1])\n  stateVariable(S_DEPTH_MASK, 'depthMask', true)\n\n  // Color mask\n  stateVariable(S_COLOR_MASK, S_COLOR_MASK, [true, true, true, true])\n\n  // Face culling\n  stateFlag(S_CULL_ENABLE, GL_CULL_FACE)\n  stateVariable(S_CULL_FACE, 'cullFace', GL_BACK)\n\n  // Front face orientation\n  stateVariable(S_FRONT_FACE, S_FRONT_FACE, GL_CCW)\n\n  // Line width\n  stateVariable(S_LINE_WIDTH, S_LINE_WIDTH, 1)\n\n  // Polygon offset\n  stateFlag(S_POLYGON_OFFSET_ENABLE, GL_POLYGON_OFFSET_FILL)\n  stateVariable(S_POLYGON_OFFSET_OFFSET, 'polygonOffset', [0, 0])\n\n  // Sample coverage\n  stateFlag(S_SAMPLE_ALPHA, GL_SAMPLE_ALPHA_TO_COVERAGE)\n  stateFlag(S_SAMPLE_ENABLE, GL_SAMPLE_COVERAGE)\n  stateVariable(S_SAMPLE_COVERAGE, 'sampleCoverage', [1, false])\n\n  // Stencil\n  stateFlag(S_STENCIL_ENABLE, GL_STENCIL_TEST)\n  stateVariable(S_STENCIL_MASK, 'stencilMask', -1)\n  stateVariable(S_STENCIL_FUNC, 'stencilFunc', [GL_ALWAYS, 0, -1])\n  stateVariable(S_STENCIL_OPFRONT, 'stencilOpSeparate',\n    [GL_FRONT, GL_KEEP, GL_KEEP, GL_KEEP])\n  stateVariable(S_STENCIL_OPBACK, 'stencilOpSeparate',\n    [GL_BACK, GL_KEEP, GL_KEEP, GL_KEEP])\n\n  // Scissor\n  stateFlag(S_SCISSOR_ENABLE, GL_SCISSOR_TEST)\n  stateVariable(S_SCISSOR_BOX, 'scissor',\n    [0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight])\n\n  // Viewport\n  stateVariable(S_VIEWPORT, S_VIEWPORT,\n    [0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight])\n\n  // ===================================================\n  // ===================================================\n  // ENVIRONMENT\n  // ===================================================\n  // ===================================================\n  var sharedState = {\n    gl: gl,\n    context: contextState,\n    strings: stringStore,\n    next: nextState,\n    current: currentState,\n    draw: drawState,\n    elements: elementState,\n    buffer: bufferState,\n    shader: shaderState,\n    attributes: attributeState.state,\n    vao: attributeState,\n    uniforms: uniformState,\n    framebuffer: framebufferState,\n    extensions: extensions,\n\n    timer: timer,\n    isBufferArgs: isBufferArgs\n  }\n\n  var sharedConstants = {\n    primTypes: primTypes,\n    compareFuncs: compareFuncs,\n    blendFuncs: blendFuncs,\n    blendEquations: blendEquations,\n    stencilOps: stencilOps,\n    glTypes: glTypes,\n    orientationType: orientationType\n  }\n\n  check$1.optional(function () {\n    sharedState.isArrayLike = isArrayLike\n  })\n\n  if (extDrawBuffers) {\n    sharedConstants.backBuffer = [GL_BACK]\n    sharedConstants.drawBuffer = loop(limits.maxDrawbuffers, function (i) {\n      if (i === 0) {\n        return [0]\n      }\n      return loop(i, function (j) {\n        return GL_COLOR_ATTACHMENT0$2 + j\n      })\n    })\n  }\n\n  var drawCallCounter = 0\n  function createREGLEnvironment () {\n    var env = createEnvironment()\n    var link = env.link\n    var global = env.global\n    env.id = drawCallCounter++\n\n    env.batchId = '0'\n\n    // link shared state\n    var SHARED = link(sharedState)\n    var shared = env.shared = {\n      props: 'a0'\n    }\n    Object.keys(sharedState).forEach(function (prop) {\n      shared[prop] = global.def(SHARED, '.', prop)\n    })\n\n    // Inject runtime assertion stuff for debug builds\n    check$1.optional(function () {\n      env.CHECK = link(check$1)\n      env.commandStr = check$1.guessCommand()\n      env.command = link(env.commandStr)\n      env.assert = function (block, pred, message) {\n        block(\n          'if(!(', pred, '))',\n          this.CHECK, '.commandRaise(', link(message), ',', this.command, ');')\n      }\n\n      sharedConstants.invalidBlendCombinations = invalidBlendCombinations\n    })\n\n    // Copy GL state variables over\n    var nextVars = env.next = {}\n    var currentVars = env.current = {}\n    Object.keys(GL_VARIABLES).forEach(function (variable) {\n      if (Array.isArray(currentState[variable])) {\n        nextVars[variable] = global.def(shared.next, '.', variable)\n        currentVars[variable] = global.def(shared.current, '.', variable)\n      }\n    })\n\n    // Initialize shared constants\n    var constants = env.constants = {}\n    Object.keys(sharedConstants).forEach(function (name) {\n      constants[name] = global.def(JSON.stringify(sharedConstants[name]))\n    })\n\n    // Helper function for calling a block\n    env.invoke = function (block, x) {\n      switch (x.type) {\n        case DYN_FUNC$1:\n          var argList = [\n            'this',\n            shared.context,\n            shared.props,\n            env.batchId\n          ]\n          return block.def(\n            link(x.data), '.call(',\n            argList.slice(0, Math.max(x.data.length + 1, 4)),\n            ')')\n        case DYN_PROP$1:\n          return block.def(shared.props, x.data)\n        case DYN_CONTEXT$1:\n          return block.def(shared.context, x.data)\n        case DYN_STATE$1:\n          return block.def('this', x.data)\n        case DYN_THUNK:\n          x.data.append(env, block)\n          return x.data.ref\n        case DYN_CONSTANT$1:\n          return x.data.toString()\n        case DYN_ARRAY$1:\n          return x.data.map(function (y) {\n            return env.invoke(block, y)\n          })\n      }\n    }\n\n    env.attribCache = {}\n\n    var scopeAttribs = {}\n    env.scopeAttrib = function (name) {\n      var id = stringStore.id(name)\n      if (id in scopeAttribs) {\n        return scopeAttribs[id]\n      }\n      var binding = attributeState.scope[id]\n      if (!binding) {\n        binding = attributeState.scope[id] = new AttributeRecord()\n      }\n      var result = scopeAttribs[id] = link(binding)\n      return result\n    }\n\n    return env\n  }\n\n  // ===================================================\n  // ===================================================\n  // PARSING\n  // ===================================================\n  // ===================================================\n  function parseProfile (options) {\n    var staticOptions = options.static\n    var dynamicOptions = options.dynamic\n\n    var profileEnable\n    if (S_PROFILE in staticOptions) {\n      var value = !!staticOptions[S_PROFILE]\n      profileEnable = createStaticDecl(function (env, scope) {\n        return value\n      })\n      profileEnable.enable = value\n    } else if (S_PROFILE in dynamicOptions) {\n      var dyn = dynamicOptions[S_PROFILE]\n      profileEnable = createDynamicDecl(dyn, function (env, scope) {\n        return env.invoke(scope, dyn)\n      })\n    }\n\n    return profileEnable\n  }\n\n  function parseFramebuffer (options, env) {\n    var staticOptions = options.static\n    var dynamicOptions = options.dynamic\n\n    if (S_FRAMEBUFFER in staticOptions) {\n      var framebuffer = staticOptions[S_FRAMEBUFFER]\n      if (framebuffer) {\n        framebuffer = framebufferState.getFramebuffer(framebuffer)\n        check$1.command(framebuffer, 'invalid framebuffer object')\n        return createStaticDecl(function (env, block) {\n          var FRAMEBUFFER = env.link(framebuffer)\n          var shared = env.shared\n          block.set(\n            shared.framebuffer,\n            '.next',\n            FRAMEBUFFER)\n          var CONTEXT = shared.context\n          block.set(\n            CONTEXT,\n            '.' + S_FRAMEBUFFER_WIDTH,\n            FRAMEBUFFER + '.width')\n          block.set(\n            CONTEXT,\n            '.' + S_FRAMEBUFFER_HEIGHT,\n            FRAMEBUFFER + '.height')\n          return FRAMEBUFFER\n        })\n      } else {\n        return createStaticDecl(function (env, scope) {\n          var shared = env.shared\n          scope.set(\n            shared.framebuffer,\n            '.next',\n            'null')\n          var CONTEXT = shared.context\n          scope.set(\n            CONTEXT,\n            '.' + S_FRAMEBUFFER_WIDTH,\n            CONTEXT + '.' + S_DRAWINGBUFFER_WIDTH)\n          scope.set(\n            CONTEXT,\n            '.' + S_FRAMEBUFFER_HEIGHT,\n            CONTEXT + '.' + S_DRAWINGBUFFER_HEIGHT)\n          return 'null'\n        })\n      }\n    } else if (S_FRAMEBUFFER in dynamicOptions) {\n      var dyn = dynamicOptions[S_FRAMEBUFFER]\n      return createDynamicDecl(dyn, function (env, scope) {\n        var FRAMEBUFFER_FUNC = env.invoke(scope, dyn)\n        var shared = env.shared\n        var FRAMEBUFFER_STATE = shared.framebuffer\n        var FRAMEBUFFER = scope.def(\n          FRAMEBUFFER_STATE, '.getFramebuffer(', FRAMEBUFFER_FUNC, ')')\n\n        check$1.optional(function () {\n          env.assert(scope,\n            '!' + FRAMEBUFFER_FUNC + '||' + FRAMEBUFFER,\n            'invalid framebuffer object')\n        })\n\n        scope.set(\n          FRAMEBUFFER_STATE,\n          '.next',\n          FRAMEBUFFER)\n        var CONTEXT = shared.context\n        scope.set(\n          CONTEXT,\n          '.' + S_FRAMEBUFFER_WIDTH,\n          FRAMEBUFFER + '?' + FRAMEBUFFER + '.width:' +\n          CONTEXT + '.' + S_DRAWINGBUFFER_WIDTH)\n        scope.set(\n          CONTEXT,\n          '.' + S_FRAMEBUFFER_HEIGHT,\n          FRAMEBUFFER +\n          '?' + FRAMEBUFFER + '.height:' +\n          CONTEXT + '.' + S_DRAWINGBUFFER_HEIGHT)\n        return FRAMEBUFFER\n      })\n    } else {\n      return null\n    }\n  }\n\n  function parseViewportScissor (options, framebuffer, env) {\n    var staticOptions = options.static\n    var dynamicOptions = options.dynamic\n\n    function parseBox (param) {\n      if (param in staticOptions) {\n        var box = staticOptions[param]\n        check$1.commandType(box, 'object', 'invalid ' + param, env.commandStr)\n\n        var isStatic = true\n        var x = box.x | 0\n        var y = box.y | 0\n        var w, h\n        if ('width' in box) {\n          w = box.width | 0\n          check$1.command(w >= 0, 'invalid ' + param, env.commandStr)\n        } else {\n          isStatic = false\n        }\n        if ('height' in box) {\n          h = box.height | 0\n          check$1.command(h >= 0, 'invalid ' + param, env.commandStr)\n        } else {\n          isStatic = false\n        }\n\n        return new Declaration(\n          !isStatic && framebuffer && framebuffer.thisDep,\n          !isStatic && framebuffer && framebuffer.contextDep,\n          !isStatic && framebuffer && framebuffer.propDep,\n          function (env, scope) {\n            var CONTEXT = env.shared.context\n            var BOX_W = w\n            if (!('width' in box)) {\n              BOX_W = scope.def(CONTEXT, '.', S_FRAMEBUFFER_WIDTH, '-', x)\n            }\n            var BOX_H = h\n            if (!('height' in box)) {\n              BOX_H = scope.def(CONTEXT, '.', S_FRAMEBUFFER_HEIGHT, '-', y)\n            }\n            return [x, y, BOX_W, BOX_H]\n          })\n      } else if (param in dynamicOptions) {\n        var dynBox = dynamicOptions[param]\n        var result = createDynamicDecl(dynBox, function (env, scope) {\n          var BOX = env.invoke(scope, dynBox)\n\n          check$1.optional(function () {\n            env.assert(scope,\n              BOX + '&&typeof ' + BOX + '===\"object\"',\n              'invalid ' + param)\n          })\n\n          var CONTEXT = env.shared.context\n          var BOX_X = scope.def(BOX, '.x|0')\n          var BOX_Y = scope.def(BOX, '.y|0')\n          var BOX_W = scope.def(\n            '\"width\" in ', BOX, '?', BOX, '.width|0:',\n            '(', CONTEXT, '.', S_FRAMEBUFFER_WIDTH, '-', BOX_X, ')')\n          var BOX_H = scope.def(\n            '\"height\" in ', BOX, '?', BOX, '.height|0:',\n            '(', CONTEXT, '.', S_FRAMEBUFFER_HEIGHT, '-', BOX_Y, ')')\n\n          check$1.optional(function () {\n            env.assert(scope,\n              BOX_W + '>=0&&' +\n              BOX_H + '>=0',\n              'invalid ' + param)\n          })\n\n          return [BOX_X, BOX_Y, BOX_W, BOX_H]\n        })\n        if (framebuffer) {\n          result.thisDep = result.thisDep || framebuffer.thisDep\n          result.contextDep = result.contextDep || framebuffer.contextDep\n          result.propDep = result.propDep || framebuffer.propDep\n        }\n        return result\n      } else if (framebuffer) {\n        return new Declaration(\n          framebuffer.thisDep,\n          framebuffer.contextDep,\n          framebuffer.propDep,\n          function (env, scope) {\n            var CONTEXT = env.shared.context\n            return [\n              0, 0,\n              scope.def(CONTEXT, '.', S_FRAMEBUFFER_WIDTH),\n              scope.def(CONTEXT, '.', S_FRAMEBUFFER_HEIGHT)]\n          })\n      } else {\n        return null\n      }\n    }\n\n    var viewport = parseBox(S_VIEWPORT)\n\n    if (viewport) {\n      var prevViewport = viewport\n      viewport = new Declaration(\n        viewport.thisDep,\n        viewport.contextDep,\n        viewport.propDep,\n        function (env, scope) {\n          var VIEWPORT = prevViewport.append(env, scope)\n          var CONTEXT = env.shared.context\n          scope.set(\n            CONTEXT,\n            '.' + S_VIEWPORT_WIDTH,\n            VIEWPORT[2])\n          scope.set(\n            CONTEXT,\n            '.' + S_VIEWPORT_HEIGHT,\n            VIEWPORT[3])\n          return VIEWPORT\n        })\n    }\n\n    return {\n      viewport: viewport,\n      scissor_box: parseBox(S_SCISSOR_BOX)\n    }\n  }\n\n  function parseAttribLocations (options, attributes) {\n    var staticOptions = options.static\n    var staticProgram =\n      typeof staticOptions[S_FRAG] === 'string' &&\n      typeof staticOptions[S_VERT] === 'string'\n    if (staticProgram) {\n      if (Object.keys(attributes.dynamic).length > 0) {\n        return null\n      }\n      var staticAttributes = attributes.static\n      var sAttributes = Object.keys(staticAttributes)\n      if (sAttributes.length > 0 && typeof staticAttributes[sAttributes[0]] === 'number') {\n        var bindings = []\n        for (var i = 0; i < sAttributes.length; ++i) {\n          check$1(typeof staticAttributes[sAttributes[i]] === 'number', 'must specify all vertex attribute locations when using vaos')\n          bindings.push([staticAttributes[sAttributes[i]] | 0, sAttributes[i]])\n        }\n        return bindings\n      }\n    }\n    return null\n  }\n\n  function parseProgram (options, env, attribLocations) {\n    var staticOptions = options.static\n    var dynamicOptions = options.dynamic\n\n    function parseShader (name) {\n      if (name in staticOptions) {\n        var id = stringStore.id(staticOptions[name])\n        check$1.optional(function () {\n          shaderState.shader(shaderType[name], id, check$1.guessCommand())\n        })\n        var result = createStaticDecl(function () {\n          return id\n        })\n        result.id = id\n        return result\n      } else if (name in dynamicOptions) {\n        var dyn = dynamicOptions[name]\n        return createDynamicDecl(dyn, function (env, scope) {\n          var str = env.invoke(scope, dyn)\n          var id = scope.def(env.shared.strings, '.id(', str, ')')\n          check$1.optional(function () {\n            scope(\n              env.shared.shader, '.shader(',\n              shaderType[name], ',',\n              id, ',',\n              env.command, ');')\n          })\n          return id\n        })\n      }\n      return null\n    }\n\n    var frag = parseShader(S_FRAG)\n    var vert = parseShader(S_VERT)\n\n    var program = null\n    var progVar\n    if (isStatic(frag) && isStatic(vert)) {\n      program = shaderState.program(vert.id, frag.id, null, attribLocations)\n      progVar = createStaticDecl(function (env, scope) {\n        return env.link(program)\n      })\n    } else {\n      progVar = new Declaration(\n        (frag && frag.thisDep) || (vert && vert.thisDep),\n        (frag && frag.contextDep) || (vert && vert.contextDep),\n        (frag && frag.propDep) || (vert && vert.propDep),\n        function (env, scope) {\n          var SHADER_STATE = env.shared.shader\n          var fragId\n          if (frag) {\n            fragId = frag.append(env, scope)\n          } else {\n            fragId = scope.def(SHADER_STATE, '.', S_FRAG)\n          }\n          var vertId\n          if (vert) {\n            vertId = vert.append(env, scope)\n          } else {\n            vertId = scope.def(SHADER_STATE, '.', S_VERT)\n          }\n          var progDef = SHADER_STATE + '.program(' + vertId + ',' + fragId\n          check$1.optional(function () {\n            progDef += ',' + env.command\n          })\n          return scope.def(progDef + ')')\n        })\n    }\n\n    return {\n      frag: frag,\n      vert: vert,\n      progVar: progVar,\n      program: program\n    }\n  }\n\n  function parseDraw (options, env) {\n    var staticOptions = options.static\n    var dynamicOptions = options.dynamic\n\n    function parseElements () {\n      if (S_ELEMENTS in staticOptions) {\n        var elements = staticOptions[S_ELEMENTS]\n        if (isBufferArgs(elements)) {\n          elements = elementState.getElements(elementState.create(elements, true))\n        } else if (elements) {\n          elements = elementState.getElements(elements)\n          check$1.command(elements, 'invalid elements', env.commandStr)\n        }\n        var result = createStaticDecl(function (env, scope) {\n          if (elements) {\n            var result = env.link(elements)\n            env.ELEMENTS = result\n            return result\n          }\n          env.ELEMENTS = null\n          return null\n        })\n        result.value = elements\n        return result\n      } else if (S_ELEMENTS in dynamicOptions) {\n        var dyn = dynamicOptions[S_ELEMENTS]\n        return createDynamicDecl(dyn, function (env, scope) {\n          var shared = env.shared\n\n          var IS_BUFFER_ARGS = shared.isBufferArgs\n          var ELEMENT_STATE = shared.elements\n\n          var elementDefn = env.invoke(scope, dyn)\n          var elements = scope.def('null')\n          var elementStream = scope.def(IS_BUFFER_ARGS, '(', elementDefn, ')')\n\n          var ifte = env.cond(elementStream)\n            .then(elements, '=', ELEMENT_STATE, '.createStream(', elementDefn, ');')\n            .else(elements, '=', ELEMENT_STATE, '.getElements(', elementDefn, ');')\n\n          check$1.optional(function () {\n            env.assert(ifte.else,\n              '!' + elementDefn + '||' + elements,\n              'invalid elements')\n          })\n\n          scope.entry(ifte)\n          scope.exit(\n            env.cond(elementStream)\n              .then(ELEMENT_STATE, '.destroyStream(', elements, ');'))\n\n          env.ELEMENTS = elements\n\n          return elements\n        })\n      }\n\n      return null\n    }\n\n    var elements = parseElements()\n\n    function parsePrimitive () {\n      if (S_PRIMITIVE in staticOptions) {\n        var primitive = staticOptions[S_PRIMITIVE]\n        check$1.commandParameter(primitive, primTypes, 'invalid primitve', env.commandStr)\n        return createStaticDecl(function (env, scope) {\n          return primTypes[primitive]\n        })\n      } else if (S_PRIMITIVE in dynamicOptions) {\n        var dynPrimitive = dynamicOptions[S_PRIMITIVE]\n        return createDynamicDecl(dynPrimitive, function (env, scope) {\n          var PRIM_TYPES = env.constants.primTypes\n          var prim = env.invoke(scope, dynPrimitive)\n          check$1.optional(function () {\n            env.assert(scope,\n              prim + ' in ' + PRIM_TYPES,\n              'invalid primitive, must be one of ' + Object.keys(primTypes))\n          })\n          return scope.def(PRIM_TYPES, '[', prim, ']')\n        })\n      } else if (elements) {\n        if (isStatic(elements)) {\n          if (elements.value) {\n            return createStaticDecl(function (env, scope) {\n              return scope.def(env.ELEMENTS, '.primType')\n            })\n          } else {\n            return createStaticDecl(function () {\n              return GL_TRIANGLES$1\n            })\n          }\n        } else {\n          return new Declaration(\n            elements.thisDep,\n            elements.contextDep,\n            elements.propDep,\n            function (env, scope) {\n              var elements = env.ELEMENTS\n              return scope.def(elements, '?', elements, '.primType:', GL_TRIANGLES$1)\n            })\n        }\n      }\n      return null\n    }\n\n    function parseParam (param, isOffset) {\n      if (param in staticOptions) {\n        var value = staticOptions[param] | 0\n        check$1.command(!isOffset || value >= 0, 'invalid ' + param, env.commandStr)\n        return createStaticDecl(function (env, scope) {\n          if (isOffset) {\n            env.OFFSET = value\n          }\n          return value\n        })\n      } else if (param in dynamicOptions) {\n        var dynValue = dynamicOptions[param]\n        return createDynamicDecl(dynValue, function (env, scope) {\n          var result = env.invoke(scope, dynValue)\n          if (isOffset) {\n            env.OFFSET = result\n            check$1.optional(function () {\n              env.assert(scope,\n                result + '>=0',\n                'invalid ' + param)\n            })\n          }\n          return result\n        })\n      } else if (isOffset && elements) {\n        return createStaticDecl(function (env, scope) {\n          env.OFFSET = '0'\n          return 0\n        })\n      }\n      return null\n    }\n\n    var OFFSET = parseParam(S_OFFSET, true)\n\n    function parseVertCount () {\n      if (S_COUNT in staticOptions) {\n        var count = staticOptions[S_COUNT] | 0\n        check$1.command(\n          typeof count === 'number' && count >= 0, 'invalid vertex count', env.commandStr)\n        return createStaticDecl(function () {\n          return count\n        })\n      } else if (S_COUNT in dynamicOptions) {\n        var dynCount = dynamicOptions[S_COUNT]\n        return createDynamicDecl(dynCount, function (env, scope) {\n          var result = env.invoke(scope, dynCount)\n          check$1.optional(function () {\n            env.assert(scope,\n              'typeof ' + result + '===\"number\"&&' +\n              result + '>=0&&' +\n              result + '===(' + result + '|0)',\n              'invalid vertex count')\n          })\n          return result\n        })\n      } else if (elements) {\n        if (isStatic(elements)) {\n          if (elements) {\n            if (OFFSET) {\n              return new Declaration(\n                OFFSET.thisDep,\n                OFFSET.contextDep,\n                OFFSET.propDep,\n                function (env, scope) {\n                  var result = scope.def(\n                    env.ELEMENTS, '.vertCount-', env.OFFSET)\n\n                  check$1.optional(function () {\n                    env.assert(scope,\n                      result + '>=0',\n                      'invalid vertex offset/element buffer too small')\n                  })\n\n                  return result\n                })\n            } else {\n              return createStaticDecl(function (env, scope) {\n                return scope.def(env.ELEMENTS, '.vertCount')\n              })\n            }\n          } else {\n            var result = createStaticDecl(function () {\n              return -1\n            })\n            check$1.optional(function () {\n              result.MISSING = true\n            })\n            return result\n          }\n        } else {\n          var variable = new Declaration(\n            elements.thisDep || OFFSET.thisDep,\n            elements.contextDep || OFFSET.contextDep,\n            elements.propDep || OFFSET.propDep,\n            function (env, scope) {\n              var elements = env.ELEMENTS\n              if (env.OFFSET) {\n                return scope.def(elements, '?', elements, '.vertCount-',\n                  env.OFFSET, ':-1')\n              }\n              return scope.def(elements, '?', elements, '.vertCount:-1')\n            })\n          check$1.optional(function () {\n            variable.DYNAMIC = true\n          })\n          return variable\n        }\n      }\n      return null\n    }\n\n    return {\n      elements: elements,\n      primitive: parsePrimitive(),\n      count: parseVertCount(),\n      instances: parseParam(S_INSTANCES, false),\n      offset: OFFSET\n    }\n  }\n\n  function parseGLState (options, env) {\n    var staticOptions = options.static\n    var dynamicOptions = options.dynamic\n\n    var STATE = {}\n\n    GL_STATE_NAMES.forEach(function (prop) {\n      var param = propName(prop)\n\n      function parseParam (parseStatic, parseDynamic) {\n        if (prop in staticOptions) {\n          var value = parseStatic(staticOptions[prop])\n          STATE[param] = createStaticDecl(function () {\n            return value\n          })\n        } else if (prop in dynamicOptions) {\n          var dyn = dynamicOptions[prop]\n          STATE[param] = createDynamicDecl(dyn, function (env, scope) {\n            return parseDynamic(env, scope, env.invoke(scope, dyn))\n          })\n        }\n      }\n\n      switch (prop) {\n        case S_CULL_ENABLE:\n        case S_BLEND_ENABLE:\n        case S_DITHER:\n        case S_STENCIL_ENABLE:\n        case S_DEPTH_ENABLE:\n        case S_SCISSOR_ENABLE:\n        case S_POLYGON_OFFSET_ENABLE:\n        case S_SAMPLE_ALPHA:\n        case S_SAMPLE_ENABLE:\n        case S_DEPTH_MASK:\n          return parseParam(\n            function (value) {\n              check$1.commandType(value, 'boolean', prop, env.commandStr)\n              return value\n            },\n            function (env, scope, value) {\n              check$1.optional(function () {\n                env.assert(scope,\n                  'typeof ' + value + '===\"boolean\"',\n                  'invalid flag ' + prop, env.commandStr)\n              })\n              return value\n            })\n\n        case S_DEPTH_FUNC:\n          return parseParam(\n            function (value) {\n              check$1.commandParameter(value, compareFuncs, 'invalid ' + prop, env.commandStr)\n              return compareFuncs[value]\n            },\n            function (env, scope, value) {\n              var COMPARE_FUNCS = env.constants.compareFuncs\n              check$1.optional(function () {\n                env.assert(scope,\n                  value + ' in ' + COMPARE_FUNCS,\n                  'invalid ' + prop + ', must be one of ' + Object.keys(compareFuncs))\n              })\n              return scope.def(COMPARE_FUNCS, '[', value, ']')\n            })\n\n        case S_DEPTH_RANGE:\n          return parseParam(\n            function (value) {\n              check$1.command(\n                isArrayLike(value) &&\n                value.length === 2 &&\n                typeof value[0] === 'number' &&\n                typeof value[1] === 'number' &&\n                value[0] <= value[1],\n                'depth range is 2d array',\n                env.commandStr)\n              return value\n            },\n            function (env, scope, value) {\n              check$1.optional(function () {\n                env.assert(scope,\n                  env.shared.isArrayLike + '(' + value + ')&&' +\n                  value + '.length===2&&' +\n                  'typeof ' + value + '[0]===\"number\"&&' +\n                  'typeof ' + value + '[1]===\"number\"&&' +\n                  value + '[0]<=' + value + '[1]',\n                  'depth range must be a 2d array')\n              })\n\n              var Z_NEAR = scope.def('+', value, '[0]')\n              var Z_FAR = scope.def('+', value, '[1]')\n              return [Z_NEAR, Z_FAR]\n            })\n\n        case S_BLEND_FUNC:\n          return parseParam(\n            function (value) {\n              check$1.commandType(value, 'object', 'blend.func', env.commandStr)\n              var srcRGB = ('srcRGB' in value ? value.srcRGB : value.src)\n              var srcAlpha = ('srcAlpha' in value ? value.srcAlpha : value.src)\n              var dstRGB = ('dstRGB' in value ? value.dstRGB : value.dst)\n              var dstAlpha = ('dstAlpha' in value ? value.dstAlpha : value.dst)\n              check$1.commandParameter(srcRGB, blendFuncs, param + '.srcRGB', env.commandStr)\n              check$1.commandParameter(srcAlpha, blendFuncs, param + '.srcAlpha', env.commandStr)\n              check$1.commandParameter(dstRGB, blendFuncs, param + '.dstRGB', env.commandStr)\n              check$1.commandParameter(dstAlpha, blendFuncs, param + '.dstAlpha', env.commandStr)\n\n              check$1.command(\n                (invalidBlendCombinations.indexOf(srcRGB + ', ' + dstRGB) === -1),\n                'unallowed blending combination (srcRGB, dstRGB) = (' + srcRGB + ', ' + dstRGB + ')', env.commandStr)\n\n              return [\n                blendFuncs[srcRGB],\n                blendFuncs[dstRGB],\n                blendFuncs[srcAlpha],\n                blendFuncs[dstAlpha]\n              ]\n            },\n            function (env, scope, value) {\n              var BLEND_FUNCS = env.constants.blendFuncs\n\n              check$1.optional(function () {\n                env.assert(scope,\n                  value + '&&typeof ' + value + '===\"object\"',\n                  'invalid blend func, must be an object')\n              })\n\n              function read (prefix, suffix) {\n                var func = scope.def(\n                  '\"', prefix, suffix, '\" in ', value,\n                  '?', value, '.', prefix, suffix,\n                  ':', value, '.', prefix)\n\n                check$1.optional(function () {\n                  env.assert(scope,\n                    func + ' in ' + BLEND_FUNCS,\n                    'invalid ' + prop + '.' + prefix + suffix + ', must be one of ' + Object.keys(blendFuncs))\n                })\n\n                return func\n              }\n\n              var srcRGB = read('src', 'RGB')\n              var dstRGB = read('dst', 'RGB')\n\n              check$1.optional(function () {\n                var INVALID_BLEND_COMBINATIONS = env.constants.invalidBlendCombinations\n\n                env.assert(scope,\n                  INVALID_BLEND_COMBINATIONS +\n                           '.indexOf(' + srcRGB + '+\", \"+' + dstRGB + ') === -1 ',\n                  'unallowed blending combination for (srcRGB, dstRGB)'\n                )\n              })\n\n              var SRC_RGB = scope.def(BLEND_FUNCS, '[', srcRGB, ']')\n              var SRC_ALPHA = scope.def(BLEND_FUNCS, '[', read('src', 'Alpha'), ']')\n              var DST_RGB = scope.def(BLEND_FUNCS, '[', dstRGB, ']')\n              var DST_ALPHA = scope.def(BLEND_FUNCS, '[', read('dst', 'Alpha'), ']')\n\n              return [SRC_RGB, DST_RGB, SRC_ALPHA, DST_ALPHA]\n            })\n\n        case S_BLEND_EQUATION:\n          return parseParam(\n            function (value) {\n              if (typeof value === 'string') {\n                check$1.commandParameter(value, blendEquations, 'invalid ' + prop, env.commandStr)\n                return [\n                  blendEquations[value],\n                  blendEquations[value]\n                ]\n              } else if (typeof value === 'object') {\n                check$1.commandParameter(\n                  value.rgb, blendEquations, prop + '.rgb', env.commandStr)\n                check$1.commandParameter(\n                  value.alpha, blendEquations, prop + '.alpha', env.commandStr)\n                return [\n                  blendEquations[value.rgb],\n                  blendEquations[value.alpha]\n                ]\n              } else {\n                check$1.commandRaise('invalid blend.equation', env.commandStr)\n              }\n            },\n            function (env, scope, value) {\n              var BLEND_EQUATIONS = env.constants.blendEquations\n\n              var RGB = scope.def()\n              var ALPHA = scope.def()\n\n              var ifte = env.cond('typeof ', value, '===\"string\"')\n\n              check$1.optional(function () {\n                function checkProp (block, name, value) {\n                  env.assert(block,\n                    value + ' in ' + BLEND_EQUATIONS,\n                    'invalid ' + name + ', must be one of ' + Object.keys(blendEquations))\n                }\n                checkProp(ifte.then, prop, value)\n\n                env.assert(ifte.else,\n                  value + '&&typeof ' + value + '===\"object\"',\n                  'invalid ' + prop)\n                checkProp(ifte.else, prop + '.rgb', value + '.rgb')\n                checkProp(ifte.else, prop + '.alpha', value + '.alpha')\n              })\n\n              ifte.then(\n                RGB, '=', ALPHA, '=', BLEND_EQUATIONS, '[', value, '];')\n              ifte.else(\n                RGB, '=', BLEND_EQUATIONS, '[', value, '.rgb];',\n                ALPHA, '=', BLEND_EQUATIONS, '[', value, '.alpha];')\n\n              scope(ifte)\n\n              return [RGB, ALPHA]\n            })\n\n        case S_BLEND_COLOR:\n          return parseParam(\n            function (value) {\n              check$1.command(\n                isArrayLike(value) &&\n                value.length === 4,\n                'blend.color must be a 4d array', env.commandStr)\n              return loop(4, function (i) {\n                return +value[i]\n              })\n            },\n            function (env, scope, value) {\n              check$1.optional(function () {\n                env.assert(scope,\n                  env.shared.isArrayLike + '(' + value + ')&&' +\n                  value + '.length===4',\n                  'blend.color must be a 4d array')\n              })\n              return loop(4, function (i) {\n                return scope.def('+', value, '[', i, ']')\n              })\n            })\n\n        case S_STENCIL_MASK:\n          return parseParam(\n            function (value) {\n              check$1.commandType(value, 'number', param, env.commandStr)\n              return value | 0\n            },\n            function (env, scope, value) {\n              check$1.optional(function () {\n                env.assert(scope,\n                  'typeof ' + value + '===\"number\"',\n                  'invalid stencil.mask')\n              })\n              return scope.def(value, '|0')\n            })\n\n        case S_STENCIL_FUNC:\n          return parseParam(\n            function (value) {\n              check$1.commandType(value, 'object', param, env.commandStr)\n              var cmp = value.cmp || 'keep'\n              var ref = value.ref || 0\n              var mask = 'mask' in value ? value.mask : -1\n              check$1.commandParameter(cmp, compareFuncs, prop + '.cmp', env.commandStr)\n              check$1.commandType(ref, 'number', prop + '.ref', env.commandStr)\n              check$1.commandType(mask, 'number', prop + '.mask', env.commandStr)\n              return [\n                compareFuncs[cmp],\n                ref,\n                mask\n              ]\n            },\n            function (env, scope, value) {\n              var COMPARE_FUNCS = env.constants.compareFuncs\n              check$1.optional(function () {\n                function assert () {\n                  env.assert(scope,\n                    Array.prototype.join.call(arguments, ''),\n                    'invalid stencil.func')\n                }\n                assert(value + '&&typeof ', value, '===\"object\"')\n                assert('!(\"cmp\" in ', value, ')||(',\n                  value, '.cmp in ', COMPARE_FUNCS, ')')\n              })\n              var cmp = scope.def(\n                '\"cmp\" in ', value,\n                '?', COMPARE_FUNCS, '[', value, '.cmp]',\n                ':', GL_KEEP)\n              var ref = scope.def(value, '.ref|0')\n              var mask = scope.def(\n                '\"mask\" in ', value,\n                '?', value, '.mask|0:-1')\n              return [cmp, ref, mask]\n            })\n\n        case S_STENCIL_OPFRONT:\n        case S_STENCIL_OPBACK:\n          return parseParam(\n            function (value) {\n              check$1.commandType(value, 'object', param, env.commandStr)\n              var fail = value.fail || 'keep'\n              var zfail = value.zfail || 'keep'\n              var zpass = value.zpass || 'keep'\n              check$1.commandParameter(fail, stencilOps, prop + '.fail', env.commandStr)\n              check$1.commandParameter(zfail, stencilOps, prop + '.zfail', env.commandStr)\n              check$1.commandParameter(zpass, stencilOps, prop + '.zpass', env.commandStr)\n              return [\n                prop === S_STENCIL_OPBACK ? GL_BACK : GL_FRONT,\n                stencilOps[fail],\n                stencilOps[zfail],\n                stencilOps[zpass]\n              ]\n            },\n            function (env, scope, value) {\n              var STENCIL_OPS = env.constants.stencilOps\n\n              check$1.optional(function () {\n                env.assert(scope,\n                  value + '&&typeof ' + value + '===\"object\"',\n                  'invalid ' + prop)\n              })\n\n              function read (name) {\n                check$1.optional(function () {\n                  env.assert(scope,\n                    '!(\"' + name + '\" in ' + value + ')||' +\n                    '(' + value + '.' + name + ' in ' + STENCIL_OPS + ')',\n                    'invalid ' + prop + '.' + name + ', must be one of ' + Object.keys(stencilOps))\n                })\n\n                return scope.def(\n                  '\"', name, '\" in ', value,\n                  '?', STENCIL_OPS, '[', value, '.', name, ']:',\n                  GL_KEEP)\n              }\n\n              return [\n                prop === S_STENCIL_OPBACK ? GL_BACK : GL_FRONT,\n                read('fail'),\n                read('zfail'),\n                read('zpass')\n              ]\n            })\n\n        case S_POLYGON_OFFSET_OFFSET:\n          return parseParam(\n            function (value) {\n              check$1.commandType(value, 'object', param, env.commandStr)\n              var factor = value.factor | 0\n              var units = value.units | 0\n              check$1.commandType(factor, 'number', param + '.factor', env.commandStr)\n              check$1.commandType(units, 'number', param + '.units', env.commandStr)\n              return [factor, units]\n            },\n            function (env, scope, value) {\n              check$1.optional(function () {\n                env.assert(scope,\n                  value + '&&typeof ' + value + '===\"object\"',\n                  'invalid ' + prop)\n              })\n\n              var FACTOR = scope.def(value, '.factor|0')\n              var UNITS = scope.def(value, '.units|0')\n\n              return [FACTOR, UNITS]\n            })\n\n        case S_CULL_FACE:\n          return parseParam(\n            function (value) {\n              var face = 0\n              if (value === 'front') {\n                face = GL_FRONT\n              } else if (value === 'back') {\n                face = GL_BACK\n              }\n              check$1.command(!!face, param, env.commandStr)\n              return face\n            },\n            function (env, scope, value) {\n              check$1.optional(function () {\n                env.assert(scope,\n                  value + '===\"front\"||' +\n                  value + '===\"back\"',\n                  'invalid cull.face')\n              })\n              return scope.def(value, '===\"front\"?', GL_FRONT, ':', GL_BACK)\n            })\n\n        case S_LINE_WIDTH:\n          return parseParam(\n            function (value) {\n              check$1.command(\n                typeof value === 'number' &&\n                value >= limits.lineWidthDims[0] &&\n                value <= limits.lineWidthDims[1],\n                'invalid line width, must be a positive number between ' +\n                limits.lineWidthDims[0] + ' and ' + limits.lineWidthDims[1], env.commandStr)\n              return value\n            },\n            function (env, scope, value) {\n              check$1.optional(function () {\n                env.assert(scope,\n                  'typeof ' + value + '===\"number\"&&' +\n                  value + '>=' + limits.lineWidthDims[0] + '&&' +\n                  value + '<=' + limits.lineWidthDims[1],\n                  'invalid line width')\n              })\n\n              return value\n            })\n\n        case S_FRONT_FACE:\n          return parseParam(\n            function (value) {\n              check$1.commandParameter(value, orientationType, param, env.commandStr)\n              return orientationType[value]\n            },\n            function (env, scope, value) {\n              check$1.optional(function () {\n                env.assert(scope,\n                  value + '===\"cw\"||' +\n                  value + '===\"ccw\"',\n                  'invalid frontFace, must be one of cw,ccw')\n              })\n              return scope.def(value + '===\"cw\"?' + GL_CW + ':' + GL_CCW)\n            })\n\n        case S_COLOR_MASK:\n          return parseParam(\n            function (value) {\n              check$1.command(\n                isArrayLike(value) && value.length === 4,\n                'color.mask must be length 4 array', env.commandStr)\n              return value.map(function (v) { return !!v })\n            },\n            function (env, scope, value) {\n              check$1.optional(function () {\n                env.assert(scope,\n                  env.shared.isArrayLike + '(' + value + ')&&' +\n                  value + '.length===4',\n                  'invalid color.mask')\n              })\n              return loop(4, function (i) {\n                return '!!' + value + '[' + i + ']'\n              })\n            })\n\n        case S_SAMPLE_COVERAGE:\n          return parseParam(\n            function (value) {\n              check$1.command(typeof value === 'object' && value, param, env.commandStr)\n              var sampleValue = 'value' in value ? value.value : 1\n              var sampleInvert = !!value.invert\n              check$1.command(\n                typeof sampleValue === 'number' &&\n                sampleValue >= 0 && sampleValue <= 1,\n                'sample.coverage.value must be a number between 0 and 1', env.commandStr)\n              return [sampleValue, sampleInvert]\n            },\n            function (env, scope, value) {\n              check$1.optional(function () {\n                env.assert(scope,\n                  value + '&&typeof ' + value + '===\"object\"',\n                  'invalid sample.coverage')\n              })\n              var VALUE = scope.def(\n                '\"value\" in ', value, '?+', value, '.value:1')\n              var INVERT = scope.def('!!', value, '.invert')\n              return [VALUE, INVERT]\n            })\n      }\n    })\n\n    return STATE\n  }\n\n  function parseUniforms (uniforms, env) {\n    var staticUniforms = uniforms.static\n    var dynamicUniforms = uniforms.dynamic\n\n    var UNIFORMS = {}\n\n    Object.keys(staticUniforms).forEach(function (name) {\n      var value = staticUniforms[name]\n      var result\n      if (typeof value === 'number' ||\n          typeof value === 'boolean') {\n        result = createStaticDecl(function () {\n          return value\n        })\n      } else if (typeof value === 'function') {\n        var reglType = value._reglType\n        if (reglType === 'texture2d' ||\n            reglType === 'textureCube') {\n          result = createStaticDecl(function (env) {\n            return env.link(value)\n          })\n        } else if (reglType === 'framebuffer' ||\n                   reglType === 'framebufferCube') {\n          check$1.command(value.color.length > 0,\n            'missing color attachment for framebuffer sent to uniform \"' + name + '\"', env.commandStr)\n          result = createStaticDecl(function (env) {\n            return env.link(value.color[0])\n          })\n        } else {\n          check$1.commandRaise('invalid data for uniform \"' + name + '\"', env.commandStr)\n        }\n      } else if (isArrayLike(value)) {\n        result = createStaticDecl(function (env) {\n          var ITEM = env.global.def('[',\n            loop(value.length, function (i) {\n              check$1.command(\n                typeof value[i] === 'number' ||\n                typeof value[i] === 'boolean',\n                'invalid uniform ' + name, env.commandStr)\n              return value[i]\n            }), ']')\n          return ITEM\n        })\n      } else {\n        check$1.commandRaise('invalid or missing data for uniform \"' + name + '\"', env.commandStr)\n      }\n      result.value = value\n      UNIFORMS[name] = result\n    })\n\n    Object.keys(dynamicUniforms).forEach(function (key) {\n      var dyn = dynamicUniforms[key]\n      UNIFORMS[key] = createDynamicDecl(dyn, function (env, scope) {\n        return env.invoke(scope, dyn)\n      })\n    })\n\n    return UNIFORMS\n  }\n\n  function parseAttributes (attributes, env) {\n    var staticAttributes = attributes.static\n    var dynamicAttributes = attributes.dynamic\n\n    var attributeDefs = {}\n\n    Object.keys(staticAttributes).forEach(function (attribute) {\n      var value = staticAttributes[attribute]\n      var id = stringStore.id(attribute)\n\n      var record = new AttributeRecord()\n      if (isBufferArgs(value)) {\n        record.state = ATTRIB_STATE_POINTER\n        record.buffer = bufferState.getBuffer(\n          bufferState.create(value, GL_ARRAY_BUFFER$2, false, true))\n        record.type = 0\n      } else {\n        var buffer = bufferState.getBuffer(value)\n        if (buffer) {\n          record.state = ATTRIB_STATE_POINTER\n          record.buffer = buffer\n          record.type = 0\n        } else {\n          check$1.command(typeof value === 'object' && value,\n            'invalid data for attribute ' + attribute, env.commandStr)\n          if ('constant' in value) {\n            var constant = value.constant\n            record.buffer = 'null'\n            record.state = ATTRIB_STATE_CONSTANT\n            if (typeof constant === 'number') {\n              record.x = constant\n            } else {\n              check$1.command(\n                isArrayLike(constant) &&\n                constant.length > 0 &&\n                constant.length <= 4,\n                'invalid constant for attribute ' + attribute, env.commandStr)\n              CUTE_COMPONENTS.forEach(function (c, i) {\n                if (i < constant.length) {\n                  record[c] = constant[i]\n                }\n              })\n            }\n          } else {\n            if (isBufferArgs(value.buffer)) {\n              buffer = bufferState.getBuffer(\n                bufferState.create(value.buffer, GL_ARRAY_BUFFER$2, false, true))\n            } else {\n              buffer = bufferState.getBuffer(value.buffer)\n            }\n            check$1.command(!!buffer, 'missing buffer for attribute \"' + attribute + '\"', env.commandStr)\n\n            var offset = value.offset | 0\n            check$1.command(offset >= 0,\n              'invalid offset for attribute \"' + attribute + '\"', env.commandStr)\n\n            var stride = value.stride | 0\n            check$1.command(stride >= 0 && stride < 256,\n              'invalid stride for attribute \"' + attribute + '\", must be integer betweeen [0, 255]', env.commandStr)\n\n            var size = value.size | 0\n            check$1.command(!('size' in value) || (size > 0 && size <= 4),\n              'invalid size for attribute \"' + attribute + '\", must be 1,2,3,4', env.commandStr)\n\n            var normalized = !!value.normalized\n\n            var type = 0\n            if ('type' in value) {\n              check$1.commandParameter(\n                value.type, glTypes,\n                'invalid type for attribute ' + attribute, env.commandStr)\n              type = glTypes[value.type]\n            }\n\n            var divisor = value.divisor | 0\n            if ('divisor' in value) {\n              check$1.command(divisor === 0 || extInstancing,\n                'cannot specify divisor for attribute \"' + attribute + '\", instancing not supported', env.commandStr)\n              check$1.command(divisor >= 0,\n                'invalid divisor for attribute \"' + attribute + '\"', env.commandStr)\n            }\n\n            check$1.optional(function () {\n              var command = env.commandStr\n\n              var VALID_KEYS = [\n                'buffer',\n                'offset',\n                'divisor',\n                'normalized',\n                'type',\n                'size',\n                'stride'\n              ]\n\n              Object.keys(value).forEach(function (prop) {\n                check$1.command(\n                  VALID_KEYS.indexOf(prop) >= 0,\n                  'unknown parameter \"' + prop + '\" for attribute pointer \"' + attribute + '\" (valid parameters are ' + VALID_KEYS + ')',\n                  command)\n              })\n            })\n\n            record.buffer = buffer\n            record.state = ATTRIB_STATE_POINTER\n            record.size = size\n            record.normalized = normalized\n            record.type = type || buffer.dtype\n            record.offset = offset\n            record.stride = stride\n            record.divisor = divisor\n          }\n        }\n      }\n\n      attributeDefs[attribute] = createStaticDecl(function (env, scope) {\n        var cache = env.attribCache\n        if (id in cache) {\n          return cache[id]\n        }\n        var result = {\n          isStream: false\n        }\n        Object.keys(record).forEach(function (key) {\n          result[key] = record[key]\n        })\n        if (record.buffer) {\n          result.buffer = env.link(record.buffer)\n          result.type = result.type || (result.buffer + '.dtype')\n        }\n        cache[id] = result\n        return result\n      })\n    })\n\n    Object.keys(dynamicAttributes).forEach(function (attribute) {\n      var dyn = dynamicAttributes[attribute]\n\n      function appendAttributeCode (env, block) {\n        var VALUE = env.invoke(block, dyn)\n\n        var shared = env.shared\n        var constants = env.constants\n\n        var IS_BUFFER_ARGS = shared.isBufferArgs\n        var BUFFER_STATE = shared.buffer\n\n        // Perform validation on attribute\n        check$1.optional(function () {\n          env.assert(block,\n            VALUE + '&&(typeof ' + VALUE + '===\"object\"||typeof ' +\n            VALUE + '===\"function\")&&(' +\n            IS_BUFFER_ARGS + '(' + VALUE + ')||' +\n            BUFFER_STATE + '.getBuffer(' + VALUE + ')||' +\n            BUFFER_STATE + '.getBuffer(' + VALUE + '.buffer)||' +\n            IS_BUFFER_ARGS + '(' + VALUE + '.buffer)||' +\n            '(\"constant\" in ' + VALUE +\n            '&&(typeof ' + VALUE + '.constant===\"number\"||' +\n            shared.isArrayLike + '(' + VALUE + '.constant))))',\n            'invalid dynamic attribute \"' + attribute + '\"')\n        })\n\n        // allocate names for result\n        var result = {\n          isStream: block.def(false)\n        }\n        var defaultRecord = new AttributeRecord()\n        defaultRecord.state = ATTRIB_STATE_POINTER\n        Object.keys(defaultRecord).forEach(function (key) {\n          result[key] = block.def('' + defaultRecord[key])\n        })\n\n        var BUFFER = result.buffer\n        var TYPE = result.type\n        block(\n          'if(', IS_BUFFER_ARGS, '(', VALUE, ')){',\n          result.isStream, '=true;',\n          BUFFER, '=', BUFFER_STATE, '.createStream(', GL_ARRAY_BUFFER$2, ',', VALUE, ');',\n          TYPE, '=', BUFFER, '.dtype;',\n          '}else{',\n          BUFFER, '=', BUFFER_STATE, '.getBuffer(', VALUE, ');',\n          'if(', BUFFER, '){',\n          TYPE, '=', BUFFER, '.dtype;',\n          '}else if(\"constant\" in ', VALUE, '){',\n          result.state, '=', ATTRIB_STATE_CONSTANT, ';',\n          'if(typeof ' + VALUE + '.constant === \"number\"){',\n          result[CUTE_COMPONENTS[0]], '=', VALUE, '.constant;',\n          CUTE_COMPONENTS.slice(1).map(function (n) {\n            return result[n]\n          }).join('='), '=0;',\n          '}else{',\n          CUTE_COMPONENTS.map(function (name, i) {\n            return (\n              result[name] + '=' + VALUE + '.constant.length>' + i +\n              '?' + VALUE + '.constant[' + i + ']:0;'\n            )\n          }).join(''),\n          '}}else{',\n          'if(', IS_BUFFER_ARGS, '(', VALUE, '.buffer)){',\n          BUFFER, '=', BUFFER_STATE, '.createStream(', GL_ARRAY_BUFFER$2, ',', VALUE, '.buffer);',\n          '}else{',\n          BUFFER, '=', BUFFER_STATE, '.getBuffer(', VALUE, '.buffer);',\n          '}',\n          TYPE, '=\"type\" in ', VALUE, '?',\n          constants.glTypes, '[', VALUE, '.type]:', BUFFER, '.dtype;',\n          result.normalized, '=!!', VALUE, '.normalized;')\n        function emitReadRecord (name) {\n          block(result[name], '=', VALUE, '.', name, '|0;')\n        }\n        emitReadRecord('size')\n        emitReadRecord('offset')\n        emitReadRecord('stride')\n        emitReadRecord('divisor')\n\n        block('}}')\n\n        block.exit(\n          'if(', result.isStream, '){',\n          BUFFER_STATE, '.destroyStream(', BUFFER, ');',\n          '}')\n\n        return result\n      }\n\n      attributeDefs[attribute] = createDynamicDecl(dyn, appendAttributeCode)\n    })\n\n    return attributeDefs\n  }\n\n  function parseVAO (options, env) {\n    var staticOptions = options.static\n    var dynamicOptions = options.dynamic\n    if (S_VAO in staticOptions) {\n      var vao = staticOptions[S_VAO]\n      if (vao !== null && attributeState.getVAO(vao) === null) {\n        vao = attributeState.createVAO(vao)\n      }\n      return createStaticDecl(function (env) {\n        return env.link(attributeState.getVAO(vao))\n      })\n    } else if (S_VAO in dynamicOptions) {\n      var dyn = dynamicOptions[S_VAO]\n      return createDynamicDecl(dyn, function (env, scope) {\n        var vaoRef = env.invoke(scope, dyn)\n        return scope.def(env.shared.vao + '.getVAO(' + vaoRef + ')')\n      })\n    }\n    return null\n  }\n\n  function parseContext (context) {\n    var staticContext = context.static\n    var dynamicContext = context.dynamic\n    var result = {}\n\n    Object.keys(staticContext).forEach(function (name) {\n      var value = staticContext[name]\n      result[name] = createStaticDecl(function (env, scope) {\n        if (typeof value === 'number' || typeof value === 'boolean') {\n          return '' + value\n        } else {\n          return env.link(value)\n        }\n      })\n    })\n\n    Object.keys(dynamicContext).forEach(function (name) {\n      var dyn = dynamicContext[name]\n      result[name] = createDynamicDecl(dyn, function (env, scope) {\n        return env.invoke(scope, dyn)\n      })\n    })\n\n    return result\n  }\n\n  function parseArguments (options, attributes, uniforms, context, env) {\n    var staticOptions = options.static\n    var dynamicOptions = options.dynamic\n\n    check$1.optional(function () {\n      var KEY_NAMES = [\n        S_FRAMEBUFFER,\n        S_VERT,\n        S_FRAG,\n        S_ELEMENTS,\n        S_PRIMITIVE,\n        S_OFFSET,\n        S_COUNT,\n        S_INSTANCES,\n        S_PROFILE,\n        S_VAO\n      ].concat(GL_STATE_NAMES)\n\n      function checkKeys (dict) {\n        Object.keys(dict).forEach(function (key) {\n          check$1.command(\n            KEY_NAMES.indexOf(key) >= 0,\n            'unknown parameter \"' + key + '\"',\n            env.commandStr)\n        })\n      }\n\n      checkKeys(staticOptions)\n      checkKeys(dynamicOptions)\n    })\n\n    var attribLocations = parseAttribLocations(options, attributes)\n\n    var framebuffer = parseFramebuffer(options, env)\n    var viewportAndScissor = parseViewportScissor(options, framebuffer, env)\n    var draw = parseDraw(options, env)\n    var state = parseGLState(options, env)\n    var shader = parseProgram(options, env, attribLocations)\n\n    function copyBox (name) {\n      var defn = viewportAndScissor[name]\n      if (defn) {\n        state[name] = defn\n      }\n    }\n    copyBox(S_VIEWPORT)\n    copyBox(propName(S_SCISSOR_BOX))\n\n    var dirty = Object.keys(state).length > 0\n\n    var result = {\n      framebuffer: framebuffer,\n      draw: draw,\n      shader: shader,\n      state: state,\n      dirty: dirty,\n      scopeVAO: null,\n      drawVAO: null,\n      useVAO: false,\n      attributes: {}\n    }\n\n    result.profile = parseProfile(options, env)\n    result.uniforms = parseUniforms(uniforms, env)\n    result.drawVAO = result.scopeVAO = parseVAO(options, env)\n    // special case: check if we can statically allocate a vertex array object for this program\n    if (!result.drawVAO && shader.program && !attribLocations && extensions.angle_instanced_arrays) {\n      var useVAO = true\n      var staticBindings = shader.program.attributes.map(function (attr) {\n        var binding = attributes.static[attr]\n        useVAO = useVAO && !!binding\n        return binding\n      })\n      if (useVAO && staticBindings.length > 0) {\n        var vao = attributeState.getVAO(attributeState.createVAO(staticBindings))\n        result.drawVAO = new Declaration(null, null, null, function (env, scope) {\n          return env.link(vao)\n        })\n        result.useVAO = true\n      }\n    }\n    if (attribLocations) {\n      result.useVAO = true\n    } else {\n      result.attributes = parseAttributes(attributes, env)\n    }\n    result.context = parseContext(context, env)\n    return result\n  }\n\n  // ===================================================\n  // ===================================================\n  // COMMON UPDATE FUNCTIONS\n  // ===================================================\n  // ===================================================\n  function emitContext (env, scope, context) {\n    var shared = env.shared\n    var CONTEXT = shared.context\n\n    var contextEnter = env.scope()\n\n    Object.keys(context).forEach(function (name) {\n      scope.save(CONTEXT, '.' + name)\n      var defn = context[name]\n      var value = defn.append(env, scope)\n      if (Array.isArray(value)) {\n        contextEnter(CONTEXT, '.', name, '=[', value.join(), '];')\n      } else {\n        contextEnter(CONTEXT, '.', name, '=', value, ';')\n      }\n    })\n\n    scope(contextEnter)\n  }\n\n  // ===================================================\n  // ===================================================\n  // COMMON DRAWING FUNCTIONS\n  // ===================================================\n  // ===================================================\n  function emitPollFramebuffer (env, scope, framebuffer, skipCheck) {\n    var shared = env.shared\n\n    var GL = shared.gl\n    var FRAMEBUFFER_STATE = shared.framebuffer\n    var EXT_DRAW_BUFFERS\n    if (extDrawBuffers) {\n      EXT_DRAW_BUFFERS = scope.def(shared.extensions, '.webgl_draw_buffers')\n    }\n\n    var constants = env.constants\n\n    var DRAW_BUFFERS = constants.drawBuffer\n    var BACK_BUFFER = constants.backBuffer\n\n    var NEXT\n    if (framebuffer) {\n      NEXT = framebuffer.append(env, scope)\n    } else {\n      NEXT = scope.def(FRAMEBUFFER_STATE, '.next')\n    }\n\n    if (!skipCheck) {\n      scope('if(', NEXT, '!==', FRAMEBUFFER_STATE, '.cur){')\n    }\n    scope(\n      'if(', NEXT, '){',\n      GL, '.bindFramebuffer(', GL_FRAMEBUFFER$2, ',', NEXT, '.framebuffer);')\n    if (extDrawBuffers) {\n      scope(EXT_DRAW_BUFFERS, '.drawBuffersWEBGL(',\n        DRAW_BUFFERS, '[', NEXT, '.colorAttachments.length]);')\n    }\n    scope('}else{',\n      GL, '.bindFramebuffer(', GL_FRAMEBUFFER$2, ',null);')\n    if (extDrawBuffers) {\n      scope(EXT_DRAW_BUFFERS, '.drawBuffersWEBGL(', BACK_BUFFER, ');')\n    }\n    scope(\n      '}',\n      FRAMEBUFFER_STATE, '.cur=', NEXT, ';')\n    if (!skipCheck) {\n      scope('}')\n    }\n  }\n\n  function emitPollState (env, scope, args) {\n    var shared = env.shared\n\n    var GL = shared.gl\n\n    var CURRENT_VARS = env.current\n    var NEXT_VARS = env.next\n    var CURRENT_STATE = shared.current\n    var NEXT_STATE = shared.next\n\n    var block = env.cond(CURRENT_STATE, '.dirty')\n\n    GL_STATE_NAMES.forEach(function (prop) {\n      var param = propName(prop)\n      if (param in args.state) {\n        return\n      }\n\n      var NEXT, CURRENT\n      if (param in NEXT_VARS) {\n        NEXT = NEXT_VARS[param]\n        CURRENT = CURRENT_VARS[param]\n        var parts = loop(currentState[param].length, function (i) {\n          return block.def(NEXT, '[', i, ']')\n        })\n        block(env.cond(parts.map(function (p, i) {\n          return p + '!==' + CURRENT + '[' + i + ']'\n        }).join('||'))\n          .then(\n            GL, '.', GL_VARIABLES[param], '(', parts, ');',\n            parts.map(function (p, i) {\n              return CURRENT + '[' + i + ']=' + p\n            }).join(';'), ';'))\n      } else {\n        NEXT = block.def(NEXT_STATE, '.', param)\n        var ifte = env.cond(NEXT, '!==', CURRENT_STATE, '.', param)\n        block(ifte)\n        if (param in GL_FLAGS) {\n          ifte(\n            env.cond(NEXT)\n              .then(GL, '.enable(', GL_FLAGS[param], ');')\n              .else(GL, '.disable(', GL_FLAGS[param], ');'),\n            CURRENT_STATE, '.', param, '=', NEXT, ';')\n        } else {\n          ifte(\n            GL, '.', GL_VARIABLES[param], '(', NEXT, ');',\n            CURRENT_STATE, '.', param, '=', NEXT, ';')\n        }\n      }\n    })\n    if (Object.keys(args.state).length === 0) {\n      block(CURRENT_STATE, '.dirty=false;')\n    }\n    scope(block)\n  }\n\n  function emitSetOptions (env, scope, options, filter) {\n    var shared = env.shared\n    var CURRENT_VARS = env.current\n    var CURRENT_STATE = shared.current\n    var GL = shared.gl\n    sortState(Object.keys(options)).forEach(function (param) {\n      var defn = options[param]\n      if (filter && !filter(defn)) {\n        return\n      }\n      var variable = defn.append(env, scope)\n      if (GL_FLAGS[param]) {\n        var flag = GL_FLAGS[param]\n        if (isStatic(defn)) {\n          if (variable) {\n            scope(GL, '.enable(', flag, ');')\n          } else {\n            scope(GL, '.disable(', flag, ');')\n          }\n        } else {\n          scope(env.cond(variable)\n            .then(GL, '.enable(', flag, ');')\n            .else(GL, '.disable(', flag, ');'))\n        }\n        scope(CURRENT_STATE, '.', param, '=', variable, ';')\n      } else if (isArrayLike(variable)) {\n        var CURRENT = CURRENT_VARS[param]\n        scope(\n          GL, '.', GL_VARIABLES[param], '(', variable, ');',\n          variable.map(function (v, i) {\n            return CURRENT + '[' + i + ']=' + v\n          }).join(';'), ';')\n      } else {\n        scope(\n          GL, '.', GL_VARIABLES[param], '(', variable, ');',\n          CURRENT_STATE, '.', param, '=', variable, ';')\n      }\n    })\n  }\n\n  function injectExtensions (env, scope) {\n    if (extInstancing) {\n      env.instancing = scope.def(\n        env.shared.extensions, '.angle_instanced_arrays')\n    }\n  }\n\n  function emitProfile (env, scope, args, useScope, incrementCounter) {\n    var shared = env.shared\n    var STATS = env.stats\n    var CURRENT_STATE = shared.current\n    var TIMER = shared.timer\n    var profileArg = args.profile\n\n    function perfCounter () {\n      if (typeof performance === 'undefined') {\n        return 'Date.now()'\n      } else {\n        return 'performance.now()'\n      }\n    }\n\n    var CPU_START, QUERY_COUNTER\n    function emitProfileStart (block) {\n      CPU_START = scope.def()\n      block(CPU_START, '=', perfCounter(), ';')\n      if (typeof incrementCounter === 'string') {\n        block(STATS, '.count+=', incrementCounter, ';')\n      } else {\n        block(STATS, '.count++;')\n      }\n      if (timer) {\n        if (useScope) {\n          QUERY_COUNTER = scope.def()\n          block(QUERY_COUNTER, '=', TIMER, '.getNumPendingQueries();')\n        } else {\n          block(TIMER, '.beginQuery(', STATS, ');')\n        }\n      }\n    }\n\n    function emitProfileEnd (block) {\n      block(STATS, '.cpuTime+=', perfCounter(), '-', CPU_START, ';')\n      if (timer) {\n        if (useScope) {\n          block(TIMER, '.pushScopeStats(',\n            QUERY_COUNTER, ',',\n            TIMER, '.getNumPendingQueries(),',\n            STATS, ');')\n        } else {\n          block(TIMER, '.endQuery();')\n        }\n      }\n    }\n\n    function scopeProfile (value) {\n      var prev = scope.def(CURRENT_STATE, '.profile')\n      scope(CURRENT_STATE, '.profile=', value, ';')\n      scope.exit(CURRENT_STATE, '.profile=', prev, ';')\n    }\n\n    var USE_PROFILE\n    if (profileArg) {\n      if (isStatic(profileArg)) {\n        if (profileArg.enable) {\n          emitProfileStart(scope)\n          emitProfileEnd(scope.exit)\n          scopeProfile('true')\n        } else {\n          scopeProfile('false')\n        }\n        return\n      }\n      USE_PROFILE = profileArg.append(env, scope)\n      scopeProfile(USE_PROFILE)\n    } else {\n      USE_PROFILE = scope.def(CURRENT_STATE, '.profile')\n    }\n\n    var start = env.block()\n    emitProfileStart(start)\n    scope('if(', USE_PROFILE, '){', start, '}')\n    var end = env.block()\n    emitProfileEnd(end)\n    scope.exit('if(', USE_PROFILE, '){', end, '}')\n  }\n\n  function emitAttributes (env, scope, args, attributes, filter) {\n    var shared = env.shared\n\n    function typeLength (x) {\n      switch (x) {\n        case GL_FLOAT_VEC2:\n        case GL_INT_VEC2:\n        case GL_BOOL_VEC2:\n          return 2\n        case GL_FLOAT_VEC3:\n        case GL_INT_VEC3:\n        case GL_BOOL_VEC3:\n          return 3\n        case GL_FLOAT_VEC4:\n        case GL_INT_VEC4:\n        case GL_BOOL_VEC4:\n          return 4\n        default:\n          return 1\n      }\n    }\n\n    function emitBindAttribute (ATTRIBUTE, size, record) {\n      var GL = shared.gl\n\n      var LOCATION = scope.def(ATTRIBUTE, '.location')\n      var BINDING = scope.def(shared.attributes, '[', LOCATION, ']')\n\n      var STATE = record.state\n      var BUFFER = record.buffer\n      var CONST_COMPONENTS = [\n        record.x,\n        record.y,\n        record.z,\n        record.w\n      ]\n\n      var COMMON_KEYS = [\n        'buffer',\n        'normalized',\n        'offset',\n        'stride'\n      ]\n\n      function emitBuffer () {\n        scope(\n          'if(!', BINDING, '.buffer){',\n          GL, '.enableVertexAttribArray(', LOCATION, ');}')\n\n        var TYPE = record.type\n        var SIZE\n        if (!record.size) {\n          SIZE = size\n        } else {\n          SIZE = scope.def(record.size, '||', size)\n        }\n\n        scope('if(',\n          BINDING, '.type!==', TYPE, '||',\n          BINDING, '.size!==', SIZE, '||',\n          COMMON_KEYS.map(function (key) {\n            return BINDING + '.' + key + '!==' + record[key]\n          }).join('||'),\n          '){',\n          GL, '.bindBuffer(', GL_ARRAY_BUFFER$2, ',', BUFFER, '.buffer);',\n          GL, '.vertexAttribPointer(', [\n            LOCATION,\n            SIZE,\n            TYPE,\n            record.normalized,\n            record.stride,\n            record.offset\n          ], ');',\n          BINDING, '.type=', TYPE, ';',\n          BINDING, '.size=', SIZE, ';',\n          COMMON_KEYS.map(function (key) {\n            return BINDING + '.' + key + '=' + record[key] + ';'\n          }).join(''),\n          '}')\n\n        if (extInstancing) {\n          var DIVISOR = record.divisor\n          scope(\n            'if(', BINDING, '.divisor!==', DIVISOR, '){',\n            env.instancing, '.vertexAttribDivisorANGLE(', [LOCATION, DIVISOR], ');',\n            BINDING, '.divisor=', DIVISOR, ';}')\n        }\n      }\n\n      function emitConstant () {\n        scope(\n          'if(', BINDING, '.buffer){',\n          GL, '.disableVertexAttribArray(', LOCATION, ');',\n          BINDING, '.buffer=null;',\n          '}if(', CUTE_COMPONENTS.map(function (c, i) {\n            return BINDING + '.' + c + '!==' + CONST_COMPONENTS[i]\n          }).join('||'), '){',\n          GL, '.vertexAttrib4f(', LOCATION, ',', CONST_COMPONENTS, ');',\n          CUTE_COMPONENTS.map(function (c, i) {\n            return BINDING + '.' + c + '=' + CONST_COMPONENTS[i] + ';'\n          }).join(''),\n          '}')\n      }\n\n      if (STATE === ATTRIB_STATE_POINTER) {\n        emitBuffer()\n      } else if (STATE === ATTRIB_STATE_CONSTANT) {\n        emitConstant()\n      } else {\n        scope('if(', STATE, '===', ATTRIB_STATE_POINTER, '){')\n        emitBuffer()\n        scope('}else{')\n        emitConstant()\n        scope('}')\n      }\n    }\n\n    attributes.forEach(function (attribute) {\n      var name = attribute.name\n      var arg = args.attributes[name]\n      var record\n      if (arg) {\n        if (!filter(arg)) {\n          return\n        }\n        record = arg.append(env, scope)\n      } else {\n        if (!filter(SCOPE_DECL)) {\n          return\n        }\n        var scopeAttrib = env.scopeAttrib(name)\n        check$1.optional(function () {\n          env.assert(scope,\n            scopeAttrib + '.state',\n            'missing attribute ' + name)\n        })\n        record = {}\n        Object.keys(new AttributeRecord()).forEach(function (key) {\n          record[key] = scope.def(scopeAttrib, '.', key)\n        })\n      }\n      emitBindAttribute(\n        env.link(attribute), typeLength(attribute.info.type), record)\n    })\n  }\n\n  function emitUniforms (env, scope, args, uniforms, filter) {\n    var shared = env.shared\n    var GL = shared.gl\n\n    var infix\n    for (var i = 0; i < uniforms.length; ++i) {\n      var uniform = uniforms[i]\n      var name = uniform.name\n      var type = uniform.info.type\n      var arg = args.uniforms[name]\n      var UNIFORM = env.link(uniform)\n      var LOCATION = UNIFORM + '.location'\n\n      var VALUE\n      if (arg) {\n        if (!filter(arg)) {\n          continue\n        }\n        if (isStatic(arg)) {\n          var value = arg.value\n          check$1.command(\n            value !== null && typeof value !== 'undefined',\n            'missing uniform \"' + name + '\"', env.commandStr)\n          if (type === GL_SAMPLER_2D || type === GL_SAMPLER_CUBE) {\n            check$1.command(\n              typeof value === 'function' &&\n              ((type === GL_SAMPLER_2D &&\n                (value._reglType === 'texture2d' ||\n                value._reglType === 'framebuffer')) ||\n              (type === GL_SAMPLER_CUBE &&\n                (value._reglType === 'textureCube' ||\n                value._reglType === 'framebufferCube'))),\n              'invalid texture for uniform ' + name, env.commandStr)\n            var TEX_VALUE = env.link(value._texture || value.color[0]._texture)\n            scope(GL, '.uniform1i(', LOCATION, ',', TEX_VALUE + '.bind());')\n            scope.exit(TEX_VALUE, '.unbind();')\n          } else if (\n            type === GL_FLOAT_MAT2 ||\n            type === GL_FLOAT_MAT3 ||\n            type === GL_FLOAT_MAT4) {\n            check$1.optional(function () {\n              check$1.command(isArrayLike(value),\n                'invalid matrix for uniform ' + name, env.commandStr)\n              check$1.command(\n                (type === GL_FLOAT_MAT2 && value.length === 4) ||\n                (type === GL_FLOAT_MAT3 && value.length === 9) ||\n                (type === GL_FLOAT_MAT4 && value.length === 16),\n                'invalid length for matrix uniform ' + name, env.commandStr)\n            })\n            var MAT_VALUE = env.global.def('new Float32Array([' +\n              Array.prototype.slice.call(value) + '])')\n            var dim = 2\n            if (type === GL_FLOAT_MAT3) {\n              dim = 3\n            } else if (type === GL_FLOAT_MAT4) {\n              dim = 4\n            }\n            scope(\n              GL, '.uniformMatrix', dim, 'fv(',\n              LOCATION, ',false,', MAT_VALUE, ');')\n          } else {\n            switch (type) {\n              case GL_FLOAT$8:\n                check$1.commandType(value, 'number', 'uniform ' + name, env.commandStr)\n                infix = '1f'\n                break\n              case GL_FLOAT_VEC2:\n                check$1.command(\n                  isArrayLike(value) && value.length === 2,\n                  'uniform ' + name, env.commandStr)\n                infix = '2f'\n                break\n              case GL_FLOAT_VEC3:\n                check$1.command(\n                  isArrayLike(value) && value.length === 3,\n                  'uniform ' + name, env.commandStr)\n                infix = '3f'\n                break\n              case GL_FLOAT_VEC4:\n                check$1.command(\n                  isArrayLike(value) && value.length === 4,\n                  'uniform ' + name, env.commandStr)\n                infix = '4f'\n                break\n              case GL_BOOL:\n                check$1.commandType(value, 'boolean', 'uniform ' + name, env.commandStr)\n                infix = '1i'\n                break\n              case GL_INT$3:\n                check$1.commandType(value, 'number', 'uniform ' + name, env.commandStr)\n                infix = '1i'\n                break\n              case GL_BOOL_VEC2:\n                check$1.command(\n                  isArrayLike(value) && value.length === 2,\n                  'uniform ' + name, env.commandStr)\n                infix = '2i'\n                break\n              case GL_INT_VEC2:\n                check$1.command(\n                  isArrayLike(value) && value.length === 2,\n                  'uniform ' + name, env.commandStr)\n                infix = '2i'\n                break\n              case GL_BOOL_VEC3:\n                check$1.command(\n                  isArrayLike(value) && value.length === 3,\n                  'uniform ' + name, env.commandStr)\n                infix = '3i'\n                break\n              case GL_INT_VEC3:\n                check$1.command(\n                  isArrayLike(value) && value.length === 3,\n                  'uniform ' + name, env.commandStr)\n                infix = '3i'\n                break\n              case GL_BOOL_VEC4:\n                check$1.command(\n                  isArrayLike(value) && value.length === 4,\n                  'uniform ' + name, env.commandStr)\n                infix = '4i'\n                break\n              case GL_INT_VEC4:\n                check$1.command(\n                  isArrayLike(value) && value.length === 4,\n                  'uniform ' + name, env.commandStr)\n                infix = '4i'\n                break\n            }\n            scope(GL, '.uniform', infix, '(', LOCATION, ',',\n              isArrayLike(value) ? Array.prototype.slice.call(value) : value,\n              ');')\n          }\n          continue\n        } else {\n          VALUE = arg.append(env, scope)\n        }\n      } else {\n        if (!filter(SCOPE_DECL)) {\n          continue\n        }\n        VALUE = scope.def(shared.uniforms, '[', stringStore.id(name), ']')\n      }\n\n      if (type === GL_SAMPLER_2D) {\n        check$1(!Array.isArray(VALUE), 'must specify a scalar prop for textures')\n        scope(\n          'if(', VALUE, '&&', VALUE, '._reglType===\"framebuffer\"){',\n          VALUE, '=', VALUE, '.color[0];',\n          '}')\n      } else if (type === GL_SAMPLER_CUBE) {\n        check$1(!Array.isArray(VALUE), 'must specify a scalar prop for cube maps')\n        scope(\n          'if(', VALUE, '&&', VALUE, '._reglType===\"framebufferCube\"){',\n          VALUE, '=', VALUE, '.color[0];',\n          '}')\n      }\n\n      // perform type validation\n      check$1.optional(function () {\n        function emitCheck (pred, message) {\n          env.assert(scope, pred,\n            'bad data or missing for uniform \"' + name + '\".  ' + message)\n        }\n\n        function checkType (type) {\n          check$1(!Array.isArray(VALUE), 'must not specify an array type for uniform')\n          emitCheck(\n            'typeof ' + VALUE + '===\"' + type + '\"',\n            'invalid type, expected ' + type)\n        }\n\n        function checkVector (n, type) {\n          if (Array.isArray(VALUE)) {\n            check$1(VALUE.length === n, 'must have length ' + n)\n          } else {\n            emitCheck(\n              shared.isArrayLike + '(' + VALUE + ')&&' + VALUE + '.length===' + n,\n              'invalid vector, should have length ' + n, env.commandStr)\n          }\n        }\n\n        function checkTexture (target) {\n          check$1(!Array.isArray(VALUE), 'must not specify a value type')\n          emitCheck(\n            'typeof ' + VALUE + '===\"function\"&&' +\n            VALUE + '._reglType===\"texture' +\n            (target === GL_TEXTURE_2D$3 ? '2d' : 'Cube') + '\"',\n            'invalid texture type', env.commandStr)\n        }\n\n        switch (type) {\n          case GL_INT$3:\n            checkType('number')\n            break\n          case GL_INT_VEC2:\n            checkVector(2, 'number')\n            break\n          case GL_INT_VEC3:\n            checkVector(3, 'number')\n            break\n          case GL_INT_VEC4:\n            checkVector(4, 'number')\n            break\n          case GL_FLOAT$8:\n            checkType('number')\n            break\n          case GL_FLOAT_VEC2:\n            checkVector(2, 'number')\n            break\n          case GL_FLOAT_VEC3:\n            checkVector(3, 'number')\n            break\n          case GL_FLOAT_VEC4:\n            checkVector(4, 'number')\n            break\n          case GL_BOOL:\n            checkType('boolean')\n            break\n          case GL_BOOL_VEC2:\n            checkVector(2, 'boolean')\n            break\n          case GL_BOOL_VEC3:\n            checkVector(3, 'boolean')\n            break\n          case GL_BOOL_VEC4:\n            checkVector(4, 'boolean')\n            break\n          case GL_FLOAT_MAT2:\n            checkVector(4, 'number')\n            break\n          case GL_FLOAT_MAT3:\n            checkVector(9, 'number')\n            break\n          case GL_FLOAT_MAT4:\n            checkVector(16, 'number')\n            break\n          case GL_SAMPLER_2D:\n            checkTexture(GL_TEXTURE_2D$3)\n            break\n          case GL_SAMPLER_CUBE:\n            checkTexture(GL_TEXTURE_CUBE_MAP$2)\n            break\n        }\n      })\n\n      var unroll = 1\n      switch (type) {\n        case GL_SAMPLER_2D:\n        case GL_SAMPLER_CUBE:\n          var TEX = scope.def(VALUE, '._texture')\n          scope(GL, '.uniform1i(', LOCATION, ',', TEX, '.bind());')\n          scope.exit(TEX, '.unbind();')\n          continue\n\n        case GL_INT$3:\n        case GL_BOOL:\n          infix = '1i'\n          break\n\n        case GL_INT_VEC2:\n        case GL_BOOL_VEC2:\n          infix = '2i'\n          unroll = 2\n          break\n\n        case GL_INT_VEC3:\n        case GL_BOOL_VEC3:\n          infix = '3i'\n          unroll = 3\n          break\n\n        case GL_INT_VEC4:\n        case GL_BOOL_VEC4:\n          infix = '4i'\n          unroll = 4\n          break\n\n        case GL_FLOAT$8:\n          infix = '1f'\n          break\n\n        case GL_FLOAT_VEC2:\n          infix = '2f'\n          unroll = 2\n          break\n\n        case GL_FLOAT_VEC3:\n          infix = '3f'\n          unroll = 3\n          break\n\n        case GL_FLOAT_VEC4:\n          infix = '4f'\n          unroll = 4\n          break\n\n        case GL_FLOAT_MAT2:\n          infix = 'Matrix2fv'\n          break\n\n        case GL_FLOAT_MAT3:\n          infix = 'Matrix3fv'\n          break\n\n        case GL_FLOAT_MAT4:\n          infix = 'Matrix4fv'\n          break\n      }\n\n      scope(GL, '.uniform', infix, '(', LOCATION, ',')\n      if (infix.charAt(0) === 'M') {\n        var matSize = Math.pow(type - GL_FLOAT_MAT2 + 2, 2)\n        var STORAGE = env.global.def('new Float32Array(', matSize, ')')\n        if (Array.isArray(VALUE)) {\n          scope(\n            'false,(',\n            loop(matSize, function (i) {\n              return STORAGE + '[' + i + ']=' + VALUE[i]\n            }), ',', STORAGE, ')')\n        } else {\n          scope(\n            'false,(Array.isArray(', VALUE, ')||', VALUE, ' instanceof Float32Array)?', VALUE, ':(',\n            loop(matSize, function (i) {\n              return STORAGE + '[' + i + ']=' + VALUE + '[' + i + ']'\n            }), ',', STORAGE, ')')\n        }\n      } else if (unroll > 1) {\n        scope(loop(unroll, function (i) {\n          return Array.isArray(VALUE) ? VALUE[i] : VALUE + '[' + i + ']'\n        }))\n      } else {\n        check$1(!Array.isArray(VALUE), 'uniform value must not be an array')\n        scope(VALUE)\n      }\n      scope(');')\n    }\n  }\n\n  function emitDraw (env, outer, inner, args) {\n    var shared = env.shared\n    var GL = shared.gl\n    var DRAW_STATE = shared.draw\n\n    var drawOptions = args.draw\n\n    function emitElements () {\n      var defn = drawOptions.elements\n      var ELEMENTS\n      var scope = outer\n      if (defn) {\n        if ((defn.contextDep && args.contextDynamic) || defn.propDep) {\n          scope = inner\n        }\n        ELEMENTS = defn.append(env, scope)\n      } else {\n        ELEMENTS = scope.def(DRAW_STATE, '.', S_ELEMENTS)\n      }\n      if (ELEMENTS) {\n        scope(\n          'if(' + ELEMENTS + ')' +\n          GL + '.bindBuffer(' + GL_ELEMENT_ARRAY_BUFFER$1 + ',' + ELEMENTS + '.buffer.buffer);')\n      }\n      return ELEMENTS\n    }\n\n    function emitCount () {\n      var defn = drawOptions.count\n      var COUNT\n      var scope = outer\n      if (defn) {\n        if ((defn.contextDep && args.contextDynamic) || defn.propDep) {\n          scope = inner\n        }\n        COUNT = defn.append(env, scope)\n        check$1.optional(function () {\n          if (defn.MISSING) {\n            env.assert(outer, 'false', 'missing vertex count')\n          }\n          if (defn.DYNAMIC) {\n            env.assert(scope, COUNT + '>=0', 'missing vertex count')\n          }\n        })\n      } else {\n        COUNT = scope.def(DRAW_STATE, '.', S_COUNT)\n        check$1.optional(function () {\n          env.assert(scope, COUNT + '>=0', 'missing vertex count')\n        })\n      }\n      return COUNT\n    }\n\n    var ELEMENTS = emitElements()\n    function emitValue (name) {\n      var defn = drawOptions[name]\n      if (defn) {\n        if ((defn.contextDep && args.contextDynamic) || defn.propDep) {\n          return defn.append(env, inner)\n        } else {\n          return defn.append(env, outer)\n        }\n      } else {\n        return outer.def(DRAW_STATE, '.', name)\n      }\n    }\n\n    var PRIMITIVE = emitValue(S_PRIMITIVE)\n    var OFFSET = emitValue(S_OFFSET)\n\n    var COUNT = emitCount()\n    if (typeof COUNT === 'number') {\n      if (COUNT === 0) {\n        return\n      }\n    } else {\n      inner('if(', COUNT, '){')\n      inner.exit('}')\n    }\n\n    var INSTANCES, EXT_INSTANCING\n    if (extInstancing) {\n      INSTANCES = emitValue(S_INSTANCES)\n      EXT_INSTANCING = env.instancing\n    }\n\n    var ELEMENT_TYPE = ELEMENTS + '.type'\n\n    var elementsStatic = drawOptions.elements && isStatic(drawOptions.elements)\n\n    function emitInstancing () {\n      function drawElements () {\n        inner(EXT_INSTANCING, '.drawElementsInstancedANGLE(', [\n          PRIMITIVE,\n          COUNT,\n          ELEMENT_TYPE,\n          OFFSET + '<<((' + ELEMENT_TYPE + '-' + GL_UNSIGNED_BYTE$8 + ')>>1)',\n          INSTANCES\n        ], ');')\n      }\n\n      function drawArrays () {\n        inner(EXT_INSTANCING, '.drawArraysInstancedANGLE(',\n          [PRIMITIVE, OFFSET, COUNT, INSTANCES], ');')\n      }\n\n      if (ELEMENTS) {\n        if (!elementsStatic) {\n          inner('if(', ELEMENTS, '){')\n          drawElements()\n          inner('}else{')\n          drawArrays()\n          inner('}')\n        } else {\n          drawElements()\n        }\n      } else {\n        drawArrays()\n      }\n    }\n\n    function emitRegular () {\n      function drawElements () {\n        inner(GL + '.drawElements(' + [\n          PRIMITIVE,\n          COUNT,\n          ELEMENT_TYPE,\n          OFFSET + '<<((' + ELEMENT_TYPE + '-' + GL_UNSIGNED_BYTE$8 + ')>>1)'\n        ] + ');')\n      }\n\n      function drawArrays () {\n        inner(GL + '.drawArrays(' + [PRIMITIVE, OFFSET, COUNT] + ');')\n      }\n\n      if (ELEMENTS) {\n        if (!elementsStatic) {\n          inner('if(', ELEMENTS, '){')\n          drawElements()\n          inner('}else{')\n          drawArrays()\n          inner('}')\n        } else {\n          drawElements()\n        }\n      } else {\n        drawArrays()\n      }\n    }\n\n    if (extInstancing && (typeof INSTANCES !== 'number' || INSTANCES >= 0)) {\n      if (typeof INSTANCES === 'string') {\n        inner('if(', INSTANCES, '>0){')\n        emitInstancing()\n        inner('}else if(', INSTANCES, '<0){')\n        emitRegular()\n        inner('}')\n      } else {\n        emitInstancing()\n      }\n    } else {\n      emitRegular()\n    }\n  }\n\n  function createBody (emitBody, parentEnv, args, program, count) {\n    var env = createREGLEnvironment()\n    var scope = env.proc('body', count)\n    check$1.optional(function () {\n      env.commandStr = parentEnv.commandStr\n      env.command = env.link(parentEnv.commandStr)\n    })\n    if (extInstancing) {\n      env.instancing = scope.def(\n        env.shared.extensions, '.angle_instanced_arrays')\n    }\n    emitBody(env, scope, args, program)\n    return env.compile().body\n  }\n\n  // ===================================================\n  // ===================================================\n  // DRAW PROC\n  // ===================================================\n  // ===================================================\n  function emitDrawBody (env, draw, args, program) {\n    injectExtensions(env, draw)\n    if (args.useVAO) {\n      if (args.drawVAO) {\n        draw(env.shared.vao, '.setVAO(', args.drawVAO.append(env, draw), ');')\n      } else {\n        draw(env.shared.vao, '.setVAO(', env.shared.vao, '.targetVAO);')\n      }\n    } else {\n      draw(env.shared.vao, '.setVAO(null);')\n      emitAttributes(env, draw, args, program.attributes, function () {\n        return true\n      })\n    }\n    emitUniforms(env, draw, args, program.uniforms, function () {\n      return true\n    })\n    emitDraw(env, draw, draw, args)\n  }\n\n  function emitDrawProc (env, args) {\n    var draw = env.proc('draw', 1)\n\n    injectExtensions(env, draw)\n\n    emitContext(env, draw, args.context)\n    emitPollFramebuffer(env, draw, args.framebuffer)\n\n    emitPollState(env, draw, args)\n    emitSetOptions(env, draw, args.state)\n\n    emitProfile(env, draw, args, false, true)\n\n    var program = args.shader.progVar.append(env, draw)\n    draw(env.shared.gl, '.useProgram(', program, '.program);')\n\n    if (args.shader.program) {\n      emitDrawBody(env, draw, args, args.shader.program)\n    } else {\n      draw(env.shared.vao, '.setVAO(null);')\n      var drawCache = env.global.def('{}')\n      var PROG_ID = draw.def(program, '.id')\n      var CACHED_PROC = draw.def(drawCache, '[', PROG_ID, ']')\n      draw(\n        env.cond(CACHED_PROC)\n          .then(CACHED_PROC, '.call(this,a0);')\n          .else(\n            CACHED_PROC, '=', drawCache, '[', PROG_ID, ']=',\n            env.link(function (program) {\n              return createBody(emitDrawBody, env, args, program, 1)\n            }), '(', program, ');',\n            CACHED_PROC, '.call(this,a0);'))\n    }\n\n    if (Object.keys(args.state).length > 0) {\n      draw(env.shared.current, '.dirty=true;')\n    }\n  }\n\n  // ===================================================\n  // ===================================================\n  // BATCH PROC\n  // ===================================================\n  // ===================================================\n\n  function emitBatchDynamicShaderBody (env, scope, args, program) {\n    env.batchId = 'a1'\n\n    injectExtensions(env, scope)\n\n    function all () {\n      return true\n    }\n\n    emitAttributes(env, scope, args, program.attributes, all)\n    emitUniforms(env, scope, args, program.uniforms, all)\n    emitDraw(env, scope, scope, args)\n  }\n\n  function emitBatchBody (env, scope, args, program) {\n    injectExtensions(env, scope)\n\n    var contextDynamic = args.contextDep\n\n    var BATCH_ID = scope.def()\n    var PROP_LIST = 'a0'\n    var NUM_PROPS = 'a1'\n    var PROPS = scope.def()\n    env.shared.props = PROPS\n    env.batchId = BATCH_ID\n\n    var outer = env.scope()\n    var inner = env.scope()\n\n    scope(\n      outer.entry,\n      'for(', BATCH_ID, '=0;', BATCH_ID, '<', NUM_PROPS, ';++', BATCH_ID, '){',\n      PROPS, '=', PROP_LIST, '[', BATCH_ID, '];',\n      inner,\n      '}',\n      outer.exit)\n\n    function isInnerDefn (defn) {\n      return ((defn.contextDep && contextDynamic) || defn.propDep)\n    }\n\n    function isOuterDefn (defn) {\n      return !isInnerDefn(defn)\n    }\n\n    if (args.needsContext) {\n      emitContext(env, inner, args.context)\n    }\n    if (args.needsFramebuffer) {\n      emitPollFramebuffer(env, inner, args.framebuffer)\n    }\n    emitSetOptions(env, inner, args.state, isInnerDefn)\n\n    if (args.profile && isInnerDefn(args.profile)) {\n      emitProfile(env, inner, args, false, true)\n    }\n\n    if (!program) {\n      var progCache = env.global.def('{}')\n      var PROGRAM = args.shader.progVar.append(env, inner)\n      var PROG_ID = inner.def(PROGRAM, '.id')\n      var CACHED_PROC = inner.def(progCache, '[', PROG_ID, ']')\n      inner(\n        env.shared.gl, '.useProgram(', PROGRAM, '.program);',\n        'if(!', CACHED_PROC, '){',\n        CACHED_PROC, '=', progCache, '[', PROG_ID, ']=',\n        env.link(function (program) {\n          return createBody(\n            emitBatchDynamicShaderBody, env, args, program, 2)\n        }), '(', PROGRAM, ');}',\n        CACHED_PROC, '.call(this,a0[', BATCH_ID, '],', BATCH_ID, ');')\n    } else {\n      if (args.useVAO) {\n        if (args.drawVAO) {\n          if (isInnerDefn(args.drawVAO)) {\n            // vao is a prop\n            inner(env.shared.vao, '.setVAO(', args.drawVAO.append(env, inner), ');')\n          } else {\n            // vao is invariant\n            outer(env.shared.vao, '.setVAO(', args.drawVAO.append(env, outer), ');')\n          }\n        } else {\n          // scoped vao binding\n          outer(env.shared.vao, '.setVAO(', env.shared.vao, '.targetVAO);')\n        }\n      } else {\n        outer(env.shared.vao, '.setVAO(null);')\n        emitAttributes(env, outer, args, program.attributes, isOuterDefn)\n        emitAttributes(env, inner, args, program.attributes, isInnerDefn)\n      }\n      emitUniforms(env, outer, args, program.uniforms, isOuterDefn)\n      emitUniforms(env, inner, args, program.uniforms, isInnerDefn)\n      emitDraw(env, outer, inner, args)\n    }\n  }\n\n  function emitBatchProc (env, args) {\n    var batch = env.proc('batch', 2)\n    env.batchId = '0'\n\n    injectExtensions(env, batch)\n\n    // Check if any context variables depend on props\n    var contextDynamic = false\n    var needsContext = true\n    Object.keys(args.context).forEach(function (name) {\n      contextDynamic = contextDynamic || args.context[name].propDep\n    })\n    if (!contextDynamic) {\n      emitContext(env, batch, args.context)\n      needsContext = false\n    }\n\n    // framebuffer state affects framebufferWidth/height context vars\n    var framebuffer = args.framebuffer\n    var needsFramebuffer = false\n    if (framebuffer) {\n      if (framebuffer.propDep) {\n        contextDynamic = needsFramebuffer = true\n      } else if (framebuffer.contextDep && contextDynamic) {\n        needsFramebuffer = true\n      }\n      if (!needsFramebuffer) {\n        emitPollFramebuffer(env, batch, framebuffer)\n      }\n    } else {\n      emitPollFramebuffer(env, batch, null)\n    }\n\n    // viewport is weird because it can affect context vars\n    if (args.state.viewport && args.state.viewport.propDep) {\n      contextDynamic = true\n    }\n\n    function isInnerDefn (defn) {\n      return (defn.contextDep && contextDynamic) || defn.propDep\n    }\n\n    // set webgl options\n    emitPollState(env, batch, args)\n    emitSetOptions(env, batch, args.state, function (defn) {\n      return !isInnerDefn(defn)\n    })\n\n    if (!args.profile || !isInnerDefn(args.profile)) {\n      emitProfile(env, batch, args, false, 'a1')\n    }\n\n    // Save these values to args so that the batch body routine can use them\n    args.contextDep = contextDynamic\n    args.needsContext = needsContext\n    args.needsFramebuffer = needsFramebuffer\n\n    // determine if shader is dynamic\n    var progDefn = args.shader.progVar\n    if ((progDefn.contextDep && contextDynamic) || progDefn.propDep) {\n      emitBatchBody(\n        env,\n        batch,\n        args,\n        null)\n    } else {\n      var PROGRAM = progDefn.append(env, batch)\n      batch(env.shared.gl, '.useProgram(', PROGRAM, '.program);')\n      if (args.shader.program) {\n        emitBatchBody(\n          env,\n          batch,\n          args,\n          args.shader.program)\n      } else {\n        batch(env.shared.vao, '.setVAO(null);')\n        var batchCache = env.global.def('{}')\n        var PROG_ID = batch.def(PROGRAM, '.id')\n        var CACHED_PROC = batch.def(batchCache, '[', PROG_ID, ']')\n        batch(\n          env.cond(CACHED_PROC)\n            .then(CACHED_PROC, '.call(this,a0,a1);')\n            .else(\n              CACHED_PROC, '=', batchCache, '[', PROG_ID, ']=',\n              env.link(function (program) {\n                return createBody(emitBatchBody, env, args, program, 2)\n              }), '(', PROGRAM, ');',\n              CACHED_PROC, '.call(this,a0,a1);'))\n      }\n    }\n\n    if (Object.keys(args.state).length > 0) {\n      batch(env.shared.current, '.dirty=true;')\n    }\n  }\n\n  // ===================================================\n  // ===================================================\n  // SCOPE COMMAND\n  // ===================================================\n  // ===================================================\n  function emitScopeProc (env, args) {\n    var scope = env.proc('scope', 3)\n    env.batchId = 'a2'\n\n    var shared = env.shared\n    var CURRENT_STATE = shared.current\n\n    emitContext(env, scope, args.context)\n\n    if (args.framebuffer) {\n      args.framebuffer.append(env, scope)\n    }\n\n    sortState(Object.keys(args.state)).forEach(function (name) {\n      var defn = args.state[name]\n      var value = defn.append(env, scope)\n      if (isArrayLike(value)) {\n        value.forEach(function (v, i) {\n          scope.set(env.next[name], '[' + i + ']', v)\n        })\n      } else {\n        scope.set(shared.next, '.' + name, value)\n      }\n    })\n\n    emitProfile(env, scope, args, true, true)\n\n    ;[S_ELEMENTS, S_OFFSET, S_COUNT, S_INSTANCES, S_PRIMITIVE].forEach(\n      function (opt) {\n        var variable = args.draw[opt]\n        if (!variable) {\n          return\n        }\n        scope.set(shared.draw, '.' + opt, '' + variable.append(env, scope))\n      })\n\n    Object.keys(args.uniforms).forEach(function (opt) {\n      var value = args.uniforms[opt].append(env, scope)\n      if (Array.isArray(value)) {\n        value = '[' + value.join() + ']'\n      }\n      scope.set(\n        shared.uniforms,\n        '[' + stringStore.id(opt) + ']',\n        value)\n    })\n\n    Object.keys(args.attributes).forEach(function (name) {\n      var record = args.attributes[name].append(env, scope)\n      var scopeAttrib = env.scopeAttrib(name)\n      Object.keys(new AttributeRecord()).forEach(function (prop) {\n        scope.set(scopeAttrib, '.' + prop, record[prop])\n      })\n    })\n\n    if (args.scopeVAO) {\n      scope.set(shared.vao, '.targetVAO', args.scopeVAO.append(env, scope))\n    }\n\n    function saveShader (name) {\n      var shader = args.shader[name]\n      if (shader) {\n        scope.set(shared.shader, '.' + name, shader.append(env, scope))\n      }\n    }\n    saveShader(S_VERT)\n    saveShader(S_FRAG)\n\n    if (Object.keys(args.state).length > 0) {\n      scope(CURRENT_STATE, '.dirty=true;')\n      scope.exit(CURRENT_STATE, '.dirty=true;')\n    }\n\n    scope('a1(', env.shared.context, ',a0,', env.batchId, ');')\n  }\n\n  function isDynamicObject (object) {\n    if (typeof object !== 'object' || isArrayLike(object)) {\n      return\n    }\n    var props = Object.keys(object)\n    for (var i = 0; i < props.length; ++i) {\n      if (dynamic.isDynamic(object[props[i]])) {\n        return true\n      }\n    }\n    return false\n  }\n\n  function splatObject (env, options, name) {\n    var object = options.static[name]\n    if (!object || !isDynamicObject(object)) {\n      return\n    }\n\n    var globals = env.global\n    var keys = Object.keys(object)\n    var thisDep = false\n    var contextDep = false\n    var propDep = false\n    var objectRef = env.global.def('{}')\n    keys.forEach(function (key) {\n      var value = object[key]\n      if (dynamic.isDynamic(value)) {\n        if (typeof value === 'function') {\n          value = object[key] = dynamic.unbox(value)\n        }\n        var deps = createDynamicDecl(value, null)\n        thisDep = thisDep || deps.thisDep\n        propDep = propDep || deps.propDep\n        contextDep = contextDep || deps.contextDep\n      } else {\n        globals(objectRef, '.', key, '=')\n        switch (typeof value) {\n          case 'number':\n            globals(value)\n            break\n          case 'string':\n            globals('\"', value, '\"')\n            break\n          case 'object':\n            if (Array.isArray(value)) {\n              globals('[', value.join(), ']')\n            }\n            break\n          default:\n            globals(env.link(value))\n            break\n        }\n        globals(';')\n      }\n    })\n\n    function appendBlock (env, block) {\n      keys.forEach(function (key) {\n        var value = object[key]\n        if (!dynamic.isDynamic(value)) {\n          return\n        }\n        var ref = env.invoke(block, value)\n        block(objectRef, '.', key, '=', ref, ';')\n      })\n    }\n\n    options.dynamic[name] = new dynamic.DynamicVariable(DYN_THUNK, {\n      thisDep: thisDep,\n      contextDep: contextDep,\n      propDep: propDep,\n      ref: objectRef,\n      append: appendBlock\n    })\n    delete options.static[name]\n  }\n\n  // ===========================================================================\n  // ===========================================================================\n  // MAIN DRAW COMMAND\n  // ===========================================================================\n  // ===========================================================================\n  function compileCommand (options, attributes, uniforms, context, stats) {\n    var env = createREGLEnvironment()\n\n    // link stats, so that we can easily access it in the program.\n    env.stats = env.link(stats)\n\n    // splat options and attributes to allow for dynamic nested properties\n    Object.keys(attributes.static).forEach(function (key) {\n      splatObject(env, attributes, key)\n    })\n    NESTED_OPTIONS.forEach(function (name) {\n      splatObject(env, options, name)\n    })\n\n    var args = parseArguments(options, attributes, uniforms, context, env)\n\n    emitDrawProc(env, args)\n    emitScopeProc(env, args)\n    emitBatchProc(env, args)\n\n    return extend(env.compile(), {\n      destroy: function () {\n        args.shader.program.destroy()\n      }\n    })\n  }\n\n  // ===========================================================================\n  // ===========================================================================\n  // POLL / REFRESH\n  // ===========================================================================\n  // ===========================================================================\n  return {\n    next: nextState,\n    current: currentState,\n    procs: (function () {\n      var env = createREGLEnvironment()\n      var poll = env.proc('poll')\n      var refresh = env.proc('refresh')\n      var common = env.block()\n      poll(common)\n      refresh(common)\n\n      var shared = env.shared\n      var GL = shared.gl\n      var NEXT_STATE = shared.next\n      var CURRENT_STATE = shared.current\n\n      common(CURRENT_STATE, '.dirty=false;')\n\n      emitPollFramebuffer(env, poll)\n      emitPollFramebuffer(env, refresh, null, true)\n\n      // Refresh updates all attribute state changes\n      var INSTANCING\n      if (extInstancing) {\n        INSTANCING = env.link(extInstancing)\n      }\n\n      // update vertex array bindings\n      if (extensions.oes_vertex_array_object) {\n        refresh(env.link(extensions.oes_vertex_array_object), '.bindVertexArrayOES(null);')\n      }\n      for (var i = 0; i < limits.maxAttributes; ++i) {\n        var BINDING = refresh.def(shared.attributes, '[', i, ']')\n        var ifte = env.cond(BINDING, '.buffer')\n        ifte.then(\n          GL, '.enableVertexAttribArray(', i, ');',\n          GL, '.bindBuffer(',\n          GL_ARRAY_BUFFER$2, ',',\n          BINDING, '.buffer.buffer);',\n          GL, '.vertexAttribPointer(',\n          i, ',',\n          BINDING, '.size,',\n          BINDING, '.type,',\n          BINDING, '.normalized,',\n          BINDING, '.stride,',\n          BINDING, '.offset);'\n        ).else(\n          GL, '.disableVertexAttribArray(', i, ');',\n          GL, '.vertexAttrib4f(',\n          i, ',',\n          BINDING, '.x,',\n          BINDING, '.y,',\n          BINDING, '.z,',\n          BINDING, '.w);',\n          BINDING, '.buffer=null;')\n        refresh(ifte)\n        if (extInstancing) {\n          refresh(\n            INSTANCING, '.vertexAttribDivisorANGLE(',\n            i, ',',\n            BINDING, '.divisor);')\n        }\n      }\n      refresh(\n        env.shared.vao, '.currentVAO=null;',\n        env.shared.vao, '.setVAO(', env.shared.vao, '.targetVAO);')\n\n      Object.keys(GL_FLAGS).forEach(function (flag) {\n        var cap = GL_FLAGS[flag]\n        var NEXT = common.def(NEXT_STATE, '.', flag)\n        var block = env.block()\n        block('if(', NEXT, '){',\n          GL, '.enable(', cap, ')}else{',\n          GL, '.disable(', cap, ')}',\n          CURRENT_STATE, '.', flag, '=', NEXT, ';')\n        refresh(block)\n        poll(\n          'if(', NEXT, '!==', CURRENT_STATE, '.', flag, '){',\n          block,\n          '}')\n      })\n\n      Object.keys(GL_VARIABLES).forEach(function (name) {\n        var func = GL_VARIABLES[name]\n        var init = currentState[name]\n        var NEXT, CURRENT\n        var block = env.block()\n        block(GL, '.', func, '(')\n        if (isArrayLike(init)) {\n          var n = init.length\n          NEXT = env.global.def(NEXT_STATE, '.', name)\n          CURRENT = env.global.def(CURRENT_STATE, '.', name)\n          block(\n            loop(n, function (i) {\n              return NEXT + '[' + i + ']'\n            }), ');',\n            loop(n, function (i) {\n              return CURRENT + '[' + i + ']=' + NEXT + '[' + i + '];'\n            }).join(''))\n          poll(\n            'if(', loop(n, function (i) {\n              return NEXT + '[' + i + ']!==' + CURRENT + '[' + i + ']'\n            }).join('||'), '){',\n            block,\n            '}')\n        } else {\n          NEXT = common.def(NEXT_STATE, '.', name)\n          CURRENT = common.def(CURRENT_STATE, '.', name)\n          block(\n            NEXT, ');',\n            CURRENT_STATE, '.', name, '=', NEXT, ';')\n          poll(\n            'if(', NEXT, '!==', CURRENT, '){',\n            block,\n            '}')\n        }\n        refresh(block)\n      })\n\n      return env.compile()\n    })(),\n    compile: compileCommand\n  }\n}\n\nfunction stats () {\n  return {\n    vaoCount: 0,\n    bufferCount: 0,\n    elementsCount: 0,\n    framebufferCount: 0,\n    shaderCount: 0,\n    textureCount: 0,\n    cubeCount: 0,\n    renderbufferCount: 0,\n    maxTextureUnits: 0\n  }\n}\n\nvar GL_QUERY_RESULT_EXT = 0x8866\nvar GL_QUERY_RESULT_AVAILABLE_EXT = 0x8867\nvar GL_TIME_ELAPSED_EXT = 0x88BF\n\nvar createTimer = function (gl, extensions) {\n  if (!extensions.ext_disjoint_timer_query) {\n    return null\n  }\n\n  // QUERY POOL BEGIN\n  var queryPool = []\n  function allocQuery () {\n    return queryPool.pop() || extensions.ext_disjoint_timer_query.createQueryEXT()\n  }\n  function freeQuery (query) {\n    queryPool.push(query)\n  }\n  // QUERY POOL END\n\n  var pendingQueries = []\n  function beginQuery (stats) {\n    var query = allocQuery()\n    extensions.ext_disjoint_timer_query.beginQueryEXT(GL_TIME_ELAPSED_EXT, query)\n    pendingQueries.push(query)\n    pushScopeStats(pendingQueries.length - 1, pendingQueries.length, stats)\n  }\n\n  function endQuery () {\n    extensions.ext_disjoint_timer_query.endQueryEXT(GL_TIME_ELAPSED_EXT)\n  }\n\n  //\n  // Pending stats pool.\n  //\n  function PendingStats () {\n    this.startQueryIndex = -1\n    this.endQueryIndex = -1\n    this.sum = 0\n    this.stats = null\n  }\n  var pendingStatsPool = []\n  function allocPendingStats () {\n    return pendingStatsPool.pop() || new PendingStats()\n  }\n  function freePendingStats (pendingStats) {\n    pendingStatsPool.push(pendingStats)\n  }\n  // Pending stats pool end\n\n  var pendingStats = []\n  function pushScopeStats (start, end, stats) {\n    var ps = allocPendingStats()\n    ps.startQueryIndex = start\n    ps.endQueryIndex = end\n    ps.sum = 0\n    ps.stats = stats\n    pendingStats.push(ps)\n  }\n\n  // we should call this at the beginning of the frame,\n  // in order to update gpuTime\n  var timeSum = []\n  var queryPtr = []\n  function update () {\n    var ptr, i\n\n    var n = pendingQueries.length\n    if (n === 0) {\n      return\n    }\n\n    // Reserve space\n    queryPtr.length = Math.max(queryPtr.length, n + 1)\n    timeSum.length = Math.max(timeSum.length, n + 1)\n    timeSum[0] = 0\n    queryPtr[0] = 0\n\n    // Update all pending timer queries\n    var queryTime = 0\n    ptr = 0\n    for (i = 0; i < pendingQueries.length; ++i) {\n      var query = pendingQueries[i]\n      if (extensions.ext_disjoint_timer_query.getQueryObjectEXT(query, GL_QUERY_RESULT_AVAILABLE_EXT)) {\n        queryTime += extensions.ext_disjoint_timer_query.getQueryObjectEXT(query, GL_QUERY_RESULT_EXT)\n        freeQuery(query)\n      } else {\n        pendingQueries[ptr++] = query\n      }\n      timeSum[i + 1] = queryTime\n      queryPtr[i + 1] = ptr\n    }\n    pendingQueries.length = ptr\n\n    // Update all pending stat queries\n    ptr = 0\n    for (i = 0; i < pendingStats.length; ++i) {\n      var stats = pendingStats[i]\n      var start = stats.startQueryIndex\n      var end = stats.endQueryIndex\n      stats.sum += timeSum[end] - timeSum[start]\n      var startPtr = queryPtr[start]\n      var endPtr = queryPtr[end]\n      if (endPtr === startPtr) {\n        stats.stats.gpuTime += stats.sum / 1e6\n        freePendingStats(stats)\n      } else {\n        stats.startQueryIndex = startPtr\n        stats.endQueryIndex = endPtr\n        pendingStats[ptr++] = stats\n      }\n    }\n    pendingStats.length = ptr\n  }\n\n  return {\n    beginQuery: beginQuery,\n    endQuery: endQuery,\n    pushScopeStats: pushScopeStats,\n    update: update,\n    getNumPendingQueries: function () {\n      return pendingQueries.length\n    },\n    clear: function () {\n      queryPool.push.apply(queryPool, pendingQueries)\n      for (var i = 0; i < queryPool.length; i++) {\n        extensions.ext_disjoint_timer_query.deleteQueryEXT(queryPool[i])\n      }\n      pendingQueries.length = 0\n      queryPool.length = 0\n    },\n    restore: function () {\n      pendingQueries.length = 0\n      queryPool.length = 0\n    }\n  }\n}\n\nvar GL_COLOR_BUFFER_BIT = 16384\nvar GL_DEPTH_BUFFER_BIT = 256\nvar GL_STENCIL_BUFFER_BIT = 1024\n\nvar GL_ARRAY_BUFFER = 34962\n\nvar CONTEXT_LOST_EVENT = 'webglcontextlost'\nvar CONTEXT_RESTORED_EVENT = 'webglcontextrestored'\n\nvar DYN_PROP = 1\nvar DYN_CONTEXT = 2\nvar DYN_STATE = 3\n\nfunction find (haystack, needle) {\n  for (var i = 0; i < haystack.length; ++i) {\n    if (haystack[i] === needle) {\n      return i\n    }\n  }\n  return -1\n}\n\nfunction wrapREGL (args) {\n  var config = parseArgs(args)\n  if (!config) {\n    return null\n  }\n\n  var gl = config.gl\n  var glAttributes = gl.getContextAttributes()\n  var contextLost = gl.isContextLost()\n\n  var extensionState = createExtensionCache(gl, config)\n  if (!extensionState) {\n    return null\n  }\n\n  var stringStore = createStringStore()\n  var stats$$1 = stats()\n  var extensions = extensionState.extensions\n  var timer = createTimer(gl, extensions)\n\n  var START_TIME = clock()\n  var WIDTH = gl.drawingBufferWidth\n  var HEIGHT = gl.drawingBufferHeight\n\n  var contextState = {\n    tick: 0,\n    time: 0,\n    viewportWidth: WIDTH,\n    viewportHeight: HEIGHT,\n    framebufferWidth: WIDTH,\n    framebufferHeight: HEIGHT,\n    drawingBufferWidth: WIDTH,\n    drawingBufferHeight: HEIGHT,\n    pixelRatio: config.pixelRatio\n  }\n  var uniformState = {}\n  var drawState = {\n    elements: null,\n    primitive: 4, // GL_TRIANGLES\n    count: -1,\n    offset: 0,\n    instances: -1\n  }\n\n  var limits = wrapLimits(gl, extensions)\n  var bufferState = wrapBufferState(\n    gl,\n    stats$$1,\n    config,\n    destroyBuffer)\n  var attributeState = wrapAttributeState(\n    gl,\n    extensions,\n    limits,\n    stats$$1,\n    bufferState)\n  function destroyBuffer (buffer) {\n    return attributeState.destroyBuffer(buffer)\n  }\n  var elementState = wrapElementsState(gl, extensions, bufferState, stats$$1)\n  var shaderState = wrapShaderState(gl, stringStore, stats$$1, config)\n  var textureState = createTextureSet(\n    gl,\n    extensions,\n    limits,\n    function () { core.procs.poll() },\n    contextState,\n    stats$$1,\n    config)\n  var renderbufferState = wrapRenderbuffers(gl, extensions, limits, stats$$1, config)\n  var framebufferState = wrapFBOState(\n    gl,\n    extensions,\n    limits,\n    textureState,\n    renderbufferState,\n    stats$$1)\n  var core = reglCore(\n    gl,\n    stringStore,\n    extensions,\n    limits,\n    bufferState,\n    elementState,\n    textureState,\n    framebufferState,\n    uniformState,\n    attributeState,\n    shaderState,\n    drawState,\n    contextState,\n    timer,\n    config)\n  var readPixels = wrapReadPixels(\n    gl,\n    framebufferState,\n    core.procs.poll,\n    contextState,\n    glAttributes, extensions, limits)\n\n  var nextState = core.next\n  var canvas = gl.canvas\n\n  var rafCallbacks = []\n  var lossCallbacks = []\n  var restoreCallbacks = []\n  var destroyCallbacks = [config.onDestroy]\n\n  var activeRAF = null\n  function handleRAF () {\n    if (rafCallbacks.length === 0) {\n      if (timer) {\n        timer.update()\n      }\n      activeRAF = null\n      return\n    }\n\n    // schedule next animation frame\n    activeRAF = raf.next(handleRAF)\n\n    // poll for changes\n    poll()\n\n    // fire a callback for all pending rafs\n    for (var i = rafCallbacks.length - 1; i >= 0; --i) {\n      var cb = rafCallbacks[i]\n      if (cb) {\n        cb(contextState, null, 0)\n      }\n    }\n\n    // flush all pending webgl calls\n    gl.flush()\n\n    // poll GPU timers *after* gl.flush so we don't delay command dispatch\n    if (timer) {\n      timer.update()\n    }\n  }\n\n  function startRAF () {\n    if (!activeRAF && rafCallbacks.length > 0) {\n      activeRAF = raf.next(handleRAF)\n    }\n  }\n\n  function stopRAF () {\n    if (activeRAF) {\n      raf.cancel(handleRAF)\n      activeRAF = null\n    }\n  }\n\n  function handleContextLoss (event) {\n    event.preventDefault()\n\n    // set context lost flag\n    contextLost = true\n\n    // pause request animation frame\n    stopRAF()\n\n    // lose context\n    lossCallbacks.forEach(function (cb) {\n      cb()\n    })\n  }\n\n  function handleContextRestored (event) {\n    // clear error code\n    gl.getError()\n\n    // clear context lost flag\n    contextLost = false\n\n    // refresh state\n    extensionState.restore()\n    shaderState.restore()\n    bufferState.restore()\n    textureState.restore()\n    renderbufferState.restore()\n    framebufferState.restore()\n    attributeState.restore()\n    if (timer) {\n      timer.restore()\n    }\n\n    // refresh state\n    core.procs.refresh()\n\n    // restart RAF\n    startRAF()\n\n    // restore context\n    restoreCallbacks.forEach(function (cb) {\n      cb()\n    })\n  }\n\n  if (canvas) {\n    canvas.addEventListener(CONTEXT_LOST_EVENT, handleContextLoss, false)\n    canvas.addEventListener(CONTEXT_RESTORED_EVENT, handleContextRestored, false)\n  }\n\n  function destroy () {\n    rafCallbacks.length = 0\n    stopRAF()\n\n    if (canvas) {\n      canvas.removeEventListener(CONTEXT_LOST_EVENT, handleContextLoss)\n      canvas.removeEventListener(CONTEXT_RESTORED_EVENT, handleContextRestored)\n    }\n\n    shaderState.clear()\n    framebufferState.clear()\n    renderbufferState.clear()\n    textureState.clear()\n    elementState.clear()\n    bufferState.clear()\n    attributeState.clear()\n\n    if (timer) {\n      timer.clear()\n    }\n\n    destroyCallbacks.forEach(function (cb) {\n      cb()\n    })\n  }\n\n  function compileProcedure (options) {\n    check$1(!!options, 'invalid args to regl({...})')\n    check$1.type(options, 'object', 'invalid args to regl({...})')\n\n    function flattenNestedOptions (options) {\n      var result = extend({}, options)\n      delete result.uniforms\n      delete result.attributes\n      delete result.context\n      delete result.vao\n\n      if ('stencil' in result && result.stencil.op) {\n        result.stencil.opBack = result.stencil.opFront = result.stencil.op\n        delete result.stencil.op\n      }\n\n      function merge (name) {\n        if (name in result) {\n          var child = result[name]\n          delete result[name]\n          Object.keys(child).forEach(function (prop) {\n            result[name + '.' + prop] = child[prop]\n          })\n        }\n      }\n      merge('blend')\n      merge('depth')\n      merge('cull')\n      merge('stencil')\n      merge('polygonOffset')\n      merge('scissor')\n      merge('sample')\n\n      if ('vao' in options) {\n        result.vao = options.vao\n      }\n\n      return result\n    }\n\n    function separateDynamic (object, useArrays) {\n      var staticItems = {}\n      var dynamicItems = {}\n      Object.keys(object).forEach(function (option) {\n        var value = object[option]\n        if (dynamic.isDynamic(value)) {\n          dynamicItems[option] = dynamic.unbox(value, option)\n          return\n        } else if (useArrays && Array.isArray(value)) {\n          for (var i = 0; i < value.length; ++i) {\n            if (dynamic.isDynamic(value[i])) {\n              dynamicItems[option] = dynamic.unbox(value, option)\n              return\n            }\n          }\n        }\n        staticItems[option] = value\n      })\n      return {\n        dynamic: dynamicItems,\n        static: staticItems\n      }\n    }\n\n    // Treat context variables separate from other dynamic variables\n    var context = separateDynamic(options.context || {}, true)\n    var uniforms = separateDynamic(options.uniforms || {}, true)\n    var attributes = separateDynamic(options.attributes || {}, false)\n    var opts = separateDynamic(flattenNestedOptions(options), false)\n\n    var stats$$1 = {\n      gpuTime: 0.0,\n      cpuTime: 0.0,\n      count: 0\n    }\n\n    var compiled = core.compile(opts, attributes, uniforms, context, stats$$1)\n\n    var draw = compiled.draw\n    var batch = compiled.batch\n    var scope = compiled.scope\n\n    // FIXME: we should modify code generation for batch commands so this\n    // isn't necessary\n    var EMPTY_ARRAY = []\n    function reserve (count) {\n      while (EMPTY_ARRAY.length < count) {\n        EMPTY_ARRAY.push(null)\n      }\n      return EMPTY_ARRAY\n    }\n\n    function REGLCommand (args, body) {\n      var i\n      if (contextLost) {\n        check$1.raise('context lost')\n      }\n      if (typeof args === 'function') {\n        return scope.call(this, null, args, 0)\n      } else if (typeof body === 'function') {\n        if (typeof args === 'number') {\n          for (i = 0; i < args; ++i) {\n            scope.call(this, null, body, i)\n          }\n        } else if (Array.isArray(args)) {\n          for (i = 0; i < args.length; ++i) {\n            scope.call(this, args[i], body, i)\n          }\n        } else {\n          return scope.call(this, args, body, 0)\n        }\n      } else if (typeof args === 'number') {\n        if (args > 0) {\n          return batch.call(this, reserve(args | 0), args | 0)\n        }\n      } else if (Array.isArray(args)) {\n        if (args.length) {\n          return batch.call(this, args, args.length)\n        }\n      } else {\n        return draw.call(this, args)\n      }\n    }\n\n    return extend(REGLCommand, {\n      stats: stats$$1,\n      destroy: function () {\n        compiled.destroy()\n      }\n    })\n  }\n\n  var setFBO = framebufferState.setFBO = compileProcedure({\n    framebuffer: dynamic.define.call(null, DYN_PROP, 'framebuffer')\n  })\n\n  function clearImpl (_, options) {\n    var clearFlags = 0\n    core.procs.poll()\n\n    var c = options.color\n    if (c) {\n      gl.clearColor(+c[0] || 0, +c[1] || 0, +c[2] || 0, +c[3] || 0)\n      clearFlags |= GL_COLOR_BUFFER_BIT\n    }\n    if ('depth' in options) {\n      gl.clearDepth(+options.depth)\n      clearFlags |= GL_DEPTH_BUFFER_BIT\n    }\n    if ('stencil' in options) {\n      gl.clearStencil(options.stencil | 0)\n      clearFlags |= GL_STENCIL_BUFFER_BIT\n    }\n\n    check$1(!!clearFlags, 'called regl.clear with no buffer specified')\n    gl.clear(clearFlags)\n  }\n\n  function clear (options) {\n    check$1(\n      typeof options === 'object' && options,\n      'regl.clear() takes an object as input')\n    if ('framebuffer' in options) {\n      if (options.framebuffer &&\n          options.framebuffer_reglType === 'framebufferCube') {\n        for (var i = 0; i < 6; ++i) {\n          setFBO(extend({\n            framebuffer: options.framebuffer.faces[i]\n          }, options), clearImpl)\n        }\n      } else {\n        setFBO(options, clearImpl)\n      }\n    } else {\n      clearImpl(null, options)\n    }\n  }\n\n  function frame (cb) {\n    check$1.type(cb, 'function', 'regl.frame() callback must be a function')\n    rafCallbacks.push(cb)\n\n    function cancel () {\n      // FIXME:  should we check something other than equals cb here?\n      // what if a user calls frame twice with the same callback...\n      //\n      var i = find(rafCallbacks, cb)\n      check$1(i >= 0, 'cannot cancel a frame twice')\n      function pendingCancel () {\n        var index = find(rafCallbacks, pendingCancel)\n        rafCallbacks[index] = rafCallbacks[rafCallbacks.length - 1]\n        rafCallbacks.length -= 1\n        if (rafCallbacks.length <= 0) {\n          stopRAF()\n        }\n      }\n      rafCallbacks[i] = pendingCancel\n    }\n\n    startRAF()\n\n    return {\n      cancel: cancel\n    }\n  }\n\n  // poll viewport\n  function pollViewport () {\n    var viewport = nextState.viewport\n    var scissorBox = nextState.scissor_box\n    viewport[0] = viewport[1] = scissorBox[0] = scissorBox[1] = 0\n    contextState.viewportWidth =\n      contextState.framebufferWidth =\n      contextState.drawingBufferWidth =\n      viewport[2] =\n      scissorBox[2] = gl.drawingBufferWidth\n    contextState.viewportHeight =\n      contextState.framebufferHeight =\n      contextState.drawingBufferHeight =\n      viewport[3] =\n      scissorBox[3] = gl.drawingBufferHeight\n  }\n\n  function poll () {\n    contextState.tick += 1\n    contextState.time = now()\n    pollViewport()\n    core.procs.poll()\n  }\n\n  function refresh () {\n    textureState.refresh()\n    pollViewport()\n    core.procs.refresh()\n    if (timer) {\n      timer.update()\n    }\n  }\n\n  function now () {\n    return (clock() - START_TIME) / 1000.0\n  }\n\n  refresh()\n\n  function addListener (event, callback) {\n    check$1.type(callback, 'function', 'listener callback must be a function')\n\n    var callbacks\n    switch (event) {\n      case 'frame':\n        return frame(callback)\n      case 'lost':\n        callbacks = lossCallbacks\n        break\n      case 'restore':\n        callbacks = restoreCallbacks\n        break\n      case 'destroy':\n        callbacks = destroyCallbacks\n        break\n      default:\n        check$1.raise('invalid event, must be one of frame,lost,restore,destroy')\n    }\n\n    callbacks.push(callback)\n    return {\n      cancel: function () {\n        for (var i = 0; i < callbacks.length; ++i) {\n          if (callbacks[i] === callback) {\n            callbacks[i] = callbacks[callbacks.length - 1]\n            callbacks.pop()\n            return\n          }\n        }\n      }\n    }\n  }\n\n  var regl = extend(compileProcedure, {\n    // Clear current FBO\n    clear: clear,\n\n    // Short cuts for dynamic variables\n    prop: dynamic.define.bind(null, DYN_PROP),\n    context: dynamic.define.bind(null, DYN_CONTEXT),\n    this: dynamic.define.bind(null, DYN_STATE),\n\n    // executes an empty draw command\n    draw: compileProcedure({}),\n\n    // Resources\n    buffer: function (options) {\n      return bufferState.create(options, GL_ARRAY_BUFFER, false, false)\n    },\n    elements: function (options) {\n      return elementState.create(options, false)\n    },\n    texture: textureState.create2D,\n    cube: textureState.createCube,\n    renderbuffer: renderbufferState.create,\n    framebuffer: framebufferState.create,\n    framebufferCube: framebufferState.createCube,\n    vao: attributeState.createVAO,\n\n    // Expose context attributes\n    attributes: glAttributes,\n\n    // Frame rendering\n    frame: frame,\n    on: addListener,\n\n    // System limits\n    limits: limits,\n    hasExtension: function (name) {\n      return limits.extensions.indexOf(name.toLowerCase()) >= 0\n    },\n\n    // Read pixels\n    read: readPixels,\n\n    // Destroy regl and all associated resources\n    destroy: destroy,\n\n    // Direct GL state manipulation\n    _gl: gl,\n    _refresh: refresh,\n\n    poll: function () {\n      poll()\n      if (timer) {\n        timer.update()\n      }\n    },\n\n    // Current time\n    now: now,\n\n    // regl Statistics Information\n    stats: stats$$1\n  })\n\n  config.onDone(null, regl)\n\n  return regl\n}\n\nreturn wrapREGL;\n\n})));\n//# sourceMappingURL=regl.js.map\n", "//const transforms = require('./glsl-transforms.js')\n\nvar Output = function ({ regl, precision, label = \"\", width, height}) {\n  this.regl = regl\n  this.precision = precision\n  this.label = label\n  this.positionBuffer = this.regl.buffer([\n    [-2, 0],\n    [0, -2],\n    [2, 2]\n  ])\n\n  this.draw = () => {}\n  this.init()\n  this.pingPongIndex = 0\n\n  // for each output, create two fbos for pingponging\n  this.fbos = (Array(2)).fill().map(() => this.regl.framebuffer({\n    color: this.regl.texture({\n      mag: 'nearest',\n      width: width,\n      height: height,\n      format: 'rgba'\n    }),\n    depthStencil: false\n  }))\n\n  // array containing render passes\n//  this.passes = []\n}\n\nOutput.prototype.resize = function(width, height) {\n  this.fbos.forEach((fbo) => {\n    fbo.resize(width, height)\n  })\n//  console.log(this)\n}\n\n\nOutput.prototype.getCurrent = function () {\n  return this.fbos[this.pingPongIndex]\n}\n\nOutput.prototype.getTexture = function () {\n   var index = this.pingPongIndex ? 0 : 1\n  return this.fbos[index]\n}\n\nOutput.prototype.init = function () {\n//  console.log('clearing')\n  this.transformIndex = 0\n  this.fragHeader = `\n  precision ${this.precision} float;\n\n  uniform float time;\n  varying vec2 uv;\n  `\n\n  this.fragBody = ``\n\n  this.vert = `\n  precision ${this.precision} float;\n  attribute vec2 position;\n  varying vec2 uv;\n\n  void main () {\n    uv = position;\n    gl_Position = vec4(2.0 * position - 1.0, 0, 1);\n  }`\n\n  this.attributes = {\n    position: this.positionBuffer\n  }\n  this.uniforms = {\n    time: this.regl.prop('time'),\n    resolution: this.regl.prop('resolution')\n  }\n\n  this.frag = `\n       ${this.fragHeader}\n\n      void main () {\n        vec4 c = vec4(0, 0, 0, 0);\n        vec2 st = uv;\n        ${this.fragBody}\n        gl_FragColor = c;\n      }\n  `\n  return this\n}\n\n\nOutput.prototype.render = function (passes) {\n  let pass = passes[0]\n  //console.log('pass', pass, this.pingPongIndex)\n  var self = this\n      var uniforms = Object.assign(pass.uniforms, { prevBuffer:  () =>  {\n             //var index = this.pingPongIndex ? 0 : 1\n          //   var index = self.pingPong[(passIndex+1)%2]\n          //  console.log('ping pong', self.pingPongIndex)\n            return self.fbos[self.pingPongIndex]\n          }\n        })\n\n  self.draw = self.regl({\n    frag: pass.frag,\n    vert: self.vert,\n    attributes: self.attributes,\n    uniforms: uniforms,\n    count: 3,\n    framebuffer: () => {\n      self.pingPongIndex = self.pingPongIndex ? 0 : 1\n      return self.fbos[self.pingPongIndex]\n    }\n  })\n}\n\n\nOutput.prototype.tick = function (props) {\n//  console.log(props)\n  this.draw(props)\n}\n\nexport default Output\n", "\nimport Output from './output.js'\nimport loop from 'raf-loop'\nimport Source from './hydra-source.js'\nimport MouseTools from './lib/mouse.js'\nimport Audio from './lib/audio.js'\nimport VidRecorder from './lib/video-recorder.js'\nimport ArrayUtils from './lib/array-utils.js'\n// import strudel from './lib/strudel.js'\nimport Sandbox from './eval-sandbox.js'\nimport Generator from './generator-factory.js'\nimport regl from 'regl'\n// const window = global.window\n\n\n\nconst Mouse = MouseTools()\n// to do: add ability to pass in certain uniforms and transforms\nclass HydraRenderer {\n\n  constructor ({\n    pb = null,\n    width = 1280,\n    height = 720,\n    numSources = 4,\n    numOutputs = 4,\n    makeGlobal = true,\n    autoLoop = true,\n    detectAudio = true,\n    enableStreamCapture = true,\n    canvas,\n    precision,\n    extendTransforms = {} // add your own functions on init\n  } = {}) {\n\n    ArrayUtils.init()\n\n    this.pb = pb\n\n    this.width = width\n    this.height = height\n    this.renderAll = false\n    this.detectAudio = detectAudio\n\n    this._initCanvas(canvas)\n\n    //global.window.test = 'hi'\n    // object that contains all properties that will be made available on the global context and during local evaluation\n    this.synth = {\n      time: 0,\n      bpm: 30,\n      width: this.width,\n      height: this.height,\n      fps: undefined,\n      stats: {\n        fps: 0\n      },\n      speed: 1,\n      mouse: Mouse,\n      render: this._render.bind(this),\n      setResolution: this.setResolution.bind(this),\n      update: (dt) => {},// user defined update function\n      hush: this.hush.bind(this),\n      tick: this.tick.bind(this)\n    }\n\n    if (makeGlobal) window.loadScript = this.loadScript\n\n\n    this.timeSinceLastUpdate = 0\n    this._time = 0 // for internal use, only to use for deciding when to render frames\n\n    // only allow valid precision options\n    let precisionOptions = ['lowp','mediump','highp']\n    if(precision && precisionOptions.includes(precision.toLowerCase())) {\n      this.precision = precision.toLowerCase()\n      //\n      // if(!precisionValid){\n      //   console.warn('[hydra-synth warning]\\nConstructor was provided an invalid floating point precision value of \"' + precision + '\". Using default value of \"mediump\" instead.')\n      // }\n    } else {\n      let isIOS =\n    (/iPad|iPhone|iPod/.test(navigator.platform) ||\n      (navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1)) &&\n    !window.MSStream;\n      this.precision = isIOS ? 'highp' : 'mediump'\n    }\n\n\n\n    this.extendTransforms = extendTransforms\n\n    // boolean to store when to save screenshot\n    this.saveFrame = false\n\n    // if stream capture is enabled, this object contains the capture stream\n    this.captureStream = null\n\n    this.generator = undefined\n\n    this._initRegl()\n    this._initOutputs(numOutputs)\n    this._initSources(numSources)\n    this._generateGlslTransforms()\n\n    this.synth.screencap = () => {\n      this.saveFrame = true\n    }\n\n    if (enableStreamCapture) {\n      try {\n        this.captureStream = this.canvas.captureStream(25)\n        // to do: enable capture stream of specific sources and outputs\n        this.synth.vidRecorder = new VidRecorder(this.captureStream)\n      } catch (e) {\n        console.warn('[hydra-synth warning]\\nnew MediaSource() is not currently supported on iOS.')\n        console.error(e)\n      }\n    }\n\n    if(detectAudio) this._initAudio()\n\n    if(autoLoop) loop(this.tick.bind(this)).start()\n\n    // final argument is properties that the user can set, all others are treated as read-only\n    this.sandbox = new Sandbox(this.synth, makeGlobal, ['speed', 'update', 'bpm', 'fps'])\n  }\n\n  eval(code) {\n    this.sandbox.eval(code)\n  }\n\n  getScreenImage(callback) {\n    this.imageCallback = callback\n    this.saveFrame = true\n  }\n\n  hush() {\n    this.s.forEach((source) => {\n      source.clear()\n    })\n    this.o.forEach((output) => {\n      this.synth.solid(0, 0, 0, 0).out(output)\n    })\n    this.synth.render(this.o[0])\n    // this.synth.update = (dt) => {}\n    this.sandbox.set('update', (dt) => {})\n  }\n\n  loadScript(url = \"\") {\n   const p = new Promise((res, rej) => {\n     var script = document.createElement(\"script\");\n     script.onload = function () {\n       console.log(`loaded script ${url}`);\n       res();\n     };\n     script.onerror = (err) => {\n       console.log(`error loading script ${url}`, \"log-error\");\n       res()\n     };\n     script.src = url;\n     document.head.appendChild(script);\n   });\n   return p;\n }\n\n  setResolution(width, height) {\n  //  console.log(width, height)\n    this.canvas.width = width\n    this.canvas.height = height\n    this.width = width // is this necessary?\n    this.height = height // ?\n    this.sandbox.set('width', width)\n    this.sandbox.set('height', height)\n    console.log(this.width)\n    this.o.forEach((output) => {\n      output.resize(width, height)\n    })\n    this.s.forEach((source) => {\n      source.resize(width, height)\n    })\n    this.regl._refresh()\n     console.log(this.canvas.width)\n  }\n\n  canvasToImage (callback) {\n    const a = document.createElement('a')\n    a.style.display = 'none'\n\n    let d = new Date()\n    a.download = `hydra-${d.getFullYear()}-${d.getMonth() + 1}-${d.getDate()}-${d.getHours()}.${d.getMinutes()}.${d.getSeconds()}.png`\n    document.body.appendChild(a)\n    var self = this\n    this.canvas.toBlob( (blob) => {\n        if(self.imageCallback){\n          self.imageCallback(blob)\n          delete self.imageCallback\n        } else {\n          a.href = URL.createObjectURL(blob)\n          console.log(a.href)\n          a.click()\n        }\n    }, 'image/png')\n    setTimeout(() => {\n      document.body.removeChild(a);\n      window.URL.revokeObjectURL(a.href);\n    }, 300);\n  }\n\n  _initAudio () {\n    const that = this\n    this.synth.a = new Audio({\n      numBins: 4,\n      parentEl: this.canvas.parentNode\n      // changeListener: ({audio}) => {\n      //   that.a = audio.bins.map((_, index) =>\n      //     (scale = 1, offset = 0) => () => (audio.fft[index] * scale + offset)\n      //   )\n      //\n      //   if (that.makeGlobal) {\n      //     that.a.forEach((a, index) => {\n      //       const aname = `a${index}`\n      //       window[aname] = a\n      //     })\n      //   }\n      // }\n    })\n  }\n\n  // create main output canvas and add to screen\n  _initCanvas (canvas) {\n    if (canvas) {\n      this.canvas = canvas\n      this.width = canvas.width\n      this.height = canvas.height\n    } else {\n      this.canvas = document.createElement('canvas')\n      this.canvas.width = this.width\n      this.canvas.height = this.height\n      this.canvas.style.width = '100%'\n      this.canvas.style.height = '100%'\n      this.canvas.style.imageRendering = 'pixelated'\n      document.body.appendChild(this.canvas)\n    }\n  }\n\n  _initRegl () {\n    this.regl = regl({\n    //  profile: true,\n      canvas: this.canvas,\n      pixelRatio: 1//,\n      // extensions: [\n      //   'oes_texture_half_float',\n      //   'oes_texture_half_float_linear'\n      // ],\n      // optionalExtensions: [\n      //   'oes_texture_float',\n      //   'oes_texture_float_linear'\n     //]\n   })\n\n    // This clears the color buffer to black and the depth buffer to 1\n    this.regl.clear({\n      color: [0, 0, 0, 1]\n    })\n\n    this.renderAll = this.regl({\n      frag: `\n      precision ${this.precision} float;\n      varying vec2 uv;\n      uniform sampler2D tex0;\n      uniform sampler2D tex1;\n      uniform sampler2D tex2;\n      uniform sampler2D tex3;\n\n      void main () {\n        vec2 st = vec2(1.0 - uv.x, uv.y);\n        st*= vec2(2);\n        vec2 q = floor(st).xy*(vec2(2.0, 1.0));\n        int quad = int(q.x) + int(q.y);\n        st.x += step(1., mod(st.y,2.0));\n        st.y += step(1., mod(st.x,2.0));\n        st = fract(st);\n        if(quad==0){\n          gl_FragColor = texture2D(tex0, st);\n        } else if(quad==1){\n          gl_FragColor = texture2D(tex1, st);\n        } else if (quad==2){\n          gl_FragColor = texture2D(tex2, st);\n        } else {\n          gl_FragColor = texture2D(tex3, st);\n        }\n\n      }\n      `,\n      vert: `\n      precision ${this.precision} float;\n      attribute vec2 position;\n      varying vec2 uv;\n\n      void main () {\n        uv = position;\n        gl_Position = vec4(1.0 - 2.0 * position, 0, 1);\n      }`,\n      attributes: {\n        position: [\n          [-2, 0],\n          [0, -2],\n          [2, 2]\n        ]\n      },\n      uniforms: {\n        tex0: this.regl.prop('tex0'),\n        tex1: this.regl.prop('tex1'),\n        tex2: this.regl.prop('tex2'),\n        tex3: this.regl.prop('tex3')\n      },\n      count: 3,\n      depth: { enable: false }\n    })\n\n    this.renderFbo = this.regl({\n      frag: `\n      precision ${this.precision} float;\n      varying vec2 uv;\n      uniform vec2 resolution;\n      uniform sampler2D tex0;\n\n      void main () {\n        gl_FragColor = texture2D(tex0, vec2(1.0 - uv.x, uv.y));\n      }\n      `,\n      vert: `\n      precision ${this.precision} float;\n      attribute vec2 position;\n      varying vec2 uv;\n\n      void main () {\n        uv = position;\n        gl_Position = vec4(1.0 - 2.0 * position, 0, 1);\n      }`,\n      attributes: {\n        position: [\n          [-2, 0],\n          [0, -2],\n          [2, 2]\n        ]\n      },\n      uniforms: {\n        tex0: this.regl.prop('tex0'),\n        resolution: this.regl.prop('resolution')\n      },\n      count: 3,\n      depth: { enable: false }\n    })\n  }\n\n  _initOutputs (numOutputs) {\n    const self = this\n    this.o = (Array(numOutputs)).fill().map((el, index) => {\n      var o = new Output({\n        regl: this.regl,\n        width: this.width,\n        height: this.height,\n        precision: this.precision,\n        label: `o${index}`\n      })\n    //  o.render()\n      o.id = index\n      self.synth['o'+index] = o\n      return o\n    })\n\n    // set default output\n    this.output = this.o[0]\n  }\n\n  _initSources (numSources) {\n    this.s = []\n    for(var i = 0; i < numSources; i++) {\n      this.createSource(i)\n    }\n  }\n\n  createSource (i) {\n    let s = new Source({regl: this.regl, pb: this.pb, width: this.width, height: this.height, label: `s${i}`})\n    this.synth['s' + this.s.length] = s\n    this.s.push(s)\n    return s\n  }\n\n  _generateGlslTransforms () {\n    var self = this\n    this.generator = new Generator({\n      defaultOutput: this.o[0],\n      defaultUniforms: this.o[0].uniforms,\n      extendTransforms: this.extendTransforms,\n      changeListener: ({type, method, synth}) => {\n          if (type === 'add') {\n            self.synth[method] = synth.generators[method]\n            if(self.sandbox) self.sandbox.add(method)\n          } else if (type === 'remove') {\n            // what to do here? dangerously deleting window methods\n            //delete window[method]\n          }\n      //  }\n      }\n    })\n    this.synth.setFunction = this.generator.setFunction.bind(this.generator)\n  }\n\n  _render (output) {\n    if (output) {\n      this.output = output\n      this.isRenderingAll = false\n    } else {\n      this.isRenderingAll = true\n    }\n  }\n\n  // dt in ms\n  tick (dt, uniforms) {\n    this.sandbox.tick()\n    if(this.detectAudio === true) this.synth.a.tick()\n  //  let updateInterval = 1000/this.synth.fps // ms\n    this.sandbox.set('time', this.synth.time += dt * 0.001 * this.synth.speed)\n    this.timeSinceLastUpdate += dt\n    if(!this.synth.fps || this.timeSinceLastUpdate >= 1000/this.synth.fps) {\n    //  console.log(1000/this.timeSinceLastUpdate)\n      this.synth.stats.fps = Math.ceil(1000/this.timeSinceLastUpdate)\n      if(this.synth.update) {\n        try { this.synth.update(this.timeSinceLastUpdate) } catch (e) { console.log(e) }\n      }\n    //  console.log(this.synth.speed, this.synth.time)\n      for (let i = 0; i < this.s.length; i++) {\n        this.s[i].tick(this.synth.time)\n      }\n    //  console.log(this.canvas.width, this.canvas.height)\n      for (let i = 0; i < this.o.length; i++) {\n        this.o[i].tick({\n          time: this.synth.time,\n          mouse: this.synth.mouse,\n          bpm: this.synth.bpm,\n          resolution: [this.canvas.width, this.canvas.height]\n        })\n      }\n      if (this.isRenderingAll) {\n        this.renderAll({\n          tex0: this.o[0].getCurrent(),\n          tex1: this.o[1].getCurrent(),\n          tex2: this.o[2].getCurrent(),\n          tex3: this.o[3].getCurrent(),\n          resolution: [this.canvas.width, this.canvas.height]\n        })\n      } else {\n\n        this.renderFbo({\n          tex0: this.output.getCurrent(),\n          resolution: [this.canvas.width, this.canvas.height]\n        })\n      }\n      this.timeSinceLastUpdate = 0\n    }\n    if(this.saveFrame === true) {\n      this.canvasToImage()\n      this.saveFrame = false\n    }\n  //  this.regl.poll()\n  }\n\n\n}\n\nexport default HydraRenderer\n", "//const enumerateDevices = require('enumerate-devices')\n\nexport default function (deviceId) {\n  return navigator.mediaDevices.enumerateDevices()\n    .then(devices => devices.filter(devices => devices.kind === 'videoinput'))\n    .then(cameras => {\n      let constraints = { audio: false, video: true}\n      if (cameras[deviceId]) {\n        constraints['video'] = {\n          deviceId: { exact: cameras[deviceId].deviceId }\n        }\n      }\n    //  console.log(cameras)\n      return window.navigator.mediaDevices.getUserMedia(constraints)\n    })\n    .then(stream => {\n      const video = document.createElement('video')\n      video.setAttribute('autoplay', '')\n      video.setAttribute('muted', '')\n      video.setAttribute('playsinline', '')\n      //  video.src = window.URL.createObjectURL(stream)\n      video.srcObject = stream\n      return new Promise((resolve, reject) => {\n        video.addEventListener('loadedmetadata', () => {\n          video.play().then(() => resolve({video: video}))\n        })\n      })\n    })\n    .catch(console.log.bind(console))\n}\n", "\nexport default function (options) {\n  return new Promise(function(resolve, reject) {\n    //  async function startCapture(displayMediaOptions) {\n    navigator.mediaDevices.getDisplayMedia(options).then((stream) => {\n      const video = document.createElement('video')\n      video.srcObject = stream\n      video.addEventListener('loadedmetadata', () => {\n        video.play()\n        resolve({video: video})\n      })\n    }).catch((err) => reject(err))\n  })\n}\n", "import Webcam from './lib/webcam.js'\nimport Screen from './lib/screenmedia.js'\n\nclass HydraSource {\n  constructor ({ regl, width, height, pb, label = \"\"}) {\n    this.label = label\n    this.regl = regl\n    this.src = null\n    this.dynamic = true\n    this.width = width\n    this.height = height\n    this.tex = this.regl.texture({\n      //  shape: [width, height]\n      shape: [ 1, 1 ]\n    })\n    this.pb = pb\n  }\n\n  init (opts, params) {\n    if ('src' in opts) {\n      this.src = opts.src\n      this.tex = this.regl.texture({ data: this.src, ...params })\n    }\n    if ('dynamic' in opts) this.dynamic = opts.dynamic\n  }\n\n  initCam (index, params) {\n    const self = this\n    Webcam(index)\n      .then(response => {\n        self.src = response.video\n        self.dynamic = true\n        self.tex = self.regl.texture({ data: self.src, ...params })\n      })\n      .catch(err => console.log('could not get camera', err))\n  }\n\n  initVideo (url = '', params) {\n    // const self = this\n    const vid = document.createElement('video')\n    vid.crossOrigin = 'anonymous'\n    vid.autoplay = true\n    vid.loop = true\n    vid.muted = true // mute in order to load without user interaction\n    const onload = vid.addEventListener('loadeddata', () => {\n      this.src = vid\n      vid.play()\n      this.tex = this.regl.texture({ data: this.src, ...params})\n      this.dynamic = true\n    })\n    vid.src = url\n  }\n\n  initImage (url = '', params) {\n    const img = document.createElement('img')\n    img.crossOrigin = 'anonymous'\n    img.src = url\n    img.onload = () => {\n      this.src = img\n      this.dynamic = false\n      this.tex = this.regl.texture({ data: this.src, ...params})\n    }\n  }\n\n  initStream (streamName, params) {\n    //  console.log(\"initing stream!\", streamName)\n    let self = this\n    if (streamName && this.pb) {\n      this.pb.initSource(streamName)\n\n      this.pb.on('got video', function (nick, video) {\n        if (nick === streamName) {\n          self.src = video\n          self.dynamic = true\n          self.tex = self.regl.texture({ data: self.src, ...params})\n        }\n      })\n    }\n  }\n\n  // index only relevant in atom-hydra + desktop apps\n  initScreen (index = 0, params) {\n    const self = this\n    Screen()\n      .then(function (response) {\n        self.src = response.video\n        self.tex = self.regl.texture({ data: self.src, ...params})\n        self.dynamic = true\n        //  console.log(\"received screen input\")\n      })\n      .catch(err => console.log('could not get screen', err))\n  }\n\n  resize (width, height) {\n    this.width = width\n    this.height = height\n  }\n\n  clear () {\n    if (this.src && this.src.srcObject) {\n      if (this.src.srcObject.getTracks) {\n        this.src.srcObject.getTracks().forEach(track => track.stop())\n      }\n    }\n    this.src = null\n    this.tex = this.regl.texture({ shape: [ 1, 1 ] })\n  }\n\n  tick (time) {\n    //  console.log(this.src, this.tex.width, this.tex.height)\n    if (this.src !== null && this.dynamic === true) {\n      if (this.src.videoWidth && this.src.videoWidth !== this.tex.width) {\n        console.log(\n          this.src.videoWidth,\n          this.src.videoHeight,\n          this.tex.width,\n          this.tex.height\n        )\n        this.tex.resize(this.src.videoWidth, this.src.videoHeight)\n      }\n\n      if (this.src.width && this.src.width !== this.tex.width) {\n        this.tex.resize(this.src.width, this.src.height)\n      }\n\n      this.tex.subimage(this.src)\n    }\n  }\n\n  getTexture () {\n    return this.tex\n  }\n}\n\nexport default HydraSource\n", "// https://github.com/mikolalysenko/mouse-event\n\nconst mouse = {}\n\nfunction mouseButtons(ev) {\n  if(typeof ev === 'object') {\n    if('buttons' in ev) {\n      return ev.buttons\n    } else if('which' in ev) {\n      var b = ev.which\n      if(b === 2) {\n        return 4\n      } else if(b === 3) {\n        return 2\n      } else if(b > 0) {\n        return 1<<(b-1)\n      }\n    } else if('button' in ev) {\n      var b = ev.button\n      if(b === 1) {\n        return 4\n      } else if(b === 2) {\n        return 2\n      } else if(b >= 0) {\n        return 1<<b\n      }\n    }\n  }\n  return 0\n}\nmouse.buttons = mouseButtons\n\nfunction mouseElement(ev) {\n  return ev.target || ev.srcElement || window\n}\nmouse.element = mouseElement\n\nfunction mouseRelativeX(ev) {\n  if(typeof ev === 'object') {\n    if('pageX' in ev) {\n      return ev.pageX\n    }\n  }\n  return 0\n}\nmouse.x = mouseRelativeX\n\nfunction mouseRelativeY(ev) {\n  if(typeof ev === 'object') {\n    if('pageY' in ev) {\n      return ev.pageY\n    }\n  }\n  return 0\n}\nmouse.y = mouseRelativeY\n\nexport default mouse", "// based on https://github.com/mikolalysenko/mouse-change\n\nexport default mouseListen\n\nimport mouse from './mouse-event.js'\n\nfunction mouseListen (element, callback) {\n  if (!callback) {\n    callback = element\n    element = window\n  }\n\n  var buttonState = 0\n  var x = 0\n  var y = 0\n  var mods = {\n    shift: false,\n    alt: false,\n    control: false,\n    meta: false\n  }\n  var attached = false\n\n  function updateMods (ev) {\n    var changed = false\n    if ('altKey' in ev) {\n      changed = changed || ev.altKey !== mods.alt\n      mods.alt = !!ev.altKey\n    }\n    if ('shiftKey' in ev) {\n      changed = changed || ev.shiftKey !== mods.shift\n      mods.shift = !!ev.shiftKey\n    }\n    if ('ctrlKey' in ev) {\n      changed = changed || ev.ctrlKey !== mods.control\n      mods.control = !!ev.ctrlKey\n    }\n    if ('metaKey' in ev) {\n      changed = changed || ev.metaKey !== mods.meta\n      mods.meta = !!ev.metaKey\n    }\n    return changed\n  }\n\n  function handleEvent (nextButtons, ev) {\n    var nextX = mouse.x(ev)\n    var nextY = mouse.y(ev)\n    if ('buttons' in ev) {\n      nextButtons = ev.buttons | 0\n    }\n    if (nextButtons !== buttonState ||\n      nextX !== x ||\n      nextY !== y ||\n      updateMods(ev)) {\n      buttonState = nextButtons | 0\n      x = nextX || 0\n      y = nextY || 0\n      callback && callback(buttonState, x, y, mods)\n    }\n  }\n\n  function clearState (ev) {\n    handleEvent(0, ev)\n  }\n\n  function handleBlur () {\n    if (buttonState ||\n      x ||\n      y ||\n      mods.shift ||\n      mods.alt ||\n      mods.meta ||\n      mods.control) {\n      x = y = 0\n      buttonState = 0\n      mods.shift = mods.alt = mods.control = mods.meta = false\n      callback && callback(0, 0, 0, mods)\n    }\n  }\n\n  function handleMods (ev) {\n    if (updateMods(ev)) {\n      callback && callback(buttonState, x, y, mods)\n    }\n  }\n\n  function handleMouseMove (ev) {\n    if (mouse.buttons(ev) === 0) {\n      handleEvent(0, ev)\n    } else {\n      handleEvent(buttonState, ev)\n    }\n  }\n\n  function handleMouseDown (ev) {\n    handleEvent(buttonState | mouse.buttons(ev), ev)\n  }\n\n  function handleMouseUp (ev) {\n    handleEvent(buttonState & ~mouse.buttons(ev), ev)\n  }\n\n  function attachListeners () {\n    if (attached) {\n      return\n    }\n    attached = true\n\n    element.addEventListener('mousemove', handleMouseMove)\n\n    element.addEventListener('mousedown', handleMouseDown)\n\n    element.addEventListener('mouseup', handleMouseUp)\n\n    element.addEventListener('mouseleave', clearState)\n    element.addEventListener('mouseenter', clearState)\n    element.addEventListener('mouseout', clearState)\n    element.addEventListener('mouseover', clearState)\n\n    element.addEventListener('blur', handleBlur)\n\n    element.addEventListener('keyup', handleMods)\n    element.addEventListener('keydown', handleMods)\n    element.addEventListener('keypress', handleMods)\n\n    if (element !== window) {\n      window.addEventListener('blur', handleBlur)\n\n      window.addEventListener('keyup', handleMods)\n      window.addEventListener('keydown', handleMods)\n      window.addEventListener('keypress', handleMods)\n    }\n  }\n\n  function detachListeners () {\n    if (!attached) {\n      return\n    }\n    attached = false\n\n    element.removeEventListener('mousemove', handleMouseMove)\n\n    element.removeEventListener('mousedown', handleMouseDown)\n\n    element.removeEventListener('mouseup', handleMouseUp)\n\n    element.removeEventListener('mouseleave', clearState)\n    element.removeEventListener('mouseenter', clearState)\n    element.removeEventListener('mouseout', clearState)\n    element.removeEventListener('mouseover', clearState)\n\n    element.removeEventListener('blur', handleBlur)\n\n    element.removeEventListener('keyup', handleMods)\n    element.removeEventListener('keydown', handleMods)\n    element.removeEventListener('keypress', handleMods)\n\n    if (element !== window) {\n      window.removeEventListener('blur', handleBlur)\n\n      window.removeEventListener('keyup', handleMods)\n      window.removeEventListener('keydown', handleMods)\n      window.removeEventListener('keypress', handleMods)\n    }\n  }\n\n  // Attach listeners\n  attachListeners()\n\n  var result = {\n    element: element\n  }\n\n  Object.defineProperties(result, {\n    enabled: {\n      get: function () { return attached },\n      set: function (f) {\n        if (f) {\n          attachListeners()\n        } else {\n          detachListeners()\n        }\n      },\n      enumerable: true\n    },\n    buttons: {\n      get: function () { return buttonState },\n      enumerable: true\n    },\n    x: {\n      get: function () { return x },\n      enumerable: true\n    },\n    y: {\n      get: function () { return y },\n      enumerable: true\n    },\n    mods: {\n      get: function () { return mods },\n      enumerable: true\n    }\n  })\n\n  return result\n}\n", "import Meyda from 'meyda'\n\nclass Audio {\n  constructor ({\n    numBins = 4,\n    cutoff = 2,\n    smooth = 0.4,\n    max = 15,\n    scale = 10,\n    isDrawing = false,\n    parentEl = document.body\n  }) {\n    this.vol = 0\n    this.scale = scale\n    this.max = max\n    this.cutoff = cutoff\n    this.smooth = smooth\n    this.setBins(numBins)\n\n    // beat detection from: https://github.com/therewasaguy/p5-music-viz/blob/gh-pages/demos/01d_beat_detect_amplitude/sketch.js\n    this.beat = {\n      holdFrames: 20,\n      threshold: 40,\n      _cutoff: 0, // adaptive based on sound state\n      decay: 0.98,\n      _framesSinceBeat: 0 // keeps track of frames\n    }\n\n    this.onBeat = () => {\n    //  console.log(\"beat\")\n    }\n\n    this.canvas = document.createElement('canvas')\n    this.canvas.width = 100\n    this.canvas.height = 80\n    this.canvas.style.width = \"100px\"\n    this.canvas.style.height = \"80px\"\n    this.canvas.style.position = 'absolute'\n    this.canvas.style.right = '0px'\n    this.canvas.style.bottom = '0px'\n    parentEl.appendChild(this.canvas)\n\n    this.isDrawing = isDrawing\n    this.ctx = this.canvas.getContext('2d')\n    this.ctx.fillStyle=\"#DFFFFF\"\n    this.ctx.strokeStyle=\"#0ff\"\n    this.ctx.lineWidth=0.5\n    if(window.navigator.mediaDevices) {\n    window.navigator.mediaDevices.getUserMedia({video: false, audio: true})\n      .then((stream) => {\n      //  console.log('got mic stream', stream)\n        this.stream = stream\n        this.context = new AudioContext()\n        //  this.context = new AudioContext()\n        let audio_stream = this.context.createMediaStreamSource(stream)\n\n      //  console.log(this.context)\n        this.meyda = Meyda.createMeydaAnalyzer({\n          audioContext: this.context,\n          source: audio_stream,\n          featureExtractors: [\n            'loudness',\n            //  'perceptualSpread',\n            //  'perceptualSharpness',\n            //  'spectralCentroid'\n          ]\n        })\n      })\n      .catch((err) => console.log('ERROR', err))\n    }\n  }\n\n  detectBeat (level) {\n    //console.log(level,   this.beat._cutoff)\n    if (level > this.beat._cutoff && level > this.beat.threshold) {\n      this.onBeat()\n      this.beat._cutoff = level *1.2\n      this.beat._framesSinceBeat = 0\n    } else {\n      if (this.beat._framesSinceBeat <= this.beat.holdFrames){\n        this.beat._framesSinceBeat ++;\n      } else {\n        this.beat._cutoff *= this.beat.decay\n        this.beat._cutoff = Math.max(  this.beat._cutoff, this.beat.threshold);\n      }\n    }\n  }\n\n  tick() {\n   if(this.meyda){\n     var features = this.meyda.get()\n     if(features && features !== null){\n       this.vol = features.loudness.total\n       this.detectBeat(this.vol)\n       // reduce loudness array to number of bins\n       const reducer = (accumulator, currentValue) => accumulator + currentValue;\n       let spacing = Math.floor(features.loudness.specific.length/this.bins.length)\n       this.prevBins = this.bins.slice(0)\n       this.bins = this.bins.map((bin, index) => {\n         return features.loudness.specific.slice(index * spacing, (index + 1)*spacing).reduce(reducer)\n       }).map((bin, index) => {\n         // map to specified range\n\n        // return (bin * (1.0 - this.smooth) + this.prevBins[index] * this.smooth)\n          return (bin * (1.0 - this.settings[index].smooth) + this.prevBins[index] * this.settings[index].smooth)\n       })\n       // var y = this.canvas.height - scale*this.settings[index].cutoff\n       // this.ctx.beginPath()\n       // this.ctx.moveTo(index*spacing, y)\n       // this.ctx.lineTo((index+1)*spacing, y)\n       // this.ctx.stroke()\n       //\n       // var yMax = this.canvas.height - scale*(this.settings[index].scale + this.settings[index].cutoff)\n       this.fft = this.bins.map((bin, index) => (\n        // Math.max(0, (bin - this.cutoff) / (this.max - this.cutoff))\n         Math.max(0, (bin - this.settings[index].cutoff)/this.settings[index].scale)\n       ))\n       if(this.isDrawing) this.draw()\n     }\n   }\n  }\n\n  setCutoff (cutoff) {\n    this.cutoff = cutoff\n    this.settings = this.settings.map((el) => {\n      el.cutoff = cutoff\n      return el\n    })\n  }\n\n  setSmooth (smooth) {\n    this.smooth = smooth\n    this.settings = this.settings.map((el) => {\n      el.smooth = smooth\n      return el\n    })\n  }\n\n  setBins (numBins) {\n    this.bins = Array(numBins).fill(0)\n    this.prevBins = Array(numBins).fill(0)\n    this.fft = Array(numBins).fill(0)\n    this.settings = Array(numBins).fill(0).map(() => ({\n      cutoff: this.cutoff,\n      scale: this.scale,\n      smooth: this.smooth\n    }))\n    // to do: what to do in non-global mode?\n    this.bins.forEach((bin, index) => {\n      window['a' + index] = (scale = 1, offset = 0) => () => (a.fft[index] * scale + offset)\n    })\n  //  console.log(this.settings)\n  }\n\n  setScale(scale){\n    this.scale = scale\n    this.settings = this.settings.map((el) => {\n      el.scale = scale\n      return el\n    })\n  }\n\n  setMax(max) {\n    this.max = max\n    console.log('set max is deprecated')\n  }\n  hide() {\n    this.isDrawing = false\n    this.canvas.style.display = 'none'\n  }\n\n  show() {\n    this.isDrawing = true\n    this.canvas.style.display = 'block'\n\n  }\n\n  draw () {\n    this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height)\n    var spacing = this.canvas.width / this.bins.length\n    var scale = this.canvas.height / (this.max * 2)\n  //  console.log(this.bins)\n    this.bins.forEach((bin, index) => {\n\n      var height = bin * scale\n\n     this.ctx.fillRect(index * spacing, this.canvas.height - height, spacing, height)\n\n  //   console.log(this.settings[index])\n     var y = this.canvas.height - scale*this.settings[index].cutoff\n     this.ctx.beginPath()\n     this.ctx.moveTo(index*spacing, y)\n     this.ctx.lineTo((index+1)*spacing, y)\n     this.ctx.stroke()\n\n     var yMax = this.canvas.height - scale*(this.settings[index].scale + this.settings[index].cutoff)\n     this.ctx.beginPath()\n     this.ctx.moveTo(index*spacing, yMax)\n     this.ctx.lineTo((index+1)*spacing, yMax)\n     this.ctx.stroke()\n    })\n\n\n    /*var y = this.canvas.height - scale*this.cutoff\n    this.ctx.beginPath()\n    this.ctx.moveTo(0, y)\n    this.ctx.lineTo(this.canvas.width, y)\n    this.ctx.stroke()\n    var yMax = this.canvas.height - scale*this.max\n    this.ctx.beginPath()\n    this.ctx.moveTo(0, yMax)\n    this.ctx.lineTo(this.canvas.width, yMax)\n    this.ctx.stroke()*/\n  }\n}\n\nexport default Audio\n", "class VideoRecorder {\n  constructor(stream) {\n    this.mediaSource = new MediaSource()\n    this.stream = stream\n\n    // testing using a recording as input\n    this.output = document.createElement('video')\n    this.output.autoplay = true\n    this.output.loop = true\n\n    let self = this\n    this.mediaSource.addEventListener('sourceopen', () => {\n      console.log('MediaSource opened');\n      self.sourceBuffer = self.mediaSource.addSourceBuffer('video/webm; codecs=\"vp8\"');\n      console.log('Source buffer: ', sourceBuffer);\n    })\n  }\n\n  start() {\n  //  let options = {mimeType: 'video/webm'};\n\n//   let options = {mimeType: 'video/webm;codecs=h264'};\n   let options = {mimeType: 'video/webm;codecs=vp9'};\n\n    this.recordedBlobs = []\n    try {\n     this.mediaRecorder = new MediaRecorder(this.stream, options)\n    } catch (e0) {\n     console.log('Unable to create MediaRecorder with options Object: ', e0)\n     try {\n       options = {mimeType: 'video/webm,codecs=vp9'}\n       this.mediaRecorder = new MediaRecorder(this.stream, options)\n     } catch (e1) {\n       console.log('Unable to create MediaRecorder with options Object: ', e1)\n       try {\n         options = 'video/vp8' // Chrome 47\n         this.mediaRecorder = new MediaRecorder(this.stream, options)\n       } catch (e2) {\n         alert('MediaRecorder is not supported by this browser.\\n\\n' +\n           'Try Firefox 29 or later, or Chrome 47 or later, ' +\n           'with Enable experimental Web Platform features enabled from chrome://flags.')\n         console.error('Exception while creating MediaRecorder:', e2)\n         return\n       }\n     }\n   }\n   console.log('Created MediaRecorder', this.mediaRecorder, 'with options', options);\n   this.mediaRecorder.onstop = this._handleStop.bind(this)\n   this.mediaRecorder.ondataavailable = this._handleDataAvailable.bind(this)\n   this.mediaRecorder.start(100) // collect 100ms of data\n   console.log('MediaRecorder started', this.mediaRecorder)\n }\n\n  \n   stop(){\n     this.mediaRecorder.stop()\n   }\n\n _handleStop() {\n   //const superBuffer = new Blob(recordedBlobs, {type: 'video/webm'})\n   // const blob = new Blob(this.recordedBlobs, {type: 'video/webm;codecs=h264'})\n  const blob = new Blob(this.recordedBlobs, {type: this.mediaRecorder.mimeType})\n   const url = window.URL.createObjectURL(blob)\n   this.output.src = url\n\n    const a = document.createElement('a')\n    a.style.display = 'none'\n    a.href = url\n    let d = new Date()\n    a.download = `hydra-${d.getFullYear()}-${d.getMonth() + 1}-${d.getDate()}-${d.getHours()}.${d.getMinutes()}.${d.getSeconds()}.webm`\n    document.body.appendChild(a)\n    a.click()\n    setTimeout(() => {\n      document.body.removeChild(a);\n      window.URL.revokeObjectURL(url);\n    }, 300);\n  }\n\n  _handleDataAvailable(event) {\n    if (event.data && event.data.size > 0) {\n      this.recordedBlobs.push(event.data);\n    }\n  }\n}\n\nexport default VideoRecorder\n", "// from https://gist.github.com/gre/1650294\n\nexport default {\n  // no easing, no acceleration\n  linear: function (t) { return t },\n  // accelerating from zero velocity\n  easeInQuad: function (t) { return t*t },\n  // decelerating to zero velocity\n  easeOutQuad: function (t) { return t*(2-t) },\n  // acceleration until halfway, then deceleration\n  easeInOutQuad: function (t) { return t<.5 ? 2*t*t : -1+(4-2*t)*t },\n  // accelerating from zero velocity\n  easeInCubic: function (t) { return t*t*t },\n  // decelerating to zero velocity\n  easeOutCubic: function (t) { return (--t)*t*t+1 },\n  // acceleration until halfway, then deceleration\n  easeInOutCubic: function (t) { return t<.5 ? 4*t*t*t : (t-1)*(2*t-2)*(2*t-2)+1 },\n  // accelerating from zero velocity\n  easeInQuart: function (t) { return t*t*t*t },\n  // decelerating to zero velocity\n  easeOutQuart: function (t) { return 1-(--t)*t*t*t },\n  // acceleration until halfway, then deceleration\n  easeInOutQuart: function (t) { return t<.5 ? 8*t*t*t*t : 1-8*(--t)*t*t*t },\n  // accelerating from zero velocity\n  easeInQuint: function (t) { return t*t*t*t*t },\n  // decelerating to zero velocity\n  easeOutQuint: function (t) { return 1+(--t)*t*t*t*t },\n  // acceleration until halfway, then deceleration\n  easeInOutQuint: function (t) { return t<.5 ? 16*t*t*t*t*t : 1+16*(--t)*t*t*t*t },\n  // sin shape\n  sin: function (t) { return (1 + Math.sin(Math.PI*t-Math.PI/2))/2 }\n}\n", "// WIP utils for working with arrays\n// Possibly should be integrated with lfo extension, etc.\n// to do: transform time rather than array values, similar to working with coordinates in hydra\n\nimport easing from './easing-functions.js'\n\nvar map = (num, in_min, in_max, out_min, out_max) => {\n  return (num - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;\n}\n\nexport default {\n  init: () => {\n\n    Array.prototype.fast = function(speed = 1) {\n      this._speed = speed\n      return this\n    }\n\n    Array.prototype.smooth = function(smooth = 1) {\n      this._smooth = smooth\n      return this\n    }\n\n    Array.prototype.ease = function(ease = 'linear') {\n      if (typeof ease == 'function') {\n        this._smooth = 1\n        this._ease = ease\n      }\n      else if (easing[ease]){\n        this._smooth = 1\n        this._ease = easing[ease]\n      }\n      return this\n    }\n\n    Array.prototype.offset = function(offset = 0.5) {\n      this._offset = offset%1.0\n      return this\n    }\n\n    // Array.prototype.bounce = function() {\n    //   this.modifiers.bounce = true\n    //   return this\n    // }\n\n    Array.prototype.fit = function(low = 0, high =1) {\n      let lowest = Math.min(...this)\n      let highest =  Math.max(...this)\n      var newArr = this.map((num) => map(num, lowest, highest, low, high))\n      newArr._speed = this._speed\n      newArr._smooth = this._smooth\n      newArr._ease = this._ease\n      return newArr\n    }\n  },\n\n  getValue: (arr = []) => ({time, bpm}) =>{\n    let speed = arr._speed ? arr._speed : 1\n    let smooth = arr._smooth ? arr._smooth : 0\n    let index = time * speed * (bpm / 60) + (arr._offset || 0)\n\n    if (smooth!==0) {\n      let ease = arr._ease ? arr._ease : easing['linear']\n      let _index = index - (smooth / 2)\n      let currValue = arr[Math.floor(_index % (arr.length))]\n      let nextValue = arr[Math.floor((_index + 1) % (arr.length))]\n      let t = Math.min((_index%1)/smooth,1)\n      return ease(t) * (nextValue - currValue) + currValue\n    }\n    else {\n      const val = arr[Math.floor(index % (arr.length))]\n      return arr[Math.floor(index % (arr.length))]\n    }\n  }\n}\n", "// attempt custom evaluation sandbox for hydra functions\n// for now, just avoids polluting the global namespace\n// should probably be replaced with an abstract syntax tree\n\nexport default (parent) => {\n  var initialCode = ``\n\n  var sandbox = createSandbox(initialCode)\n\n  var addToContext = (name, object) => {\n    initialCode += `\n      var ${name} = ${object}\n    `\n    sandbox = createSandbox(initialCode)\n  }\n\n\n  return {\n    addToContext: addToContext,\n    eval: (code) => sandbox.eval(code)\n  }\n\n  function createSandbox (initial) {\n    globalThis.eval(initial)\n    // optional params\n    var localEval = function (code)  {\n      globalThis.eval(code)\n    }\n\n    // API/data for end-user\n    return {\n      eval: localEval\n    }\n  }\n}\n", "// handles code evaluation and attaching relevant objects to global and evaluation contexts\n\nimport Sandbox from './lib/sandbox.js'\nimport ArrayUtils from './lib/array-utils.js'\n\nclass EvalSandbox {\n  constructor(parent, makeGlobal, userProps = []) {\n    this.makeGlobal = makeGlobal\n    this.sandbox = Sandbox(parent)\n    this.parent = parent\n    var properties = Object.keys(parent)\n    properties.forEach((property) => this.add(property))\n    this.userProps = userProps\n  }\n\n  add(name) {\n    if(this.makeGlobal) window[name] = this.parent[name]\n    // this.sandbox.addToContext(name, `parent.${name}`)\n  }\n\n// sets on window as well as synth object if global (not needed for objects, which can be set directly)\n\n  set(property, value) {\n    if(this.makeGlobal) {\n      window[property] = value\n    }\n    this.parent[property] = value\n  }\n\n  tick() {\n    if(this.makeGlobal) {\n      this.userProps.forEach((property) => {\n        this.parent[property] = window[property]\n      })\n      //  this.parent.speed = window.speed\n    } else {\n\n    }\n  }\n\n  eval(code) {\n    this.sandbox.eval(code)\n  }\n}\n\nexport default EvalSandbox\n", "import arrayUtils from './lib/array-utils.js'\n\n// [WIP] how to treat different dimensions (?)\nconst DEFAULT_CONVERSIONS = {\n  float: {\n    'vec4': { name: 'sum', args: [[1, 1, 1, 1]] },\n    'vec2': { name: 'sum', args: [[1, 1]] }\n  }\n}\n\nfunction fillArrayWithDefaults(arr, len) {\n  // fill the array with default values if it's too short\n  while (arr.length < len) {\n    if (arr.length === 3) { // push a 1 as the default for .a in vec4\n      arr.push(1.0)\n    } else {\n      arr.push(0.0)\n    }\n  }\n  return arr.slice(0, len)\n}\n\nconst ensure_decimal_dot = (val) => {\n  val = val.toString()\n  if (val.indexOf('.') < 0) {\n    val += '.'\n  }\n  return val\n}\n\n\n\nexport default function formatArguments(transform, startIndex, synthContext) {\n  const defaultArgs = transform.transform.inputs\n  const userArgs = transform.userArgs\n  const { generators } = transform.synth\n  const { src } = generators // depends on synth having src() function\n  return defaultArgs.map((input, index) => {\n    const typedArg = {\n      value: input.default,\n      type: input.type, //\n      isUniform: false,\n      name: input.name,\n      vecLen: 0\n      //  generateGlsl: null // function for creating glsl\n    }\n\n    if (typedArg.type === 'float') typedArg.value = ensure_decimal_dot(input.default)\n    if (input.type.startsWith('vec')) {\n      try {\n        typedArg.vecLen = Number.parseInt(input.type.substr(3))\n      } catch (e) {\n        console.log(`Error determining length of vector input type ${input.type} (${input.name})`)\n      }\n    }\n\n    // if user has input something for this argument\n    if (userArgs.length > index) {\n      typedArg.value = userArgs[index]\n      // do something if a composite or transform\n\n      if (typeof userArgs[index] === 'function') {\n        // if (typedArg.vecLen > 0) { // expected input is a vector, not a scalar\n        //    typedArg.value = (context, props, batchId) => (fillArrayWithDefaults(userArgs[index](props), typedArg.vecLen))\n        // } else {\n        typedArg.value = (context, props, batchId) => {\n          try {\n            const val = userArgs[index](props)\n            if(typeof val === 'number') {\n              return val\n            } else {\n              console.warn('function does not return a number', userArgs[index])\n            }\n            return input.default\n          } catch (e) {\n            console.warn('ERROR', e)\n            return input.default\n          }\n        }\n        //  }\n\n        typedArg.isUniform = true\n      } else if (userArgs[index].constructor === Array) {\n        //   if (typedArg.vecLen > 0) { // expected input is a vector, not a scalar\n        //     typedArg.isUniform = true\n        //     typedArg.value = fillArrayWithDefaults(typedArg.value, typedArg.vecLen)\n        //  } else {\n        //  console.log(\"is Array\")\n        // filter out values that are not a number\n       // const filteredArray = userArgs[index].filter((val) => typeof val === 'number')\n       // typedArg.value = (context, props, batchId) => arrayUtils.getValue(filteredArray)(props)\n       typedArg.value = (context, props, batchId) => arrayUtils.getValue(userArgs[index])(props)\n       typedArg.isUniform = true\n        // }\n      } \n    }\n\n    if (startIndex < 0) {\n    } else {\n      if (typedArg.value && typedArg.value.transforms) {\n        const final_transform = typedArg.value.transforms[typedArg.value.transforms.length - 1]\n\n        if (final_transform.transform.glsl_return_type !== input.type) {\n          const defaults = DEFAULT_CONVERSIONS[input.type]\n          if (typeof defaults !== 'undefined') {\n            const default_def = defaults[final_transform.transform.glsl_return_type]\n            if (typeof default_def !== 'undefined') {\n              const { name, args } = default_def\n              typedArg.value = typedArg.value[name](...args)\n            }\n          }\n        }\n\n        typedArg.isUniform = false\n      } else if (typedArg.type === 'float' && typeof typedArg.value === 'number') {\n        typedArg.value = ensure_decimal_dot(typedArg.value)\n      } else if (typedArg.type.startsWith('vec') && typeof typedArg.value === 'object' && Array.isArray(typedArg.value)) {\n        typedArg.isUniform = false\n        typedArg.value = `${typedArg.type}(${typedArg.value.map(ensure_decimal_dot).join(', ')})`\n      } else if (input.type === 'sampler2D') {\n        // typedArg.tex = typedArg.value\n        var x = typedArg.value\n        typedArg.value = () => (x.getTexture())\n        typedArg.isUniform = true\n      } else {\n        // if passing in a texture reference, when function asks for vec4, convert to vec4\n        if (typedArg.value.getTexture && input.type === 'vec4') {\n          var x1 = typedArg.value\n          typedArg.value = src(x1)\n          typedArg.isUniform = false\n        }\n      }\n\n      // add tp uniform array if is a function that will pass in a different value on each render frame,\n      // or a texture/ external source\n\n      if (typedArg.isUniform) {\n        typedArg.name += startIndex\n        //  shaderParams.uniforms.push(typedArg)\n      }\n    }\n    return typedArg\n  })\n}\n\n", "import formatArguments from './format-arguments.js'\n\n// Add extra functionality to Array.prototype for generating sequences in time\nimport arrayUtils from './lib/array-utils.js'\n\n\n\n// converts a tree of javascript functions to a shader\nexport default function (transforms) {\n    var shaderParams = {\n      uniforms: [], // list of uniforms used in shader\n      glslFunctions: [], // list of functions used in shader\n      fragColor: ''\n    }\n\n    var gen = generateGlsl(transforms, shaderParams)('st')\n    shaderParams.fragColor = gen\n    // remove uniforms with duplicate names\n    let uniforms = {}\n    shaderParams.uniforms.forEach((uniform) => uniforms[uniform.name] = uniform)\n    shaderParams.uniforms = Object.values(uniforms)\n    return shaderParams\n\n}\n\n\n// recursive function for generating shader string from object containing functions and user arguments. Order of functions in string depends on type of function\n// to do: improve variable names\nfunction generateGlsl (transforms, shaderParams) {\n  // transform function that outputs a shader string corresponding to gl_FragColor\n  var fragColor = () => ''\n  // var uniforms = []\n  // var glslFunctions = []\n  transforms.forEach((transform) => {\n    var inputs = formatArguments(transform, shaderParams.uniforms.length)\n    inputs.forEach((input) => {\n      if(input.isUniform) shaderParams.uniforms.push(input)\n    })\n\n    // add new glsl function to running list of functions\n    if(!contains(transform, shaderParams.glslFunctions)) shaderParams.glslFunctions.push(transform)\n\n    // current function for generating frag color shader code\n    var f0 = fragColor\n    if (transform.transform.type === 'src') {\n      fragColor = (uv) => `${shaderString(uv, transform.name, inputs, shaderParams)}`\n    } else if (transform.transform.type === 'coord') {\n      fragColor = (uv) => `${f0(`${shaderString(uv, transform.name, inputs, shaderParams)}`)}`\n    } else if (transform.transform.type === 'color') {\n      fragColor = (uv) =>  `${shaderString(`${f0(uv)}`, transform.name, inputs, shaderParams)}`\n    } else if (transform.transform.type === 'combine') {\n      // combining two generated shader strings (i.e. for blend, mult, add funtions)\n      var f1 = inputs[0].value && inputs[0].value.transforms ?\n      (uv) => `${generateGlsl(inputs[0].value.transforms, shaderParams)(uv)}` :\n      (inputs[0].isUniform ? () => inputs[0].name : () => inputs[0].value)\n      fragColor = (uv) => `${shaderString(`${f0(uv)}, ${f1(uv)}`, transform.name, inputs.slice(1), shaderParams)}`\n    } else if (transform.transform.type === 'combineCoord') {\n      // combining two generated shader strings (i.e. for modulate functions)\n      var f1 = inputs[0].value && inputs[0].value.transforms ?\n      (uv) => `${generateGlsl(inputs[0].value.transforms, shaderParams)(uv)}` :\n      (inputs[0].isUniform ? () => inputs[0].name : () => inputs[0].value)\n      fragColor = (uv) => `${f0(`${shaderString(`${uv}, ${f1(uv)}`, transform.name, inputs.slice(1), shaderParams)}`)}`\n\n\n    }\n  })\n//  console.log(fragColor)\n  //  break;\n  return fragColor\n}\n\n// assembles a shader string containing the arguments and the function name, i.e. 'osc(uv, frequency)'\nfunction shaderString (uv, method, inputs, shaderParams) {\n  const str = inputs.map((input) => {\n    if (input.isUniform) {\n      return input.name\n    } else if (input.value && input.value.transforms) {\n      // this by definition needs to be a generator, hence we start with 'st' as the initial value for generating the glsl fragment\n      return `${generateGlsl(input.value.transforms, shaderParams)('st')}`\n    }\n    return input.value\n  }).reduce((p, c) => `${p}, ${c}`, '')\n\n  return `${method}(${uv}${str})`\n}\n\n// merge two arrays and remove duplicates\nfunction mergeArrays (a, b) {\n  return a.concat(b.filter(function (item) {\n    return a.indexOf(item) < 0;\n  }))\n}\n\n// check whether array\nfunction contains(object, arr) {\n  for(var i = 0; i < arr.length; i++){\n    if(object.name == arr[i].name) return true\n  }\n  return false\n}\n\n\n\n", "// functions that are only used within other functions\n\nexport default {\n  _luminance: {\n    type: 'util',\n    glsl: `float _luminance(vec3 rgb){\n      const vec3 W = vec3(0.2125, 0.7154, 0.0721);\n      return dot(rgb, W);\n    }`\n  },\n  _noise: {\n    type: 'util',\n    glsl: `\n    //\tSimplex 3D Noise\n    //\tby Ian McEwan, Ashima Arts\n    vec4 permute(vec4 x){return mod(((x*34.0)+1.0)*x, 289.0);}\n  vec4 taylorInvSqrt(vec4 r){return 1.79284291400159 - 0.85373472095314 * r;}\n\n  float _noise(vec3 v){\n    const vec2  C = vec2(1.0/6.0, 1.0/3.0) ;\n    const vec4  D = vec4(0.0, 0.5, 1.0, 2.0);\n\n  // First corner\n    vec3 i  = floor(v + dot(v, C.yyy) );\n    vec3 x0 =   v - i + dot(i, C.xxx) ;\n\n  // Other corners\n    vec3 g = step(x0.yzx, x0.xyz);\n    vec3 l = 1.0 - g;\n    vec3 i1 = min( g.xyz, l.zxy );\n    vec3 i2 = max( g.xyz, l.zxy );\n\n    //  x0 = x0 - 0. + 0.0 * C\n    vec3 x1 = x0 - i1 + 1.0 * C.xxx;\n    vec3 x2 = x0 - i2 + 2.0 * C.xxx;\n    vec3 x3 = x0 - 1. + 3.0 * C.xxx;\n\n  // Permutations\n    i = mod(i, 289.0 );\n    vec4 p = permute( permute( permute(\n               i.z + vec4(0.0, i1.z, i2.z, 1.0 ))\n             + i.y + vec4(0.0, i1.y, i2.y, 1.0 ))\n             + i.x + vec4(0.0, i1.x, i2.x, 1.0 ));\n\n  // Gradients\n  // ( N*N points uniformly over a square, mapped onto an octahedron.)\n    float n_ = 1.0/7.0; // N=7\n    vec3  ns = n_ * D.wyz - D.xzx;\n\n    vec4 j = p - 49.0 * floor(p * ns.z *ns.z);  //  mod(p,N*N)\n\n    vec4 x_ = floor(j * ns.z);\n    vec4 y_ = floor(j - 7.0 * x_ );    // mod(j,N)\n\n    vec4 x = x_ *ns.x + ns.yyyy;\n    vec4 y = y_ *ns.x + ns.yyyy;\n    vec4 h = 1.0 - abs(x) - abs(y);\n\n    vec4 b0 = vec4( x.xy, y.xy );\n    vec4 b1 = vec4( x.zw, y.zw );\n\n    vec4 s0 = floor(b0)*2.0 + 1.0;\n    vec4 s1 = floor(b1)*2.0 + 1.0;\n    vec4 sh = -step(h, vec4(0.0));\n\n    vec4 a0 = b0.xzyw + s0.xzyw*sh.xxyy ;\n    vec4 a1 = b1.xzyw + s1.xzyw*sh.zzww ;\n\n    vec3 p0 = vec3(a0.xy,h.x);\n    vec3 p1 = vec3(a0.zw,h.y);\n    vec3 p2 = vec3(a1.xy,h.z);\n    vec3 p3 = vec3(a1.zw,h.w);\n\n  //Normalise gradients\n    vec4 norm = taylorInvSqrt(vec4(dot(p0,p0), dot(p1,p1), dot(p2, p2), dot(p3,p3)));\n    p0 *= norm.x;\n    p1 *= norm.y;\n    p2 *= norm.z;\n    p3 *= norm.w;\n\n  // Mix final noise value\n    vec4 m = max(0.6 - vec4(dot(x0,x0), dot(x1,x1), dot(x2,x2), dot(x3,x3)), 0.0);\n    m = m * m;\n    return 42.0 * dot( m*m, vec4( dot(p0,x0), dot(p1,x1),\n                                  dot(p2,x2), dot(p3,x3) ) );\n  }\n    `\n  },\n\n\n  _rgbToHsv: {\n    type: 'util',\n    glsl: `vec3 _rgbToHsv(vec3 c){\n            vec4 K = vec4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);\n            vec4 p = mix(vec4(c.bg, K.wz), vec4(c.gb, K.xy), step(c.b, c.g));\n            vec4 q = mix(vec4(p.xyw, c.r), vec4(c.r, p.yzx), step(p.x, c.r));\n\n            float d = q.x - min(q.w, q.y);\n            float e = 1.0e-10;\n            return vec3(abs(q.z + (q.w - q.y) / (6.0 * d + e)), d / (q.x + e), q.x);\n        }`\n  },\n  _hsvToRgb: {\n    type: 'util',\n    glsl: `vec3 _hsvToRgb(vec3 c){\n        vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);\n        vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);\n        return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);\n    }`\n  }\n}\n", "import generateGlsl from './generate-glsl.js'\n// const formatArguments = require('./glsl-utils.js').formatArguments\n\n// const glslTransforms = require('./glsl/composable-glsl-functions.js')\nimport utilityGlsl from './glsl/utility-functions.js'\n\nvar GlslSource = function (obj) {\n  this.transforms = []\n  this.transforms.push(obj)\n  this.defaultOutput = obj.defaultOutput\n  this.synth = obj.synth\n  this.type = 'GlslSource'\n  this.defaultUniforms = obj.defaultUniforms\n  return this\n}\n\nGlslSource.prototype.addTransform = function (obj)  {\n    this.transforms.push(obj)\n}\n\nGlslSource.prototype.out = function (_output) {\n  var output = _output || this.defaultOutput\n  var glsl = this.glsl(output)\n  this.synth.currentFunctions = []\n // output.renderPasses(glsl)\n  if(output) try{\n    output.render(glsl)\n  } catch (error) {\n    console.log('shader could not compile', error)\n  }\n}\n\nGlslSource.prototype.glsl = function () {\n  //var output = _output || this.defaultOutput\n  var self = this\n  // uniforms included in all shaders\n//  this.defaultUniforms = output.uniforms\n  var passes = []\n  var transforms = []\n//  console.log('output', output)\n  this.transforms.forEach((transform) => {\n    if(transform.transform.type === 'renderpass'){\n      // if (transforms.length > 0) passes.push(this.compile(transforms, output))\n      // transforms = []\n      // var uniforms = {}\n      // const inputs = formatArguments(transform, -1)\n      // inputs.forEach((uniform) => { uniforms[uniform.name] = uniform.value })\n      //\n      // passes.push({\n      //   frag: transform.transform.frag,\n      //   uniforms: Object.assign({}, self.defaultUniforms, uniforms)\n      // })\n      // transforms.push({name: 'prev', transform:  glslTransforms['prev'], synth: this.synth})\n      console.warn('no support for renderpass')\n    } else {\n      transforms.push(transform)\n    }\n  })\n\n  if (transforms.length > 0) passes.push(this.compile(transforms))\n\n  return passes\n}\n\nGlslSource.prototype.compile = function (transforms) {\n  var shaderInfo = generateGlsl(transforms, this.synth)\n  var uniforms = {}\n  shaderInfo.uniforms.forEach((uniform) => { uniforms[uniform.name] = uniform.value })\n\n  var frag = `\n  precision ${this.defaultOutput.precision} float;\n  ${Object.values(shaderInfo.uniforms).map((uniform) => {\n    let type = uniform.type\n    switch (uniform.type) {\n      case 'texture':\n        type = 'sampler2D'\n        break\n    }\n    return `\n      uniform ${type} ${uniform.name};`\n  }).join('')}\n  uniform float time;\n  uniform vec2 resolution;\n  varying vec2 uv;\n  uniform sampler2D prevBuffer;\n\n  ${Object.values(utilityGlsl).map((transform) => {\n  //  console.log(transform.glsl)\n    return `\n            ${transform.glsl}\n          `\n  }).join('')}\n\n  ${shaderInfo.glslFunctions.map((transform) => {\n    return `\n            ${transform.transform.glsl}\n          `\n  }).join('')}\n\n  void main () {\n    vec4 c = vec4(1, 0, 0, 1);\n    vec2 st = gl_FragCoord.xy/resolution.xy;\n    gl_FragColor = ${shaderInfo.fragColor};\n  }\n  `\n\n  return {\n    frag: frag,\n    uniforms: Object.assign({}, this.defaultUniforms, uniforms)\n  }\n\n}\n\nexport default GlslSource\n", "/*\nFormat for adding functions to hydra. For each entry in this file, hydra automatically generates a glsl function and javascript function with the same name. You can also ass functions dynamically using setFunction(object).\n\n{\n  name: 'osc', // name that will be used to access function in js as well as in glsl\n  type: 'src', // can be 'src', 'color', 'combine', 'combineCoords'. see below for more info\n  inputs: [\n    {\n      name: 'freq',\n      type: 'float',\n      default: 0.2\n    },\n    {\n      name: 'sync',\n      type: 'float',\n      default: 0.1\n    },\n    {\n      name: 'offset',\n      type: 'float',\n      default: 0.0\n    }\n  ],\n    glsl: `\n      vec2 st = _st;\n      float r = sin((st.x-offset*2/freq+time*sync)*freq)*0.5  + 0.5;\n      float g = sin((st.x+time*sync)*freq)*0.5 + 0.5;\n      float b = sin((st.x+offset/freq+time*sync)*freq)*0.5  + 0.5;\n      return vec4(r, g, b, 1.0);\n   `\n}\n\n// The above code generates the glsl function:\n`vec4 osc(vec2 _st, float freq, float sync, float offset){\n vec2 st = _st;\n float r = sin((st.x-offset*2/freq+time*sync)*freq)*0.5  + 0.5;\n float g = sin((st.x+time*sync)*freq)*0.5 + 0.5;\n float b = sin((st.x+offset/freq+time*sync)*freq)*0.5  + 0.5;\n return vec4(r, g, b, 1.0);\n}`\n\n\nTypes and default arguments for hydra functions.\nThe value in the 'type' field lets the parser know which type the function will be returned as well as default arguments.\n\nconst types = {\n  'src': {\n    returnType: 'vec4',\n    args: ['vec2 _st']\n  },\n  'coord': {\n    returnType: 'vec2',\n    args: ['vec2 _st']\n  },\n  'color': {\n    returnType: 'vec4',\n    args: ['vec4 _c0']\n  },\n  'combine': {\n    returnType: 'vec4',\n    args: ['vec4 _c0', 'vec4 _c1']\n  },\n  'combineCoord': {\n    returnType: 'vec2',\n    args: ['vec2 _st', 'vec4 _c0']\n  }\n}\n\n*/\n\nexport default () => [\n  {\n  name: 'noise',\n  type: 'src',\n  inputs: [\n    {\n      type: 'float',\n      name: 'scale',\n      default: 10,\n    },\n{\n      type: 'float',\n      name: 'offset',\n      default: 0.1,\n    }\n  ],\n  glsl:\n`   return vec4(vec3(_noise(vec3(_st*scale, offset*time))), 1.0);`\n},\n{\n  name: 'voronoi',\n  type: 'src',\n  inputs: [\n    {\n      type: 'float',\n      name: 'scale',\n      default: 5,\n    },\n{\n      type: 'float',\n      name: 'speed',\n      default: 0.3,\n    },\n{\n      type: 'float',\n      name: 'blending',\n      default: 0.3,\n    }\n  ],\n  glsl:\n`   vec3 color = vec3(.0);\n   // Scale\n   _st *= scale;\n   // Tile the space\n   vec2 i_st = floor(_st);\n   vec2 f_st = fract(_st);\n   float m_dist = 10.;  // minimun distance\n   vec2 m_point;        // minimum point\n   for (int j=-1; j<=1; j++ ) {\n   for (int i=-1; i<=1; i++ ) {\n   vec2 neighbor = vec2(float(i),float(j));\n   vec2 p = i_st + neighbor;\n   vec2 point = fract(sin(vec2(dot(p,vec2(127.1,311.7)),dot(p,vec2(269.5,183.3))))*43758.5453);\n   point = 0.5 + 0.5*sin(time*speed + 6.2831*point);\n   vec2 diff = neighbor + point - f_st;\n   float dist = length(diff);\n   if( dist < m_dist ) {\n   m_dist = dist;\n   m_point = point;\n   }\n   }\n   }\n   // Assign a color using the closest point position\n   color += dot(m_point,vec2(.3,.6));\n   color *= 1.0 - blending*m_dist;\n   return vec4(color, 1.0);`\n},\n{\n  name: 'osc',\n  type: 'src',\n  inputs: [\n    {\n      type: 'float',\n      name: 'frequency',\n      default: 60,\n    },\n{\n      type: 'float',\n      name: 'sync',\n      default: 0.1,\n    },\n{\n      type: 'float',\n      name: 'offset',\n      default: 0,\n    }\n  ],\n  glsl:\n`   vec2 st = _st;\n   float r = sin((st.x-offset/frequency+time*sync)*frequency)*0.5  + 0.5;\n   float g = sin((st.x+time*sync)*frequency)*0.5 + 0.5;\n   float b = sin((st.x+offset/frequency+time*sync)*frequency)*0.5  + 0.5;\n   return vec4(r, g, b, 1.0);`\n},\n{\n  name: 'shape',\n  type: 'src',\n  inputs: [\n    {\n      type: 'float',\n      name: 'sides',\n      default: 3,\n    },\n{\n      type: 'float',\n      name: 'radius',\n      default: 0.3,\n    },\n{\n      type: 'float',\n      name: 'smoothing',\n      default: 0.01,\n    }\n  ],\n  glsl:\n`   vec2 st = _st * 2. - 1.;\n   // Angle and radius from the current pixel\n   float a = atan(st.x,st.y)+3.1416;\n   float r = (2.*3.1416)/sides;\n   float d = cos(floor(.5+a/r)*r-a)*length(st);\n   return vec4(vec3(1.0-smoothstep(radius,radius + smoothing + 0.0000001,d)), 1.0);`\n},\n{\n  name: 'gradient',\n  type: 'src',\n  inputs: [\n    {\n      type: 'float',\n      name: 'speed',\n      default: 0,\n    }\n  ],\n  glsl:\n`   return vec4(_st, sin(time*speed), 1.0);`\n},\n{\n  name: 'src',\n  type: 'src',\n  inputs: [\n    {\n      type: 'sampler2D',\n      name: 'tex',\n      default: NaN,\n    }\n  ],\n  glsl:\n`   //  vec2 uv = gl_FragCoord.xy/vec2(1280., 720.);\n   return texture2D(tex, fract(_st));`\n},\n{\n  name: 'solid',\n  type: 'src',\n  inputs: [\n    {\n      type: 'float',\n      name: 'r',\n      default: 0,\n    },\n{\n      type: 'float',\n      name: 'g',\n      default: 0,\n    },\n{\n      type: 'float',\n      name: 'b',\n      default: 0,\n    },\n{\n      type: 'float',\n      name: 'a',\n      default: 1,\n    }\n  ],\n  glsl:\n`   return vec4(r, g, b, a);`\n},\n{\n  name: 'rotate',\n  type: 'coord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'angle',\n      default: 10,\n    },\n{\n      type: 'float',\n      name: 'speed',\n      default: 0,\n    }\n  ],\n  glsl:\n`   vec2 xy = _st - vec2(0.5);\n   float ang = angle + speed *time;\n   xy = mat2(cos(ang),-sin(ang), sin(ang),cos(ang))*xy;\n   xy += 0.5;\n   return xy;`\n},\n{\n  name: 'scale',\n  type: 'coord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'amount',\n      default: 1.5,\n    },\n{\n      type: 'float',\n      name: 'xMult',\n      default: 1,\n    },\n{\n      type: 'float',\n      name: 'yMult',\n      default: 1,\n    },\n{\n      type: 'float',\n      name: 'offsetX',\n      default: 0.5,\n    },\n{\n      type: 'float',\n      name: 'offsetY',\n      default: 0.5,\n    }\n  ],\n  glsl:\n`   vec2 xy = _st - vec2(offsetX, offsetY);\n   xy*=(1.0/vec2(amount*xMult, amount*yMult));\n   xy+=vec2(offsetX, offsetY);\n   return xy;\n   `\n},\n{\n  name: 'pixelate',\n  type: 'coord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'pixelX',\n      default: 20,\n    },\n{\n      type: 'float',\n      name: 'pixelY',\n      default: 20,\n    }\n  ],\n  glsl:\n`   vec2 xy = vec2(pixelX, pixelY);\n   return (floor(_st * xy) + 0.5)/xy;`\n},\n{\n  name: 'posterize',\n  type: 'color',\n  inputs: [\n    {\n      type: 'float',\n      name: 'bins',\n      default: 3,\n    },\n{\n      type: 'float',\n      name: 'gamma',\n      default: 0.6,\n    }\n  ],\n  glsl:\n`   vec4 c2 = pow(_c0, vec4(gamma));\n   c2 *= vec4(bins);\n   c2 = floor(c2);\n   c2/= vec4(bins);\n   c2 = pow(c2, vec4(1.0/gamma));\n   return vec4(c2.xyz, _c0.a);`\n},\n{\n  name: 'shift',\n  type: 'color',\n  inputs: [\n    {\n      type: 'float',\n      name: 'r',\n      default: 0.5,\n    },\n{\n      type: 'float',\n      name: 'g',\n      default: 0,\n    },\n{\n      type: 'float',\n      name: 'b',\n      default: 0,\n    },\n{\n      type: 'float',\n      name: 'a',\n      default: 0,\n    }\n  ],\n  glsl:\n`   vec4 c2 = vec4(_c0);\n   c2.r = fract(c2.r + r);\n   c2.g = fract(c2.g + g);\n   c2.b = fract(c2.b + b);\n   c2.a = fract(c2.a + a);\n   return vec4(c2.rgba);`\n},\n{\n  name: 'repeat',\n  type: 'coord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'repeatX',\n      default: 3,\n    },\n{\n      type: 'float',\n      name: 'repeatY',\n      default: 3,\n    },\n{\n      type: 'float',\n      name: 'offsetX',\n      default: 0,\n    },\n{\n      type: 'float',\n      name: 'offsetY',\n      default: 0,\n    }\n  ],\n  glsl:\n`   vec2 st = _st * vec2(repeatX, repeatY);\n   st.x += step(1., mod(st.y,2.0)) * offsetX;\n   st.y += step(1., mod(st.x,2.0)) * offsetY;\n   return fract(st);`\n},\n{\n  name: 'modulateRepeat',\n  type: 'combineCoord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'repeatX',\n      default: 3,\n    },\n{\n      type: 'float',\n      name: 'repeatY',\n      default: 3,\n    },\n{\n      type: 'float',\n      name: 'offsetX',\n      default: 0.5,\n    },\n{\n      type: 'float',\n      name: 'offsetY',\n      default: 0.5,\n    }\n  ],\n  glsl:\n`   vec2 st = _st * vec2(repeatX, repeatY);\n   st.x += step(1., mod(st.y,2.0)) + _c0.r * offsetX;\n   st.y += step(1., mod(st.x,2.0)) + _c0.g * offsetY;\n   return fract(st);`\n},\n{\n  name: 'repeatX',\n  type: 'coord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'reps',\n      default: 3,\n    },\n{\n      type: 'float',\n      name: 'offset',\n      default: 0,\n    }\n  ],\n  glsl:\n`   vec2 st = _st * vec2(reps, 1.0);\n   //  float f =  mod(_st.y,2.0);\n   st.y += step(1., mod(st.x,2.0))* offset;\n   return fract(st);`\n},\n{\n  name: 'modulateRepeatX',\n  type: 'combineCoord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'reps',\n      default: 3,\n    },\n{\n      type: 'float',\n      name: 'offset',\n      default: 0.5,\n    }\n  ],\n  glsl:\n`   vec2 st = _st * vec2(reps, 1.0);\n   //  float f =  mod(_st.y,2.0);\n   st.y += step(1., mod(st.x,2.0)) + _c0.r * offset;\n   return fract(st);`\n},\n{\n  name: 'repeatY',\n  type: 'coord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'reps',\n      default: 3,\n    },\n{\n      type: 'float',\n      name: 'offset',\n      default: 0,\n    }\n  ],\n  glsl:\n`   vec2 st = _st * vec2(1.0, reps);\n   //  float f =  mod(_st.y,2.0);\n   st.x += step(1., mod(st.y,2.0))* offset;\n   return fract(st);`\n},\n{\n  name: 'modulateRepeatY',\n  type: 'combineCoord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'reps',\n      default: 3,\n    },\n{\n      type: 'float',\n      name: 'offset',\n      default: 0.5,\n    }\n  ],\n  glsl:\n`   vec2 st = _st * vec2(reps, 1.0);\n   //  float f =  mod(_st.y,2.0);\n   st.x += step(1., mod(st.y,2.0)) + _c0.r * offset;\n   return fract(st);`\n},\n{\n  name: 'kaleid',\n  type: 'coord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'nSides',\n      default: 4,\n    }\n  ],\n  glsl:\n`   vec2 st = _st;\n   st -= 0.5;\n   float r = length(st);\n   float a = atan(st.y, st.x);\n   float pi = 2.*3.1416;\n   a = mod(a,pi/nSides);\n   a = abs(a-pi/nSides/2.);\n   return r*vec2(cos(a), sin(a));`\n},\n{\n  name: 'modulateKaleid',\n  type: 'combineCoord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'nSides',\n      default: 4,\n    }\n  ],\n  glsl:\n`   vec2 st = _st - 0.5;\n   float r = length(st);\n   float a = atan(st.y, st.x);\n   float pi = 2.*3.1416;\n   a = mod(a,pi/nSides);\n   a = abs(a-pi/nSides/2.);\n   return (_c0.r+r)*vec2(cos(a), sin(a));`\n},\n{\n  name: 'scroll',\n  type: 'coord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'scrollX',\n      default: 0.5,\n    },\n{\n      type: 'float',\n      name: 'scrollY',\n      default: 0.5,\n    },\n{\n      type: 'float',\n      name: 'speedX',\n      default: 0,\n    },\n{\n      type: 'float',\n      name: 'speedY',\n      default: 0,\n    }\n  ],\n  glsl:\n`\n   _st.x += scrollX + time*speedX;\n   _st.y += scrollY + time*speedY;\n   return fract(_st);`\n},\n{\n  name: 'scrollX',\n  type: 'coord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'scrollX',\n      default: 0.5,\n    },\n{\n      type: 'float',\n      name: 'speed',\n      default: 0,\n    }\n  ],\n  glsl:\n`   _st.x += scrollX + time*speed;\n   return fract(_st);`\n},\n{\n  name: 'modulateScrollX',\n  type: 'combineCoord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'scrollX',\n      default: 0.5,\n    },\n{\n      type: 'float',\n      name: 'speed',\n      default: 0,\n    }\n  ],\n  glsl:\n`   _st.x += _c0.r*scrollX + time*speed;\n   return fract(_st);`\n},\n{\n  name: 'scrollY',\n  type: 'coord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'scrollY',\n      default: 0.5,\n    },\n{\n      type: 'float',\n      name: 'speed',\n      default: 0,\n    }\n  ],\n  glsl:\n`   _st.y += scrollY + time*speed;\n   return fract(_st);`\n},\n{\n  name: 'modulateScrollY',\n  type: 'combineCoord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'scrollY',\n      default: 0.5,\n    },\n{\n      type: 'float',\n      name: 'speed',\n      default: 0,\n    }\n  ],\n  glsl:\n`   _st.y += _c0.r*scrollY + time*speed;\n   return fract(_st);`\n},\n{\n  name: 'add',\n  type: 'combine',\n  inputs: [\n    {\n      type: 'float',\n      name: 'amount',\n      default: 1,\n    }\n  ],\n  glsl:\n`   return (_c0+_c1)*amount + _c0*(1.0-amount);`\n},\n{\n  name: 'sub',\n  type: 'combine',\n  inputs: [\n    {\n      type: 'float',\n      name: 'amount',\n      default: 1,\n    }\n  ],\n  glsl:\n`   return (_c0-_c1)*amount + _c0*(1.0-amount);`\n},\n{\n  name: 'layer',\n  type: 'combine',\n  inputs: [\n\n  ],\n  glsl:\n`   return vec4(mix(_c0.rgb, _c1.rgb, _c1.a), clamp(_c0.a + _c1.a, 0.0, 1.0));`\n},\n{\n  name: 'blend',\n  type: 'combine',\n  inputs: [\n    {\n      type: 'float',\n      name: 'amount',\n      default: 0.5,\n    }\n  ],\n  glsl:\n`   return _c0*(1.0-amount)+_c1*amount;`\n},\n{\n  name: 'mult',\n  type: 'combine',\n  inputs: [\n    {\n      type: 'float',\n      name: 'amount',\n      default: 1,\n    }\n  ],\n  glsl:\n`   return _c0*(1.0-amount)+(_c0*_c1)*amount;`\n},\n{\n  name: 'diff',\n  type: 'combine',\n  inputs: [\n\n  ],\n  glsl:\n`   return vec4(abs(_c0.rgb-_c1.rgb), max(_c0.a, _c1.a));`\n},\n{\n  name: 'modulate',\n  type: 'combineCoord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'amount',\n      default: 0.1,\n    }\n  ],\n  glsl:\n`   //  return fract(st+(_c0.xy-0.5)*amount);\n   return _st + _c0.xy*amount;`\n},\n{\n  name: 'modulateScale',\n  type: 'combineCoord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'multiple',\n      default: 1,\n    },\n{\n      type: 'float',\n      name: 'offset',\n      default: 1,\n    }\n  ],\n  glsl:\n`   vec2 xy = _st - vec2(0.5);\n   xy*=(1.0/vec2(offset + multiple*_c0.r, offset + multiple*_c0.g));\n   xy+=vec2(0.5);\n   return xy;`\n},\n{\n  name: 'modulatePixelate',\n  type: 'combineCoord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'multiple',\n      default: 10,\n    },\n{\n      type: 'float',\n      name: 'offset',\n      default: 3,\n    }\n  ],\n  glsl:\n`   vec2 xy = vec2(offset + _c0.x*multiple, offset + _c0.y*multiple);\n   return (floor(_st * xy) + 0.5)/xy;`\n},\n{\n  name: 'modulateRotate',\n  type: 'combineCoord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'multiple',\n      default: 1,\n    },\n{\n      type: 'float',\n      name: 'offset',\n      default: 0,\n    }\n  ],\n  glsl:\n`   vec2 xy = _st - vec2(0.5);\n   float angle = offset + _c0.x * multiple;\n   xy = mat2(cos(angle),-sin(angle), sin(angle),cos(angle))*xy;\n   xy += 0.5;\n   return xy;`\n},\n{\n  name: 'modulateHue',\n  type: 'combineCoord',\n  inputs: [\n    {\n      type: 'float',\n      name: 'amount',\n      default: 1,\n    }\n  ],\n  glsl:\n`   return _st + (vec2(_c0.g - _c0.r, _c0.b - _c0.g) * amount * 1.0/resolution);`\n},\n{\n  name: 'invert',\n  type: 'color',\n  inputs: [\n    {\n      type: 'float',\n      name: 'amount',\n      default: 1,\n    }\n  ],\n  glsl:\n`   return vec4((1.0-_c0.rgb)*amount + _c0.rgb*(1.0-amount), _c0.a);`\n},\n{\n  name: 'contrast',\n  type: 'color',\n  inputs: [\n    {\n      type: 'float',\n      name: 'amount',\n      default: 1.6,\n    }\n  ],\n  glsl:\n`   vec4 c = (_c0-vec4(0.5))*vec4(amount) + vec4(0.5);\n   return vec4(c.rgb, _c0.a);`\n},\n{\n  name: 'brightness',\n  type: 'color',\n  inputs: [\n    {\n      type: 'float',\n      name: 'amount',\n      default: 0.4,\n    }\n  ],\n  glsl:\n`   return vec4(_c0.rgb + vec3(amount), _c0.a);`\n},\n{\n  name: 'mask',\n  type: 'combine',\n  inputs: [\n\n  ],\n  glsl:\n  `   float a = _luminance(_c1.rgb);\n  return vec4(_c0.rgb*a, a*_c0.a);`\n},\n\n{\n  name: 'luma',\n  type: 'color',\n  inputs: [\n    {\n      type: 'float',\n      name: 'threshold',\n      default: 0.5,\n    },\n{\n      type: 'float',\n      name: 'tolerance',\n      default: 0.1,\n    }\n  ],\n  glsl:\n`   float a = smoothstep(threshold-(tolerance+0.0000001), threshold+(tolerance+0.0000001), _luminance(_c0.rgb));\n   return vec4(_c0.rgb*a, a);`\n},\n{\n  name: 'thresh',\n  type: 'color',\n  inputs: [\n    {\n      type: 'float',\n      name: 'threshold',\n      default: 0.5,\n    },\n{\n      type: 'float',\n      name: 'tolerance',\n      default: 0.04,\n    }\n  ],\n  glsl:\n`   return vec4(vec3(smoothstep(threshold-(tolerance+0.0000001), threshold+(tolerance+0.0000001), _luminance(_c0.rgb))), _c0.a);`\n},\n{\n  name: 'color',\n  type: 'color',\n  inputs: [\n    {\n      type: 'float',\n      name: 'r',\n      default: 1,\n    },\n{\n      type: 'float',\n      name: 'g',\n      default: 1,\n    },\n{\n      type: 'float',\n      name: 'b',\n      default: 1,\n    },\n{\n      type: 'float',\n      name: 'a',\n      default: 1,\n    }\n  ],\n  glsl:\n`   vec4 c = vec4(r, g, b, a);\n   vec4 pos = step(0.0, c); // detect whether negative\n   // if > 0, return r * _c0\n   // if < 0 return (1.0-r) * _c0\n   return vec4(mix((1.0-_c0)*abs(c), c*_c0, pos));`\n},\n{\n  name: 'saturate',\n  type: 'color',\n  inputs: [\n    {\n      type: 'float',\n      name: 'amount',\n      default: 2,\n    }\n  ],\n  glsl:\n`   const vec3 W = vec3(0.2125, 0.7154, 0.0721);\n   vec3 intensity = vec3(dot(_c0.rgb, W));\n   return vec4(mix(intensity, _c0.rgb, amount), _c0.a);`\n},\n{\n  name: 'hue',\n  type: 'color',\n  inputs: [\n    {\n      type: 'float',\n      name: 'hue',\n      default: 0.4,\n    }\n  ],\n  glsl:\n`   vec3 c = _rgbToHsv(_c0.rgb);\n   c.r += hue;\n   //  c.r = fract(c.r);\n   return vec4(_hsvToRgb(c), _c0.a);`\n},\n{\n  name: 'colorama',\n  type: 'color',\n  inputs: [\n    {\n      type: 'float',\n      name: 'amount',\n      default: 0.005,\n    }\n  ],\n  glsl:\n`   vec3 c = _rgbToHsv(_c0.rgb);\n   c += vec3(amount);\n   c = _hsvToRgb(c);\n   c = fract(c);\n   return vec4(c, _c0.a);`\n},\n{\n  name: 'prev',\n  type: 'src',\n  inputs: [\n\n  ],\n  glsl:\n`   return texture2D(prevBuffer, fract(_st));`\n},\n{\n  name: 'sum',\n  type: 'color',\n  inputs: [\n    {\n      type: 'vec4',\n      name: 'scale',\n      default: 1,\n    }\n  ],\n  glsl:\n`   vec4 v = _c0 * s;\n   return v.r + v.g + v.b + v.a;\n   }\n   float sum(vec2 _st, vec4 s) { // vec4 is not a typo, because argument type is not overloaded\n   vec2 v = _st.xy * s.xy;\n   return v.x + v.y;`\n},\n{\n  name: 'r',\n  type: 'color',\n  inputs: [\n    {\n      type: 'float',\n      name: 'scale',\n      default: 1,\n    },\n{\n      type: 'float',\n      name: 'offset',\n      default: 0,\n    }\n  ],\n  glsl:\n`   return vec4(_c0.r * scale + offset);`\n},\n{\n  name: 'g',\n  type: 'color',\n  inputs: [\n    {\n      type: 'float',\n      name: 'scale',\n      default: 1,\n    },\n{\n      type: 'float',\n      name: 'offset',\n      default: 0,\n    }\n  ],\n  glsl:\n`   return vec4(_c0.g * scale + offset);`\n},\n{\n  name: 'b',\n  type: 'color',\n  inputs: [\n    {\n      type: 'float',\n      name: 'scale',\n      default: 1,\n    },\n{\n      type: 'float',\n      name: 'offset',\n      default: 0,\n    }\n  ],\n  glsl:\n`   return vec4(_c0.b * scale + offset);`\n},\n{\n  name: 'a',\n  type: 'color',\n  inputs: [\n    {\n      type: 'float',\n      name: 'scale',\n      default: 1,\n    },\n{\n      type: 'float',\n      name: 'offset',\n      default: 0,\n    }\n  ],\n  glsl:\n`   return vec4(_c0.a * scale + offset);`\n}\n]\n", "import GlslSource from './glsl-source.js'\nimport glslFunctions from './glsl/glsl-functions.js'\n\nclass GeneratorFactory {\n  constructor ({\n      defaultUniforms,\n      defaultOutput,\n      extendTransforms = [],\n      changeListener = (() => {})\n    } = {}\n    ) {\n    this.defaultOutput = defaultOutput\n    this.defaultUniforms = defaultUniforms\n    this.changeListener = changeListener\n    this.extendTransforms = extendTransforms\n    this.generators = {}\n    this.init()\n  }\n  init () {\n    const functions = glslFunctions()\n    this.glslTransforms = {}\n    this.generators = Object.entries(this.generators).reduce((prev, [method, transform]) => {\n      this.changeListener({type: 'remove', synth: this, method})\n      return prev\n    }, {})\n\n    this.sourceClass = (() => {\n      return class extends GlslSource {\n      }\n    })()\n\n    \n\n    // add user definied transforms\n    if (Array.isArray(this.extendTransforms)) {\n      functions.concat(this.extendTransforms)\n    } else if (typeof this.extendTransforms === 'object' && this.extendTransforms.type) {\n      functions.push(this.extendTransforms)\n    }\n\n    return functions.map((transform) => this.setFunction(transform))\n }\n\n _addMethod (method, transform) {\n    const self = this\n    this.glslTransforms[method] = transform\n    if (transform.type === 'src') {\n      const func = (...args) => new this.sourceClass({\n        name: method,\n        transform: transform,\n        userArgs: args,\n        defaultOutput: this.defaultOutput,\n        defaultUniforms: this.defaultUniforms,\n        synth: self\n      })\n      this.generators[method] = func\n      this.changeListener({type: 'add', synth: this, method})\n      return func\n    } else  {\n      this.sourceClass.prototype[method] = function (...args) {\n        this.transforms.push({name: method, transform: transform, userArgs: args, synth: self})\n        return this\n      }\n    }\n    return undefined\n  }\n\n  setFunction(obj) {\n    var processedGlsl = processGlsl(obj)\n    if(processedGlsl) this._addMethod(obj.name, processedGlsl)\n  }\n}\n\nconst typeLookup = {\n  'src': {\n    returnType: 'vec4',\n    args: ['vec2 _st']\n  },\n  'coord': {\n    returnType: 'vec2',\n    args: ['vec2 _st']\n  },\n  'color': {\n    returnType: 'vec4',\n    args: ['vec4 _c0']\n  },\n  'combine': {\n    returnType: 'vec4',\n    args: ['vec4 _c0', 'vec4 _c1']\n  },\n  'combineCoord': {\n    returnType: 'vec2',\n    args: ['vec2 _st', 'vec4 _c0']\n  }\n}\n// expects glsl of format\n// {\n//   name: 'osc', // name that will be used to access function as well as within glsl\n//   type: 'src', // can be src: vec4(vec2 _st), coord: vec2(vec2 _st), color: vec4(vec4 _c0), combine: vec4(vec4 _c0, vec4 _c1), combineCoord: vec2(vec2 _st, vec4 _c0)\n//   inputs: [\n//     {\n//       name: 'freq',\n//       type: 'float', // 'float'   //, 'texture', 'vec4'\n//       default: 0.2\n//     },\n//     {\n//           name: 'sync',\n//           type: 'float',\n//           default: 0.1\n//         },\n//         {\n//           name: 'offset',\n//           type: 'float',\n//           default: 0.0\n//         }\n//   ],\n   //  glsl: `\n   //    vec2 st = _st;\n   //    float r = sin((st.x-offset*2/freq+time*sync)*freq)*0.5  + 0.5;\n   //    float g = sin((st.x+time*sync)*freq)*0.5 + 0.5;\n   //    float b = sin((st.x+offset/freq+time*sync)*freq)*0.5  + 0.5;\n   //    return vec4(r, g, b, 1.0);\n   // `\n// }\n\n// // generates glsl function:\n// `vec4 osc(vec2 _st, float freq, float sync, float offset){\n//  vec2 st = _st;\n//  float r = sin((st.x-offset*2/freq+time*sync)*freq)*0.5  + 0.5;\n//  float g = sin((st.x+time*sync)*freq)*0.5 + 0.5;\n//  float b = sin((st.x+offset/freq+time*sync)*freq)*0.5  + 0.5;\n//  return vec4(r, g, b, 1.0);\n// }`\n\nfunction processGlsl(obj) {\n  let t = typeLookup[obj.type]\n  if(t) {\n  let baseArgs = t.args.map((arg) => arg).join(\", \")\n  // @todo: make sure this works for all input types, add validation\n  let customArgs = obj.inputs.map((input) => `${input.type} ${input.name}`).join(', ')\n  let args = `${baseArgs}${customArgs.length > 0 ? ', '+ customArgs: ''}`\n//  console.log('args are ', args)\n\n    let glslFunction =\n`\n  ${t.returnType} ${obj.name}(${args}) {\n      ${obj.glsl}\n  }\n`\n\n  // add extra input to beginning for backward combatibility @todo update compiler so this is no longer necessary\n    if(obj.type === 'combine' || obj.type === 'combineCoord') obj.inputs.unshift({\n        name: 'color',\n        type: 'vec4'\n      })\n    return Object.assign({}, obj, { glsl: glslFunction})\n  } else {\n    console.warn(`type ${obj.type} not recognized`, obj)\n  }\n\n}\n\nexport default GeneratorFactory\n", "window.global ||= window;\nimport Hydra from \"hydra-synth\";\n\nif (document.getElementById(\"index-hydra\")) {\n  const isReduced = !!(\n    window.matchMedia(\"(prefers-reduced-motion: reduce)\") === true\n    || window.matchMedia(\"(prefers-reduced-motion: reduce)\").matches === true\n  );\n\n  const toggle = document.getElementById(\"toggle-hydra\");\n\n  // create a new hydra-synth instance\n  window.hydra = new Hydra({\n    canvas: document.getElementById(\"index-hydra\"),\n    detectAudio: false,\n    makeGlobal: false,\n  }).synth;\n\n  //Glitch River\n  //Flor de Fuego\n  //https://flordefuego.github.io/\n  window.play = function() {\n    window.hydra\n      .voronoi(8, 1)\n      .mult(\n        window.hydra\n          .osc(10, 0.1, () => Math.sin(window.hydra.time) * 3)\n          .saturate(3)\n          .kaleid(200)\n      )\n      .modulate(window.hydra.o0, 0.5)\n      .add(window.hydra.o0, 0.8)\n      .scrollY(-0.01)\n      .scale(0.99)\n      .modulate(window.hydra.voronoi(8, 1), 0.008)\n      .luma(0.3)\n      .out();\n\n    const content = toggle.innerText;\n\n    toggle.innerText = toggle.dataset.content;\n    toggle.dataset.content = content;\n    toggle.dataset.state = \"play\";\n  }\n\n  window.stop = function() {\n    window.hydra.solid(0, 0, 0).out();\n\n    const content = toggle.innerText;\n\n    toggle.innerText = toggle.dataset.content;\n    toggle.dataset.content = content;\n    toggle.dataset.state = \"pause\";\n  }\n\n  isReduced ? window.stop() : window.play();\n\n  toggle.addEventListener(\"click\", function(event) {\n    event.preventDefault();\n\n    toggle.dataset.state == \"play\" ? window.stop() : window.play();\n  });\n}\n"],
  "mappings": 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"hydra_synth_default", "isReduced", "toggle", "hydra_synth_default", "content", "event"]
}