text: 
  
  // The Module object: Our interface to the outside world. We import
  // and export values on it. There are various ways Module can be used:
  // 1. Not defined. We create it here
  // 2. A function parameter, function(Module) { ..generated code.. }
  // 3. pre-run appended it, var Module = {}; ..generated code..
  // 4. External script tag defines var Module.
  // We need to check if Module already exists (e.g. case 3 above).
  // Substitution will be replaced with actual code on later stage of the build,
  // this way Closure Compiler will not mangle it (e.g. case 4. above).
  // Note that if you want to run closure, and also to use Module
  // after the generated code, you will need to define   var Module = {};
  // before the code. Then that object will be used in the code, and you
  // can continue to use Module afterwards as well.
  var Module = typeof Module !== 'undefined' ? Module : {};
  
  
  
  // --pre-jses are emitted after the Module integration code, so that they can
  // refer to Module (if they choose; they can also define Module)
  // {{PRE_JSES}}
  
  // Sometimes an existing Module object exists with properties
  // meant to overwrite the default module functionality. Here
  // we collect those properties and reapply _after_ we configure
  // the current environment's defaults to avoid having to be so
  // defensive during initialization.
  var moduleOverrides = {};
  var key;
  for (key in Module) {
    if (Module.hasOwnProperty(key)) {
      moduleOverrides[key] = Module[key];
    }
  }
  
  var arguments_ = [];
  var thisProgram = './this.program';
  var quit_ = function(status, toThrow) {
    throw toThrow;
  };
  
  // Determine the runtime environment we are in. You can customize this by
  // setting the ENVIRONMENT setting at compile time (see settings.js).
  
  var ENVIRONMENT_IS_WEB = false;
  var ENVIRONMENT_IS_WORKER = false;
  var ENVIRONMENT_IS_NODE = false;
  var ENVIRONMENT_IS_SHELL = false;
  ENVIRONMENT_IS_WEB = typeof window === 'object';
  ENVIRONMENT_IS_WORKER = typeof importScripts === 'function';
  // N.b. Electron.js environment is simultaneously a NODE-environment, but
  // also a web environment.
  ENVIRONMENT_IS_NODE = typeof process === 'object' && typeof process.versions === 'object' && typeof process.versions.node === 'string';
  ENVIRONMENT_IS_SHELL = !ENVIRONMENT_IS_WEB && !ENVIRONMENT_IS_NODE && !ENVIRONMENT_IS_WORKER;
  
  
  
  
  // `/` should be present at the end if `scriptDirectory` is not empty
  var scriptDirectory = '';
  function locateFile(path) {
    if (Module['locateFile']) {
      return Module['locateFile'](path, scriptDirectory);
    }
    return scriptDirectory + path;
  }
  
  // Hooks that are implemented differently in different runtime environments.
  var read_,
      readAsync,
      readBinary,
      setWindowTitle;
  
  var nodeFS;
  var nodePath;
  
  if (ENVIRONMENT_IS_NODE) {
    if (ENVIRONMENT_IS_WORKER) {
      scriptDirectory = require('path').dirname(scriptDirectory) + '/';
    } else {
      scriptDirectory = __dirname + '/';
    }
  
  
  
  
    read_ = function shell_read(filename, binary) {
      if (!nodeFS) nodeFS = require('fs');
      if (!nodePath) nodePath = require('path');
      filename = nodePath['normalize'](filename);
      return nodeFS['readFileSync'](filename, binary ? null : 'utf8');
    };
  
    readBinary = function readBinary(filename) {
      var ret = read_(filename, true);
      if (!ret.buffer) {
        ret = new Uint8Array(ret);
      }
      assert(ret.buffer);
      return ret;
    };
  
  
  
  
    if (process['argv'].length > 1) {
      thisProgram = process['argv'][1].replace(/\\/g, '/');
    }
  
    arguments_ = process['argv'].slice(2);
  
    if (typeof module !== 'undefined') {
      module['exports'] = Module;
    }
  
    process['on']('uncaughtException', function(ex) {
      // suppress ExitStatus exceptions from showing an error
      if (!(ex instanceof ExitStatus)) {
        throw ex;
      }
    });
  
    process['on']('unhandledRejection', abort);
  
    quit_ = function(status) {
      process['exit'](status);
    };
  
    Module['inspect'] = function () { return '[Emscripten Module object]'; };
  
  
  
  } else
  if (ENVIRONMENT_IS_SHELL) {
  
  
    if (typeof read != 'undefined') {
      read_ = function shell_read(f) {
        return read(f);
      };
    }
  
    readBinary = function readBinary(f) {
      var data;
      if (typeof readbuffer === 'function') {
        return new Uint8Array(readbuffer(f));
      }
      data = read(f, 'binary');
      assert(typeof data === 'object');
      return data;
    };
  
    if (typeof scriptArgs != 'undefined') {
      arguments_ = scriptArgs;
    } else if (typeof arguments != 'undefined') {
      arguments_ = arguments;
    }
  
    if (typeof quit === 'function') {
      quit_ = function(status) {
        quit(status);
      };
    }
  
    if (typeof print !== 'undefined') {
      // Prefer to use print/printErr where they exist, as they usually work better.
      if (typeof console === 'undefined') console = /** @type{!Console} */({});
      console.log = /** @type{!function(this:Console, ...*): undefined} */ (print);
      console.warn = console.error = /** @type{!function(this:Console, ...*): undefined} */ (typeof printErr !== 'undefined' ? printErr : print);
    }
  
  
  } else
  
  // Note that this includes Node.js workers when relevant (pthreads is enabled).
  // Node.js workers are detected as a combination of ENVIRONMENT_IS_WORKER and
  // ENVIRONMENT_IS_NODE.
  if (ENVIRONMENT_IS_WEB || ENVIRONMENT_IS_WORKER) {
    if (ENVIRONMENT_IS_WORKER) { // Check worker, not web, since window could be polyfilled
      scriptDirectory = self.location.href;
    } else if (document.currentScript) { // web
      scriptDirectory = document.currentScript.src;
    }
    // blob urls look like blob:http://site.com/etc/etc and we cannot infer anything from them.
    // otherwise, slice off the final part of the url to find the script directory.
    // if scriptDirectory does not contain a slash, lastIndexOf will return -1,
    // and scriptDirectory will correctly be replaced with an empty string.
    if (scriptDirectory.indexOf('blob:') !== 0) {
      scriptDirectory = scriptDirectory.substr(0, scriptDirectory.lastIndexOf('/')+1);
    } else {
      scriptDirectory = '';
    }
  
  
    // Differentiate the Web Worker from the Node Worker case, as reading must
    // be done differently.
    {
  
  
  
  
    read_ = function shell_read(url) {
        var xhr = new XMLHttpRequest();
        xhr.open('GET', url, false);
        xhr.send(null);
        return xhr.responseText;
    };
  
    if (ENVIRONMENT_IS_WORKER) {
      readBinary = function readBinary(url) {
          var xhr = new XMLHttpRequest();
          xhr.open('GET', url, false);
          xhr.responseType = 'arraybuffer';
          xhr.send(null);
          return new Uint8Array(/** @type{!ArrayBuffer} */(xhr.response));
      };
    }
  
    readAsync = function readAsync(url, onload, onerror) {
      var xhr = new XMLHttpRequest();
      xhr.open('GET', url, true);
      xhr.responseType = 'arraybuffer';
      xhr.onload = function xhr_onload() {
        if (xhr.status == 200 || (xhr.status == 0 && xhr.response)) { // file URLs can return 0
          onload(xhr.response);
          return;
        }
        onerror();
      };
      xhr.onerror = onerror;
      xhr.send(null);
    };
  
  
  
  
    }
  
    setWindowTitle = function(title) { document.title = title };
  } else
  {
  }
  
  
  // Set up the out() and err() hooks, which are how we can print to stdout or
  // stderr, respectively.
  var out = Module['print'] || console.log.bind(console);
  var err = Module['printErr'] || console.warn.bind(console);
  
  // Merge back in the overrides
  for (key in moduleOverrides) {
    if (moduleOverrides.hasOwnProperty(key)) {
      Module[key] = moduleOverrides[key];
    }
  }
  // Free the object hierarchy contained in the overrides, this lets the GC
  // reclaim data used e.g. in memoryInitializerRequest, which is a large typed array.
  moduleOverrides = null;
  
  // Emit code to handle expected values on the Module object. This applies Module.x
  // to the proper local x. This has two benefits: first, we only emit it if it is
  // expected to arrive, and second, by using a local everywhere else that can be
  // minified.
  if (Module['arguments']) arguments_ = Module['arguments'];
  if (Module['thisProgram']) thisProgram = Module['thisProgram'];
  if (Module['quit']) quit_ = Module['quit'];
  
  // perform assertions in shell.js after we set up out() and err(), as otherwise if an assertion fails it cannot print the message
  
  
  
  
  
  // {{PREAMBLE_ADDITIONS}}
  
  var STACK_ALIGN = 16;
  
  function dynamicAlloc(size) {
    var ret = HEAP32[DYNAMICTOP_PTR>>2];
    var end = (ret + size + 15) & -16;
    HEAP32[DYNAMICTOP_PTR>>2] = end;
    return ret;
  }
  
  function alignMemory(size, factor) {
    if (!factor) factor = STACK_ALIGN; // stack alignment (16-byte) by default
    return Math.ceil(size / factor) * factor;
  }
  
  function getNativeTypeSize(type) {
    switch (type) {
      case 'i1': case 'i8': return 1;
      case 'i16': return 2;
      case 'i32': return 4;
      case 'i64': return 8;
      case 'float': return 4;
      case 'double': return 8;
      default: {
        if (type[type.length-1] === '*') {
          return 4; // A pointer
        } else if (type[0] === 'i') {
          var bits = Number(type.substr(1));
          assert(bits % 8 === 0, 'getNativeTypeSize invalid bits ' + bits + ', type ' + type);
          return bits / 8;
        } else {
          return 0;
        }
      }
    }
  }
  
  function warnOnce(text) {
    if (!warnOnce.shown) warnOnce.shown = {};
    if (!warnOnce.shown[text]) {
      warnOnce.shown[text] = 1;
      err(text);
    }
  }
  
  
  
  
  
  // Wraps a JS function as a wasm function with a given signature.
  function convertJsFunctionToWasm(func, sig) {
  
    // If the type reflection proposal is available, use the new
    // "WebAssembly.Function" constructor.
    // Otherwise, construct a minimal wasm module importing the JS function and
    // re-exporting it.
    if (typeof WebAssembly.Function === "function") {
      var typeNames = {
        'i': 'i32',
        'j': 'i64',
        'f': 'f32',
        'd': 'f64'
      };
      var type = {
        parameters: [],
        results: sig[0] == 'v' ? [] : [typeNames[sig[0]]]
      };
      for (var i = 1; i < sig.length; ++i) {
        type.parameters.push(typeNames[sig[i]]);
      }
      return new WebAssembly.Function(type, func);
    }
  
    // The module is static, with the exception of the type section, which is
    // generated based on the signature passed in.
    var typeSection = [
      0x01, // id: section,
      0x00, // length: 0 (placeholder)
      0x01, // count: 1
      0x60, // form: func
    ];
    var sigRet = sig.slice(0, 1);
    var sigParam = sig.slice(1);
    var typeCodes = {
      'i': 0x7f, // i32
      'j': 0x7e, // i64
      'f': 0x7d, // f32
      'd': 0x7c, // f64
    };
  
    // Parameters, length + signatures
    typeSection.push(sigParam.length);
    for (var i = 0; i < sigParam.length; ++i) {
      typeSection.push(typeCodes[sigParam[i]]);
    }
  
    // Return values, length + signatures
    // With no multi-return in MVP, either 0 (void) or 1 (anything else)
    if (sigRet == 'v') {
      typeSection.push(0x00);
    } else {
      typeSection = typeSection.concat([0x01, typeCodes[sigRet]]);
    }
  
    // Write the overall length of the type section back into the section header
    // (excepting the 2 bytes for the section id and length)
    typeSection[1] = typeSection.length - 2;
  
    // Rest of the module is static
    var bytes = new Uint8Array([
      0x00, 0x61, 0x73, 0x6d, // magic ("\0asm")
      0x01, 0x00, 0x00, 0x00, // version: 1
    ].concat(typeSection, [
      0x02, 0x07, // import section
        // (import "e" "f" (func 0 (type 0)))
        0x01, 0x01, 0x65, 0x01, 0x66, 0x00, 0x00,
      0x07, 0x05, // export section
        // (export "f" (func 0 (type 0)))
        0x01, 0x01, 0x66, 0x00, 0x00,
    ]));
  
     // We can compile this wasm module synchronously because it is very small.
    // This accepts an import (at "e.f"), that it reroutes to an export (at "f")
    var module = new WebAssembly.Module(bytes);
    var instance = new WebAssembly.Instance(module, {
      'e': {
        'f': func
      }
    });
    var wrappedFunc = instance.exports['f'];
    return wrappedFunc;
  }
  
  var freeTableIndexes = [];
  
  // Weak map of functions in the table to their indexes, created on first use.
  var functionsInTableMap;
  
  // Add a wasm function to the table.
  function addFunctionWasm(func, sig) {
    var table = wasmTable;
  
    // Check if the function is already in the table, to ensure each function
    // gets a unique index. First, create the map if this is the first use.
    if (!functionsInTableMap) {
      functionsInTableMap = new WeakMap();
      for (var i = 0; i < table.length; i++) {
        var item = table.get(i);
        // Ignore null values.
        if (item) {
          functionsInTableMap.set(item, i);
        }
      }
    }
    if (functionsInTableMap.has(func)) {
      return functionsInTableMap.get(func);
    }
  
    // It's not in the table, add it now.
  
  
    var ret;
    // Reuse a free index if there is one, otherwise grow.
    if (freeTableIndexes.length) {
      ret = freeTableIndexes.pop();
    } else {
      ret = table.length;
      // Grow the table
      try {
        table.grow(1);
      } catch (err) {
        if (!(err instanceof RangeError)) {
          throw err;
        }
        throw 'Unable to grow wasm table. Set ALLOW_TABLE_GROWTH.';
      }
    }
  
    // Set the new value.
    try {
      // Attempting to call this with JS function will cause of table.set() to fail
      table.set(ret, func);
    } catch (err) {
      if (!(err instanceof TypeError)) {
        throw err;
      }
      var wrapped = convertJsFunctionToWasm(func, sig);
      table.set(ret, wrapped);
    }
  
    functionsInTableMap.set(func, ret);
  
    return ret;
  }
  
  function removeFunctionWasm(index) {
    functionsInTableMap.delete(wasmTable.get(index));
    freeTableIndexes.push(index);
  }
  
  // 'sig' parameter is required for the llvm backend but only when func is not
  // already a WebAssembly function.
  function addFunction(func, sig) {
  
    return addFunctionWasm(func, sig);
  }
  
  function removeFunction(index) {
    removeFunctionWasm(index);
  }
  
  
  
  var funcWrappers = {};
  
  function getFuncWrapper(func, sig) {
    if (!func) return; // on null pointer, return undefined
    assert(sig);
    if (!funcWrappers[sig]) {
      funcWrappers[sig] = {};
    }
    var sigCache = funcWrappers[sig];
    if (!sigCache[func]) {
      // optimize away arguments usage in common cases
      if (sig.length === 1) {
        sigCache[func] = function dynCall_wrapper() {
          return dynCall(sig, func);
        };
      } else if (sig.length === 2) {
        sigCache[func] = function dynCall_wrapper(arg) {
          return dynCall(sig, func, [arg]);
        };
      } else {
        // general case
        sigCache[func] = function dynCall_wrapper() {
          return dynCall(sig, func, Array.prototype.slice.call(arguments));
        };
      }
    }
    return sigCache[func];
  }
  
  
  
  
  
  
  
  function makeBigInt(low, high, unsigned) {
    return unsigned ? ((+((low>>>0)))+((+((high>>>0)))*4294967296.0)) : ((+((low>>>0)))+((+((high|0)))*4294967296.0));
  }
  
  /** @param {Array=} args */
  function dynCall(sig, ptr, args) {
    if (args && args.length) {
      return Module['dynCall_' + sig].apply(null, [ptr].concat(args));
    } else {
      return Module['dynCall_' + sig].call(null, ptr);
    }
  }
  
  var tempRet0 = 0;
  
  var setTempRet0 = function(value) {
    tempRet0 = value;
  };
  
  var getTempRet0 = function() {
    return tempRet0;
  };
  
  
  // The address globals begin at. Very low in memory, for code size and optimization opportunities.
  // Above 0 is static memory, starting with globals.
  // Then the stack.
  // Then 'dynamic' memory for sbrk.
  var GLOBAL_BASE = 1024;
  
  
  
  
  
  // === Preamble library stuff ===
  
  // Documentation for the public APIs defined in this file must be updated in:
  //    site/source/docs/api_reference/preamble.js.rst
  // A prebuilt local version of the documentation is available at:
  //    site/build/text/docs/api_reference/preamble.js.txt
  // You can also build docs locally as HTML or other formats in site/
  // An online HTML version (which may be of a different version of Emscripten)
  //    is up at http://kripken.github.io/emscripten-site/docs/api_reference/preamble.js.html
  
  
  var wasmBinary;if (Module['wasmBinary']) wasmBinary = Module['wasmBinary'];
  var noExitRuntime;if (Module['noExitRuntime']) noExitRuntime = Module['noExitRuntime'];
  
  
  if (typeof WebAssembly !== 'object') {
    abort('no native wasm support detected');
  }
  
  
  
  
  // In MINIMAL_RUNTIME, setValue() and getValue() are only available when building with safe heap enabled, for heap safety checking.
  // In traditional runtime, setValue() and getValue() are always available (although their use is highly discouraged due to perf penalties)
  
  /** @param {number} ptr
      @param {number} value
      @param {string} type
      @param {number|boolean=} noSafe */
  function setValue(ptr, value, type, noSafe) {
    type = type || 'i8';
    if (type.charAt(type.length-1) === '*') type = 'i32'; // pointers are 32-bit
      switch(type) {
        case 'i1': HEAP8[((ptr)>>0)]=value; break;
        case 'i8': HEAP8[((ptr)>>0)]=value; break;
        case 'i16': HEAP16[((ptr)>>1)]=value; break;
        case 'i32': HEAP32[((ptr)>>2)]=value; break;
        case 'i64': (tempI64 = [value>>>0,(tempDouble=value,(+(Math_abs(tempDouble))) >= 1.0 ? (tempDouble > 0.0 ? ((Math_min((+(Math_floor((tempDouble)/4294967296.0))), 4294967295.0))|0)>>>0 : (~~((+(Math_ceil((tempDouble - +(((~~(tempDouble)))>>>0))/4294967296.0)))))>>>0) : 0)],HEAP32[((ptr)>>2)]=tempI64[0],HEAP32[(((ptr)+(4))>>2)]=tempI64[1]); break;
        case 'float': HEAPF32[((ptr)>>2)]=value; break;
        case 'double': HEAPF64[((ptr)>>3)]=value; break;
        default: abort('invalid type for setValue: ' + type);
      }
  }
  
  /** @param {number} ptr
      @param {string} type
      @param {number|boolean=} noSafe */
  function getValue(ptr, type, noSafe) {
    type = type || 'i8';
    if (type.charAt(type.length-1) === '*') type = 'i32'; // pointers are 32-bit
      switch(type) {
        case 'i1': return HEAP8[((ptr)>>0)];
        case 'i8': return HEAP8[((ptr)>>0)];
        case 'i16': return HEAP16[((ptr)>>1)];
        case 'i32': return HEAP32[((ptr)>>2)];
        case 'i64': return HEAP32[((ptr)>>2)];
        case 'float': return HEAPF32[((ptr)>>2)];
        case 'double': return HEAPF64[((ptr)>>3)];
        default: abort('invalid type for getValue: ' + type);
      }
    return null;
  }
  
  
  
  
  
  
  // Wasm globals
  
  var wasmMemory;
  
  // In fastcomp asm.js, we don't need a wasm Table at all.
  // In the wasm backend, we polyfill the WebAssembly object,
  // so this creates a (non-native-wasm) table for us.
  
  var wasmTable = new WebAssembly.Table({
    'initial': 1417,
    'maximum': 1417,
    'element': 'anyfunc'
  });
  
  
  
  
  //========================================
  // Runtime essentials
  //========================================
  
  // whether we are quitting the application. no code should run after this.
  // set in exit() and abort()
  var ABORT = false;
  
  // set by exit() and abort().  Passed to 'onExit' handler.
  // NOTE: This is also used as the process return code code in shell environments
  // but only when noExitRuntime is false.
  var EXITSTATUS = 0;
  
  /** @type {function(*, string=)} */
  function assert(condition, text) {
    if (!condition) {
      abort('Assertion failed: ' + text);
    }
  }
  
  // Returns the C function with a specified identifier (for C++, you need to do manual name mangling)
  function getCFunc(ident) {
    var func = Module['_' + ident]; // closure exported function
    assert(func, 'Cannot call unknown function ' + ident + ', make sure it is exported');
    return func;
  }
  
  // C calling interface.
  /** @param {string|null=} returnType
      @param {Array=} argTypes
      @param {Arguments|Array=} args
      @param {Object=} opts */
  function ccall(ident, returnType, argTypes, args, opts) {
    // For fast lookup of conversion functions
    var toC = {
      'string': function(str) {
        var ret = 0;
        if (str !== null && str !== undefined && str !== 0) { // null string
          // at most 4 bytes per UTF-8 code point, +1 for the trailing '\0'
          var len = (str.length << 2) + 1;
          ret = stackAlloc(len);
          stringToUTF8(str, ret, len);
        }
        return ret;
      },
      'array': function(arr) {
        var ret = stackAlloc(arr.length);
        writeArrayToMemory(arr, ret);
        return ret;
      }
    };
  
    function convertReturnValue(ret) {
      if (returnType === 'string') return UTF8ToString(ret);
      if (returnType === 'boolean') return Boolean(ret);
      return ret;
    }
  
    var func = getCFunc(ident);
    var cArgs = [];
    var stack = 0;
    if (args) {
      for (var i = 0; i < args.length; i++) {
        var converter = toC[argTypes[i]];
        if (converter) {
          if (stack === 0) stack = stackSave();
          cArgs[i] = converter(args[i]);
        } else {
          cArgs[i] = args[i];
        }
      }
    }
    var ret = func.apply(null, cArgs);
  
    ret = convertReturnValue(ret);
    if (stack !== 0) stackRestore(stack);
    return ret;
  }
  
  /** @param {string=} returnType
      @param {Array=} argTypes
      @param {Object=} opts */
  function cwrap(ident, returnType, argTypes, opts) {
    argTypes = argTypes || [];
    // When the function takes numbers and returns a number, we can just return
    // the original function
    var numericArgs = argTypes.every(function(type){ return type === 'number'});
    var numericRet = returnType !== 'string';
    if (numericRet && numericArgs && !opts) {
      return getCFunc(ident);
    }
    return function() {
      return ccall(ident, returnType, argTypes, arguments, opts);
    }
  }
  
  var ALLOC_NORMAL = 0; // Tries to use _malloc()
  var ALLOC_STACK = 1; // Lives for the duration of the current function call
  var ALLOC_DYNAMIC = 2; // Cannot be freed except through sbrk
  var ALLOC_NONE = 3; // Do not allocate
  
  // allocate(): This is for internal use. You can use it yourself as well, but the interface
  //             is a little tricky (see docs right below). The reason is that it is optimized
  //             for multiple syntaxes to save space in generated code. So you should
  //             normally not use allocate(), and instead allocate memory using _malloc(),
  //             initialize it with setValue(), and so forth.
  // @slab: An array of data, or a number. If a number, then the size of the block to allocate,
  //        in *bytes* (note that this is sometimes confusing: the next parameter does not
  //        affect this!)
  // @types: Either an array of types, one for each byte (or 0 if no type at that position),
  //         or a single type which is used for the entire block. This only matters if there
  //         is initial data - if @slab is a number, then this does not matter at all and is
  //         ignored.
  // @allocator: How to allocate memory, see ALLOC_*
  /** @type {function((TypedArray|Array<number>|number), string, number, number=)} */
  function allocate(slab, types, allocator, ptr) {
    var zeroinit, size;
    if (typeof slab === 'number') {
      zeroinit = true;
      size = slab;
    } else {
      zeroinit = false;
      size = slab.length;
    }
  
    var singleType = typeof types === 'string' ? types : null;
  
    var ret;
    if (allocator == ALLOC_NONE) {
      ret = ptr;
    } else {
      ret = [_malloc,
      stackAlloc,
      dynamicAlloc][allocator](Math.max(size, singleType ? 1 : types.length));
    }
  
    if (zeroinit) {
      var stop;
      ptr = ret;
      assert((ret & 3) == 0);
      stop = ret + (size & ~3);
      for (; ptr < stop; ptr += 4) {
        HEAP32[((ptr)>>2)]=0;
      }
      stop = ret + size;
      while (ptr < stop) {
        HEAP8[((ptr++)>>0)]=0;
      }
      return ret;
    }
  
    if (singleType === 'i8') {
      if (slab.subarray || slab.slice) {
        HEAPU8.set(/** @type {!Uint8Array} */ (slab), ret);
      } else {
        HEAPU8.set(new Uint8Array(slab), ret);
      }
      return ret;
    }
  
    var i = 0, type, typeSize, previousType;
    while (i < size) {
      var curr = slab[i];
  
      type = singleType || types[i];
      if (type === 0) {
        i++;
        continue;
      }
  
      if (type == 'i64') type = 'i32'; // special case: we have one i32 here, and one i32 later
  
      setValue(ret+i, curr, type);
  
      // no need to look up size unless type changes, so cache it
      if (previousType !== type) {
        typeSize = getNativeTypeSize(type);
        previousType = type;
      }
      i += typeSize;
    }
  
    return ret;
  }
  
  // Allocate memory during any stage of startup - static memory early on, dynamic memory later, malloc when ready
  function getMemory(size) {
    if (!runtimeInitialized) return dynamicAlloc(size);
    return _malloc(size);
  }
  
  
  
  
  // runtime_strings.js: Strings related runtime functions that are part of both MINIMAL_RUNTIME and regular runtime.
  
  // Given a pointer 'ptr' to a null-terminated UTF8-encoded string in the given array that contains uint8 values, returns
  // a copy of that string as a Javascript String object.
  
  var UTF8Decoder = typeof TextDecoder !== 'undefined' ? new TextDecoder('utf8') : undefined;
  
  /**
   * @param {number} idx
   * @param {number=} maxBytesToRead
   * @return {string}
   */
  function UTF8ArrayToString(heap, idx, maxBytesToRead) {
    var endIdx = idx + maxBytesToRead;
    var endPtr = idx;
    // TextDecoder needs to know the byte length in advance, it doesn't stop on null terminator by itself.
    // Also, use the length info to avoid running tiny strings through TextDecoder, since .subarray() allocates garbage.
    // (As a tiny code save trick, compare endPtr against endIdx using a negation, so that undefined means Infinity)
    while (heap[endPtr] && !(endPtr >= endIdx)) ++endPtr;
  
    if (endPtr - idx > 16 && heap.subarray && UTF8Decoder) {
      return UTF8Decoder.decode(heap.subarray(idx, endPtr));
    } else {
      var str = '';
      // If building with TextDecoder, we have already computed the string length above, so test loop end condition against that
      while (idx < endPtr) {
        // For UTF8 byte structure, see:
        // http://en.wikipedia.org/wiki/UTF-8#Description
        // https://www.ietf.org/rfc/rfc2279.txt
        // https://tools.ietf.org/html/rfc3629
        var u0 = heap[idx++];
        if (!(u0 & 0x80)) { str += String.fromCharCode(u0); continue; }
        var u1 = heap[idx++] & 63;
        if ((u0 & 0xE0) == 0xC0) { str += String.fromCharCode(((u0 & 31) << 6) | u1); continue; }
        var u2 = heap[idx++] & 63;
        if ((u0 & 0xF0) == 0xE0) {
          u0 = ((u0 & 15) << 12) | (u1 << 6) | u2;
        } else {
          u0 = ((u0 & 7) << 18) | (u1 << 12) | (u2 << 6) | (heap[idx++] & 63);
        }
  
        if (u0 < 0x10000) {
          str += String.fromCharCode(u0);
        } else {
          var ch = u0 - 0x10000;
          str += String.fromCharCode(0xD800 | (ch >> 10), 0xDC00 | (ch & 0x3FF));
        }
      }
    }
    return str;
  }
  
  // Given a pointer 'ptr' to a null-terminated UTF8-encoded string in the emscripten HEAP, returns a
  // copy of that string as a Javascript String object.
  // maxBytesToRead: an optional length that specifies the maximum number of bytes to read. You can omit
  //                 this parameter to scan the string until the first \0 byte. If maxBytesToRead is
  //                 passed, and the string at [ptr, ptr+maxBytesToReadr[ contains a null byte in the
  //                 middle, then the string will cut short at that byte index (i.e. maxBytesToRead will
  //                 not produce a string of exact length [ptr, ptr+maxBytesToRead[)
  //                 N.B. mixing frequent uses of UTF8ToString() with and without maxBytesToRead may
  //                 throw JS JIT optimizations off, so it is worth to consider consistently using one
  //                 style or the other.
  /**
   * @param {number} ptr
   * @param {number=} maxBytesToRead
   * @return {string}
   */
  function UTF8ToString(ptr, maxBytesToRead) {
    return ptr ? UTF8ArrayToString(HEAPU8, ptr, maxBytesToRead) : '';
  }
  
  // Copies the given Javascript String object 'str' to the given byte array at address 'outIdx',
  // encoded in UTF8 form and null-terminated. The copy will require at most str.length*4+1 bytes of space in the HEAP.
  // Use the function lengthBytesUTF8 to compute the exact number of bytes (excluding null terminator) that this function will write.
  // Parameters:
  //   str: the Javascript string to copy.
  //   heap: the array to copy to. Each index in this array is assumed to be one 8-byte element.
  //   outIdx: The starting offset in the array to begin the copying.
  //   maxBytesToWrite: The maximum number of bytes this function can write to the array.
  //                    This count should include the null terminator,
  //                    i.e. if maxBytesToWrite=1, only the null terminator will be written and nothing else.
  //                    maxBytesToWrite=0 does not write any bytes to the output, not even the null terminator.
  // Returns the number of bytes written, EXCLUDING the null terminator.
  
  function stringToUTF8Array(str, heap, outIdx, maxBytesToWrite) {
    if (!(maxBytesToWrite > 0)) // Parameter maxBytesToWrite is not optional. Negative values, 0, null, undefined and false each don't write out any bytes.
      return 0;
  
    var startIdx = outIdx;
    var endIdx = outIdx + maxBytesToWrite - 1; // -1 for string null terminator.
    for (var i = 0; i < str.length; ++i) {
      // Gotcha: charCodeAt returns a 16-bit word that is a UTF-16 encoded code unit, not a Unicode code point of the character! So decode UTF16->UTF32->UTF8.
      // See http://unicode.org/faq/utf_bom.html#utf16-3
      // For UTF8 byte structure, see http://en.wikipedia.org/wiki/UTF-8#Description and https://www.ietf.org/rfc/rfc2279.txt and https://tools.ietf.org/html/rfc3629
      var u = str.charCodeAt(i); // possibly a lead surrogate
      if (u >= 0xD800 && u <= 0xDFFF) {
        var u1 = str.charCodeAt(++i);
        u = 0x10000 + ((u & 0x3FF) << 10) | (u1 & 0x3FF);
      }
      if (u <= 0x7F) {
        if (outIdx >= endIdx) break;
        heap[outIdx++] = u;
      } else if (u <= 0x7FF) {
        if (outIdx + 1 >= endIdx) break;
        heap[outIdx++] = 0xC0 | (u >> 6);
        heap[outIdx++] = 0x80 | (u & 63);
      } else if (u <= 0xFFFF) {
        if (outIdx + 2 >= endIdx) break;
        heap[outIdx++] = 0xE0 | (u >> 12);
        heap[outIdx++] = 0x80 | ((u >> 6) & 63);
        heap[outIdx++] = 0x80 | (u & 63);
      } else {
        if (outIdx + 3 >= endIdx) break;
        heap[outIdx++] = 0xF0 | (u >> 18);
        heap[outIdx++] = 0x80 | ((u >> 12) & 63);
        heap[outIdx++] = 0x80 | ((u >> 6) & 63);
        heap[outIdx++] = 0x80 | (u & 63);
      }
    }
    // Null-terminate the pointer to the buffer.
    heap[outIdx] = 0;
    return outIdx - startIdx;
  }
  
  // Copies the given Javascript String object 'str' to the emscripten HEAP at address 'outPtr',
  // null-terminated and encoded in UTF8 form. The copy will require at most str.length*4+1 bytes of space in the HEAP.
  // Use the function lengthBytesUTF8 to compute the exact number of bytes (excluding null terminator) that this function will write.
  // Returns the number of bytes written, EXCLUDING the null terminator.
  
  function stringToUTF8(str, outPtr, maxBytesToWrite) {
    return stringToUTF8Array(str, HEAPU8,outPtr, maxBytesToWrite);
  }
  
  // Returns the number of bytes the given Javascript string takes if encoded as a UTF8 byte array, EXCLUDING the null terminator byte.
  function lengthBytesUTF8(str) {
    var len = 0;
    for (var i = 0; i < str.length; ++i) {
      // Gotcha: charCodeAt returns a 16-bit word that is a UTF-16 encoded code unit, not a Unicode code point of the character! So decode UTF16->UTF32->UTF8.
      // See http://unicode.org/faq/utf_bom.html#utf16-3
      var u = str.charCodeAt(i); // possibly a lead surrogate
      if (u >= 0xD800 && u <= 0xDFFF) u = 0x10000 + ((u & 0x3FF) << 10) | (str.charCodeAt(++i) & 0x3FF);
      if (u <= 0x7F) ++len;
      else if (u <= 0x7FF) len += 2;
      else if (u <= 0xFFFF) len += 3;
      else len += 4;
    }
    return len;
  }
  
  
  
  
  
  // runtime_strings_extra.js: Strings related runtime functions that are available only in regular runtime.
  
  // Given a pointer 'ptr' to a null-terminated ASCII-encoded string in the emscripten HEAP, returns
  // a copy of that string as a Javascript String object.
  
  function AsciiToString(ptr) {
    var str = '';
    while (1) {
      var ch = HEAPU8[((ptr++)>>0)];
      if (!ch) return str;
      str += String.fromCharCode(ch);
    }
  }
  
  // Copies the given Javascript String object 'str' to the emscripten HEAP at address 'outPtr',
  // null-terminated and encoded in ASCII form. The copy will require at most str.length+1 bytes of space in the HEAP.
  
  function stringToAscii(str, outPtr) {
    return writeAsciiToMemory(str, outPtr, false);
  }
  
  // Given a pointer 'ptr' to a null-terminated UTF16LE-encoded string in the emscripten HEAP, returns
  // a copy of that string as a Javascript String object.
  
  var UTF16Decoder = typeof TextDecoder !== 'undefined' ? new TextDecoder('utf-16le') : undefined;
  
  function UTF16ToString(ptr, maxBytesToRead) {
    var endPtr = ptr;
    // TextDecoder needs to know the byte length in advance, it doesn't stop on null terminator by itself.
    // Also, use the length info to avoid running tiny strings through TextDecoder, since .subarray() allocates garbage.
    var idx = endPtr >> 1;
    var maxIdx = idx + maxBytesToRead / 2;
    // If maxBytesToRead is not passed explicitly, it will be undefined, and this
    // will always evaluate to true. This saves on code size.
    while (!(idx >= maxIdx) && HEAPU16[idx]) ++idx;
    endPtr = idx << 1;
  
    if (endPtr - ptr > 32 && UTF16Decoder) {
      return UTF16Decoder.decode(HEAPU8.subarray(ptr, endPtr));
    } else {
      var i = 0;
  
      var str = '';
      while (1) {
        var codeUnit = HEAP16[(((ptr)+(i*2))>>1)];
        if (codeUnit == 0 || i == maxBytesToRead / 2) return str;
        ++i;
        // fromCharCode constructs a character from a UTF-16 code unit, so we can pass the UTF16 string right through.
        str += String.fromCharCode(codeUnit);
      }
    }
  }
  
  // Copies the given Javascript String object 'str' to the emscripten HEAP at address 'outPtr',
  // null-terminated and encoded in UTF16 form. The copy will require at most str.length*4+2 bytes of space in the HEAP.
  // Use the function lengthBytesUTF16() to compute the exact number of bytes (excluding null terminator) that this function will write.
  // Parameters:
  //   str: the Javascript string to copy.
  //   outPtr: Byte address in Emscripten HEAP where to write the string to.
  //   maxBytesToWrite: The maximum number of bytes this function can write to the array. This count should include the null
  //                    terminator, i.e. if maxBytesToWrite=2, only the null terminator will be written and nothing else.
  //                    maxBytesToWrite<2 does not write any bytes to the output, not even the null terminator.
  // Returns the number of bytes written, EXCLUDING the null terminator.
  
  function stringToUTF16(str, outPtr, maxBytesToWrite) {
    // Backwards compatibility: if max bytes is not specified, assume unsafe unbounded write is allowed.
    if (maxBytesToWrite === undefined) {
      maxBytesToWrite = 0x7FFFFFFF;
    }
    if (maxBytesToWrite < 2) return 0;
    maxBytesToWrite -= 2; // Null terminator.
    var startPtr = outPtr;
    var numCharsToWrite = (maxBytesToWrite < str.length*2) ? (maxBytesToWrite / 2) : str.length;
    for (var i = 0; i < numCharsToWrite; ++i) {
      // charCodeAt returns a UTF-16 encoded code unit, so it can be directly written to the HEAP.
      var codeUnit = str.charCodeAt(i); // possibly a lead surrogate
      HEAP16[((outPtr)>>1)]=codeUnit;
      outPtr += 2;
    }
    // Null-terminate the pointer to the HEAP.
    HEAP16[((outPtr)>>1)]=0;
    return outPtr - startPtr;
  }
  
  // Returns the number of bytes the given Javascript string takes if encoded as a UTF16 byte array, EXCLUDING the null terminator byte.
  
  function lengthBytesUTF16(str) {
    return str.length*2;
  }
  
  function UTF32ToString(ptr, maxBytesToRead) {
    var i = 0;
  
    var str = '';
    // If maxBytesToRead is not passed explicitly, it will be undefined, and this
    // will always evaluate to true. This saves on code size.
    while (!(i >= maxBytesToRead / 4)) {
      var utf32 = HEAP32[(((ptr)+(i*4))>>2)];
      if (utf32 == 0) break;
      ++i;
      // Gotcha: fromCharCode constructs a character from a UTF-16 encoded code (pair), not from a Unicode code point! So encode the code point to UTF-16 for constructing.
      // See http://unicode.org/faq/utf_bom.html#utf16-3
      if (utf32 >= 0x10000) {
        var ch = utf32 - 0x10000;
        str += String.fromCharCode(0xD800 | (ch >> 10), 0xDC00 | (ch & 0x3FF));
      } else {
        str += String.fromCharCode(utf32);
      }
    }
    return str;
  }
  
  // Copies the given Javascript String object 'str' to the emscripten HEAP at address 'outPtr',
  // null-terminated and encoded in UTF32 form. The copy will require at most str.length*4+4 bytes of space in the HEAP.
  // Use the function lengthBytesUTF32() to compute the exact number of bytes (excluding null terminator) that this function will write.
  // Parameters:
  //   str: the Javascript string to copy.
  //   outPtr: Byte address in Emscripten HEAP where to write the string to.
  //   maxBytesToWrite: The maximum number of bytes this function can write to the array. This count should include the null
  //                    terminator, i.e. if maxBytesToWrite=4, only the null terminator will be written and nothing else.
  //                    maxBytesToWrite<4 does not write any bytes to the output, not even the null terminator.
  // Returns the number of bytes written, EXCLUDING the null terminator.
  
  function stringToUTF32(str, outPtr, maxBytesToWrite) {
    // Backwards compatibility: if max bytes is not specified, assume unsafe unbounded write is allowed.
    if (maxBytesToWrite === undefined) {
      maxBytesToWrite = 0x7FFFFFFF;
    }
    if (maxBytesToWrite < 4) return 0;
    var startPtr = outPtr;
    var endPtr = startPtr + maxBytesToWrite - 4;
    for (var i = 0; i < str.length; ++i) {
      // Gotcha: charCodeAt returns a 16-bit word that is a UTF-16 encoded code unit, not a Unicode code point of the character! We must decode the string to UTF-32 to the heap.
      // See http://unicode.org/faq/utf_bom.html#utf16-3
      var codeUnit = str.charCodeAt(i); // possibly a lead surrogate
      if (codeUnit >= 0xD800 && codeUnit <= 0xDFFF) {
        var trailSurrogate = str.charCodeAt(++i);
        codeUnit = 0x10000 + ((codeUnit & 0x3FF) << 10) | (trailSurrogate & 0x3FF);
      }
      HEAP32[((outPtr)>>2)]=codeUnit;
      outPtr += 4;
      if (outPtr + 4 > endPtr) break;
    }
    // Null-terminate the pointer to the HEAP.
    HEAP32[((outPtr)>>2)]=0;
    return outPtr - startPtr;
  }
  
  // Returns the number of bytes the given Javascript string takes if encoded as a UTF16 byte array, EXCLUDING the null terminator byte.
  
  function lengthBytesUTF32(str) {
    var len = 0;
    for (var i = 0; i < str.length; ++i) {
      // Gotcha: charCodeAt returns a 16-bit word that is a UTF-16 encoded code unit, not a Unicode code point of the character! We must decode the string to UTF-32 to the heap.
      // See http://unicode.org/faq/utf_bom.html#utf16-3
      var codeUnit = str.charCodeAt(i);
      if (codeUnit >= 0xD800 && codeUnit <= 0xDFFF) ++i; // possibly a lead surrogate, so skip over the tail surrogate.
      len += 4;
    }
  
    return len;
  }
  
  // Allocate heap space for a JS string, and write it there.
  // It is the responsibility of the caller to free() that memory.
  function allocateUTF8(str) {
    var size = lengthBytesUTF8(str) + 1;
    var ret = _malloc(size);
    if (ret) stringToUTF8Array(str, HEAP8, ret, size);
    return ret;
  }
  
  // Allocate stack space for a JS string, and write it there.
  function allocateUTF8OnStack(str) {
    var size = lengthBytesUTF8(str) + 1;
    var ret = stackAlloc(size);
    stringToUTF8Array(str, HEAP8, ret, size);
    return ret;
  }
  
  // Deprecated: This function should not be called because it is unsafe and does not provide
  // a maximum length limit of how many bytes it is allowed to write. Prefer calling the
  // function stringToUTF8Array() instead, which takes in a maximum length that can be used
  // to be secure from out of bounds writes.
  /** @deprecated
      @param {boolean=} dontAddNull */
  function writeStringToMemory(string, buffer, dontAddNull) {
    warnOnce('writeStringToMemory is deprecated and should not be called! Use stringToUTF8() instead!');
  
    var /** @type {number} */ lastChar, /** @type {number} */ end;
    if (dontAddNull) {
      // stringToUTF8Array always appends null. If we don't want to do that, remember the
      // character that existed at the location where the null will be placed, and restore
      // that after the write (below).
      end = buffer + lengthBytesUTF8(string);
      lastChar = HEAP8[end];
    }
    stringToUTF8(string, buffer, Infinity);
    if (dontAddNull) HEAP8[end] = lastChar; // Restore the value under the null character.
  }
  
  function writeArrayToMemory(array, buffer) {
    HEAP8.set(array, buffer);
  }
  
  /** @param {boolean=} dontAddNull */
  function writeAsciiToMemory(str, buffer, dontAddNull) {
    for (var i = 0; i < str.length; ++i) {
      HEAP8[((buffer++)>>0)]=str.charCodeAt(i);
    }
    // Null-terminate the pointer to the HEAP.
    if (!dontAddNull) HEAP8[((buffer)>>0)]=0;
  }
  
  
  
  // Memory management
  
  var PAGE_SIZE = 16384;
  var WASM_PAGE_SIZE = 65536;
  var ASMJS_PAGE_SIZE = 16777216;
  
  function alignUp(x, multiple) {
    if (x % multiple > 0) {
      x += multiple - (x % multiple);
    }
    return x;
  }
  
  var HEAP,
  /** @type {ArrayBuffer} */
    buffer,
  /** @type {Int8Array} */
    HEAP8,
  /** @type {Uint8Array} */
    HEAPU8,
  /** @type {Int16Array} */
    HEAP16,
  /** @type {Uint16Array} */
    HEAPU16,
  /** @type {Int32Array} */
    HEAP32,
  /** @type {Uint32Array} */
    HEAPU32,
  /** @type {Float32Array} */
    HEAPF32,
  /** @type {Float64Array} */
    HEAPF64;
  
  function updateGlobalBufferAndViews(buf) {
    buffer = buf;
    Module['HEAP8'] = HEAP8 = new Int8Array(buf);
    Module['HEAP16'] = HEAP16 = new Int16Array(buf);
    Module['HEAP32'] = HEAP32 = new Int32Array(buf);
    Module['HEAPU8'] = HEAPU8 = new Uint8Array(buf);
    Module['HEAPU16'] = HEAPU16 = new Uint16Array(buf);
    Module['HEAPU32'] = HEAPU32 = new Uint32Array(buf);
    Module['HEAPF32'] = HEAPF32 = new Float32Array(buf);
    Module['HEAPF64'] = HEAPF64 = new Float64Array(buf);
  }
  
  var STATIC_BASE = 1024,
      STACK_BASE = 5371776,
      STACKTOP = STACK_BASE,
      STACK_MAX = 128896,
      DYNAMIC_BASE = 5371776,
      DYNAMICTOP_PTR = 128736;
  
  
  
  var TOTAL_STACK = 5242880;
  
  var INITIAL_INITIAL_MEMORY = Module['INITIAL_MEMORY'] || 16777216;
  
  
  
  
  
  
  
  
  
  // In non-standalone/normal mode, we create the memory here.
  
  
  
  // Create the main memory. (Note: this isn't used in STANDALONE_WASM mode since the wasm
  // memory is created in the wasm, not in JS.)
  
    if (Module['wasmMemory']) {
      wasmMemory = Module['wasmMemory'];
    } else
    {
      wasmMemory = new WebAssembly.Memory({
        'initial': INITIAL_INITIAL_MEMORY / WASM_PAGE_SIZE
        ,
        'maximum': 2147483648 / WASM_PAGE_SIZE
      });
    }
  
  
  if (wasmMemory) {
    buffer = wasmMemory.buffer;
  }
  
  // If the user provides an incorrect length, just use that length instead rather than providing the user to
  // specifically provide the memory length with Module['INITIAL_MEMORY'].
  INITIAL_INITIAL_MEMORY = buffer.byteLength;
  updateGlobalBufferAndViews(buffer);
  
  HEAP32[DYNAMICTOP_PTR>>2] = DYNAMIC_BASE;
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  function callRuntimeCallbacks(callbacks) {
    while(callbacks.length > 0) {
      var callback = callbacks.shift();
      if (typeof callback == 'function') {
        callback(Module); // Pass the module as the first argument.
        continue;
      }
      var func = callback.func;
      if (typeof func === 'number') {
        if (callback.arg === undefined) {
          Module['dynCall_v'](func);
        } else {
          Module['dynCall_vi'](func, callback.arg);
        }
      } else {
        func(callback.arg === undefined ? null : callback.arg);
      }
    }
  }
  
  var __ATPRERUN__  = []; // functions called before the runtime is initialized
  var __ATINIT__    = []; // functions called during startup
  var __ATMAIN__    = []; // functions called when main() is to be run
  var __ATEXIT__    = []; // functions called during shutdown
  var __ATPOSTRUN__ = []; // functions called after the main() is called
  
  var runtimeInitialized = false;
  var runtimeExited = false;
  
  
  function preRun() {
  
    if (Module['preRun']) {
      if (typeof Module['preRun'] == 'function') Module['preRun'] = [Module['preRun']];
      while (Module['preRun'].length) {
        addOnPreRun(Module['preRun'].shift());
      }
    }
  
    callRuntimeCallbacks(__ATPRERUN__);
  }
  
  function initRuntime() {
    runtimeInitialized = true;
    if (!Module["noFSInit"] && !FS.init.initialized) FS.init();
  TTY.init();
    callRuntimeCallbacks(__ATINIT__);
  }
  
  function preMain() {
    FS.ignorePermissions = false;
    callRuntimeCallbacks(__ATMAIN__);
  }
  
  function exitRuntime() {
    runtimeExited = true;
  }
  
  function postRun() {
  
    if (Module['postRun']) {
      if (typeof Module['postRun'] == 'function') Module['postRun'] = [Module['postRun']];
      while (Module['postRun'].length) {
        addOnPostRun(Module['postRun'].shift());
      }
    }
  
    callRuntimeCallbacks(__ATPOSTRUN__);
  }
  
  function addOnPreRun(cb) {
    __ATPRERUN__.unshift(cb);
  }
  
  function addOnInit(cb) {
    __ATINIT__.unshift(cb);
  }
  
  function addOnPreMain(cb) {
    __ATMAIN__.unshift(cb);
  }
  
  function addOnExit(cb) {
  }
  
  function addOnPostRun(cb) {
    __ATPOSTRUN__.unshift(cb);
  }
  
  /** @param {number|boolean=} ignore */
  function unSign(value, bits, ignore) {
    if (value >= 0) {
      return value;
    }
    return bits <= 32 ? 2*Math.abs(1 << (bits-1)) + value // Need some trickery, since if bits == 32, we are right at the limit of the bits JS uses in bitshifts
                      : Math.pow(2, bits)         + value;
  }
  /** @param {number|boolean=} ignore */
  function reSign(value, bits, ignore) {
    if (value <= 0) {
      return value;
    }
    var half = bits <= 32 ? Math.abs(1 << (bits-1)) // abs is needed if bits == 32
                          : Math.pow(2, bits-1);
    if (value >= half && (bits <= 32 || value > half)) { // for huge values, we can hit the precision limit and always get true here. so don't do that
                                                         // but, in general there is no perfect solution here. With 64-bit ints, we get rounding and errors
                                                         // TODO: In i64 mode 1, resign the two parts separately and safely
      value = -2*half + value; // Cannot bitshift half, as it may be at the limit of the bits JS uses in bitshifts
    }
    return value;
  }
  
  
  
  
  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/imul
  
  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/fround
  
  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/clz32
  
  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc
  
  
  var Math_abs = Math.abs;
  var Math_cos = Math.cos;
  var Math_sin = Math.sin;
  var Math_tan = Math.tan;
  var Math_acos = Math.acos;
  var Math_asin = Math.asin;
  var Math_atan = Math.atan;
  var Math_atan2 = Math.atan2;
  var Math_exp = Math.exp;
  var Math_log = Math.log;
  var Math_sqrt = Math.sqrt;
  var Math_ceil = Math.ceil;
  var Math_floor = Math.floor;
  var Math_pow = Math.pow;
  var Math_imul = Math.imul;
  var Math_fround = Math.fround;
  var Math_round = Math.round;
  var Math_min = Math.min;
  var Math_max = Math.max;
  var Math_clz32 = Math.clz32;
  var Math_trunc = Math.trunc;
  
  
  
  // A counter of dependencies for calling run(). If we need to
  // do asynchronous work before running, increment this and
  // decrement it. Incrementing must happen in a place like
  // Module.preRun (used by emcc to add file preloading).
  // Note that you can add dependencies in preRun, even though
  // it happens right before run - run will be postponed until
  // the dependencies are met.
  var runDependencies = 0;
  var runDependencyWatcher = null;
  var dependenciesFulfilled = null; // overridden to take different actions when all run dependencies are fulfilled
  
  function getUniqueRunDependency(id) {
    return id;
  }
  
  function addRunDependency(id) {
    runDependencies++;
  
    if (Module['monitorRunDependencies']) {
      Module['monitorRunDependencies'](runDependencies);
    }
  
  }
  
  function removeRunDependency(id) {
    runDependencies--;
  
    if (Module['monitorRunDependencies']) {
      Module['monitorRunDependencies'](runDependencies);
    }
  
    if (runDependencies == 0) {
      if (runDependencyWatcher !== null) {
        clearInterval(runDependencyWatcher);
        runDependencyWatcher = null;
      }
      if (dependenciesFulfilled) {
        var callback = dependenciesFulfilled;
        dependenciesFulfilled = null;
        callback(); // can add another dependenciesFulfilled
      }
    }
  }
  
  Module["preloadedImages"] = {}; // maps url to image data
  Module["preloadedAudios"] = {}; // maps url to audio data
  
  /** @param {string|number=} what */
  function abort(what) {
    if (Module['onAbort']) {
      Module['onAbort'](what);
    }
  
    what += '';
    err(what);
  
    ABORT = true;
    EXITSTATUS = 1;
  
    what = 'abort(' + what + '). Build with -s ASSERTIONS=1 for more info.';
  
    // Use a wasm runtime error, because a JS error might be seen as a foreign
    // exception, which means we'd run destructors on it. We need the error to
    // simply make the program stop.
    var e = new WebAssembly.RuntimeError(what);
  
    // Throw the error whether or not MODULARIZE is set because abort is used
    // in code paths apart from instantiation where an exception is expected
    // to be thrown when abort is called.
    throw e;
  }
  
  
  var memoryInitializer = null;
  
  
  
  
  
  
  
  
  
  
  
  function hasPrefix(str, prefix) {
    return String.prototype.startsWith ?
        str.startsWith(prefix) :
        str.indexOf(prefix) === 0;
  }
  
  // Prefix of data URIs emitted by SINGLE_FILE and related options.
  var dataURIPrefix = 'data:application/octet-stream;base64,';
  
  // Indicates whether filename is a base64 data URI.
  function isDataURI(filename) {
    return hasPrefix(filename, dataURIPrefix);
  }
  
  var fileURIPrefix = "file://";
  
  // Indicates whether filename is delivered via file protocol (as opposed to http/https)
  function isFileURI(filename) {
    return hasPrefix(filename, fileURIPrefix);
  }
  
  
  
  
  var wasmBinaryFile = 'index.wasm';
  if (!isDataURI(wasmBinaryFile)) {
    wasmBinaryFile = locateFile(wasmBinaryFile);
  }
  
  function getBinary() {
    try {
      if (wasmBinary) {
        return new Uint8Array(wasmBinary);
      }
  
      if (readBinary) {
        return readBinary(wasmBinaryFile);
      } else {
        throw "both async and sync fetching of the wasm failed";
      }
    }
    catch (err) {
      abort(err);
    }
  }
  
  function getBinaryPromise() {
    // If we don't have the binary yet, and have the Fetch api, use that;
    // in some environments, like Electron's render process, Fetch api may be present, but have a different context than expected, let's only use it on the Web
    if (!wasmBinary && (ENVIRONMENT_IS_WEB || ENVIRONMENT_IS_WORKER) && typeof fetch === 'function'
        // Let's not use fetch to get objects over file:// as it's most likely Cordova which doesn't support fetch for file://
        && !isFileURI(wasmBinaryFile)
        ) {
      return fetch(wasmBinaryFile, { credentials: 'same-origin' }).then(function(response) {
        if (!response['ok']) {
          throw "failed to load wasm binary file at '" + wasmBinaryFile + "'";
        }
        return response['arrayBuffer']();
      }).catch(function () {
        return getBinary();
      });
    }
    // Otherwise, getBinary should be able to get it synchronously
    return Promise.resolve().then(getBinary);
  }
  
  
  
  // Create the wasm instance.
  // Receives the wasm imports, returns the exports.
  function createWasm() {
    // prepare imports
    var info = {
      'env': asmLibraryArg,
      'wasi_snapshot_preview1': asmLibraryArg
    };
    // Load the wasm module and create an instance of using native support in the JS engine.
    // handle a generated wasm instance, receiving its exports and
    // performing other necessary setup
    /** @param {WebAssembly.Module=} module*/
    function receiveInstance(instance, module) {
      var exports = instance.exports;
      Module['asm'] = exports;
      removeRunDependency('wasm-instantiate');
    }
    // we can't run yet (except in a pthread, where we have a custom sync instantiator)
    addRunDependency('wasm-instantiate');
  
  
    function receiveInstantiatedSource(output) {
      // 'output' is a WebAssemblyInstantiatedSource object which has both the module and instance.
      // receiveInstance() will swap in the exports (to Module.asm) so they can be called
      // TODO: Due to Closure regression https://github.com/google/closure-compiler/issues/3193, the above line no longer optimizes out down to the following line.
      // When the regression is fixed, can restore the above USE_PTHREADS-enabled path.
      receiveInstance(output['instance']);
    }
  
  
    function instantiateArrayBuffer(receiver) {
      return getBinaryPromise().then(function(binary) {
        return WebAssembly.instantiate(binary, info);
      }).then(receiver, function(reason) {
        err('failed to asynchronously prepare wasm: ' + reason);
  
  
        abort(reason);
      });
    }
  
    // Prefer streaming instantiation if available.
    function instantiateAsync() {
      if (!wasmBinary &&
          typeof WebAssembly.instantiateStreaming === 'function' &&
          !isDataURI(wasmBinaryFile) &&
          // Don't use streaming for file:// delivered objects in a webview, fetch them synchronously.
          !isFileURI(wasmBinaryFile) &&
          typeof fetch === 'function') {
        fetch(wasmBinaryFile, { credentials: 'same-origin' }).then(function (response) {
          var result = WebAssembly.instantiateStreaming(response, info);
          return result.then(receiveInstantiatedSource, function(reason) {
              // We expect the most common failure cause to be a bad MIME type for the binary,
              // in which case falling back to ArrayBuffer instantiation should work.
              err('wasm streaming compile failed: ' + reason);
              err('falling back to ArrayBuffer instantiation');
              return instantiateArrayBuffer(receiveInstantiatedSource);
            });
        });
      } else {
        return instantiateArrayBuffer(receiveInstantiatedSource);
      }
    }
    // User shell pages can write their own Module.instantiateWasm = function(imports, successCallback) callback
    // to manually instantiate the Wasm module themselves. This allows pages to run the instantiation parallel
    // to any other async startup actions they are performing.
    if (Module['instantiateWasm']) {
      try {
        var exports = Module['instantiateWasm'](info, receiveInstance);
        return exports;
      } catch(e) {
        err('Module.instantiateWasm callback failed with error: ' + e);
        return false;
      }
    }
  
    instantiateAsync();
    return {}; // no exports yet; we'll fill them in later
  }
  
  // Globals used by JS i64 conversions
  var tempDouble;
  var tempI64;
  
  // === Body ===
  
  var ASM_CONSTS = {
    33162: function($0) {var str = UTF8ToString($0) + '\n\n' + 'Abort/Retry/Ignore/AlwaysIgnore? [ariA] :'; var reply = window.prompt(str, "i"); if (reply === null) { reply = "i"; } return allocate(intArrayFromString(reply), 'i8', ALLOC_NORMAL);},  
   72956: function($0, $1, $2) {var w = $0; var h = $1; var pixels = $2; if (!Module['SDL2']) Module['SDL2'] = {}; var SDL2 = Module['SDL2']; if (SDL2.ctxCanvas !== Module['canvas']) { SDL2.ctx = Module['createContext'](Module['canvas'], false, true); SDL2.ctxCanvas = Module['canvas']; } if (SDL2.w !== w || SDL2.h !== h || SDL2.imageCtx !== SDL2.ctx) { SDL2.image = SDL2.ctx.createImageData(w, h); SDL2.w = w; SDL2.h = h; SDL2.imageCtx = SDL2.ctx; } var data = SDL2.image.data; var src = pixels >> 2; var dst = 0; var num; if (typeof CanvasPixelArray !== 'undefined' && data instanceof CanvasPixelArray) { num = data.length; while (dst < num) { var val = HEAP32[src]; data[dst ] = val & 0xff; data[dst+1] = (val >> 8) & 0xff; data[dst+2] = (val >> 16) & 0xff; data[dst+3] = 0xff; src++; dst += 4; } } else { if (SDL2.data32Data !== data) { SDL2.data32 = new Int32Array(data.buffer); SDL2.data8 = new Uint8Array(data.buffer); } var data32 = SDL2.data32; num = data32.length; data32.set(HEAP32.subarray(src, src + num)); var data8 = SDL2.data8; var i = 3; var j = i + 4*num; if (num % 8 == 0) { while (i < j) { data8[i] = 0xff; i = i + 4 | 0; data8[i] = 0xff; i = i + 4 | 0; data8[i] = 0xff; i = i + 4 | 0; data8[i] = 0xff; i = i + 4 | 0; data8[i] = 0xff; i = i + 4 | 0; data8[i] = 0xff; i = i + 4 | 0; data8[i] = 0xff; i = i + 4 | 0; data8[i] = 0xff; i = i + 4 | 0; } } else { while (i < j) { data8[i] = 0xff; i = i + 4 | 0; } } } SDL2.ctx.putImageData(SDL2.image, 0, 0); return 0;},  
   74435: function($0, $1, $2, $3, $4) {var w = $0; var h = $1; var hot_x = $2; var hot_y = $3; var pixels = $4; var canvas = document.createElement("canvas"); canvas.width = w; canvas.height = h; var ctx = canvas.getContext("2d"); var image = ctx.createImageData(w, h); var data = image.data; var src = pixels >> 2; var dst = 0; var num; if (typeof CanvasPixelArray !== 'undefined' && data instanceof CanvasPixelArray) { num = data.length; while (dst < num) { var val = HEAP32[src]; data[dst ] = val & 0xff; data[dst+1] = (val >> 8) & 0xff; data[dst+2] = (val >> 16) & 0xff; data[dst+3] = (val >> 24) & 0xff; src++; dst += 4; } } else { var data32 = new Int32Array(data.buffer); num = data32.length; data32.set(HEAP32.subarray(src, src + num)); } ctx.putImageData(image, 0, 0); var url = hot_x === 0 && hot_y === 0 ? "url(" + canvas.toDataURL() + "), auto" : "url(" + canvas.toDataURL() + ") " + hot_x + " " + hot_y + ", auto"; var urlBuf = _malloc(url.length + 1); stringToUTF8(url, urlBuf, url.length + 1); return urlBuf;},  
   75424: function($0) {if (Module['canvas']) { Module['canvas'].style['cursor'] = UTF8ToString($0); } return 0;},  
   75517: function() {if (Module['canvas']) { Module['canvas'].style['cursor'] = 'none'; }},  
   76742: function() {return screen.width;},  
   76769: function() {return screen.height;},  
   76797: function() {return window.innerWidth;},  
   76829: function() {return window.innerHeight;},  
   76907: function($0) {if (typeof setWindowTitle !== 'undefined') { setWindowTitle(UTF8ToString($0)); } return 0;},  
   77041: function() {if (typeof(AudioContext) !== 'undefined') { return 1; } else if (typeof(webkitAudioContext) !== 'undefined') { return 1; } return 0;},  
   77207: function() {if ((typeof(navigator.mediaDevices) !== 'undefined') && (typeof(navigator.mediaDevices.getUserMedia) !== 'undefined')) { return 1; } else if (typeof(navigator.webkitGetUserMedia) !== 'undefined') { return 1; } return 0;},  
   77433: function($0) {if(typeof(Module['SDL2']) === 'undefined') { Module['SDL2'] = {}; } var SDL2 = Module['SDL2']; if (!$0) { SDL2.audio = {}; } else { SDL2.capture = {}; } if (!SDL2.audioContext) { if (typeof(AudioContext) !== 'undefined') { SDL2.audioContext = new AudioContext(); } else if (typeof(webkitAudioContext) !== 'undefined') { SDL2.audioContext = new webkitAudioContext(); } if (SDL2.audioContext) { autoResumeAudioContext(SDL2.audioContext); } } return SDL2.audioContext === undefined ? -1 : 0;},  
   77986: function() {var SDL2 = Module['SDL2']; return SDL2.audioContext.sampleRate;},  
   78056: function($0, $1, $2, $3) {var SDL2 = Module['SDL2']; var have_microphone = function(stream) { if (SDL2.capture.silenceTimer !== undefined) { clearTimeout(SDL2.capture.silenceTimer); SDL2.capture.silenceTimer = undefined; } SDL2.capture.mediaStreamNode = SDL2.audioContext.createMediaStreamSource(stream); SDL2.capture.scriptProcessorNode = SDL2.audioContext.createScriptProcessor($1, $0, 1); SDL2.capture.scriptProcessorNode.onaudioprocess = function(audioProcessingEvent) { if ((SDL2 === undefined) || (SDL2.capture === undefined)) { return; } audioProcessingEvent.outputBuffer.getChannelData(0).fill(0.0); SDL2.capture.currentCaptureBuffer = audioProcessingEvent.inputBuffer; dynCall('vi', $2, [$3]); }; SDL2.capture.mediaStreamNode.connect(SDL2.capture.scriptProcessorNode); SDL2.capture.scriptProcessorNode.connect(SDL2.audioContext.destination); SDL2.capture.stream = stream; }; var no_microphone = function(error) { }; SDL2.capture.silenceBuffer = SDL2.audioContext.createBuffer($0, $1, SDL2.audioContext.sampleRate); SDL2.capture.silenceBuffer.getChannelData(0).fill(0.0); var silence_callback = function() { SDL2.capture.currentCaptureBuffer = SDL2.capture.silenceBuffer; dynCall('vi', $2, [$3]); }; SDL2.capture.silenceTimer = setTimeout(silence_callback, ($1 / SDL2.audioContext.sampleRate) * 1000); if ((navigator.mediaDevices !== undefined) && (navigator.mediaDevices.getUserMedia !== undefined)) { navigator.mediaDevices.getUserMedia({ audio: true, video: false }).then(have_microphone).catch(no_microphone); } else if (navigator.webkitGetUserMedia !== undefined) { navigator.webkitGetUserMedia({ audio: true, video: false }, have_microphone, no_microphone); }},  
   79708: function($0, $1, $2, $3) {var SDL2 = Module['SDL2']; SDL2.audio.scriptProcessorNode = SDL2.audioContext['createScriptProcessor']($1, 0, $0); SDL2.audio.scriptProcessorNode['onaudioprocess'] = function (e) { if ((SDL2 === undefined) || (SDL2.audio === undefined)) { return; } SDL2.audio.currentOutputBuffer = e['outputBuffer']; dynCall('vi', $2, [$3]); }; SDL2.audio.scriptProcessorNode['connect'](SDL2.audioContext['destination']);},  
   80118: function($0, $1) {var SDL2 = Module['SDL2']; var numChannels = SDL2.capture.currentCaptureBuffer.numberOfChannels; for (var c = 0; c < numChannels; ++c) { var channelData = SDL2.capture.currentCaptureBuffer.getChannelData(c); if (channelData.length != $1) { throw 'Web Audio capture buffer length mismatch! Destination size: ' + channelData.length + ' samples vs expected ' + $1 + ' samples!'; } if (numChannels == 1) { for (var j = 0; j < $1; ++j) { setValue($0 + (j * 4), channelData[j], 'float'); } } else { for (var j = 0; j < $1; ++j) { setValue($0 + (((j * numChannels) + c) * 4), channelData[j], 'float'); } } }},  
   80723: function($0, $1) {var SDL2 = Module['SDL2']; var numChannels = SDL2.audio.currentOutputBuffer['numberOfChannels']; for (var c = 0; c < numChannels; ++c) { var channelData = SDL2.audio.currentOutputBuffer['getChannelData'](c); if (channelData.length != $1) { throw 'Web Audio output buffer length mismatch! Destination size: ' + channelData.length + ' samples vs expected ' + $1 + ' samples!'; } for (var j = 0; j < $1; ++j) { channelData[j] = HEAPF32[$0 + ((j*numChannels + c) << 2) >> 2]; } }},  
   81203: function($0) {var SDL2 = Module['SDL2']; if ($0) { if (SDL2.capture.silenceTimer !== undefined) { clearTimeout(SDL2.capture.silenceTimer); } if (SDL2.capture.stream !== undefined) { var tracks = SDL2.capture.stream.getAudioTracks(); for (var i = 0; i < tracks.length; i++) { SDL2.capture.stream.removeTrack(tracks[i]); } SDL2.capture.stream = undefined; } if (SDL2.capture.scriptProcessorNode !== undefined) { SDL2.capture.scriptProcessorNode.onaudioprocess = function(audioProcessingEvent) {}; SDL2.capture.scriptProcessorNode.disconnect(); SDL2.capture.scriptProcessorNode = undefined; } if (SDL2.capture.mediaStreamNode !== undefined) { SDL2.capture.mediaStreamNode.disconnect(); SDL2.capture.mediaStreamNode = undefined; } if (SDL2.capture.silenceBuffer !== undefined) { SDL2.capture.silenceBuffer = undefined } SDL2.capture = undefined; } else { if (SDL2.audio.scriptProcessorNode != undefined) { SDL2.audio.scriptProcessorNode.disconnect(); SDL2.audio.scriptProcessorNode = undefined; } SDL2.audio = undefined; } if ((SDL2.audioContext !== undefined) && (SDL2.audio === undefined) && (SDL2.capture === undefined)) { SDL2.audioContext.close(); SDL2.audioContext = undefined; }}
  };
  
  
  
  
  // STATICTOP = STATIC_BASE + 127872;
  /* global initializers */  __ATINIT__.push({ func: function() { ___wasm_call_ctors() } });
  
  
  
  
  /* no memory initializer */
  // {{PRE_LIBRARY}}
  
  
    
    function listenOnce(object, event, func) {
        object.addEventListener(event, func, { 'once': true });
      }function autoResumeAudioContext(ctx, elements) {
        if (!elements) {
          elements = [document, document.getElementById('canvas')];
        }
        ['keydown', 'mousedown', 'touchstart'].forEach(function(event) {
          elements.forEach(function(element) {
            if (element) {
              listenOnce(element, event, function() {
                if (ctx.state === 'suspended') ctx.resume();
              });
            }
          });
        });
      }
  
    function demangle(func) {
        return func;
      }
  
    function demangleAll(text) {
        var regex =
          /\b_Z[\w\d_]+/g;
        return text.replace(regex,
          function(x) {
            var y = demangle(x);
            return x === y ? x : (y + ' [' + x + ']');
          });
      }
  
    function jsStackTrace() {
        var err = new Error();
        if (!err.stack) {
          // IE10+ special cases: It does have callstack info, but it is only populated if an Error object is thrown,
          // so try that as a special-case.
          try {
            throw new Error();
          } catch(e) {
            err = e;
          }
          if (!err.stack) {
            return '(no stack trace available)';
          }
        }
        return err.stack.toString();
      }
  
    function stackTrace() {
        var js = jsStackTrace();
        if (Module['extraStackTrace']) js += '\n' + Module['extraStackTrace']();
        return demangleAll(js);
      }
  
    function ___assert_fail(condition, filename, line, func) {
        abort('Assertion failed: ' + UTF8ToString(condition) + ', at: ' + [filename ? UTF8ToString(filename) : 'unknown filename', line, func ? UTF8ToString(func) : 'unknown function']);
      }
  
    
    var ExceptionInfoAttrs={DESTRUCTOR_OFFSET:0,REFCOUNT_OFFSET:4,TYPE_OFFSET:8,CAUGHT_OFFSET:12,RETHROWN_OFFSET:13,SIZE:16};function ___cxa_allocate_exception(size) {
        // Thrown object is prepended by exception metadata block
        return _malloc(size + ExceptionInfoAttrs.SIZE) + ExceptionInfoAttrs.SIZE;
      }
  
    
    function _atexit(func, arg) {
    
      }function ___cxa_atexit(a0,a1
    ) {
    return _atexit(a0,a1);
    }
  
    
    function ExceptionInfo(excPtr) {
        this.excPtr = excPtr;
        this.ptr = excPtr - ExceptionInfoAttrs.SIZE;
    
        this.set_type = function(type) {
          HEAP32[(((this.ptr)+(ExceptionInfoAttrs.TYPE_OFFSET))>>2)]=type;
        };
    
        this.get_type = function() {
          return HEAP32[(((this.ptr)+(ExceptionInfoAttrs.TYPE_OFFSET))>>2)];
        };
    
        this.set_destructor = function(destructor) {
          HEAP32[(((this.ptr)+(ExceptionInfoAttrs.DESTRUCTOR_OFFSET))>>2)]=destructor;
        };
    
        this.get_destructor = function() {
          return HEAP32[(((this.ptr)+(ExceptionInfoAttrs.DESTRUCTOR_OFFSET))>>2)];
        };
    
        this.set_refcount = function(refcount) {
          HEAP32[(((this.ptr)+(ExceptionInfoAttrs.REFCOUNT_OFFSET))>>2)]=refcount;
        };
    
        this.set_caught = function (caught) {
          caught = caught ? 1 : 0;
          HEAP8[(((this.ptr)+(ExceptionInfoAttrs.CAUGHT_OFFSET))>>0)]=caught;
        };
    
        this.get_caught = function () {
          return HEAP8[(((this.ptr)+(ExceptionInfoAttrs.CAUGHT_OFFSET))>>0)] != 0;
        };
    
        this.set_rethrown = function (rethrown) {
          rethrown = rethrown ? 1 : 0;
          HEAP8[(((this.ptr)+(ExceptionInfoAttrs.RETHROWN_OFFSET))>>0)]=rethrown;
        };
    
        this.get_rethrown = function () {
          return HEAP8[(((this.ptr)+(ExceptionInfoAttrs.RETHROWN_OFFSET))>>0)] != 0;
        };
    
        // Initialize native structure fields. Should be called once after allocated.
        this.init = function(type, destructor) {
          this.set_type(type);
          this.set_destructor(destructor);
          this.set_refcount(0);
          this.set_caught(false);
          this.set_rethrown(false);
        }
    
        this.add_ref = function() {
          var value = HEAP32[(((this.ptr)+(ExceptionInfoAttrs.REFCOUNT_OFFSET))>>2)];
          HEAP32[(((this.ptr)+(ExceptionInfoAttrs.REFCOUNT_OFFSET))>>2)]=value + 1;
        };
    
        // Returns true if last reference released.
        this.release_ref = function() {
          var prev = HEAP32[(((this.ptr)+(ExceptionInfoAttrs.REFCOUNT_OFFSET))>>2)];
          HEAP32[(((this.ptr)+(ExceptionInfoAttrs.REFCOUNT_OFFSET))>>2)]=prev - 1;
          return prev === 1;
        };
      }
    
    var exceptionLast=0;
    
    function __ZSt18uncaught_exceptionv() { // std::uncaught_exception()
        return __ZSt18uncaught_exceptionv.uncaught_exceptions > 0;
      }function ___cxa_throw(ptr, type, destructor) {
        var info = new ExceptionInfo(ptr);
        // Initialize ExceptionInfo content after it was allocated in __cxa_allocate_exception.
        info.init(type, destructor);
        exceptionLast = ptr;
        if (!("uncaught_exception" in __ZSt18uncaught_exceptionv)) {
          __ZSt18uncaught_exceptionv.uncaught_exceptions = 1;
        } else {
          __ZSt18uncaught_exceptionv.uncaught_exceptions++;
        }
        throw ptr;
      }
  
    
    function setErrNo(value) {
        HEAP32[((___errno_location())>>2)]=value;
        return value;
      }function ___map_file(pathname, size) {
        setErrNo(63);
        return -1;
      }
  
    
    
    var PATH={splitPath:function(filename) {
          var splitPathRe = /^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/;
          return splitPathRe.exec(filename).slice(1);
        },normalizeArray:function(parts, allowAboveRoot) {
          // if the path tries to go above the root, `up` ends up > 0
          var up = 0;
          for (var i = parts.length - 1; i >= 0; i--) {
            var last = parts[i];
            if (last === '.') {
              parts.splice(i, 1);
            } else if (last === '..') {
              parts.splice(i, 1);
              up++;
            } else if (up) {
              parts.splice(i, 1);
              up--;
            }
          }
          // if the path is allowed to go above the root, restore leading ..s
          if (allowAboveRoot) {
            for (; up; up--) {
              parts.unshift('..');
            }
          }
          return parts;
        },normalize:function(path) {
          var isAbsolute = path.charAt(0) === '/',
              trailingSlash = path.substr(-1) === '/';
          // Normalize the path
          path = PATH.normalizeArray(path.split('/').filter(function(p) {
            return !!p;
          }), !isAbsolute).join('/');
          if (!path && !isAbsolute) {
            path = '.';
          }
          if (path && trailingSlash) {
            path += '/';
          }
          return (isAbsolute ? '/' : '') + path;
        },dirname:function(path) {
          var result = PATH.splitPath(path),
              root = result[0],
              dir = result[1];
          if (!root && !dir) {
            // No dirname whatsoever
            return '.';
          }
          if (dir) {
            // It has a dirname, strip trailing slash
            dir = dir.substr(0, dir.length - 1);
          }
          return root + dir;
        },basename:function(path) {
          // EMSCRIPTEN return '/'' for '/', not an empty string
          if (path === '/') return '/';
          path = PATH.normalize(path);
          path = path.replace(/\/$/, "");
          var lastSlash = path.lastIndexOf('/');
          if (lastSlash === -1) return path;
          return path.substr(lastSlash+1);
        },extname:function(path) {
          return PATH.splitPath(path)[3];
        },join:function() {
          var paths = Array.prototype.slice.call(arguments, 0);
          return PATH.normalize(paths.join('/'));
        },join2:function(l, r) {
          return PATH.normalize(l + '/' + r);
        }};
    
    
    var PATH_FS={resolve:function() {
          var resolvedPath = '',
            resolvedAbsolute = false;
          for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
            var path = (i >= 0) ? arguments[i] : FS.cwd();
            // Skip empty and invalid entries
            if (typeof path !== 'string') {
              throw new TypeError('Arguments to path.resolve must be strings');
            } else if (!path) {
              return ''; // an invalid portion invalidates the whole thing
            }
            resolvedPath = path + '/' + resolvedPath;
            resolvedAbsolute = path.charAt(0) === '/';
          }
          // At this point the path should be resolved to a full absolute path, but
          // handle relative paths to be safe (might happen when process.cwd() fails)
          resolvedPath = PATH.normalizeArray(resolvedPath.split('/').filter(function(p) {
            return !!p;
          }), !resolvedAbsolute).join('/');
          return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
        },relative:function(from, to) {
          from = PATH_FS.resolve(from).substr(1);
          to = PATH_FS.resolve(to).substr(1);
          function trim(arr) {
            var start = 0;
            for (; start < arr.length; start++) {
              if (arr[start] !== '') break;
            }
            var end = arr.length - 1;
            for (; end >= 0; end--) {
              if (arr[end] !== '') break;
            }
            if (start > end) return [];
            return arr.slice(start, end - start + 1);
          }
          var fromParts = trim(from.split('/'));
          var toParts = trim(to.split('/'));
          var length = Math.min(fromParts.length, toParts.length);
          var samePartsLength = length;
          for (var i = 0; i < length; i++) {
            if (fromParts[i] !== toParts[i]) {
              samePartsLength = i;
              break;
            }
          }
          var outputParts = [];
          for (var i = samePartsLength; i < fromParts.length; i++) {
            outputParts.push('..');
          }
          outputParts = outputParts.concat(toParts.slice(samePartsLength));
          return outputParts.join('/');
        }};
    
    var TTY={ttys:[],init:function () {
          // https://github.com/emscripten-core/emscripten/pull/1555
          // if (ENVIRONMENT_IS_NODE) {
          //   // currently, FS.init does not distinguish if process.stdin is a file or TTY
          //   // device, it always assumes it's a TTY device. because of this, we're forcing
          //   // process.stdin to UTF8 encoding to at least make stdin reading compatible
          //   // with text files until FS.init can be refactored.
          //   process['stdin']['setEncoding']('utf8');
          // }
        },shutdown:function() {
          // https://github.com/emscripten-core/emscripten/pull/1555
          // if (ENVIRONMENT_IS_NODE) {
          //   // inolen: any idea as to why node -e 'process.stdin.read()' wouldn't exit immediately (with process.stdin being a tty)?
          //   // isaacs: because now it's reading from the stream, you've expressed interest in it, so that read() kicks off a _read() which creates a ReadReq operation
          //   // inolen: I thought read() in that case was a synchronous operation that just grabbed some amount of buffered data if it exists?
          //   // isaacs: it is. but it also triggers a _read() call, which calls readStart() on the handle
          //   // isaacs: do process.stdin.pause() and i'd think it'd probably close the pending call
          //   process['stdin']['pause']();
          // }
        },register:function(dev, ops) {
          TTY.ttys[dev] = { input: [], output: [], ops: ops };
          FS.registerDevice(dev, TTY.stream_ops);
        },stream_ops:{open:function(stream) {
            var tty = TTY.ttys[stream.node.rdev];
            if (!tty) {
              throw new FS.ErrnoError(43);
            }
            stream.tty = tty;
            stream.seekable = false;
          },close:function(stream) {
            // flush any pending line data
            stream.tty.ops.flush(stream.tty);
          },flush:function(stream) {
            stream.tty.ops.flush(stream.tty);
          },read:function(stream, buffer, offset, length, pos /* ignored */) {
            if (!stream.tty || !stream.tty.ops.get_char) {
              throw new FS.ErrnoError(60);
            }
            var bytesRead = 0;
            for (var i = 0; i < length; i++) {
              var result;
              try {
                result = stream.tty.ops.get_char(stream.tty);
              } catch (e) {
                throw new FS.ErrnoError(29);
              }
              if (result === undefined && bytesRead === 0) {
                throw new FS.ErrnoError(6);
              }
              if (result === null || result === undefined) break;
              bytesRead++;
              buffer[offset+i] = result;
            }
            if (bytesRead) {
              stream.node.timestamp = Date.now();
            }
            return bytesRead;
          },write:function(stream, buffer, offset, length, pos) {
            if (!stream.tty || !stream.tty.ops.put_char) {
              throw new FS.ErrnoError(60);
            }
            try {
              for (var i = 0; i < length; i++) {
                stream.tty.ops.put_char(stream.tty, buffer[offset+i]);
              }
            } catch (e) {
              throw new FS.ErrnoError(29);
            }
            if (length) {
              stream.node.timestamp = Date.now();
            }
            return i;
          }},default_tty_ops:{get_char:function(tty) {
            if (!tty.input.length) {
              var result = null;
              if (ENVIRONMENT_IS_NODE) {
                // we will read data by chunks of BUFSIZE
                var BUFSIZE = 256;
                var buf = Buffer.alloc ? Buffer.alloc(BUFSIZE) : new Buffer(BUFSIZE);
                var bytesRead = 0;
    
                try {
                  bytesRead = nodeFS.readSync(process.stdin.fd, buf, 0, BUFSIZE, null);
                } catch(e) {
                  // Cross-platform differences: on Windows, reading EOF throws an exception, but on other OSes,
                  // reading EOF returns 0. Uniformize behavior by treating the EOF exception to return 0.
                  if (e.toString().indexOf('EOF') != -1) bytesRead = 0;
                  else throw e;
                }
    
                if (bytesRead > 0) {
                  result = buf.slice(0, bytesRead).toString('utf-8');
                } else {
                  result = null;
                }
              } else
              if (typeof window != 'undefined' &&
                typeof window.prompt == 'function') {
                // Browser.
                result = window.prompt('Input: ');  // returns null on cancel
                if (result !== null) {
                  result += '\n';
                }
              } else if (typeof readline == 'function') {
                // Command line.
                result = readline();
                if (result !== null) {
                  result += '\n';
                }
              }
              if (!result) {
                return null;
              }
              tty.input = intArrayFromString(result, true);
            }
            return tty.input.shift();
          },put_char:function(tty, val) {
            if (val === null || val === 10) {
              out(UTF8ArrayToString(tty.output, 0));
              tty.output = [];
            } else {
              if (val != 0) tty.output.push(val); // val == 0 would cut text output off in the middle.
            }
          },flush:function(tty) {
            if (tty.output && tty.output.length > 0) {
              out(UTF8ArrayToString(tty.output, 0));
              tty.output = [];
            }
          }},default_tty1_ops:{put_char:function(tty, val) {
            if (val === null || val === 10) {
              err(UTF8ArrayToString(tty.output, 0));
              tty.output = [];
            } else {
              if (val != 0) tty.output.push(val);
            }
          },flush:function(tty) {
            if (tty.output && tty.output.length > 0) {
              err(UTF8ArrayToString(tty.output, 0));
              tty.output = [];
            }
          }}};
    
    var MEMFS={ops_table:null,mount:function(mount) {
          return MEMFS.createNode(null, '/', 16384 | 511 /* 0777 */, 0);
        },createNode:function(parent, name, mode, dev) {
          if (FS.isBlkdev(mode) || FS.isFIFO(mode)) {
            // no supported
            throw new FS.ErrnoError(63);
          }
          if (!MEMFS.ops_table) {
            MEMFS.ops_table = {
              dir: {
                node: {
                  getattr: MEMFS.node_ops.getattr,
                  setattr: MEMFS.node_ops.setattr,
                  lookup: MEMFS.node_ops.lookup,
                  mknod: MEMFS.node_ops.mknod,
                  rename: MEMFS.node_ops.rename,
                  unlink: MEMFS.node_ops.unlink,
                  rmdir: MEMFS.node_ops.rmdir,
                  readdir: MEMFS.node_ops.readdir,
                  symlink: MEMFS.node_ops.symlink
                },
                stream: {
                  llseek: MEMFS.stream_ops.llseek
                }
              },
              file: {
                node: {
                  getattr: MEMFS.node_ops.getattr,
                  setattr: MEMFS.node_ops.setattr
                },
                stream: {
                  llseek: MEMFS.stream_ops.llseek,
                  read: MEMFS.stream_ops.read,
                  write: MEMFS.stream_ops.write,
                  allocate: MEMFS.stream_ops.allocate,
                  mmap: MEMFS.stream_ops.mmap,
                  msync: MEMFS.stream_ops.msync
                }
              },
              link: {
                node: {
                  getattr: MEMFS.node_ops.getattr,
                  setattr: MEMFS.node_ops.setattr,
                  readlink: MEMFS.node_ops.readlink
                },
                stream: {}
              },
              chrdev: {
                node: {
                  getattr: MEMFS.node_ops.getattr,
                  setattr: MEMFS.node_ops.setattr
                },
                stream: FS.chrdev_stream_ops
              }
            };
          }
          var node = FS.createNode(parent, name, mode, dev);
          if (FS.isDir(node.mode)) {
            node.node_ops = MEMFS.ops_table.dir.node;
            node.stream_ops = MEMFS.ops_table.dir.stream;
            node.contents = {};
          } else if (FS.isFile(node.mode)) {
            node.node_ops = MEMFS.ops_table.file.node;
            node.stream_ops = MEMFS.ops_table.file.stream;
            node.usedBytes = 0; // The actual number of bytes used in the typed array, as opposed to contents.length which gives the whole capacity.
            // When the byte data of the file is populated, this will point to either a typed array, or a normal JS array. Typed arrays are preferred
            // for performance, and used by default. However, typed arrays are not resizable like normal JS arrays are, so there is a small disk size
            // penalty involved for appending file writes that continuously grow a file similar to std::vector capacity vs used -scheme.
            node.contents = null; 
          } else if (FS.isLink(node.mode)) {
            node.node_ops = MEMFS.ops_table.link.node;
            node.stream_ops = MEMFS.ops_table.link.stream;
          } else if (FS.isChrdev(node.mode)) {
            node.node_ops = MEMFS.ops_table.chrdev.node;
            node.stream_ops = MEMFS.ops_table.chrdev.stream;
          }
          node.timestamp = Date.now();
          // add the new node to the parent
          if (parent) {
            parent.contents[name] = node;
          }
          return node;
        },getFileDataAsRegularArray:function(node) {
          if (node.contents && node.contents.subarray) {
            var arr = [];
            for (var i = 0; i < node.usedBytes; ++i) arr.push(node.contents[i]);
            return arr; // Returns a copy of the original data.
          }
          return node.contents; // No-op, the file contents are already in a JS array. Return as-is.
        },getFileDataAsTypedArray:function(node) {
          if (!node.contents) return new Uint8Array(0);
          if (node.contents.subarray) return node.contents.subarray(0, node.usedBytes); // Make sure to not return excess unused bytes.
          return new Uint8Array(node.contents);
        },expandFileStorage:function(node, newCapacity) {
          var prevCapacity = node.contents ? node.contents.length : 0;
          if (prevCapacity >= newCapacity) return; // No need to expand, the storage was already large enough.
          // Don't expand strictly to the given requested limit if it's only a very small increase, but instead geometrically grow capacity.
          // For small filesizes (<1MB), perform size*2 geometric increase, but for large sizes, do a much more conservative size*1.125 increase to
          // avoid overshooting the allocation cap by a very large margin.
          var CAPACITY_DOUBLING_MAX = 1024 * 1024;
          newCapacity = Math.max(newCapacity, (prevCapacity * (prevCapacity < CAPACITY_DOUBLING_MAX ? 2.0 : 1.125)) >>> 0);
          if (prevCapacity != 0) newCapacity = Math.max(newCapacity, 256); // At minimum allocate 256b for each file when expanding.
          var oldContents = node.contents;
          node.contents = new Uint8Array(newCapacity); // Allocate new storage.
          if (node.usedBytes > 0) node.contents.set(oldContents.subarray(0, node.usedBytes), 0); // Copy old data over to the new storage.
          return;
        },resizeFileStorage:function(node, newSize) {
          if (node.usedBytes == newSize) return;
          if (newSize == 0) {
            node.contents = null; // Fully decommit when requesting a resize to zero.
            node.usedBytes = 0;
            return;
          }
          if (!node.contents || node.contents.subarray) { // Resize a typed array if that is being used as the backing store.
            var oldContents = node.contents;
            node.contents = new Uint8Array(newSize); // Allocate new storage.
            if (oldContents) {
              node.contents.set(oldContents.subarray(0, Math.min(newSize, node.usedBytes))); // Copy old data over to the new storage.
            }
            node.usedBytes = newSize;
            return;
          }
          // Backing with a JS array.
          if (!node.contents) node.contents = [];
          if (node.contents.length > newSize) node.contents.length = newSize;
          else while (node.contents.length < newSize) node.contents.push(0);
          node.usedBytes = newSize;
        },node_ops:{getattr:function(node) {
            var attr = {};
            // device numbers reuse inode numbers.
            attr.dev = FS.isChrdev(node.mode) ? node.id : 1;
            attr.ino = node.id;
            attr.mode = node.mode;
            attr.nlink = 1;
            attr.uid = 0;
            attr.gid = 0;
            attr.rdev = node.rdev;
            if (FS.isDir(node.mode)) {
              attr.size = 4096;
            } else if (FS.isFile(node.mode)) {
              attr.size = node.usedBytes;
            } else if (FS.isLink(node.mode)) {
              attr.size = node.link.length;
            } else {
              attr.size = 0;
            }
            attr.atime = new Date(node.timestamp);
            attr.mtime = new Date(node.timestamp);
            attr.ctime = new Date(node.timestamp);
            // NOTE: In our implementation, st_blocks = Math.ceil(st_size/st_blksize),
            //       but this is not required by the standard.
            attr.blksize = 4096;
            attr.blocks = Math.ceil(attr.size / attr.blksize);
            return attr;
          },setattr:function(node, attr) {
            if (attr.mode !== undefined) {
              node.mode = attr.mode;
            }
            if (attr.timestamp !== undefined) {
              node.timestamp = attr.timestamp;
            }
            if (attr.size !== undefined) {
              MEMFS.resizeFileStorage(node, attr.size);
            }
          },lookup:function(parent, name) {
            throw FS.genericErrors[44];
          },mknod:function(parent, name, mode, dev) {
            return MEMFS.createNode(parent, name, mode, dev);
          },rename:function(old_node, new_dir, new_name) {
            // if we're overwriting a directory at new_name, make sure it's empty.
            if (FS.isDir(old_node.mode)) {
              var new_node;
              try {
                new_node = FS.lookupNode(new_dir, new_name);
              } catch (e) {
              }
              if (new_node) {
                for (var i in new_node.contents) {
                  throw new FS.ErrnoError(55);
                }
              }
            }
            // do the internal rewiring
            delete old_node.parent.contents[old_node.name];
            old_node.name = new_name;
            new_dir.contents[new_name] = old_node;
            old_node.parent = new_dir;
          },unlink:function(parent, name) {
            delete parent.contents[name];
          },rmdir:function(parent, name) {
            var node = FS.lookupNode(parent, name);
            for (var i in node.contents) {
              throw new FS.ErrnoError(55);
            }
            delete parent.contents[name];
          },readdir:function(node) {
            var entries = ['.', '..'];
            for (var key in node.contents) {
              if (!node.contents.hasOwnProperty(key)) {
                continue;
              }
              entries.push(key);
            }
            return entries;
          },symlink:function(parent, newname, oldpath) {
            var node = MEMFS.createNode(parent, newname, 511 /* 0777 */ | 40960, 0);
            node.link = oldpath;
            return node;
          },readlink:function(node) {
            if (!FS.isLink(node.mode)) {
              throw new FS.ErrnoError(28);
            }
            return node.link;
          }},stream_ops:{read:function(stream, buffer, offset, length, position) {
            var contents = stream.node.contents;
            if (position >= stream.node.usedBytes) return 0;
            var size = Math.min(stream.node.usedBytes - position, length);
            if (size > 8 && contents.subarray) { // non-trivial, and typed array
              buffer.set(contents.subarray(position, position + size), offset);
            } else {
              for (var i = 0; i < size; i++) buffer[offset + i] = contents[position + i];
            }
            return size;
          },write:function(stream, buffer, offset, length, position, canOwn) {
            // If the buffer is located in main memory (HEAP), and if
            // memory can grow, we can't hold on to references of the
            // memory buffer, as they may get invalidated. That means we
            // need to do copy its contents.
            if (buffer.buffer === HEAP8.buffer) {
              canOwn = false;
            }
    
            if (!length) return 0;
            var node = stream.node;
            node.timestamp = Date.now();
    
            if (buffer.subarray && (!node.contents || node.contents.subarray)) { // This write is from a typed array to a typed array?
              if (canOwn) {
                node.contents = buffer.subarray(offset, offset + length);
                node.usedBytes = length;
                return length;
              } else if (node.usedBytes === 0 && position === 0) { // If this is a simple first write to an empty file, do a fast set since we don't need to care about old data.
                node.contents = buffer.slice(offset, offset + length);
                node.usedBytes = length;
                return length;
              } else if (position + length <= node.usedBytes) { // Writing to an already allocated and used subrange of the file?
                node.contents.set(buffer.subarray(offset, offset + length), position);
                return length;
              }
            }
    
            // Appending to an existing file and we need to reallocate, or source data did not come as a typed array.
            MEMFS.expandFileStorage(node, position+length);
            if (node.contents.subarray && buffer.subarray) {
              // Use typed array write which is available.
              node.contents.set(buffer.subarray(offset, offset + length), position);
            } else {
              for (var i = 0; i < length; i++) {
               node.contents[position + i] = buffer[offset + i]; // Or fall back to manual write if not.
              }
            }
            node.usedBytes = Math.max(node.usedBytes, position + length);
            return length;
          },llseek:function(stream, offset, whence) {
            var position = offset;
            if (whence === 1) {
              position += stream.position;
            } else if (whence === 2) {
              if (FS.isFile(stream.node.mode)) {
                position += stream.node.usedBytes;
              }
            }
            if (position < 0) {
              throw new FS.ErrnoError(28);
            }
            return position;
          },allocate:function(stream, offset, length) {
            MEMFS.expandFileStorage(stream.node, offset + length);
            stream.node.usedBytes = Math.max(stream.node.usedBytes, offset + length);
          },mmap:function(stream, address, length, position, prot, flags) {
            // We don't currently support location hints for the address of the mapping
            assert(address === 0);
    
            if (!FS.isFile(stream.node.mode)) {
              throw new FS.ErrnoError(43);
            }
            var ptr;
            var allocated;
            var contents = stream.node.contents;
            // Only make a new copy when MAP_PRIVATE is specified.
            if (!(flags & 2) && contents.buffer === buffer) {
              // We can't emulate MAP_SHARED when the file is not backed by the buffer
              // we're mapping to (e.g. the HEAP buffer).
              allocated = false;
              ptr = contents.byteOffset;
            } else {
              // Try to avoid unnecessary slices.
              if (position > 0 || position + length < contents.length) {
                if (contents.subarray) {
                  contents = contents.subarray(position, position + length);
                } else {
                  contents = Array.prototype.slice.call(contents, position, position + length);
                }
              }
              allocated = true;
              ptr = FS.mmapAlloc(length);
              if (!ptr) {
                throw new FS.ErrnoError(48);
              }
              HEAP8.set(contents, ptr);
            }
            return { ptr: ptr, allocated: allocated };
          },msync:function(stream, buffer, offset, length, mmapFlags) {
            if (!FS.isFile(stream.node.mode)) {
              throw new FS.ErrnoError(43);
            }
            if (mmapFlags & 2) {
              // MAP_PRIVATE calls need not to be synced back to underlying fs
              return 0;
            }
    
            var bytesWritten = MEMFS.stream_ops.write(stream, buffer, 0, length, offset, false);
            // should we check if bytesWritten and length are the same?
            return 0;
          }}};var FS={root:null,mounts:[],devices:{},streams:[],nextInode:1,nameTable:null,currentPath:"/",initialized:false,ignorePermissions:true,trackingDelegate:{},tracking:{openFlags:{READ:1,WRITE:2}},ErrnoError:null,genericErrors:{},filesystems:null,syncFSRequests:0,handleFSError:function(e) {
          if (!(e instanceof FS.ErrnoError)) throw e + ' : ' + stackTrace();
          return setErrNo(e.errno);
        },lookupPath:function(path, opts) {
          path = PATH_FS.resolve(FS.cwd(), path);
          opts = opts || {};
    
          if (!path) return { path: '', node: null };
    
          var defaults = {
            follow_mount: true,
            recurse_count: 0
          };
          for (var key in defaults) {
            if (opts[key] === undefined) {
              opts[key] = defaults[key];
            }
          }
    
          if (opts.recurse_count > 8) {  // max recursive lookup of 8
            throw new FS.ErrnoError(32);
          }
    
          // split the path
          var parts = PATH.normalizeArray(path.split('/').filter(function(p) {
            return !!p;
          }), false);
    
          // start at the root
          var current = FS.root;
          var current_path = '/';
    
          for (var i = 0; i < parts.length; i++) {
            var islast = (i === parts.length-1);
            if (islast && opts.parent) {
              // stop resolving
              break;
            }
    
            current = FS.lookupNode(current, parts[i]);
            current_path = PATH.join2(current_path, parts[i]);
    
            // jump to the mount's root node if this is a mountpoint
            if (FS.isMountpoint(current)) {
              if (!islast || (islast && opts.follow_mount)) {
                current = current.mounted.root;
              }
            }
    
            // by default, lookupPath will not follow a symlink if it is the final path component.
            // setting opts.follow = true will override this behavior.
            if (!islast || opts.follow) {
              var count = 0;
              while (FS.isLink(current.mode)) {
                var link = FS.readlink(current_path);
                current_path = PATH_FS.resolve(PATH.dirname(current_path), link);
    
                var lookup = FS.lookupPath(current_path, { recurse_count: opts.recurse_count });
                current = lookup.node;
    
                if (count++ > 40) {  // limit max consecutive symlinks to 40 (SYMLOOP_MAX).
                  throw new FS.ErrnoError(32);
                }
              }
            }
          }
    
          return { path: current_path, node: current };
        },getPath:function(node) {
          var path;
          while (true) {
            if (FS.isRoot(node)) {
              var mount = node.mount.mountpoint;
              if (!path) return mount;
              return mount[mount.length-1] !== '/' ? mount + '/' + path : mount + path;
            }
            path = path ? node.name + '/' + path : node.name;
            node = node.parent;
          }
        },hashName:function(parentid, name) {
          var hash = 0;
    
    
          for (var i = 0; i < name.length; i++) {
            hash = ((hash << 5) - hash + name.charCodeAt(i)) | 0;
          }
          return ((parentid + hash) >>> 0) % FS.nameTable.length;
        },hashAddNode:function(node) {
          var hash = FS.hashName(node.parent.id, node.name);
          node.name_next = FS.nameTable[hash];
          FS.nameTable[hash] = node;
        },hashRemoveNode:function(node) {
          var hash = FS.hashName(node.parent.id, node.name);
          if (FS.nameTable[hash] === node) {
            FS.nameTable[hash] = node.name_next;
          } else {
            var current = FS.nameTable[hash];
            while (current) {
              if (current.name_next === node) {
                current.name_next = node.name_next;
                break;
              }
              current = current.name_next;
            }
          }
        },lookupNode:function(parent, name) {
          var errCode = FS.mayLookup(parent);
          if (errCode) {
            throw new FS.ErrnoError(errCode, parent);
          }
          var hash = FS.hashName(parent.id, name);
          for (var node = FS.nameTable[hash]; node; node = node.name_next) {
            var nodeName = node.name;
            if (node.parent.id === parent.id && nodeName === name) {
              return node;
            }
          }
          // if we failed to find it in the cache, call into the VFS
          return FS.lookup(parent, name);
        },createNode:function(parent, name, mode, rdev) {
          var node = new FS.FSNode(parent, name, mode, rdev);
    
          FS.hashAddNode(node);
    
          return node;
        },destroyNode:function(node) {
          FS.hashRemoveNode(node);
        },isRoot:function(node) {
          return node === node.parent;
        },isMountpoint:function(node) {
          return !!node.mounted;
        },isFile:function(mode) {
          return (mode & 61440) === 32768;
        },isDir:function(mode) {
          return (mode & 61440) === 16384;
        },isLink:function(mode) {
          return (mode & 61440) === 40960;
        },isChrdev:function(mode) {
          return (mode & 61440) === 8192;
        },isBlkdev:function(mode) {
          return (mode & 61440) === 24576;
        },isFIFO:function(mode) {
          return (mode & 61440) === 4096;
        },isSocket:function(mode) {
          return (mode & 49152) === 49152;
        },flagModes:{"r":0,"rs":1052672,"r+":2,"w":577,"wx":705,"xw":705,"w+":578,"wx+":706,"xw+":706,"a":1089,"ax":1217,"xa":1217,"a+":1090,"ax+":1218,"xa+":1218},modeStringToFlags:function(str) {
          var flags = FS.flagModes[str];
          if (typeof flags === 'undefined') {
            throw new Error('Unknown file open mode: ' + str);
          }
          return flags;
        },flagsToPermissionString:function(flag) {
          var perms = ['r', 'w', 'rw'][flag & 3];
          if ((flag & 512)) {
            perms += 'w';
          }
          return perms;
        },nodePermissions:function(node, perms) {
          if (FS.ignorePermissions) {
            return 0;
          }
          // return 0 if any user, group or owner bits are set.
          if (perms.indexOf('r') !== -1 && !(node.mode & 292)) {
            return 2;
          } else if (perms.indexOf('w') !== -1 && !(node.mode & 146)) {
            return 2;
          } else if (perms.indexOf('x') !== -1 && !(node.mode & 73)) {
            return 2;
          }
          return 0;
        },mayLookup:function(dir) {
          var errCode = FS.nodePermissions(dir, 'x');
          if (errCode) return errCode;
          if (!dir.node_ops.lookup) return 2;
          return 0;
        },mayCreate:function(dir, name) {
          try {
            var node = FS.lookupNode(dir, name);
            return 20;
          } catch (e) {
          }
          return FS.nodePermissions(dir, 'wx');
        },mayDelete:function(dir, name, isdir) {
          var node;
          try {
            node = FS.lookupNode(dir, name);
          } catch (e) {
            return e.errno;
          }
          var errCode = FS.nodePermissions(dir, 'wx');
          if (errCode) {
            return errCode;
          }
          if (isdir) {
            if (!FS.isDir(node.mode)) {
              return 54;
            }
            if (FS.isRoot(node) || FS.getPath(node) === FS.cwd()) {
              return 10;
            }
          } else {
            if (FS.isDir(node.mode)) {
              return 31;
            }
          }
          return 0;
        },mayOpen:function(node, flags) {
          if (!node) {
            return 44;
          }
          if (FS.isLink(node.mode)) {
            return 32;
          } else if (FS.isDir(node.mode)) {
            if (FS.flagsToPermissionString(flags) !== 'r' || // opening for write
                (flags & 512)) { // TODO: check for O_SEARCH? (== search for dir only)
              return 31;
            }
          }
          return FS.nodePermissions(node, FS.flagsToPermissionString(flags));
        },MAX_OPEN_FDS:4096,nextfd:function(fd_start, fd_end) {
          fd_start = fd_start || 0;
          fd_end = fd_end || FS.MAX_OPEN_FDS;
          for (var fd = fd_start; fd <= fd_end; fd++) {
            if (!FS.streams[fd]) {
              return fd;
            }
          }
          throw new FS.ErrnoError(33);
        },getStream:function(fd) {
          return FS.streams[fd];
        },createStream:function(stream, fd_start, fd_end) {
          if (!FS.FSStream) {
            FS.FSStream = /** @constructor */ function(){};
            FS.FSStream.prototype = {
              object: {
                get: function() { return this.node; },
                set: function(val) { this.node = val; }
              },
              isRead: {
                get: function() { return (this.flags & 2097155) !== 1; }
              },
              isWrite: {
                get: function() { return (this.flags & 2097155) !== 0; }
              },
              isAppend: {
                get: function() { return (this.flags & 1024); }
              }
            };
          }
          // clone it, so we can return an instance of FSStream
          var newStream = new FS.FSStream();
          for (var p in stream) {
            newStream[p] = stream[p];
          }
          stream = newStream;
          var fd = FS.nextfd(fd_start, fd_end);
          stream.fd = fd;
          FS.streams[fd] = stream;
          return stream;
        },closeStream:function(fd) {
          FS.streams[fd] = null;
        },chrdev_stream_ops:{open:function(stream) {
            var device = FS.getDevice(stream.node.rdev);
            // override node's stream ops with the device's
            stream.stream_ops = device.stream_ops;
            // forward the open call
            if (stream.stream_ops.open) {
              stream.stream_ops.open(stream);
            }
          },llseek:function() {
            throw new FS.ErrnoError(70);
          }},major:function(dev) {
          return ((dev) >> 8);
        },minor:function(dev) {
          return ((dev) & 0xff);
        },makedev:function(ma, mi) {
          return ((ma) << 8 | (mi));
        },registerDevice:function(dev, ops) {
          FS.devices[dev] = { stream_ops: ops };
        },getDevice:function(dev) {
          return FS.devices[dev];
        },getMounts:function(mount) {
          var mounts = [];
          var check = [mount];
    
          while (check.length) {
            var m = check.pop();
    
            mounts.push(m);
    
            check.push.apply(check, m.mounts);
          }
    
          return mounts;
        },syncfs:function(populate, callback) {
          if (typeof(populate) === 'function') {
            callback = populate;
            populate = false;
          }
    
          FS.syncFSRequests++;
    
          if (FS.syncFSRequests > 1) {
            err('warning: ' + FS.syncFSRequests + ' FS.syncfs operations in flight at once, probably just doing extra work');
          }
    
          var mounts = FS.getMounts(FS.root.mount);
          var completed = 0;
    
          function doCallback(errCode) {
            FS.syncFSRequests--;
            return callback(errCode);
          }
    
          function done(errCode) {
            if (errCode) {
              if (!done.errored) {
                done.errored = true;
                return doCallback(errCode);
              }
              return;
            }
            if (++completed >= mounts.length) {
              doCallback(null);
            }
          };
    
          // sync all mounts
          mounts.forEach(function (mount) {
            if (!mount.type.syncfs) {
              return done(null);
            }
            mount.type.syncfs(mount, populate, done);
          });
        },mount:function(type, opts, mountpoint) {
          var root = mountpoint === '/';
          var pseudo = !mountpoint;
          var node;
    
          if (root && FS.root) {
            throw new FS.ErrnoError(10);
          } else if (!root && !pseudo) {
            var lookup = FS.lookupPath(mountpoint, { follow_mount: false });
    
            mountpoint = lookup.path;  // use the absolute path
            node = lookup.node;
    
            if (FS.isMountpoint(node)) {
              throw new FS.ErrnoError(10);
            }
    
            if (!FS.isDir(node.mode)) {
              throw new FS.ErrnoError(54);
            }
          }
    
          var mount = {
            type: type,
            opts: opts,
            mountpoint: mountpoint,
            mounts: []
          };
    
          // create a root node for the fs
          var mountRoot = type.mount(mount);
          mountRoot.mount = mount;
          mount.root = mountRoot;
    
          if (root) {
            FS.root = mountRoot;
          } else if (node) {
            // set as a mountpoint
            node.mounted = mount;
    
            // add the new mount to the current mount's children
            if (node.mount) {
              node.mount.mounts.push(mount);
            }
          }
    
          return mountRoot;
        },unmount:function (mountpoint) {
          var lookup = FS.lookupPath(mountpoint, { follow_mount: false });
    
          if (!FS.isMountpoint(lookup.node)) {
            throw new FS.ErrnoError(28);
          }
    
          // destroy the nodes for this mount, and all its child mounts
          var node = lookup.node;
          var mount = node.mounted;
          var mounts = FS.getMounts(mount);
    
          Object.keys(FS.nameTable).forEach(function (hash) {
            var current = FS.nameTable[hash];
    
            while (current) {
              var next = current.name_next;
    
              if (mounts.indexOf(current.mount) !== -1) {
                FS.destroyNode(current);
              }
    
              current = next;
            }
          });
    
          // no longer a mountpoint
          node.mounted = null;
    
          // remove this mount from the child mounts
          var idx = node.mount.mounts.indexOf(mount);
          node.mount.mounts.splice(idx, 1);
        },lookup:function(parent, name) {
          return parent.node_ops.lookup(parent, name);
        },mknod:function(path, mode, dev) {
          var lookup = FS.lookupPath(path, { parent: true });
          var parent = lookup.node;
          var name = PATH.basename(path);
          if (!name || name === '.' || name === '..') {
            throw new FS.ErrnoError(28);
          }
          var errCode = FS.mayCreate(parent, name);
          if (errCode) {
            throw new FS.ErrnoError(errCode);
          }
          if (!parent.node_ops.mknod) {
            throw new FS.ErrnoError(63);
          }
          return parent.node_ops.mknod(parent, name, mode, dev);
        },create:function(path, mode) {
          mode = mode !== undefined ? mode : 438 /* 0666 */;
          mode &= 4095;
          mode |= 32768;
          return FS.mknod(path, mode, 0);
        },mkdir:function(path, mode) {
          mode = mode !== undefined ? mode : 511 /* 0777 */;
          mode &= 511 | 512;
          mode |= 16384;
          return FS.mknod(path, mode, 0);
        },mkdirTree:function(path, mode) {
          var dirs = path.split('/');
          var d = '';
          for (var i = 0; i < dirs.length; ++i) {
            if (!dirs[i]) continue;
            d += '/' + dirs[i];
            try {
              FS.mkdir(d, mode);
            } catch(e) {
              if (e.errno != 20) throw e;
            }
          }
        },mkdev:function(path, mode, dev) {
          if (typeof(dev) === 'undefined') {
            dev = mode;
            mode = 438 /* 0666 */;
          }
          mode |= 8192;
          return FS.mknod(path, mode, dev);
        },symlink:function(oldpath, newpath) {
          if (!PATH_FS.resolve(oldpath)) {
            throw new FS.ErrnoError(44);
          }
          var lookup = FS.lookupPath(newpath, { parent: true });
          var parent = lookup.node;
          if (!parent) {
            throw new FS.ErrnoError(44);
          }
          var newname = PATH.basename(newpath);
          var errCode = FS.mayCreate(parent, newname);
          if (errCode) {
            throw new FS.ErrnoError(errCode);
          }
          if (!parent.node_ops.symlink) {
            throw new FS.ErrnoError(63);
          }
          return parent.node_ops.symlink(parent, newname, oldpath);
        },rename:function(old_path, new_path) {
          var old_dirname = PATH.dirname(old_path);
          var new_dirname = PATH.dirname(new_path);
          var old_name = PATH.basename(old_path);
          var new_name = PATH.basename(new_path);
          // parents must exist
          var lookup, old_dir, new_dir;
    
          // let the errors from non existant directories percolate up
          lookup = FS.lookupPath(old_path, { parent: true });
          old_dir = lookup.node;
          lookup = FS.lookupPath(new_path, { parent: true });
          new_dir = lookup.node;
    
          if (!old_dir || !new_dir) throw new FS.ErrnoError(44);
          // need to be part of the same mount
          if (old_dir.mount !== new_dir.mount) {
            throw new FS.ErrnoError(75);
          }
          // source must exist
          var old_node = FS.lookupNode(old_dir, old_name);
          // old path should not be an ancestor of the new path
          var relative = PATH_FS.relative(old_path, new_dirname);
          if (relative.charAt(0) !== '.') {
            throw new FS.ErrnoError(28);
          }
          // new path should not be an ancestor of the old path
          relative = PATH_FS.relative(new_path, old_dirname);
          if (relative.charAt(0) !== '.') {
            throw new FS.ErrnoError(55);
          }
          // see if the new path already exists
          var new_node;
          try {
            new_node = FS.lookupNode(new_dir, new_name);
          } catch (e) {
            // not fatal
          }
          // early out if nothing needs to change
          if (old_node === new_node) {
            return;
          }
          // we'll need to delete the old entry
          var isdir = FS.isDir(old_node.mode);
          var errCode = FS.mayDelete(old_dir, old_name, isdir);
          if (errCode) {
            throw new FS.ErrnoError(errCode);
          }
          // need delete permissions if we'll be overwriting.
          // need create permissions if new doesn't already exist.
          errCode = new_node ?
            FS.mayDelete(new_dir, new_name, isdir) :
            FS.mayCreate(new_dir, new_name);
          if (errCode) {
            throw new FS.ErrnoError(errCode);
          }
          if (!old_dir.node_ops.rename) {
            throw new FS.ErrnoError(63);
          }
          if (FS.isMountpoint(old_node) || (new_node && FS.isMountpoint(new_node))) {
            throw new FS.ErrnoError(10);
          }
          // if we are going to change the parent, check write permissions
          if (new_dir !== old_dir) {
            errCode = FS.nodePermissions(old_dir, 'w');
            if (errCode) {
              throw new FS.ErrnoError(errCode);
            }
          }
          try {
            if (FS.trackingDelegate['willMovePath']) {
              FS.trackingDelegate['willMovePath'](old_path, new_path);
            }
          } catch(e) {
            err("FS.trackingDelegate['willMovePath']('"+old_path+"', '"+new_path+"') threw an exception: " + e.message);
          }
          // remove the node from the lookup hash
          FS.hashRemoveNode(old_node);
          // do the underlying fs rename
          try {
            old_dir.node_ops.rename(old_node, new_dir, new_name);
          } catch (e) {
            throw e;
          } finally {
            // add the node back to the hash (in case node_ops.rename
            // changed its name)
            FS.hashAddNode(old_node);
          }
          try {
            if (FS.trackingDelegate['onMovePath']) FS.trackingDelegate['onMovePath'](old_path, new_path);
          } catch(e) {
            err("FS.trackingDelegate['onMovePath']('"+old_path+"', '"+new_path+"') threw an exception: " + e.message);
          }
        },rmdir:function(path) {
          var lookup = FS.lookupPath(path, { parent: true });
          var parent = lookup.node;
          var name = PATH.basename(path);
          var node = FS.lookupNode(parent, name);
          var errCode = FS.mayDelete(parent, name, true);
          if (errCode) {
            throw new FS.ErrnoError(errCode);
          }
          if (!parent.node_ops.rmdir) {
            throw new FS.ErrnoError(63);
          }
          if (FS.isMountpoint(node)) {
            throw new FS.ErrnoError(10);
          }
          try {
            if (FS.trackingDelegate['willDeletePath']) {
              FS.trackingDelegate['willDeletePath'](path);
            }
          } catch(e) {
            err("FS.trackingDelegate['willDeletePath']('"+path+"') threw an exception: " + e.message);
          }
          parent.node_ops.rmdir(parent, name);
          FS.destroyNode(node);
          try {
            if (FS.trackingDelegate['onDeletePath']) FS.trackingDelegate['onDeletePath'](path);
          } catch(e) {
            err("FS.trackingDelegate['onDeletePath']('"+path+"') threw an exception: " + e.message);
          }
        },readdir:function(path) {
          var lookup = FS.lookupPath(path, { follow: true });
          var node = lookup.node;
          if (!node.node_ops.readdir) {
            throw new FS.ErrnoError(54);
          }
          return node.node_ops.readdir(node);
        },unlink:function(path) {
          var lookup = FS.lookupPath(path, { parent: true });
          var parent = lookup.node;
          var name = PATH.basename(path);
          var node = FS.lookupNode(parent, name);
          var errCode = FS.mayDelete(parent, name, false);
          if (errCode) {
            // According to POSIX, we should map EISDIR to EPERM, but
            // we instead do what Linux does (and we must, as we use
            // the musl linux libc).
            throw new FS.ErrnoError(errCode);
          }
          if (!parent.node_ops.unlink) {
            throw new FS.ErrnoError(63);
          }
          if (FS.isMountpoint(node)) {
            throw new FS.ErrnoError(10);
          }
          try {
            if (FS.trackingDelegate['willDeletePath']) {
              FS.trackingDelegate['willDeletePath'](path);
            }
          } catch(e) {
            err("FS.trackingDelegate['willDeletePath']('"+path+"') threw an exception: " + e.message);
          }
          parent.node_ops.unlink(parent, name);
          FS.destroyNode(node);
          try {
            if (FS.trackingDelegate['onDeletePath']) FS.trackingDelegate['onDeletePath'](path);
          } catch(e) {
            err("FS.trackingDelegate['onDeletePath']('"+path+"') threw an exception: " + e.message);
          }
        },readlink:function(path) {
          var lookup = FS.lookupPath(path);
          var link = lookup.node;
          if (!link) {
            throw new FS.ErrnoError(44);
          }
          if (!link.node_ops.readlink) {
            throw new FS.ErrnoError(28);
          }
          return PATH_FS.resolve(FS.getPath(link.parent), link.node_ops.readlink(link));
        },stat:function(path, dontFollow) {
          var lookup = FS.lookupPath(path, { follow: !dontFollow });
          var node = lookup.node;
          if (!node) {
            throw new FS.ErrnoError(44);
          }
          if (!node.node_ops.getattr) {
            throw new FS.ErrnoError(63);
          }
          return node.node_ops.getattr(node);
        },lstat:function(path) {
          return FS.stat(path, true);
        },chmod:function(path, mode, dontFollow) {
          var node;
          if (typeof path === 'string') {
            var lookup = FS.lookupPath(path, { follow: !dontFollow });
            node = lookup.node;
          } else {
            node = path;
          }
          if (!node.node_ops.setattr) {
            throw new FS.ErrnoError(63);
          }
          node.node_ops.setattr(node, {
            mode: (mode & 4095) | (node.mode & ~4095),
            timestamp: Date.now()
          });
        },lchmod:function(path, mode) {
          FS.chmod(path, mode, true);
        },fchmod:function(fd, mode) {
          var stream = FS.getStream(fd);
          if (!stream) {
            throw new FS.ErrnoError(8);
          }
          FS.chmod(stream.node, mode);
        },chown:function(path, uid, gid, dontFollow) {
          var node;
          if (typeof path === 'string') {
            var lookup = FS.lookupPath(path, { follow: !dontFollow });
            node = lookup.node;
          } else {
            node = path;
          }
          if (!node.node_ops.setattr) {
            throw new FS.ErrnoError(63);
          }
          node.node_ops.setattr(node, {
            timestamp: Date.now()
            // we ignore the uid / gid for now
          });
        },lchown:function(path, uid, gid) {
          FS.chown(path, uid, gid, true);
        },fchown:function(fd, uid, gid) {
          var stream = FS.getStream(fd);
          if (!stream) {
            throw new FS.ErrnoError(8);
          }
          FS.chown(stream.node, uid, gid);
        },truncate:function(path, len) {
          if (len < 0) {
            throw new FS.ErrnoError(28);
          }
          var node;
          if (typeof path === 'string') {
            var lookup = FS.lookupPath(path, { follow: true });
            node = lookup.node;
          } else {
            node = path;
          }
          if (!node.node_ops.setattr) {
            throw new FS.ErrnoError(63);
          }
          if (FS.isDir(node.mode)) {
            throw new FS.ErrnoError(31);
          }
          if (!FS.isFile(node.mode)) {
            throw new FS.ErrnoError(28);
          }
          var errCode = FS.nodePermissions(node, 'w');
          if (errCode) {
            throw new FS.ErrnoError(errCode);
          }
          node.node_ops.setattr(node, {
            size: len,
            timestamp: Date.now()
          });
        },ftruncate:function(fd, len) {
          var stream = FS.getStream(fd);
          if (!stream) {
            throw new FS.ErrnoError(8);
          }
          if ((stream.flags & 2097155) === 0) {
            throw new FS.ErrnoError(28);
          }
          FS.truncate(stream.node, len);
        },utime:function(path, atime, mtime) {
          var lookup = FS.lookupPath(path, { follow: true });
          var node = lookup.node;
          node.node_ops.setattr(node, {
            timestamp: Math.max(atime, mtime)
          });
        },open:function(path, flags, mode, fd_start, fd_end) {
          if (path === "") {
            throw new FS.ErrnoError(44);
          }
          flags = typeof flags === 'string' ? FS.modeStringToFlags(flags) : flags;
          mode = typeof mode === 'undefined' ? 438 /* 0666 */ : mode;
          if ((flags & 64)) {
            mode = (mode & 4095) | 32768;
          } else {
            mode = 0;
          }
          var node;
          if (typeof path === 'object') {
            node = path;
          } else {
            path = PATH.normalize(path);
            try {
              var lookup = FS.lookupPath(path, {
                follow: !(flags & 131072)
              });
              node = lookup.node;
            } catch (e) {
              // ignore
            }
          }
          // perhaps we need to create the node
          var created = false;
          if ((flags & 64)) {
            if (node) {
              // if O_CREAT and O_EXCL are set, error out if the node already exists
              if ((flags & 128)) {
                throw new FS.ErrnoError(20);
              }
            } else {
              // node doesn't exist, try to create it
              node = FS.mknod(path, mode, 0);
              created = true;
            }
          }
          if (!node) {
            throw new FS.ErrnoError(44);
          }
          // can't truncate a device
          if (FS.isChrdev(node.mode)) {
            flags &= ~512;
          }
          // if asked only for a directory, then this must be one
          if ((flags & 65536) && !FS.isDir(node.mode)) {
            throw new FS.ErrnoError(54);
          }
          // check permissions, if this is not a file we just created now (it is ok to
          // create and write to a file with read-only permissions; it is read-only
          // for later use)
          if (!created) {
            var errCode = FS.mayOpen(node, flags);
            if (errCode) {
              throw new FS.ErrnoError(errCode);
            }
          }
          // do truncation if necessary
          if ((flags & 512)) {
            FS.truncate(node, 0);
          }
          // we've already handled these, don't pass down to the underlying vfs
          flags &= ~(128 | 512 | 131072);
    
          // register the stream with the filesystem
          var stream = FS.createStream({
            node: node,
            path: FS.getPath(node),  // we want the absolute path to the node
            flags: flags,
            seekable: true,
            position: 0,
            stream_ops: node.stream_ops,
            // used by the file family libc calls (fopen, fwrite, ferror, etc.)
            ungotten: [],
            error: false
          }, fd_start, fd_end);
          // call the new stream's open function
          if (stream.stream_ops.open) {
            stream.stream_ops.open(stream);
          }
          if (Module['logReadFiles'] && !(flags & 1)) {
            if (!FS.readFiles) FS.readFiles = {};
            if (!(path in FS.readFiles)) {
              FS.readFiles[path] = 1;
              err("FS.trackingDelegate error on read file: " + path);
            }
          }
          try {
            if (FS.trackingDelegate['onOpenFile']) {
              var trackingFlags = 0;
              if ((flags & 2097155) !== 1) {
                trackingFlags |= FS.tracking.openFlags.READ;
              }
              if ((flags & 2097155) !== 0) {
                trackingFlags |= FS.tracking.openFlags.WRITE;
              }
              FS.trackingDelegate['onOpenFile'](path, trackingFlags);
            }
          } catch(e) {
            err("FS.trackingDelegate['onOpenFile']('"+path+"', flags) threw an exception: " + e.message);
          }
          return stream;
        },close:function(stream) {
          if (FS.isClosed(stream)) {
            throw new FS.ErrnoError(8);
          }
          if (stream.getdents) stream.getdents = null; // free readdir state
          try {
            if (stream.stream_ops.close) {
              stream.stream_ops.close(stream);
            }
          } catch (e) {
            throw e;
          } finally {
            FS.closeStream(stream.fd);
          }
          stream.fd = null;
        },isClosed:function(stream) {
          return stream.fd === null;
        },llseek:function(stream, offset, whence) {
          if (FS.isClosed(stream)) {
            throw new FS.ErrnoError(8);
          }
          if (!stream.seekable || !stream.stream_ops.llseek) {
            throw new FS.ErrnoError(70);
          }
          if (whence != 0 && whence != 1 && whence != 2) {
            throw new FS.ErrnoError(28);
          }
          stream.position = stream.stream_ops.llseek(stream, offset, whence);
          stream.ungotten = [];
          return stream.position;
        },read:function(stream, buffer, offset, length, position) {
          if (length < 0 || position < 0) {
            throw new FS.ErrnoError(28);
          }
          if (FS.isClosed(stream)) {
            throw new FS.ErrnoError(8);
          }
          if ((stream.flags & 2097155) === 1) {
            throw new FS.ErrnoError(8);
          }
          if (FS.isDir(stream.node.mode)) {
            throw new FS.ErrnoError(31);
          }
          if (!stream.stream_ops.read) {
            throw new FS.ErrnoError(28);
          }
          var seeking = typeof position !== 'undefined';
          if (!seeking) {
            position = stream.position;
          } else if (!stream.seekable) {
            throw new FS.ErrnoError(70);
          }
          var bytesRead = stream.stream_ops.read(stream, buffer, offset, length, position);
          if (!seeking) stream.position += bytesRead;
          return bytesRead;
        },write:function(stream, buffer, offset, length, position, canOwn) {
          if (length < 0 || position < 0) {
            throw new FS.ErrnoError(28);
          }
          if (FS.isClosed(stream)) {
            throw new FS.ErrnoError(8);
          }
          if ((stream.flags & 2097155) === 0) {
            throw new FS.ErrnoError(8);
          }
          if (FS.isDir(stream.node.mode)) {
            throw new FS.ErrnoError(31);
          }
          if (!stream.stream_ops.write) {
            throw new FS.ErrnoError(28);
          }
          if (stream.seekable && stream.flags & 1024) {
            // seek to the end before writing in append mode
            FS.llseek(stream, 0, 2);
          }
          var seeking = typeof position !== 'undefined';
          if (!seeking) {
            position = stream.position;
          } else if (!stream.seekable) {
            throw new FS.ErrnoError(70);
          }
          var bytesWritten = stream.stream_ops.write(stream, buffer, offset, length, position, canOwn);
          if (!seeking) stream.position += bytesWritten;
          try {
            if (stream.path && FS.trackingDelegate['onWriteToFile']) FS.trackingDelegate['onWriteToFile'](stream.path);
          } catch(e) {
            err("FS.trackingDelegate['onWriteToFile']('"+stream.path+"') threw an exception: " + e.message);
          }
          return bytesWritten;
        },allocate:function(stream, offset, length) {
          if (FS.isClosed(stream)) {
            throw new FS.ErrnoError(8);
          }
          if (offset < 0 || length <= 0) {
            throw new FS.ErrnoError(28);
          }
          if ((stream.flags & 2097155) === 0) {
            throw new FS.ErrnoError(8);
          }
          if (!FS.isFile(stream.node.mode) && !FS.isDir(stream.node.mode)) {
            throw new FS.ErrnoError(43);
          }
          if (!stream.stream_ops.allocate) {
            throw new FS.ErrnoError(138);
          }
          stream.stream_ops.allocate(stream, offset, length);
        },mmap:function(stream, address, length, position, prot, flags) {
          // User requests writing to file (prot & PROT_WRITE != 0).
          // Checking if we have permissions to write to the file unless
          // MAP_PRIVATE flag is set. According to POSIX spec it is possible
          // to write to file opened in read-only mode with MAP_PRIVATE flag,
          // as all modifications will be visible only in the memory of
          // the current process.
          if ((prot & 2) !== 0
              && (flags & 2) === 0
              && (stream.flags & 2097155) !== 2) {
            throw new FS.ErrnoError(2);
          }
          if ((stream.flags & 2097155) === 1) {
            throw new FS.ErrnoError(2);
          }
          if (!stream.stream_ops.mmap) {
            throw new FS.ErrnoError(43);
          }
          return stream.stream_ops.mmap(stream, address, length, position, prot, flags);
        },msync:function(stream, buffer, offset, length, mmapFlags) {
          if (!stream || !stream.stream_ops.msync) {
            return 0;
          }
          return stream.stream_ops.msync(stream, buffer, offset, length, mmapFlags);
        },munmap:function(stream) {
          return 0;
        },ioctl:function(stream, cmd, arg) {
          if (!stream.stream_ops.ioctl) {
            throw new FS.ErrnoError(59);
          }
          return stream.stream_ops.ioctl(stream, cmd, arg);
        },readFile:function(path, opts) {
          opts = opts || {};
          opts.flags = opts.flags || 'r';
          opts.encoding = opts.encoding || 'binary';
          if (opts.encoding !== 'utf8' && opts.encoding !== 'binary') {
            throw new Error('Invalid encoding type "' + opts.encoding + '"');
          }
          var ret;
          var stream = FS.open(path, opts.flags);
          var stat = FS.stat(path);
          var length = stat.size;
          var buf = new Uint8Array(length);
          FS.read(stream, buf, 0, length, 0);
          if (opts.encoding === 'utf8') {
            ret = UTF8ArrayToString(buf, 0);
          } else if (opts.encoding === 'binary') {
            ret = buf;
          }
          FS.close(stream);
          return ret;
        },writeFile:function(path, data, opts) {
          opts = opts || {};
          opts.flags = opts.flags || 'w';
          var stream = FS.open(path, opts.flags, opts.mode);
          if (typeof data === 'string') {
            var buf = new Uint8Array(lengthBytesUTF8(data)+1);
            var actualNumBytes = stringToUTF8Array(data, buf, 0, buf.length);
            FS.write(stream, buf, 0, actualNumBytes, undefined, opts.canOwn);
          } else if (ArrayBuffer.isView(data)) {
            FS.write(stream, data, 0, data.byteLength, undefined, opts.canOwn);
          } else {
            throw new Error('Unsupported data type');
          }
          FS.close(stream);
        },cwd:function() {
          return FS.currentPath;
        },chdir:function(path) {
          var lookup = FS.lookupPath(path, { follow: true });
          if (lookup.node === null) {
            throw new FS.ErrnoError(44);
          }
          if (!FS.isDir(lookup.node.mode)) {
            throw new FS.ErrnoError(54);
          }
          var errCode = FS.nodePermissions(lookup.node, 'x');
          if (errCode) {
            throw new FS.ErrnoError(errCode);
          }
          FS.currentPath = lookup.path;
        },createDefaultDirectories:function() {
          FS.mkdir('/tmp');
          FS.mkdir('/home');
          FS.mkdir('/home/web_user');
        },createDefaultDevices:function() {
          // create /dev
          FS.mkdir('/dev');
          // setup /dev/null
          FS.registerDevice(FS.makedev(1, 3), {
            read: function() { return 0; },
            write: function(stream, buffer, offset, length, pos) { return length; }
          });
          FS.mkdev('/dev/null', FS.makedev(1, 3));
          // setup /dev/tty and /dev/tty1
          // stderr needs to print output using Module['printErr']
          // so we register a second tty just for it.
          TTY.register(FS.makedev(5, 0), TTY.default_tty_ops);
          TTY.register(FS.makedev(6, 0), TTY.default_tty1_ops);
          FS.mkdev('/dev/tty', FS.makedev(5, 0));
          FS.mkdev('/dev/tty1', FS.makedev(6, 0));
          // setup /dev/[u]random
          var random_device;
          if (typeof crypto === 'object' && typeof crypto['getRandomValues'] === 'function') {
            // for modern web browsers
            var randomBuffer = new Uint8Array(1);
            random_device = function() { crypto.getRandomValues(randomBuffer); return randomBuffer[0]; };
          } else
          if (ENVIRONMENT_IS_NODE) {
            // for nodejs with or without crypto support included
            try {
              var crypto_module = require('crypto');
              // nodejs has crypto support
              random_device = function() { return crypto_module['randomBytes'](1)[0]; };
            } catch (e) {
              // nodejs doesn't have crypto support
            }
          } else
          {}
          if (!random_device) {
            // we couldn't find a proper implementation, as Math.random() is not suitable for /dev/random, see emscripten-core/emscripten/pull/7096
            random_device = function() { abort("random_device"); };
          }
          FS.createDevice('/dev', 'random', random_device);
          FS.createDevice('/dev', 'urandom', random_device);
          // we're not going to emulate the actual shm device,
          // just create the tmp dirs that reside in it commonly
          FS.mkdir('/dev/shm');
          FS.mkdir('/dev/shm/tmp');
        },createSpecialDirectories:function() {
          // create /proc/self/fd which allows /proc/self/fd/6 => readlink gives the name of the stream for fd 6 (see test_unistd_ttyname)
          FS.mkdir('/proc');
          FS.mkdir('/proc/self');
          FS.mkdir('/proc/self/fd');
          FS.mount({
            mount: function() {
              var node = FS.createNode('/proc/self', 'fd', 16384 | 511 /* 0777 */, 73);
              node.node_ops = {
                lookup: function(parent, name) {
                  var fd = +name;
                  var stream = FS.getStream(fd);
                  if (!stream) throw new FS.ErrnoError(8);
                  var ret = {
                    parent: null,
                    mount: { mountpoint: 'fake' },
                    node_ops: { readlink: function() { return stream.path } }
                  };
                  ret.parent = ret; // make it look like a simple root node
                  return ret;
                }
              };
              return node;
            }
          }, {}, '/proc/self/fd');
        },createStandardStreams:function() {
          // TODO deprecate the old functionality of a single
          // input / output callback and that utilizes FS.createDevice
          // and instead require a unique set of stream ops
    
          // by default, we symlink the standard streams to the
          // default tty devices. however, if the standard streams
          // have been overwritten we create a unique device for
          // them instead.
          if (Module['stdin']) {
            FS.createDevice('/dev', 'stdin', Module['stdin']);
          } else {
            FS.symlink('/dev/tty', '/dev/stdin');
          }
          if (Module['stdout']) {
            FS.createDevice('/dev', 'stdout', null, Module['stdout']);
          } else {
            FS.symlink('/dev/tty', '/dev/stdout');
          }
          if (Module['stderr']) {
            FS.createDevice('/dev', 'stderr', null, Module['stderr']);
          } else {
            FS.symlink('/dev/tty1', '/dev/stderr');
          }
    
          // open default streams for the stdin, stdout and stderr devices
          var stdin = FS.open('/dev/stdin', 'r');
          var stdout = FS.open('/dev/stdout', 'w');
          var stderr = FS.open('/dev/stderr', 'w');
        },ensureErrnoError:function() {
          if (FS.ErrnoError) return;
          FS.ErrnoError = /** @this{Object} */ function ErrnoError(errno, node) {
            this.node = node;
            this.setErrno = /** @this{Object} */ function(errno) {
              this.errno = errno;
            };
            this.setErrno(errno);
            this.message = 'FS error';
    
          };
          FS.ErrnoError.prototype = new Error();
          FS.ErrnoError.prototype.constructor = FS.ErrnoError;
          // Some errors may happen quite a bit, to avoid overhead we reuse them (and suffer a lack of stack info)
          [44].forEach(function(code) {
            FS.genericErrors[code] = new FS.ErrnoError(code);
            FS.genericErrors[code].stack = '<generic error, no stack>';
          });
        },staticInit:function() {
          FS.ensureErrnoError();
    
          FS.nameTable = new Array(4096);
    
          FS.mount(MEMFS, {}, '/');
    
          FS.createDefaultDirectories();
          FS.createDefaultDevices();
          FS.createSpecialDirectories();
    
          FS.filesystems = {
            'MEMFS': MEMFS,
          };
        },init:function(input, output, error) {
          FS.init.initialized = true;
    
          FS.ensureErrnoError();
    
          // Allow Module.stdin etc. to provide defaults, if none explicitly passed to us here
          Module['stdin'] = input || Module['stdin'];
          Module['stdout'] = output || Module['stdout'];
          Module['stderr'] = error || Module['stderr'];
    
          FS.createStandardStreams();
        },quit:function() {
          FS.init.initialized = false;
          // force-flush all streams, so we get musl std streams printed out
          var fflush = Module['_fflush'];
          if (fflush) fflush(0);
          // close all of our streams
          for (var i = 0; i < FS.streams.length; i++) {
            var stream = FS.streams[i];
            if (!stream) {
              continue;
            }
            FS.close(stream);
          }
        },getMode:function(canRead, canWrite) {
          var mode = 0;
          if (canRead) mode |= 292 | 73;
          if (canWrite) mode |= 146;
          return mode;
        },joinPath:function(parts, forceRelative) {
          var path = PATH.join.apply(null, parts);
          if (forceRelative && path[0] == '/') path = path.substr(1);
          return path;
        },absolutePath:function(relative, base) {
          return PATH_FS.resolve(base, relative);
        },standardizePath:function(path) {
          return PATH.normalize(path);
        },findObject:function(path, dontResolveLastLink) {
          var ret = FS.analyzePath(path, dontResolveLastLink);
          if (ret.exists) {
            return ret.object;
          } else {
            setErrNo(ret.error);
            return null;
          }
        },analyzePath:function(path, dontResolveLastLink) {
          // operate from within the context of the symlink's target
          try {
            var lookup = FS.lookupPath(path, { follow: !dontResolveLastLink });
            path = lookup.path;
          } catch (e) {
          }
          var ret = {
            isRoot: false, exists: false, error: 0, name: null, path: null, object: null,
            parentExists: false, parentPath: null, parentObject: null
          };
          try {
            var lookup = FS.lookupPath(path, { parent: true });
            ret.parentExists = true;
            ret.parentPath = lookup.path;
            ret.parentObject = lookup.node;
            ret.name = PATH.basename(path);
            lookup = FS.lookupPath(path, { follow: !dontResolveLastLink });
            ret.exists = true;
            ret.path = lookup.path;
            ret.object = lookup.node;
            ret.name = lookup.node.name;
            ret.isRoot = lookup.path === '/';
          } catch (e) {
            ret.error = e.errno;
          };
          return ret;
        },createFolder:function(parent, name, canRead, canWrite) {
          var path = PATH.join2(typeof parent === 'string' ? parent : FS.getPath(parent), name);
          var mode = FS.getMode(canRead, canWrite);
          return FS.mkdir(path, mode);
        },createPath:function(parent, path, canRead, canWrite) {
          parent = typeof parent === 'string' ? parent : FS.getPath(parent);
          var parts = path.split('/').reverse();
          while (parts.length) {
            var part = parts.pop();
            if (!part) continue;
            var current = PATH.join2(parent, part);
            try {
              FS.mkdir(current);
            } catch (e) {
              // ignore EEXIST
            }
            parent = current;
          }
          return current;
        },createFile:function(parent, name, properties, canRead, canWrite) {
          var path = PATH.join2(typeof parent === 'string' ? parent : FS.getPath(parent), name);
          var mode = FS.getMode(canRead, canWrite);
          return FS.create(path, mode);
        },createDataFile:function(parent, name, data, canRead, canWrite, canOwn) {
          var path = name ? PATH.join2(typeof parent === 'string' ? parent : FS.getPath(parent), name) : parent;
          var mode = FS.getMode(canRead, canWrite);
          var node = FS.create(path, mode);
          if (data) {
            if (typeof data === 'string') {
              var arr = new Array(data.length);
              for (var i = 0, len = data.length; i < len; ++i) arr[i] = data.charCodeAt(i);
              data = arr;
            }
            // make sure we can write to the file
            FS.chmod(node, mode | 146);
            var stream = FS.open(node, 'w');
            FS.write(stream, data, 0, data.length, 0, canOwn);
            FS.close(stream);
            FS.chmod(node, mode);
          }
          return node;
        },createDevice:function(parent, name, input, output) {
          var path = PATH.join2(typeof parent === 'string' ? parent : FS.getPath(parent), name);
          var mode = FS.getMode(!!input, !!output);
          if (!FS.createDevice.major) FS.createDevice.major = 64;
          var dev = FS.makedev(FS.createDevice.major++, 0);
          // Create a fake device that a set of stream ops to emulate
          // the old behavior.
          FS.registerDevice(dev, {
            open: function(stream) {
              stream.seekable = false;
            },
            close: function(stream) {
              // flush any pending line data
              if (output && output.buffer && output.buffer.length) {
                output(10);
              }
            },
            read: function(stream, buffer, offset, length, pos /* ignored */) {
              var bytesRead = 0;
              for (var i = 0; i < length; i++) {
                var result;
                try {
                  result = input();
                } catch (e) {
                  throw new FS.ErrnoError(29);
                }
                if (result === undefined && bytesRead === 0) {
                  throw new FS.ErrnoError(6);
                }
                if (result === null || result === undefined) break;
                bytesRead++;
                buffer[offset+i] = result;
              }
              if (bytesRead) {
                stream.node.timestamp = Date.now();
              }
              return bytesRead;
            },
            write: function(stream, buffer, offset, length, pos) {
              for (var i = 0; i < length; i++) {
                try {
                  output(buffer[offset+i]);
                } catch (e) {
                  throw new FS.ErrnoError(29);
                }
              }
              if (length) {
                stream.node.timestamp = Date.now();
              }
              return i;
            }
          });
          return FS.mkdev(path, mode, dev);
        },createLink:function(parent, name, target, canRead, canWrite) {
          var path = PATH.join2(typeof parent === 'string' ? parent : FS.getPath(parent), name);
          return FS.symlink(target, path);
        },forceLoadFile:function(obj) {
          if (obj.isDevice || obj.isFolder || obj.link || obj.contents) return true;
          var success = true;
          if (typeof XMLHttpRequest !== 'undefined') {
            throw new Error("Lazy loading should have been performed (contents set) in createLazyFile, but it was not. Lazy loading only works in web workers. Use --embed-file or --preload-file in emcc on the main thread.");
          } else if (read_) {
            // Command-line.
            try {
              // WARNING: Can't read binary files in V8's d8 or tracemonkey's js, as
              //          read() will try to parse UTF8.
              obj.contents = intArrayFromString(read_(obj.url), true);
              obj.usedBytes = obj.contents.length;
            } catch (e) {
              success = false;
            }
          } else {
            throw new Error('Cannot load without read() or XMLHttpRequest.');
          }
          if (!success) setErrNo(29);
          return success;
        },createLazyFile:function(parent, name, url, canRead, canWrite) {
          // Lazy chunked Uint8Array (implements get and length from Uint8Array). Actual getting is abstracted away for eventual reuse.
          /** @constructor */
          function LazyUint8Array() {
            this.lengthKnown = false;
            this.chunks = []; // Loaded chunks. Index is the chunk number
          }
          LazyUint8Array.prototype.get = /** @this{Object} */ function LazyUint8Array_get(idx) {
            if (idx > this.length-1 || idx < 0) {
              return undefined;
            }
            var chunkOffset = idx % this.chunkSize;
            var chunkNum = (idx / this.chunkSize)|0;
            return this.getter(chunkNum)[chunkOffset];
          };
          LazyUint8Array.prototype.setDataGetter = function LazyUint8Array_setDataGetter(getter) {
            this.getter = getter;
          };
          LazyUint8Array.prototype.cacheLength = function LazyUint8Array_cacheLength() {
            // Find length
            var xhr = new XMLHttpRequest();
            xhr.open('HEAD', url, false);
            xhr.send(null);
            if (!(xhr.status >= 200 && xhr.status < 300 || xhr.status === 304)) throw new Error("Couldn't load " + url + ". Status: " + xhr.status);
            var datalength = Number(xhr.getResponseHeader("Content-length"));
            var header;
            var hasByteServing = (header = xhr.getResponseHeader("Accept-Ranges")) && header === "bytes";
            var usesGzip = (header = xhr.getResponseHeader("Content-Encoding")) && header === "gzip";
    
            var chunkSize = 1024*1024; // Chunk size in bytes
    
            if (!hasByteServing) chunkSize = datalength;
    
            // Function to get a range from the remote URL.
            var doXHR = (function(from, to) {
              if (from > to) throw new Error("invalid range (" + from + ", " + to + ") or no bytes requested!");
              if (to > datalength-1) throw new Error("only " + datalength + " bytes available! programmer error!");
    
              // TODO: Use mozResponseArrayBuffer, responseStream, etc. if available.
              var xhr = new XMLHttpRequest();
              xhr.open('GET', url, false);
              if (datalength !== chunkSize) xhr.setRequestHeader("Range", "bytes=" + from + "-" + to);
    
              // Some hints to the browser that we want binary data.
              if (typeof Uint8Array != 'undefined') xhr.responseType = 'arraybuffer';
              if (xhr.overrideMimeType) {
                xhr.overrideMimeType('text/plain; charset=x-user-defined');
              }
    
              xhr.send(null);
              if (!(xhr.status >= 200 && xhr.status < 300 || xhr.status === 304)) throw new Error("Couldn't load " + url + ". Status: " + xhr.status);
              if (xhr.response !== undefined) {
                return new Uint8Array(/** @type{Array<number>} */(xhr.response || []));
              } else {
                return intArrayFromString(xhr.responseText || '', true);
              }
            });
            var lazyArray = this;
            lazyArray.setDataGetter(function(chunkNum) {
              var start = chunkNum * chunkSize;
              var end = (chunkNum+1) * chunkSize - 1; // including this byte
              end = Math.min(end, datalength-1); // if datalength-1 is selected, this is the last block
              if (typeof(lazyArray.chunks[chunkNum]) === "undefined") {
                lazyArray.chunks[chunkNum] = doXHR(start, end);
              }
              if (typeof(lazyArray.chunks[chunkNum]) === "undefined") throw new Error("doXHR failed!");
              return lazyArray.chunks[chunkNum];
            });
    
            if (usesGzip || !datalength) {
              // if the server uses gzip or doesn't supply the length, we have to download the whole file to get the (uncompressed) length
              chunkSize = datalength = 1; // this will force getter(0)/doXHR do download the whole file
              datalength = this.getter(0).length;
              chunkSize = datalength;
              out("LazyFiles on gzip forces download of the whole file when length is accessed");
            }
    
            this._length = datalength;
            this._chunkSize = chunkSize;
            this.lengthKnown = true;
          };
          if (typeof XMLHttpRequest !== 'undefined') {
            if (!ENVIRONMENT_IS_WORKER) throw 'Cannot do synchronous binary XHRs outside webworkers in modern browsers. Use --embed-file or --preload-file in emcc';
            var lazyArray = new LazyUint8Array();
            Object.defineProperties(lazyArray, {
              length: {
                get: /** @this{Object} */ function() {
                  if(!this.lengthKnown) {
                    this.cacheLength();
                  }
                  return this._length;
                }
              },
              chunkSize: {
                get: /** @this{Object} */ function() {
                  if(!this.lengthKnown) {
                    this.cacheLength();
                  }
                  return this._chunkSize;
                }
              }
            });
    
            var properties = { isDevice: false, contents: lazyArray };
          } else {
            var properties = { isDevice: false, url: url };
          }
    
          var node = FS.createFile(parent, name, properties, canRead, canWrite);
          // This is a total hack, but I want to get this lazy file code out of the
          // core of MEMFS. If we want to keep this lazy file concept I feel it should
          // be its own thin LAZYFS proxying calls to MEMFS.
          if (properties.contents) {
            node.contents = properties.contents;
          } else if (properties.url) {
            node.contents = null;
            node.url = properties.url;
          }
          // Add a function that defers querying the file size until it is asked the first time.
          Object.defineProperties(node, {
            usedBytes: {
              get: /** @this {FSNode} */ function() { return this.contents.length; }
            }
          });
          // override each stream op with one that tries to force load the lazy file first
          var stream_ops = {};
          var keys = Object.keys(node.stream_ops);
          keys.forEach(function(key) {
            var fn = node.stream_ops[key];
            stream_ops[key] = function forceLoadLazyFile() {
              if (!FS.forceLoadFile(node)) {
                throw new FS.ErrnoError(29);
              }
              return fn.apply(null, arguments);
            };
          });
          // use a custom read function
          stream_ops.read = function stream_ops_read(stream, buffer, offset, length, position) {
            if (!FS.forceLoadFile(node)) {
              throw new FS.ErrnoError(29);
            }
            var contents = stream.node.contents;
            if (position >= contents.length)
              return 0;
            var size = Math.min(contents.length - position, length);
            if (contents.slice) { // normal array
              for (var i = 0; i < size; i++) {
                buffer[offset + i] = contents[position + i];
              }
            } else {
              for (var i = 0; i < size; i++) { // LazyUint8Array from sync binary XHR
                buffer[offset + i] = contents.get(position + i);
              }
            }
            return size;
          };
          node.stream_ops = stream_ops;
          return node;
        },createPreloadedFile:function(parent, name, url, canRead, canWrite, onload, onerror, dontCreateFile, canOwn, preFinish) {
          Browser.init(); // XXX perhaps this method should move onto Browser?
          // TODO we should allow people to just pass in a complete filename instead
          // of parent and name being that we just join them anyways
          var fullname = name ? PATH_FS.resolve(PATH.join2(parent, name)) : parent;
          var dep = getUniqueRunDependency('cp ' + fullname); // might have several active requests for the same fullname
          function processData(byteArray) {
            function finish(byteArray) {
              if (preFinish) preFinish();
              if (!dontCreateFile) {
                FS.createDataFile(parent, name, byteArray, canRead, canWrite, canOwn);
              }
              if (onload) onload();
              removeRunDependency(dep);
            }
            var handled = false;
            Module['preloadPlugins'].forEach(function(plugin) {
              if (handled) return;
              if (plugin['canHandle'](fullname)) {
                plugin['handle'](byteArray, fullname, finish, function() {
                  if (onerror) onerror();
                  removeRunDependency(dep);
                });
                handled = true;
              }
            });
            if (!handled) finish(byteArray);
          }
          addRunDependency(dep);
          if (typeof url == 'string') {
            Browser.asyncLoad(url, function(byteArray) {
              processData(byteArray);
            }, onerror);
          } else {
            processData(url);
          }
        },indexedDB:function() {
          return window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB;
        },DB_NAME:function() {
          return 'EM_FS_' + window.location.pathname;
        },DB_VERSION:20,DB_STORE_NAME:"FILE_DATA",saveFilesToDB:function(paths, onload, onerror) {
          onload = onload || function(){};
          onerror = onerror || function(){};
          var indexedDB = FS.indexedDB();
          try {
            var openRequest = indexedDB.open(FS.DB_NAME(), FS.DB_VERSION);
          } catch (e) {
            return onerror(e);
          }
          openRequest.onupgradeneeded = function openRequest_onupgradeneeded() {
            out('creating db');
            var db = openRequest.result;
            db.createObjectStore(FS.DB_STORE_NAME);
          };
          openRequest.onsuccess = function openRequest_onsuccess() {
            var db = openRequest.result;
            var transaction = db.transaction([FS.DB_STORE_NAME], 'readwrite');
            var files = transaction.objectStore(FS.DB_STORE_NAME);
            var ok = 0, fail = 0, total = paths.length;
            function finish() {
              if (fail == 0) onload(); else onerror();
            }
            paths.forEach(function(path) {
              var putRequest = files.put(FS.analyzePath(path).object.contents, path);
              putRequest.onsuccess = function putRequest_onsuccess() { ok++; if (ok + fail == total) finish() };
              putRequest.onerror = function putRequest_onerror() { fail++; if (ok + fail == total) finish() };
            });
            transaction.onerror = onerror;
          };
          openRequest.onerror = onerror;
        },loadFilesFromDB:function(paths, onload, onerror) {
          onload = onload || function(){};
          onerror = onerror || function(){};
          var indexedDB = FS.indexedDB();
          try {
            var openRequest = indexedDB.open(FS.DB_NAME(), FS.DB_VERSION);
          } catch (e) {
            return onerror(e);
          }
          openRequest.onupgradeneeded = onerror; // no database to load from
          openRequest.onsuccess = function openRequest_onsuccess() {
            var db = openRequest.result;
            try {
              var transaction = db.transaction([FS.DB_STORE_NAME], 'readonly');
            } catch(e) {
              onerror(e);
              return;
            }
            var files = transaction.objectStore(FS.DB_STORE_NAME);
            var ok = 0, fail = 0, total = paths.length;
            function finish() {
              if (fail == 0) onload(); else onerror();
            }
            paths.forEach(function(path) {
              var getRequest = files.get(path);
              getRequest.onsuccess = function getRequest_onsuccess() {
                if (FS.analyzePath(path).exists) {
                  FS.unlink(path);
                }
                FS.createDataFile(PATH.dirname(path), PATH.basename(path), getRequest.result, true, true, true);
                ok++;
                if (ok + fail == total) finish();
              };
              getRequest.onerror = function getRequest_onerror() { fail++; if (ok + fail == total) finish() };
            });
            transaction.onerror = onerror;
          };
          openRequest.onerror = onerror;
        },mmapAlloc:function(size) {
          var alignedSize = alignMemory(size, 16384);
          var ptr = _malloc(alignedSize);
          while (size < alignedSize) HEAP8[ptr + size++] = 0;
          return ptr;
        }};var SYSCALLS={mappings:{},DEFAULT_POLLMASK:5,umask:511,calculateAt:function(dirfd, path) {
          if (path[0] !== '/') {
            // relative path
            var dir;
            if (dirfd === -100) {
              dir = FS.cwd();
            } else {
              var dirstream = FS.getStream(dirfd);
              if (!dirstream) throw new FS.ErrnoError(8);
              dir = dirstream.path;
            }
            path = PATH.join2(dir, path);
          }
          return path;
        },doStat:function(func, path, buf) {
          try {
            var stat = func(path);
          } catch (e) {
            if (e && e.node && PATH.normalize(path) !== PATH.normalize(FS.getPath(e.node))) {
              // an error occurred while trying to look up the path; we should just report ENOTDIR
              return -54;
            }
            throw e;
          }
          HEAP32[((buf)>>2)]=stat.dev;
          HEAP32[(((buf)+(4))>>2)]=0;
          HEAP32[(((buf)+(8))>>2)]=stat.ino;
          HEAP32[(((buf)+(12))>>2)]=stat.mode;
          HEAP32[(((buf)+(16))>>2)]=stat.nlink;
          HEAP32[(((buf)+(20))>>2)]=stat.uid;
          HEAP32[(((buf)+(24))>>2)]=stat.gid;
          HEAP32[(((buf)+(28))>>2)]=stat.rdev;
          HEAP32[(((buf)+(32))>>2)]=0;
          (tempI64 = [stat.size>>>0,(tempDouble=stat.size,(+(Math_abs(tempDouble))) >= 1.0 ? (tempDouble > 0.0 ? ((Math_min((+(Math_floor((tempDouble)/4294967296.0))), 4294967295.0))|0)>>>0 : (~~((+(Math_ceil((tempDouble - +(((~~(tempDouble)))>>>0))/4294967296.0)))))>>>0) : 0)],HEAP32[(((buf)+(40))>>2)]=tempI64[0],HEAP32[(((buf)+(44))>>2)]=tempI64[1]);
          HEAP32[(((buf)+(48))>>2)]=4096;
          HEAP32[(((buf)+(52))>>2)]=stat.blocks;
          HEAP32[(((buf)+(56))>>2)]=(stat.atime.getTime() / 1000)|0;
          HEAP32[(((buf)+(60))>>2)]=0;
          HEAP32[(((buf)+(64))>>2)]=(stat.mtime.getTime() / 1000)|0;
          HEAP32[(((buf)+(68))>>2)]=0;
          HEAP32[(((buf)+(72))>>2)]=(stat.ctime.getTime() / 1000)|0;
          HEAP32[(((buf)+(76))>>2)]=0;
          (tempI64 = [stat.ino>>>0,(tempDouble=stat.ino,(+(Math_abs(tempDouble))) >= 1.0 ? (tempDouble > 0.0 ? ((Math_min((+(Math_floor((tempDouble)/4294967296.0))), 4294967295.0))|0)>>>0 : (~~((+(Math_ceil((tempDouble - +(((~~(tempDouble)))>>>0))/4294967296.0)))))>>>0) : 0)],HEAP32[(((buf)+(80))>>2)]=tempI64[0],HEAP32[(((buf)+(84))>>2)]=tempI64[1]);
          return 0;
        },doMsync:function(addr, stream, len, flags, offset) {
          var buffer = HEAPU8.slice(addr, addr + len);
          FS.msync(stream, buffer, offset, len, flags);
        },doMkdir:function(path, mode) {
          // remove a trailing slash, if one - /a/b/ has basename of '', but
          // we want to create b in the context of this function
          path = PATH.normalize(path);
          if (path[path.length-1] === '/') path = path.substr(0, path.length-1);
          FS.mkdir(path, mode, 0);
          return 0;
        },doMknod:function(path, mode, dev) {
          // we don't want this in the JS API as it uses mknod to create all nodes.
          switch (mode & 61440) {
            case 32768:
            case 8192:
            case 24576:
            case 4096:
            case 49152:
              break;
            default: return -28;
          }
          FS.mknod(path, mode, dev);
          return 0;
        },doReadlink:function(path, buf, bufsize) {
          if (bufsize <= 0) return -28;
          var ret = FS.readlink(path);
    
          var len = Math.min(bufsize, lengthBytesUTF8(ret));
          var endChar = HEAP8[buf+len];
          stringToUTF8(ret, buf, bufsize+1);
          // readlink is one of the rare functions that write out a C string, but does never append a null to the output buffer(!)
          // stringToUTF8() always appends a null byte, so restore the character under the null byte after the write.
          HEAP8[buf+len] = endChar;
    
          return len;
        },doAccess:function(path, amode) {
          if (amode & ~7) {
            // need a valid mode
            return -28;
          }
          var node;
          var lookup = FS.lookupPath(path, { follow: true });
          node = lookup.node;
          if (!node) {
            return -44;
          }
          var perms = '';
          if (amode & 4) perms += 'r';
          if (amode & 2) perms += 'w';
          if (amode & 1) perms += 'x';
          if (perms /* otherwise, they've just passed F_OK */ && FS.nodePermissions(node, perms)) {
            return -2;
          }
          return 0;
        },doDup:function(path, flags, suggestFD) {
          var suggest = FS.getStream(suggestFD);
          if (suggest) FS.close(suggest);
          return FS.open(path, flags, 0, suggestFD, suggestFD).fd;
        },doReadv:function(stream, iov, iovcnt, offset) {
          var ret = 0;
          for (var i = 0; i < iovcnt; i++) {
            var ptr = HEAP32[(((iov)+(i*8))>>2)];
            var len = HEAP32[(((iov)+(i*8 + 4))>>2)];
            var curr = FS.read(stream, HEAP8,ptr, len, offset);
            if (curr < 0) return -1;
            ret += curr;
            if (curr < len) break; // nothing more to read
          }
          return ret;
        },doWritev:function(stream, iov, iovcnt, offset) {
          var ret = 0;
          for (var i = 0; i < iovcnt; i++) {
            var ptr = HEAP32[(((iov)+(i*8))>>2)];
            var len = HEAP32[(((iov)+(i*8 + 4))>>2)];
            var curr = FS.write(stream, HEAP8,ptr, len, offset);
            if (curr < 0) return -1;
            ret += curr;
          }
          return ret;
        },varargs:undefined,get:function() {
          SYSCALLS.varargs += 4;
          var ret = HEAP32[(((SYSCALLS.varargs)-(4))>>2)];
          return ret;
        },getStr:function(ptr) {
          var ret = UTF8ToString(ptr);
          return ret;
        },getStreamFromFD:function(fd) {
          var stream = FS.getStream(fd);
          if (!stream) throw new FS.ErrnoError(8);
          return stream;
        },get64:function(low, high) {
          return low;
        }};function ___sys_fcntl64(fd, cmd, varargs) {SYSCALLS.varargs = varargs;
    try {
    
        var stream = SYSCALLS.getStreamFromFD(fd);
        switch (cmd) {
          case 0: {
            var arg = SYSCALLS.get();
            if (arg < 0) {
              return -28;
            }
            var newStream;
            newStream = FS.open(stream.path, stream.flags, 0, arg);
            return newStream.fd;
          }
          case 1:
          case 2:
            return 0;  // FD_CLOEXEC makes no sense for a single process.
          case 3:
            return stream.flags;
          case 4: {
            var arg = SYSCALLS.get();
            stream.flags |= arg;
            return 0;
          }
          case 12:
          /* case 12: Currently in musl F_GETLK64 has same value as F_GETLK, so omitted to avoid duplicate case blocks. If that changes, uncomment this */ {
            
            var arg = SYSCALLS.get();
            var offset = 0;
            // We're always unlocked.
            HEAP16[(((arg)+(offset))>>1)]=2;
            return 0;
          }
          case 13:
          case 14:
          /* case 13: Currently in musl F_SETLK64 has same value as F_SETLK, so omitted to avoid duplicate case blocks. If that changes, uncomment this */
          /* case 14: Currently in musl F_SETLKW64 has same value as F_SETLKW, so omitted to avoid duplicate case blocks. If that changes, uncomment this */
            
            
            return 0; // Pretend that the locking is successful.
          case 16:
          case 8:
            return -28; // These are for sockets. We don't have them fully implemented yet.
          case 9:
            // musl trusts getown return values, due to a bug where they must be, as they overlap with errors. just return -1 here, so fnctl() returns that, and we set errno ourselves.
            setErrNo(28);
            return -1;
          default: {
            return -28;
          }
        }
      } catch (e) {
      if (typeof FS === 'undefined' || !(e instanceof FS.ErrnoError)) abort(e);
      return -e.errno;
    }
    }
  
    function ___sys_ioctl(fd, op, varargs) {SYSCALLS.varargs = varargs;
    try {
    
        var stream = SYSCALLS.getStreamFromFD(fd);
        switch (op) {
          case 21509:
          case 21505: {
            if (!stream.tty) return -59;
            return 0;
          }
          case 21510:
          case 21511:
          case 21512:
          case 21506:
          case 21507:
          case 21508: {
            if (!stream.tty) return -59;
            return 0; // no-op, not actually adjusting terminal settings
          }
          case 21519: {
            if (!stream.tty) return -59;
            var argp = SYSCALLS.get();
            HEAP32[((argp)>>2)]=0;
            return 0;
          }
          case 21520: {
            if (!stream.tty) return -59;
            return -28; // not supported
          }
          case 21531: {
            var argp = SYSCALLS.get();
            return FS.ioctl(stream, op, argp);
          }
          case 21523: {
            // TODO: in theory we should write to the winsize struct that gets
            // passed in, but for now musl doesn't read anything on it
            if (!stream.tty) return -59;
            return 0;
          }
          case 21524: {
            // TODO: technically, this ioctl call should change the window size.
            // but, since emscripten doesn't have any concept of a terminal window
            // yet, we'll just silently throw it away as we do TIOCGWINSZ
            if (!stream.tty) return -59;
            return 0;
          }
          default: abort('bad ioctl syscall ' + op);
        }
      } catch (e) {
      if (typeof FS === 'undefined' || !(e instanceof FS.ErrnoError)) abort(e);
      return -e.errno;
    }
    }
  
    
    function syscallMunmap(addr, len) {
        if ((addr | 0) === -1 || len === 0) {
          return -28;
        }
        // TODO: support unmmap'ing parts of allocations
        var info = SYSCALLS.mappings[addr];
        if (!info) return 0;
        if (len === info.len) {
          var stream = FS.getStream(info.fd);
          if (info.prot & 2) {
            SYSCALLS.doMsync(addr, stream, len, info.flags, info.offset);
          }
          FS.munmap(stream);
          SYSCALLS.mappings[addr] = null;
          if (info.allocated) {
            _free(info.malloc);
          }
        }
        return 0;
      }function ___sys_munmap(addr, len) {try {
    
        return syscallMunmap(addr, len);
      } catch (e) {
      if (typeof FS === 'undefined' || !(e instanceof FS.ErrnoError)) abort(e);
      return -e.errno;
    }
    }
  
    function ___sys_open(path, flags, varargs) {SYSCALLS.varargs = varargs;
    try {
    
        var pathname = SYSCALLS.getStr(path);
        var mode = SYSCALLS.get();
        var stream = FS.open(pathname, flags, mode);
        return stream.fd;
      } catch (e) {
      if (typeof FS === 'undefined' || !(e instanceof FS.ErrnoError)) abort(e);
      return -e.errno;
    }
    }
  
    function _abort() {
        abort();
      }
  
    
    var _emscripten_get_now;if (ENVIRONMENT_IS_NODE) {
      _emscripten_get_now = function() {
        var t = process['hrtime']();
        return t[0] * 1e3 + t[1] / 1e6;
      };
    } else if (typeof dateNow !== 'undefined') {
      _emscripten_get_now = dateNow;
    } else _emscripten_get_now = function() { return performance.now(); }
    ;
    
    var _emscripten_get_now_is_monotonic=true;;function _clock_gettime(clk_id, tp) {
        // int clock_gettime(clockid_t clk_id, struct timespec *tp);
        var now;
        if (clk_id === 0) {
          now = Date.now();
        } else if ((clk_id === 1 || clk_id === 4) && _emscripten_get_now_is_monotonic) {
          now = _emscripten_get_now();
        } else {
          setErrNo(28);
          return -1;
        }
        HEAP32[((tp)>>2)]=(now/1000)|0; // seconds
        HEAP32[(((tp)+(4))>>2)]=((now % 1000)*1000*1000)|0; // nanoseconds
        return 0;
      }
  
    function _dlclose(handle) {
        abort("To use dlopen, you need to use Emscripten's linking support, see https://github.com/emscripten-core/emscripten/wiki/Linking");
      }
  
    
    
    
    
    function _emscripten_set_main_loop_timing(mode, value) {
        Browser.mainLoop.timingMode = mode;
        Browser.mainLoop.timingValue = value;
    
        if (!Browser.mainLoop.func) {
          return 1; // Return non-zero on failure, can't set timing mode when there is no main loop.
        }
    
        if (mode == 0 /*EM_TIMING_SETTIMEOUT*/) {
          Browser.mainLoop.scheduler = function Browser_mainLoop_scheduler_setTimeout() {
            var timeUntilNextTick = Math.max(0, Browser.mainLoop.tickStartTime + value - _emscripten_get_now())|0;
            setTimeout(Browser.mainLoop.runner, timeUntilNextTick); // doing this each time means that on exception, we stop
          };
          Browser.mainLoop.method = 'timeout';
        } else if (mode == 1 /*EM_TIMING_RAF*/) {
          Browser.mainLoop.scheduler = function Browser_mainLoop_scheduler_rAF() {
            Browser.requestAnimationFrame(Browser.mainLoop.runner);
          };
          Browser.mainLoop.method = 'rAF';
        } else if (mode == 2 /*EM_TIMING_SETIMMEDIATE*/) {
          if (typeof setImmediate === 'undefined') {
            // Emulate setImmediate. (note: not a complete polyfill, we don't emulate clearImmediate() to keep code size to minimum, since not needed)
            var setImmediates = [];
            var emscriptenMainLoopMessageId = 'setimmediate';
            var Browser_setImmediate_messageHandler = function(event) {
              // When called in current thread or Worker, the main loop ID is structured slightly different to accommodate for --proxy-to-worker runtime listening to Worker events,
              // so check for both cases.
              if (event.data === emscriptenMainLoopMessageId || event.data.target === emscriptenMainLoopMessageId) {
                event.stopPropagation();
                setImmediates.shift()();
              }
            }
            addEventListener("message", Browser_setImmediate_messageHandler, true);
            setImmediate = /** @type{function(function(): ?, ...?): number} */(function Browser_emulated_setImmediate(func) {
              setImmediates.push(func);
              if (ENVIRONMENT_IS_WORKER) {
                if (Module['setImmediates'] === undefined) Module['setImmediates'] = [];
                Module['setImmediates'].push(func);
                postMessage({target: emscriptenMainLoopMessageId}); // In --proxy-to-worker, route the message via proxyClient.js
              } else postMessage(emscriptenMainLoopMessageId, "*"); // On the main thread, can just send the message to itself.
            })
          }
          Browser.mainLoop.scheduler = function Browser_mainLoop_scheduler_setImmediate() {
            setImmediate(Browser.mainLoop.runner);
          };
          Browser.mainLoop.method = 'immediate';
        }
        return 0;
      }/** @param {number|boolean=} noSetTiming */
    function _emscripten_set_main_loop(func, fps, simulateInfiniteLoop, arg, noSetTiming) {
        noExitRuntime = true;
    
        assert(!Browser.mainLoop.func, 'emscripten_set_main_loop: there can only be one main loop function at once: call emscripten_cancel_main_loop to cancel the previous one before setting a new one with different parameters.');
    
        Browser.mainLoop.func = func;
        Browser.mainLoop.arg = arg;
    
        var browserIterationFunc;
        if (typeof arg !== 'undefined') {
          browserIterationFunc = function() {
            Module['dynCall_vi'](func, arg);
          };
        } else {
          browserIterationFunc = function() {
            Module['dynCall_v'](func);
          };
        }
    
        var thisMainLoopId = Browser.mainLoop.currentlyRunningMainloop;
    
        Browser.mainLoop.runner = function Browser_mainLoop_runner() {
          if (ABORT) return;
          if (Browser.mainLoop.queue.length > 0) {
            var start = Date.now();
            var blocker = Browser.mainLoop.queue.shift();
            blocker.func(blocker.arg);
            if (Browser.mainLoop.remainingBlockers) {
              var remaining = Browser.mainLoop.remainingBlockers;
              var next = remaining%1 == 0 ? remaining-1 : Math.floor(remaining);
              if (blocker.counted) {
                Browser.mainLoop.remainingBlockers = next;
              } else {
                // not counted, but move the progress along a tiny bit
                next = next + 0.5; // do not steal all the next one's progress
                Browser.mainLoop.remainingBlockers = (8*remaining + next)/9;
              }
            }
            console.log('main loop blocker "' + blocker.name + '" took ' + (Date.now() - start) + ' ms'); //, left: ' + Browser.mainLoop.remainingBlockers);
            Browser.mainLoop.updateStatus();
    
            // catches pause/resume main loop from blocker execution
            if (thisMainLoopId < Browser.mainLoop.currentlyRunningMainloop) return;
    
            setTimeout(Browser.mainLoop.runner, 0);
            return;
          }
    
          // catch pauses from non-main loop sources
          if (thisMainLoopId < Browser.mainLoop.currentlyRunningMainloop) return;
    
          // Implement very basic swap interval control
          Browser.mainLoop.currentFrameNumber = Browser.mainLoop.currentFrameNumber + 1 | 0;
          if (Browser.mainLoop.timingMode == 1/*EM_TIMING_RAF*/ && Browser.mainLoop.timingValue > 1 && Browser.mainLoop.currentFrameNumber % Browser.mainLoop.timingValue != 0) {
            // Not the scheduled time to render this frame - skip.
            Browser.mainLoop.scheduler();
            return;
          } else if (Browser.mainLoop.timingMode == 0/*EM_TIMING_SETTIMEOUT*/) {
            Browser.mainLoop.tickStartTime = _emscripten_get_now();
          }
    
          // Signal GL rendering layer that processing of a new frame is about to start. This helps it optimize
          // VBO double-buffering and reduce GPU stalls.
    
    
    
    
          Browser.mainLoop.runIter(browserIterationFunc);
    
    
          // catch pauses from the main loop itself
          if (thisMainLoopId < Browser.mainLoop.currentlyRunningMainloop) return;
    
          // Queue new audio data. This is important to be right after the main loop invocation, so that we will immediately be able
          // to queue the newest produced audio samples.
          // TODO: Consider adding pre- and post- rAF callbacks so that GL.newRenderingFrameStarted() and SDL.audio.queueNewAudioData()
          //       do not need to be hardcoded into this function, but can be more generic.
          if (typeof SDL === 'object' && SDL.audio && SDL.audio.queueNewAudioData) SDL.audio.queueNewAudioData();
    
          Browser.mainLoop.scheduler();
        }
    
        if (!noSetTiming) {
          if (fps && fps > 0) _emscripten_set_main_loop_timing(0/*EM_TIMING_SETTIMEOUT*/, 1000.0 / fps);
          else _emscripten_set_main_loop_timing(1/*EM_TIMING_RAF*/, 1); // Do rAF by rendering each frame (no decimating)
    
          Browser.mainLoop.scheduler();
        }
    
        if (simulateInfiniteLoop) {
          throw 'unwind';
        }
      }var Browser={mainLoop:{scheduler:null,method:"",currentlyRunningMainloop:0,func:null,arg:0,timingMode:0,timingValue:0,currentFrameNumber:0,queue:[],pause:function() {
            Browser.mainLoop.scheduler = null;
            Browser.mainLoop.currentlyRunningMainloop++; // Incrementing this signals the previous main loop that it's now become old, and it must return.
          },resume:function() {
            Browser.mainLoop.currentlyRunningMainloop++;
            var timingMode = Browser.mainLoop.timingMode;
            var timingValue = Browser.mainLoop.timingValue;
            var func = Browser.mainLoop.func;
            Browser.mainLoop.func = null;
            _emscripten_set_main_loop(func, 0, false, Browser.mainLoop.arg, true /* do not set timing and call scheduler, we will do it on the next lines */);
            _emscripten_set_main_loop_timing(timingMode, timingValue);
            Browser.mainLoop.scheduler();
          },updateStatus:function() {
            if (Module['setStatus']) {
              var message = Module['statusMessage'] || 'Please wait...';
              var remaining = Browser.mainLoop.remainingBlockers;
              var expected = Browser.mainLoop.expectedBlockers;
              if (remaining) {
                if (remaining < expected) {
                  Module['setStatus'](message + ' (' + (expected - remaining) + '/' + expected + ')');
                } else {
                  Module['setStatus'](message);
                }
              } else {
                Module['setStatus']('');
              }
            }
          },runIter:function(func) {
            if (ABORT) return;
            if (Module['preMainLoop']) {
              var preRet = Module['preMainLoop']();
              if (preRet === false) {
                return; // |return false| skips a frame
              }
            }
            try {
              func();
            } catch (e) {
              if (e instanceof ExitStatus) {
                return;
              } else if (e == 'unwind') {
                return;
              } else {
                if (e && typeof e === 'object' && e.stack) err('exception thrown: ' + [e, e.stack]);
                throw e;
              }
            }
            if (Module['postMainLoop']) Module['postMainLoop']();
          }},isFullscreen:false,pointerLock:false,moduleContextCreatedCallbacks:[],workers:[],init:function() {
          if (!Module["preloadPlugins"]) Module["preloadPlugins"] = []; // needs to exist even in workers
    
          if (Browser.initted) return;
          Browser.initted = true;
    
          try {
            new Blob();
            Browser.hasBlobConstructor = true;
          } catch(e) {
            Browser.hasBlobConstructor = false;
            console.log("warning: no blob constructor, cannot create blobs with mimetypes");
          }
          Browser.BlobBuilder = typeof MozBlobBuilder != "undefined" ? MozBlobBuilder : (typeof WebKitBlobBuilder != "undefined" ? WebKitBlobBuilder : (!Browser.hasBlobConstructor ? console.log("warning: no BlobBuilder") : null));
          Browser.URLObject = typeof window != "undefined" ? (window.URL ? window.URL : window.webkitURL) : undefined;
          if (!Module.noImageDecoding && typeof Browser.URLObject === 'undefined') {
            console.log("warning: Browser does not support creating object URLs. Built-in browser image decoding will not be available.");
            Module.noImageDecoding = true;
          }
    
          // Support for plugins that can process preloaded files. You can add more of these to
          // your app by creating and appending to Module.preloadPlugins.
          //
          // Each plugin is asked if it can handle a file based on the file's name. If it can,
          // it is given the file's raw data. When it is done, it calls a callback with the file's
          // (possibly modified) data. For example, a plugin might decompress a file, or it
          // might create some side data structure for use later (like an Image element, etc.).
    
          var imagePlugin = {};
          imagePlugin['canHandle'] = function imagePlugin_canHandle(name) {
            return !Module.noImageDecoding && /\.(jpg|jpeg|png|bmp)$/i.test(name);
          };
          imagePlugin['handle'] = function imagePlugin_handle(byteArray, name, onload, onerror) {
            var b = null;
            if (Browser.hasBlobConstructor) {
              try {
                b = new Blob([byteArray], { type: Browser.getMimetype(name) });
                if (b.size !== byteArray.length) { // Safari bug #118630
                  // Safari's Blob can only take an ArrayBuffer
                  b = new Blob([(new Uint8Array(byteArray)).buffer], { type: Browser.getMimetype(name) });
                }
              } catch(e) {
                warnOnce('Blob constructor present but fails: ' + e + '; falling back to blob builder');
              }
            }
            if (!b) {
              var bb = new Browser.BlobBuilder();
              bb.append((new Uint8Array(byteArray)).buffer); // we need to pass a buffer, and must copy the array to get the right data range
              b = bb.getBlob();
            }
            var url = Browser.URLObject.createObjectURL(b);
            var img = new Image();
            img.onload = function img_onload() {
              assert(img.complete, 'Image ' + name + ' could not be decoded');
              var canvas = document.createElement('canvas');
              canvas.width = img.width;
              canvas.height = img.height;
              var ctx = canvas.getContext('2d');
              ctx.drawImage(img, 0, 0);
              Module["preloadedImages"][name] = canvas;
              Browser.URLObject.revokeObjectURL(url);
              if (onload) onload(byteArray);
            };
            img.onerror = function img_onerror(event) {
              console.log('Image ' + url + ' could not be decoded');
              if (onerror) onerror();
            };
            img.src = url;
          };
          Module['preloadPlugins'].push(imagePlugin);
    
          var audioPlugin = {};
          audioPlugin['canHandle'] = function audioPlugin_canHandle(name) {
            return !Module.noAudioDecoding && name.substr(-4) in { '.ogg': 1, '.wav': 1, '.mp3': 1 };
          };
          audioPlugin['handle'] = function audioPlugin_handle(byteArray, name, onload, onerror) {
            var done = false;
            function finish(audio) {
              if (done) return;
              done = true;
              Module["preloadedAudios"][name] = audio;
              if (onload) onload(byteArray);
            }
            function fail() {
              if (done) return;
              done = true;
              Module["preloadedAudios"][name] = new Audio(); // empty shim
              if (onerror) onerror();
            }
            if (Browser.hasBlobConstructor) {
              try {
                var b = new Blob([byteArray], { type: Browser.getMimetype(name) });
              } catch(e) {
                return fail();
              }
              var url = Browser.URLObject.createObjectURL(b); // XXX we never revoke this!
              var audio = new Audio();
              audio.addEventListener('canplaythrough', function() { finish(audio) }, false); // use addEventListener due to chromium bug 124926
              audio.onerror = function audio_onerror(event) {
                if (done) return;
                console.log('warning: browser could not fully decode audio ' + name + ', trying slower base64 approach');
                function encode64(data) {
                  var BASE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
                  var PAD = '=';
                  var ret = '';
                  var leftchar = 0;
                  var leftbits = 0;
                  for (var i = 0; i < data.length; i++) {
                    leftchar = (leftchar << 8) | data[i];
                    leftbits += 8;
                    while (leftbits >= 6) {
                      var curr = (leftchar >> (leftbits-6)) & 0x3f;
                      leftbits -= 6;
                      ret += BASE[curr];
                    }
                  }
                  if (leftbits == 2) {
                    ret += BASE[(leftchar&3) << 4];
                    ret += PAD + PAD;
                  } else if (leftbits == 4) {
                    ret += BASE[(leftchar&0xf) << 2];
                    ret += PAD;
                  }
                  return ret;
                }
                audio.src = 'data:audio/x-' + name.substr(-3) + ';base64,' + encode64(byteArray);
                finish(audio); // we don't wait for confirmation this worked - but it's worth trying
              };
              audio.src = url;
              // workaround for chrome bug 124926 - we do not always get oncanplaythrough or onerror
              Browser.safeSetTimeout(function() {
                finish(audio); // try to use it even though it is not necessarily ready to play
              }, 10000);
            } else {
              return fail();
            }
          };
          Module['preloadPlugins'].push(audioPlugin);
    
    
          // Canvas event setup
    
          function pointerLockChange() {
            Browser.pointerLock = document['pointerLockElement'] === Module['canvas'] ||
                                  document['mozPointerLockElement'] === Module['canvas'] ||
                                  document['webkitPointerLockElement'] === Module['canvas'] ||
                                  document['msPointerLockElement'] === Module['canvas'];
          }
          var canvas = Module['canvas'];
          if (canvas) {
            // forced aspect ratio can be enabled by defining 'forcedAspectRatio' on Module
            // Module['forcedAspectRatio'] = 4 / 3;
    
            canvas.requestPointerLock = canvas['requestPointerLock'] ||
                                        canvas['mozRequestPointerLock'] ||
                                        canvas['webkitRequestPointerLock'] ||
                                        canvas['msRequestPointerLock'] ||
                                        function(){};
            canvas.exitPointerLock = document['exitPointerLock'] ||
                                     document['mozExitPointerLock'] ||
                                     document['webkitExitPointerLock'] ||
                                     document['msExitPointerLock'] ||
                                     function(){}; // no-op if function does not exist
            canvas.exitPointerLock = canvas.exitPointerLock.bind(document);
    
            document.addEventListener('pointerlockchange', pointerLockChange, false);
            document.addEventListener('mozpointerlockchange', pointerLockChange, false);
            document.addEventListener('webkitpointerlockchange', pointerLockChange, false);
            document.addEventListener('mspointerlockchange', pointerLockChange, false);
    
            if (Module['elementPointerLock']) {
              canvas.addEventListener("click", function(ev) {
                if (!Browser.pointerLock && Module['canvas'].requestPointerLock) {
                  Module['canvas'].requestPointerLock();
                  ev.preventDefault();
                }
              }, false);
            }
          }
        },createContext:function(canvas, useWebGL, setInModule, webGLContextAttributes) {
          if (useWebGL && Module.ctx && canvas == Module.canvas) return Module.ctx; // no need to recreate GL context if it's already been created for this canvas.
    
          var ctx;
          var contextHandle;
          if (useWebGL) {
            // For GLES2/desktop GL compatibility, adjust a few defaults to be different to WebGL defaults, so that they align better with the desktop defaults.
            var contextAttributes = {
              antialias: false,
              alpha: false,
              majorVersion: 1,
            };
    
            if (webGLContextAttributes) {
              for (var attribute in webGLContextAttributes) {
                contextAttributes[attribute] = webGLContextAttributes[attribute];
              }
            }
    
            // This check of existence of GL is here to satisfy Closure compiler, which yells if variable GL is referenced below but GL object is not
            // actually compiled in because application is not doing any GL operations. TODO: Ideally if GL is not being used, this function
            // Browser.createContext() should not even be emitted.
            if (typeof GL !== 'undefined') {
              contextHandle = GL.createContext(canvas, contextAttributes);
              if (contextHandle) {
                ctx = GL.getContext(contextHandle).GLctx;
              }
            }
          } else {
            ctx = canvas.getContext('2d');
          }
    
          if (!ctx) return null;
    
          if (setInModule) {
            if (!useWebGL) assert(typeof GLctx === 'undefined', 'cannot set in module if GLctx is used, but we are a non-GL context that would replace it');
    
            Module.ctx = ctx;
            if (useWebGL) GL.makeContextCurrent(contextHandle);
            Module.useWebGL = useWebGL;
            Browser.moduleContextCreatedCallbacks.forEach(function(callback) { callback() });
            Browser.init();
          }
          return ctx;
        },destroyContext:function(canvas, useWebGL, setInModule) {},fullscreenHandlersInstalled:false,lockPointer:undefined,resizeCanvas:undefined,requestFullscreen:function(lockPointer, resizeCanvas) {
          Browser.lockPointer = lockPointer;
          Browser.resizeCanvas = resizeCanvas;
          if (typeof Browser.lockPointer === 'undefined') Browser.lockPointer = true;
          if (typeof Browser.resizeCanvas === 'undefined') Browser.resizeCanvas = false;
    
          var canvas = Module['canvas'];
          function fullscreenChange() {
            Browser.isFullscreen = false;
            var canvasContainer = canvas.parentNode;
            if ((document['fullscreenElement'] || document['mozFullScreenElement'] ||
                 document['msFullscreenElement'] || document['webkitFullscreenElement'] ||
                 document['webkitCurrentFullScreenElement']) === canvasContainer) {
              canvas.exitFullscreen = Browser.exitFullscreen;
              if (Browser.lockPointer) canvas.requestPointerLock();
              Browser.isFullscreen = true;
              if (Browser.resizeCanvas) {
                Browser.setFullscreenCanvasSize();
              } else {
                Browser.updateCanvasDimensions(canvas);
              }
            } else {
              // remove the full screen specific parent of the canvas again to restore the HTML structure from before going full screen
              canvasContainer.parentNode.insertBefore(canvas, canvasContainer);
              canvasContainer.parentNode.removeChild(canvasContainer);
    
              if (Browser.resizeCanvas) {
                Browser.setWindowedCanvasSize();
              } else {
                Browser.updateCanvasDimensions(canvas);
              }
            }
            if (Module['onFullScreen']) Module['onFullScreen'](Browser.isFullscreen);
            if (Module['onFullscreen']) Module['onFullscreen'](Browser.isFullscreen);
          }
    
          if (!Browser.fullscreenHandlersInstalled) {
            Browser.fullscreenHandlersInstalled = true;
            document.addEventListener('fullscreenchange', fullscreenChange, false);
            document.addEventListener('mozfullscreenchange', fullscreenChange, false);
            document.addEventListener('webkitfullscreenchange', fullscreenChange, false);
            document.addEventListener('MSFullscreenChange', fullscreenChange, false);
          }
    
          // create a new parent to ensure the canvas has no siblings. this allows browsers to optimize full screen performance when its parent is the full screen root
          var canvasContainer = document.createElement("div");
          canvas.parentNode.insertBefore(canvasContainer, canvas);
          canvasContainer.appendChild(canvas);
    
          // use parent of canvas as full screen root to allow aspect ratio correction (Firefox stretches the root to screen size)
          canvasContainer.requestFullscreen = canvasContainer['requestFullscreen'] ||
                                              canvasContainer['mozRequestFullScreen'] ||
                                              canvasContainer['msRequestFullscreen'] ||
                                             (canvasContainer['webkitRequestFullscreen'] ? function() { canvasContainer['webkitRequestFullscreen'](Element['ALLOW_KEYBOARD_INPUT']) } : null) ||
                                             (canvasContainer['webkitRequestFullScreen'] ? function() { canvasContainer['webkitRequestFullScreen'](Element['ALLOW_KEYBOARD_INPUT']) } : null);
    
          canvasContainer.requestFullscreen();
        },exitFullscreen:function() {
          // This is workaround for chrome. Trying to exit from fullscreen
          // not in fullscreen state will cause "TypeError: Document not active"
          // in chrome. See https://github.com/emscripten-core/emscripten/pull/8236
          if (!Browser.isFullscreen) {
            return false;
          }
    
          var CFS = document['exitFullscreen'] ||
                    document['cancelFullScreen'] ||
                    document['mozCancelFullScreen'] ||
                    document['msExitFullscreen'] ||
                    document['webkitCancelFullScreen'] ||
              (function() {});
          CFS.apply(document, []);
          return true;
        },nextRAF:0,fakeRequestAnimationFrame:function(func) {
          // try to keep 60fps between calls to here
          var now = Date.now();
          if (Browser.nextRAF === 0) {
            Browser.nextRAF = now + 1000/60;
          } else {
            while (now + 2 >= Browser.nextRAF) { // fudge a little, to avoid timer jitter causing us to do lots of delay:0
              Browser.nextRAF += 1000/60;
            }
          }
          var delay = Math.max(Browser.nextRAF - now, 0);
          setTimeout(func, delay);
        },requestAnimationFrame:function(func) {
          if (typeof requestAnimationFrame === 'function') {
            requestAnimationFrame(func);
            return;
          }
          var RAF = Browser.fakeRequestAnimationFrame;
          RAF(func);
        },safeCallback:function(func) {
          return function() {
            if (!ABORT) return func.apply(null, arguments);
          };
        },allowAsyncCallbacks:true,queuedAsyncCallbacks:[],pauseAsyncCallbacks:function() {
          Browser.allowAsyncCallbacks = false;
        },resumeAsyncCallbacks:function() { // marks future callbacks as ok to execute, and synchronously runs any remaining ones right now
          Browser.allowAsyncCallbacks = true;
          if (Browser.queuedAsyncCallbacks.length > 0) {
            var callbacks = Browser.queuedAsyncCallbacks;
            Browser.queuedAsyncCallbacks = [];
            callbacks.forEach(function(func) {
              func();
            });
          }
        },safeRequestAnimationFrame:function(func) {
          return Browser.requestAnimationFrame(function() {
            if (ABORT) return;
            if (Browser.allowAsyncCallbacks) {
              func();
            } else {
              Browser.queuedAsyncCallbacks.push(func);
            }
          });
        },safeSetTimeout:function(func, timeout) {
          noExitRuntime = true;
          return setTimeout(function() {
            if (ABORT) return;
            if (Browser.allowAsyncCallbacks) {
              func();
            } else {
              Browser.queuedAsyncCallbacks.push(func);
            }
          }, timeout);
        },safeSetInterval:function(func, timeout) {
          noExitRuntime = true;
          return setInterval(function() {
            if (ABORT) return;
            if (Browser.allowAsyncCallbacks) {
              func();
            } // drop it on the floor otherwise, next interval will kick in
          }, timeout);
        },getMimetype:function(name) {
          return {
            'jpg': 'image/jpeg',
            'jpeg': 'image/jpeg',
            'png': 'image/png',
            'bmp': 'image/bmp',
            'ogg': 'audio/ogg',
            'wav': 'audio/wav',
            'mp3': 'audio/mpeg'
          }[name.substr(name.lastIndexOf('.')+1)];
        },getUserMedia:function(func) {
          if(!window.getUserMedia) {
            window.getUserMedia = navigator['getUserMedia'] ||
                                  navigator['mozGetUserMedia'];
          }
          window.getUserMedia(func);
        },getMovementX:function(event) {
          return event['movementX'] ||
                 event['mozMovementX'] ||
                 event['webkitMovementX'] ||
                 0;
        },getMovementY:function(event) {
          return event['movementY'] ||
                 event['mozMovementY'] ||
                 event['webkitMovementY'] ||
                 0;
        },getMouseWheelDelta:function(event) {
          var delta = 0;
          switch (event.type) {
            case 'DOMMouseScroll':
              // 3 lines make up a step
              delta = event.detail / 3;
              break;
            case 'mousewheel':
              // 120 units make up a step
              delta = event.wheelDelta / 120;
              break;
            case 'wheel':
              delta = event.deltaY
              switch(event.deltaMode) {
                case 0:
                  // DOM_DELTA_PIXEL: 100 pixels make up a step
                  delta /= 100;
                  break;
                case 1:
                  // DOM_DELTA_LINE: 3 lines make up a step
                  delta /= 3;
                  break;
                case 2:
                  // DOM_DELTA_PAGE: A page makes up 80 steps
                  delta *= 80;
                  break;
                default:
                  throw 'unrecognized mouse wheel delta mode: ' + event.deltaMode;
              }
              break;
            default:
              throw 'unrecognized mouse wheel event: ' + event.type;
          }
          return delta;
        },mouseX:0,mouseY:0,mouseMovementX:0,mouseMovementY:0,touches:{},lastTouches:{},calculateMouseEvent:function(event) { // event should be mousemove, mousedown or mouseup
          if (Browser.pointerLock) {
            // When the pointer is locked, calculate the coordinates
            // based on the movement of the mouse.
            // Workaround for Firefox bug 764498
            if (event.type != 'mousemove' &&
                ('mozMovementX' in event)) {
              Browser.mouseMovementX = Browser.mouseMovementY = 0;
            } else {
              Browser.mouseMovementX = Browser.getMovementX(event);
              Browser.mouseMovementY = Browser.getMovementY(event);
            }
    
            // check if SDL is available
            if (typeof SDL != "undefined") {
              Browser.mouseX = SDL.mouseX + Browser.mouseMovementX;
              Browser.mouseY = SDL.mouseY + Browser.mouseMovementY;
            } else {
              // just add the mouse delta to the current absolut mouse position
              // FIXME: ideally this should be clamped against the canvas size and zero
              Browser.mouseX += Browser.mouseMovementX;
              Browser.mouseY += Browser.mouseMovementY;
            }
          } else {
            // Otherwise, calculate the movement based on the changes
            // in the coordinates.
            var rect = Module["canvas"].getBoundingClientRect();
            var cw = Module["canvas"].width;
            var ch = Module["canvas"].height;
    
            // Neither .scrollX or .pageXOffset are defined in a spec, but
            // we prefer .scrollX because it is currently in a spec draft.
            // (see: http://www.w3.org/TR/2013/WD-cssom-view-20131217/)
            var scrollX = ((typeof window.scrollX !== 'undefined') ? window.scrollX : window.pageXOffset);
            var scrollY = ((typeof window.scrollY !== 'undefined') ? window.scrollY : window.pageYOffset);
    
            if (event.type === 'touchstart' || event.type === 'touchend' || event.type === 'touchmove') {
              var touch = event.touch;
              if (touch === undefined) {
                return; // the "touch" property is only defined in SDL
    
              }
              var adjustedX = touch.pageX - (scrollX + rect.left);
              var adjustedY = touch.pageY - (scrollY + rect.top);
    
              adjustedX = adjustedX * (cw / rect.width);
              adjustedY = adjustedY * (ch / rect.height);
    
              var coords = { x: adjustedX, y: adjustedY };
    
              if (event.type === 'touchstart') {
                Browser.lastTouches[touch.identifier] = coords;
                Browser.touches[touch.identifier] = coords;
              } else if (event.type === 'touchend' || event.type === 'touchmove') {
                var last = Browser.touches[touch.identifier];
                if (!last) last = coords;
                Browser.lastTouches[touch.identifier] = last;
                Browser.touches[touch.identifier] = coords;
              }
              return;
            }
    
            var x = event.pageX - (scrollX + rect.left);
            var y = event.pageY - (scrollY + rect.top);
    
            // the canvas might be CSS-scaled compared to its backbuffer;
            // SDL-using content will want mouse coordinates in terms
            // of backbuffer units.
            x = x * (cw / rect.width);
            y = y * (ch / rect.height);
    
            Browser.mouseMovementX = x - Browser.mouseX;
            Browser.mouseMovementY = y - Browser.mouseY;
            Browser.mouseX = x;
            Browser.mouseY = y;
          }
        },asyncLoad:function(url, onload, onerror, noRunDep) {
          var dep = !noRunDep ? getUniqueRunDependency('al ' + url) : '';
          readAsync(url, function(arrayBuffer) {
            assert(arrayBuffer, 'Loading data file "' + url + '" failed (no arrayBuffer).');
            onload(new Uint8Array(arrayBuffer));
            if (dep) removeRunDependency(dep);
          }, function(event) {
            if (onerror) {
              onerror();
            } else {
              throw 'Loading data file "' + url + '" failed.';
            }
          });
          if (dep) addRunDependency(dep);
        },resizeListeners:[],updateResizeListeners:function() {
          var canvas = Module['canvas'];
          Browser.resizeListeners.forEach(function(listener) {
            listener(canvas.width, canvas.height);
          });
        },setCanvasSize:function(width, height, noUpdates) {
          var canvas = Module['canvas'];
          Browser.updateCanvasDimensions(canvas, width, height);
          if (!noUpdates) Browser.updateResizeListeners();
        },windowedWidth:0,windowedHeight:0,setFullscreenCanvasSize:function() {
          // check if SDL is available
          if (typeof SDL != "undefined") {
            var flags = HEAPU32[((SDL.screen)>>2)];
            flags = flags | 0x00800000; // set SDL_FULLSCREEN flag
            HEAP32[((SDL.screen)>>2)]=flags
          }
          Browser.updateCanvasDimensions(Module['canvas']);
          Browser.updateResizeListeners();
        },setWindowedCanvasSize:function() {
          // check if SDL is available
          if (typeof SDL != "undefined") {
            var flags = HEAPU32[((SDL.screen)>>2)];
            flags = flags & ~0x00800000; // clear SDL_FULLSCREEN flag
            HEAP32[((SDL.screen)>>2)]=flags
          }
          Browser.updateCanvasDimensions(Module['canvas']);
          Browser.updateResizeListeners();
        },updateCanvasDimensions:function(canvas, wNative, hNative) {
          if (wNative && hNative) {
            canvas.widthNative = wNative;
            canvas.heightNative = hNative;
          } else {
            wNative = canvas.widthNative;
            hNative = canvas.heightNative;
          }
          var w = wNative;
          var h = hNative;
          if (Module['forcedAspectRatio'] && Module['forcedAspectRatio'] > 0) {
            if (w/h < Module['forcedAspectRatio']) {
              w = Math.round(h * Module['forcedAspectRatio']);
            } else {
              h = Math.round(w / Module['forcedAspectRatio']);
            }
          }
          if (((document['fullscreenElement'] || document['mozFullScreenElement'] ||
               document['msFullscreenElement'] || document['webkitFullscreenElement'] ||
               document['webkitCurrentFullScreenElement']) === canvas.parentNode) && (typeof screen != 'undefined')) {
             var factor = Math.min(screen.width / w, screen.height / h);
             w = Math.round(w * factor);
             h = Math.round(h * factor);
          }
          if (Browser.resizeCanvas) {
            if (canvas.width  != w) canvas.width  = w;
            if (canvas.height != h) canvas.height = h;
            if (typeof canvas.style != 'undefined') {
              canvas.style.removeProperty( "width");
              canvas.style.removeProperty("height");
            }
          } else {
            if (canvas.width  != wNative) canvas.width  = wNative;
            if (canvas.height != hNative) canvas.height = hNative;
            if (typeof canvas.style != 'undefined') {
              if (w != wNative || h != hNative) {
                canvas.style.setProperty( "width", w + "px", "important");
                canvas.style.setProperty("height", h + "px", "important");
              } else {
                canvas.style.removeProperty( "width");
                canvas.style.removeProperty("height");
              }
            }
          }
        },wgetRequests:{},nextWgetRequestHandle:0,getNextWgetRequestHandle:function() {
          var handle = Browser.nextWgetRequestHandle;
          Browser.nextWgetRequestHandle++;
          return handle;
        }};var EGL={errorCode:12288,defaultDisplayInitialized:false,currentContext:0,currentReadSurface:0,currentDrawSurface:0,contextAttributes:{alpha:false,depth:false,stencil:false,antialias:false},stringCache:{},setErrorCode:function(code) {
          EGL.errorCode = code;
        },chooseConfig:function(display, attribList, config, config_size, numConfigs) {
          if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
            EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
            return 0;
          }
    
          if (attribList) {
            // read attribList if it is non-null
            for(;;) {
              var param = HEAP32[((attribList)>>2)];
              if (param == 0x3021 /*EGL_ALPHA_SIZE*/) {
                var alphaSize = HEAP32[(((attribList)+(4))>>2)];
                EGL.contextAttributes.alpha = (alphaSize > 0);
              } else if (param == 0x3025 /*EGL_DEPTH_SIZE*/) {
                var depthSize = HEAP32[(((attribList)+(4))>>2)];
                EGL.contextAttributes.depth = (depthSize > 0);
              } else if (param == 0x3026 /*EGL_STENCIL_SIZE*/) {
                var stencilSize = HEAP32[(((attribList)+(4))>>2)];
                EGL.contextAttributes.stencil = (stencilSize > 0);
              } else if (param == 0x3031 /*EGL_SAMPLES*/) {
                var samples = HEAP32[(((attribList)+(4))>>2)];
                EGL.contextAttributes.antialias = (samples > 0);
              } else if (param == 0x3032 /*EGL_SAMPLE_BUFFERS*/) {
                var samples = HEAP32[(((attribList)+(4))>>2)];
                EGL.contextAttributes.antialias = (samples == 1);
              } else if (param == 0x3100 /*EGL_CONTEXT_PRIORITY_LEVEL_IMG*/) {
                var requestedPriority = HEAP32[(((attribList)+(4))>>2)];
                EGL.contextAttributes.lowLatency = (requestedPriority != 0x3103 /*EGL_CONTEXT_PRIORITY_LOW_IMG*/);
              } else if (param == 0x3038 /*EGL_NONE*/) {
                  break;
              }
              attribList += 8;
            }
          }
    
          if ((!config || !config_size) && !numConfigs) {
            EGL.setErrorCode(0x300C /* EGL_BAD_PARAMETER */);
            return 0;
          }
          if (numConfigs) {
            HEAP32[((numConfigs)>>2)]=1; // Total number of supported configs: 1.
          }
          if (config && config_size > 0) {
            HEAP32[((config)>>2)]=62002;
          }
    
          EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
          return 1;
        }};function _eglBindAPI(api) {
        if (api == 0x30A0 /* EGL_OPENGL_ES_API */) {
          EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
          return 1;
        } else { // if (api == 0x30A1 /* EGL_OPENVG_API */ || api == 0x30A2 /* EGL_OPENGL_API */) {
          EGL.setErrorCode(0x300C /* EGL_BAD_PARAMETER */);
          return 0;
        }
      }
  
    function _eglChooseConfig(display, attrib_list, configs, config_size, numConfigs) {
        return EGL.chooseConfig(display, attrib_list, configs, config_size, numConfigs);
      }
  
    
    
    function __webgl_enable_ANGLE_instanced_arrays(ctx) {
        // Extension available in WebGL 1 from Firefox 26 and Google Chrome 30 onwards. Core feature in WebGL 2.
        var ext = ctx.getExtension('ANGLE_instanced_arrays');
        if (ext) {
          ctx['vertexAttribDivisor'] = function(index, divisor) { ext['vertexAttribDivisorANGLE'](index, divisor); };
          ctx['drawArraysInstanced'] = function(mode, first, count, primcount) { ext['drawArraysInstancedANGLE'](mode, first, count, primcount); };
          ctx['drawElementsInstanced'] = function(mode, count, type, indices, primcount) { ext['drawElementsInstancedANGLE'](mode, count, type, indices, primcount); };
          return 1;
        }
      }
    
    function __webgl_enable_OES_vertex_array_object(ctx) {
        // Extension available in WebGL 1 from Firefox 25 and WebKit 536.28/desktop Safari 6.0.3 onwards. Core feature in WebGL 2.
        var ext = ctx.getExtension('OES_vertex_array_object');
        if (ext) {
          ctx['createVertexArray'] = function() { return ext['createVertexArrayOES'](); };
          ctx['deleteVertexArray'] = function(vao) { ext['deleteVertexArrayOES'](vao); };
          ctx['bindVertexArray'] = function(vao) { ext['bindVertexArrayOES'](vao); };
          ctx['isVertexArray'] = function(vao) { return ext['isVertexArrayOES'](vao); };
          return 1;
        }
      }
    
    function __webgl_enable_WEBGL_draw_buffers(ctx) {
        // Extension available in WebGL 1 from Firefox 28 onwards. Core feature in WebGL 2.
        var ext = ctx.getExtension('WEBGL_draw_buffers');
        if (ext) {
          ctx['drawBuffers'] = function(n, bufs) { ext['drawBuffersWEBGL'](n, bufs); };
          return 1;
        }
      }
    
    function __webgl_enable_WEBGL_multi_draw(ctx) {
        // Closure is expected to be allowed to minify the '.multiDrawWebgl' property, so not accessing it quoted.
        return !!(ctx.multiDrawWebgl = ctx.getExtension('WEBGL_multi_draw'));
      }var GL={counter:1,buffers:[],programs:[],framebuffers:[],renderbuffers:[],textures:[],uniforms:[],shaders:[],vaos:[],contexts:[],offscreenCanvases:{},timerQueriesEXT:[],programInfos:{},stringCache:{},unpackAlignment:4,recordError:function recordError(errorCode) {
          if (!GL.lastError) {
            GL.lastError = errorCode;
          }
        },getNewId:function(table) {
          var ret = GL.counter++;
          for (var i = table.length; i < ret; i++) {
            table[i] = null;
          }
          return ret;
        },getSource:function(shader, count, string, length) {
          var source = '';
          for (var i = 0; i < count; ++i) {
            var len = length ? HEAP32[(((length)+(i*4))>>2)] : -1;
            source += UTF8ToString(HEAP32[(((string)+(i*4))>>2)], len < 0 ? undefined : len);
          }
          return source;
        },createContext:function(canvas, webGLContextAttributes) {
    
    
    
    
    
          var ctx = 
            (canvas.getContext("webgl", webGLContextAttributes)
              // https://caniuse.com/#feat=webgl
              );
    
    
          if (!ctx) return 0;
    
          var handle = GL.registerContext(ctx, webGLContextAttributes);
    
    
    
          return handle;
        },registerContext:function(ctx, webGLContextAttributes) {
          // without pthreads a context is just an integer ID
          var handle = GL.getNewId(GL.contexts);
    
          var context = {
            handle: handle,
            attributes: webGLContextAttributes,
            version: webGLContextAttributes.majorVersion,
            GLctx: ctx
          };
    
    
          // Store the created context object so that we can access the context given a canvas without having to pass the parameters again.
          if (ctx.canvas) ctx.canvas.GLctxObject = context;
          GL.contexts[handle] = context;
          if (typeof webGLContextAttributes.enableExtensionsByDefault === 'undefined' || webGLContextAttributes.enableExtensionsByDefault) {
            GL.initExtensions(context);
          }
    
    
    
    
          return handle;
        },makeContextCurrent:function(contextHandle) {
    
          GL.currentContext = GL.contexts[contextHandle]; // Active Emscripten GL layer context object.
          Module.ctx = GLctx = GL.currentContext && GL.currentContext.GLctx; // Active WebGL context object.
          return !(contextHandle && !GLctx);
        },getContext:function(contextHandle) {
          return GL.contexts[contextHandle];
        },deleteContext:function(contextHandle) {
          if (GL.currentContext === GL.contexts[contextHandle]) GL.currentContext = null;
          if (typeof JSEvents === 'object') JSEvents.removeAllHandlersOnTarget(GL.contexts[contextHandle].GLctx.canvas); // Release all JS event handlers on the DOM element that the GL context is associated with since the context is now deleted.
          if (GL.contexts[contextHandle] && GL.contexts[contextHandle].GLctx.canvas) GL.contexts[contextHandle].GLctx.canvas.GLctxObject = undefined; // Make sure the canvas object no longer refers to the context object so there are no GC surprises.
          GL.contexts[contextHandle] = null;
        },initExtensions:function(context) {
          // If this function is called without a specific context object, init the extensions of the currently active context.
          if (!context) context = GL.currentContext;
    
          if (context.initExtensionsDone) return;
          context.initExtensionsDone = true;
    
          var GLctx = context.GLctx;
    
          // Detect the presence of a few extensions manually, this GL interop layer itself will need to know if they exist.
    
          // Extensions that are only available in WebGL 1 (the calls will be no-ops if called on a WebGL 2 context active)
          __webgl_enable_ANGLE_instanced_arrays(GLctx);
          __webgl_enable_OES_vertex_array_object(GLctx);
          __webgl_enable_WEBGL_draw_buffers(GLctx);
    
          GLctx.disjointTimerQueryExt = GLctx.getExtension("EXT_disjoint_timer_query");
          __webgl_enable_WEBGL_multi_draw(GLctx);
    
          // These are the 'safe' feature-enabling extensions that don't add any performance impact related to e.g. debugging, and
          // should be enabled by default so that client GLES2/GL code will not need to go through extra hoops to get its stuff working.
          // As new extensions are ratified at http://www.khronos.org/registry/webgl/extensions/ , feel free to add your new extensions
          // here, as long as they don't produce a performance impact for users that might not be using those extensions.
          // E.g. debugging-related extensions should probably be off by default.
          var automaticallyEnabledExtensions = [ // Khronos ratified WebGL extensions ordered by number (no debug extensions):
                                                 "OES_texture_float", "OES_texture_half_float", "OES_standard_derivatives",
                                                 "OES_vertex_array_object", "WEBGL_compressed_texture_s3tc", "WEBGL_depth_texture",
                                                 "OES_element_index_uint", "EXT_texture_filter_anisotropic", "EXT_frag_depth",
                                                 "WEBGL_draw_buffers", "ANGLE_instanced_arrays", "OES_texture_float_linear",
                                                 "OES_texture_half_float_linear", "EXT_blend_minmax", "EXT_shader_texture_lod",
                                                 "EXT_texture_norm16",
                                                 // Community approved WebGL extensions ordered by number:
                                                 "WEBGL_compressed_texture_pvrtc", "EXT_color_buffer_half_float", "WEBGL_color_buffer_float",
                                                 "EXT_sRGB", "WEBGL_compressed_texture_etc1", "EXT_disjoint_timer_query",
                                                 "WEBGL_compressed_texture_etc", "WEBGL_compressed_texture_astc", "EXT_color_buffer_float",
                                                 "WEBGL_compressed_texture_s3tc_srgb", "EXT_disjoint_timer_query_webgl2",
                                                 // Old style prefixed forms of extensions (but still currently used on e.g. iPhone Xs as
                                                 // tested on iOS 12.4.1):
                                                 "WEBKIT_WEBGL_compressed_texture_pvrtc"];
    
          function shouldEnableAutomatically(extension) {
            var ret = false;
            automaticallyEnabledExtensions.forEach(function(include) {
              if (extension.indexOf(include) != -1) {
                ret = true;
              }
            });
            return ret;
          }
    
          var exts = GLctx.getSupportedExtensions() || []; // .getSupportedExtensions() can return null if context is lost, so coerce to empty array.
          exts.forEach(function(ext) {
            if (automaticallyEnabledExtensions.indexOf(ext) != -1) {
              GLctx.getExtension(ext); // Calling .getExtension enables that extension permanently, no need to store the return value to be enabled.
            }
          });
        },populateUniformTable:function(program) {
          var p = GL.programs[program];
          var ptable = GL.programInfos[program] = {
            uniforms: {},
            maxUniformLength: 0, // This is eagerly computed below, since we already enumerate all uniforms anyway.
            maxAttributeLength: -1, // This is lazily computed and cached, computed when/if first asked, "-1" meaning not computed yet.
            maxUniformBlockNameLength: -1 // Lazily computed as well
          };
    
          var utable = ptable.uniforms;
          // A program's uniform table maps the string name of an uniform to an integer location of that uniform.
          // The global GL.uniforms map maps integer locations to WebGLUniformLocations.
          var numUniforms = GLctx.getProgramParameter(p, 0x8B86/*GL_ACTIVE_UNIFORMS*/);
          for (var i = 0; i < numUniforms; ++i) {
            var u = GLctx.getActiveUniform(p, i);
    
            var name = u.name;
            ptable.maxUniformLength = Math.max(ptable.maxUniformLength, name.length+1);
    
            // If we are dealing with an array, e.g. vec4 foo[3], strip off the array index part to canonicalize that "foo", "foo[]",
            // and "foo[0]" will mean the same. Loop below will populate foo[1] and foo[2].
            if (name.slice(-1) == ']') {
              name = name.slice(0, name.lastIndexOf('['));
            }
    
            // Optimize memory usage slightly: If we have an array of uniforms, e.g. 'vec3 colors[3];', then
            // only store the string 'colors' in utable, and 'colors[0]', 'colors[1]' and 'colors[2]' will be parsed as 'colors'+i.
            // Note that for the GL.uniforms table, we still need to fetch the all WebGLUniformLocations for all the indices.
            var loc = GLctx.getUniformLocation(p, name);
            if (loc) {
              var id = GL.getNewId(GL.uniforms);
              utable[name] = [u.size, id];
              GL.uniforms[id] = loc;
    
              for (var j = 1; j < u.size; ++j) {
                var n = name + '['+j+']';
                loc = GLctx.getUniformLocation(p, n);
                id = GL.getNewId(GL.uniforms);
    
                GL.uniforms[id] = loc;
              }
            }
          }
        }};function _eglCreateContext(display, config, hmm, contextAttribs) {
        if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
          EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
          return 0;
        }
    
        // EGL 1.4 spec says default EGL_CONTEXT_CLIENT_VERSION is GLES1, but this is not supported by Emscripten.
        // So user must pass EGL_CONTEXT_CLIENT_VERSION == 2 to initialize EGL.
        var glesContextVersion = 1;
        for(;;) {
          var param = HEAP32[((contextAttribs)>>2)];
          if (param == 0x3098 /*EGL_CONTEXT_CLIENT_VERSION*/) {
            glesContextVersion = HEAP32[(((contextAttribs)+(4))>>2)];
          } else if (param == 0x3038 /*EGL_NONE*/) {
            break;
          } else {
            /* EGL1.4 specifies only EGL_CONTEXT_CLIENT_VERSION as supported attribute */
            EGL.setErrorCode(0x3004 /*EGL_BAD_ATTRIBUTE*/);
            return 0;
          }
          contextAttribs += 8;
        }
        if (glesContextVersion != 2) {
          EGL.setErrorCode(0x3005 /* EGL_BAD_CONFIG */);
          return 0; /* EGL_NO_CONTEXT */
        }
    
        EGL.contextAttributes.majorVersion = glesContextVersion - 1; // WebGL 1 is GLES 2, WebGL2 is GLES3
        EGL.contextAttributes.minorVersion = 0;
    
        EGL.context = GL.createContext(Module['canvas'], EGL.contextAttributes);
    
        if (EGL.context != 0) {
          EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
    
          // Run callbacks so that GL emulation works
          GL.makeContextCurrent(EGL.context);
          Module.useWebGL = true;
          Browser.moduleContextCreatedCallbacks.forEach(function(callback) { callback() });
    
          // Note: This function only creates a context, but it shall not make it active.
          GL.makeContextCurrent(null);
          return 62004; // Magic ID for Emscripten EGLContext
        } else {
          EGL.setErrorCode(0x3009 /* EGL_BAD_MATCH */); // By the EGL 1.4 spec, an implementation that does not support GLES2 (WebGL in this case), this error code is set.
          return 0; /* EGL_NO_CONTEXT */
        }
      }
  
    function _eglCreateWindowSurface(display, config, win, attrib_list) {
        if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
          EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
          return 0;
        }
        if (config != 62002 /* Magic ID for the only EGLConfig supported by Emscripten */) {
          EGL.setErrorCode(0x3005 /* EGL_BAD_CONFIG */);
          return 0;
        }
        // TODO: Examine attrib_list! Parameters that can be present there are:
        // - EGL_RENDER_BUFFER (must be EGL_BACK_BUFFER)
        // - EGL_VG_COLORSPACE (can't be set)
        // - EGL_VG_ALPHA_FORMAT (can't be set)
        EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
        return 62006; /* Magic ID for Emscripten 'default surface' */
      }
  
    function _eglDestroyContext(display, context) {
        if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
          EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
          return 0;
        }
        if (context != 62004 /* Magic ID for Emscripten EGLContext */) {
          EGL.setErrorCode(0x3006 /* EGL_BAD_CONTEXT */);
          return 0;
        }
    
        GL.deleteContext(EGL.context);
        EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
        if (EGL.currentContext == context) {
          EGL.currentContext = 0;
        }
        return 1 /* EGL_TRUE */;
      }
  
    function _eglDestroySurface(display, surface) {
        if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
          EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
          return 0;
        }
        if (surface != 62006 /* Magic ID for the only EGLSurface supported by Emscripten */) {
          EGL.setErrorCode(0x300D /* EGL_BAD_SURFACE */);
          return 1;
        }
        if (EGL.currentReadSurface == surface) {
          EGL.currentReadSurface = 0;
        }
        if (EGL.currentDrawSurface == surface) {
          EGL.currentDrawSurface = 0;
        }
        EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
        return 1; /* Magic ID for Emscripten 'default surface' */
      }
  
    function _eglGetConfigAttrib(display, config, attribute, value) {
        if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
          EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
          return 0;
        }
        if (config != 62002 /* Magic ID for the only EGLConfig supported by Emscripten */) {
          EGL.setErrorCode(0x3005 /* EGL_BAD_CONFIG */);
          return 0;
        }
        if (!value) {
          EGL.setErrorCode(0x300C /* EGL_BAD_PARAMETER */);
          return 0;
        }
        EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
        switch(attribute) {
        case 0x3020: // EGL_BUFFER_SIZE
          HEAP32[((value)>>2)]=EGL.contextAttributes.alpha ? 32 : 24;
          return 1;
        case 0x3021: // EGL_ALPHA_SIZE
          HEAP32[((value)>>2)]=EGL.contextAttributes.alpha ? 8 : 0;
          return 1;
        case 0x3022: // EGL_BLUE_SIZE
          HEAP32[((value)>>2)]=8;
          return 1;
        case 0x3023: // EGL_GREEN_SIZE
          HEAP32[((value)>>2)]=8;
          return 1;
        case 0x3024: // EGL_RED_SIZE
          HEAP32[((value)>>2)]=8;
          return 1;
        case 0x3025: // EGL_DEPTH_SIZE
          HEAP32[((value)>>2)]=EGL.contextAttributes.depth ? 24 : 0;
          return 1;
        case 0x3026: // EGL_STENCIL_SIZE
          HEAP32[((value)>>2)]=EGL.contextAttributes.stencil ? 8 : 0;
          return 1;
        case 0x3027: // EGL_CONFIG_CAVEAT
          // We can return here one of EGL_NONE (0x3038), EGL_SLOW_CONFIG (0x3050) or EGL_NON_CONFORMANT_CONFIG (0x3051).
          HEAP32[((value)>>2)]=0x3038;
          return 1;
        case 0x3028: // EGL_CONFIG_ID
          HEAP32[((value)>>2)]=62002;
          return 1;
        case 0x3029: // EGL_LEVEL
          HEAP32[((value)>>2)]=0;
          return 1;
        case 0x302A: // EGL_MAX_PBUFFER_HEIGHT
          HEAP32[((value)>>2)]=4096;
          return 1;
        case 0x302B: // EGL_MAX_PBUFFER_PIXELS
          HEAP32[((value)>>2)]=16777216;
          return 1;
        case 0x302C: // EGL_MAX_PBUFFER_WIDTH
          HEAP32[((value)>>2)]=4096;
          return 1;
        case 0x302D: // EGL_NATIVE_RENDERABLE
          HEAP32[((value)>>2)]=0;
          return 1;
        case 0x302E: // EGL_NATIVE_VISUAL_ID
          HEAP32[((value)>>2)]=0;
          return 1;
        case 0x302F: // EGL_NATIVE_VISUAL_TYPE
          HEAP32[((value)>>2)]=0x3038;
          return 1;
        case 0x3031: // EGL_SAMPLES
          HEAP32[((value)>>2)]=EGL.contextAttributes.antialias ? 4 : 0;
          return 1;
        case 0x3032: // EGL_SAMPLE_BUFFERS
          HEAP32[((value)>>2)]=EGL.contextAttributes.antialias ? 1 : 0;
          return 1;
        case 0x3033: // EGL_SURFACE_TYPE
          HEAP32[((value)>>2)]=0x4;
          return 1;
        case 0x3034: // EGL_TRANSPARENT_TYPE
          // If this returns EGL_TRANSPARENT_RGB (0x3052), transparency is used through color-keying. No such thing applies to Emscripten canvas.
          HEAP32[((value)>>2)]=0x3038;
          return 1;
        case 0x3035: // EGL_TRANSPARENT_BLUE_VALUE
        case 0x3036: // EGL_TRANSPARENT_GREEN_VALUE
        case 0x3037: // EGL_TRANSPARENT_RED_VALUE
          // "If EGL_TRANSPARENT_TYPE is EGL_NONE, then the values for EGL_TRANSPARENT_RED_VALUE, EGL_TRANSPARENT_GREEN_VALUE, and EGL_TRANSPARENT_BLUE_VALUE are undefined."
          HEAP32[((value)>>2)]=-1;
          return 1;
        case 0x3039: // EGL_BIND_TO_TEXTURE_RGB
        case 0x303A: // EGL_BIND_TO_TEXTURE_RGBA
          HEAP32[((value)>>2)]=0;
          return 1;
        case 0x303B: // EGL_MIN_SWAP_INTERVAL
          HEAP32[((value)>>2)]=0;
          return 1;
        case 0x303C: // EGL_MAX_SWAP_INTERVAL
          HEAP32[((value)>>2)]=1;
          return 1;
        case 0x303D: // EGL_LUMINANCE_SIZE
        case 0x303E: // EGL_ALPHA_MASK_SIZE
          HEAP32[((value)>>2)]=0;
          return 1;
        case 0x303F: // EGL_COLOR_BUFFER_TYPE
          // EGL has two types of buffers: EGL_RGB_BUFFER and EGL_LUMINANCE_BUFFER.
          HEAP32[((value)>>2)]=0x308E;
          return 1;
        case 0x3040: // EGL_RENDERABLE_TYPE
          // A bit combination of EGL_OPENGL_ES_BIT,EGL_OPENVG_BIT,EGL_OPENGL_ES2_BIT and EGL_OPENGL_BIT.
          HEAP32[((value)>>2)]=0x4;
          return 1;
        case 0x3042: // EGL_CONFORMANT
          // "EGL_CONFORMANT is a mask indicating if a client API context created with respect to the corresponding EGLConfig will pass the required conformance tests for that API."
          HEAP32[((value)>>2)]=0;
          return 1;
        default:
          EGL.setErrorCode(0x3004 /* EGL_BAD_ATTRIBUTE */);
          return 0;
        }
      }
  
    function _eglGetDisplay(nativeDisplayType) {
        EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
        // Note: As a 'conformant' implementation of EGL, we would prefer to init here only if the user
        //       calls this function with EGL_DEFAULT_DISPLAY. Other display IDs would be preferred to be unsupported
        //       and EGL_NO_DISPLAY returned. Uncomment the following code lines to do this.
        // Instead, an alternative route has been preferred, namely that the Emscripten EGL implementation
        // "emulates" X11, and eglGetDisplay is expected to accept/receive a pointer to an X11 Display object.
        // Therefore, be lax and allow anything to be passed in, and return the magic handle to our default EGLDisplay object.
    
    //    if (nativeDisplayType == 0 /* EGL_DEFAULT_DISPLAY */) {
            return 62000; // Magic ID for Emscripten 'default display'
    //    }
    //    else
    //      return 0; // EGL_NO_DISPLAY
      }
  
    function _eglGetError() {
        return EGL.errorCode;
      }
  
    function _eglGetProcAddress(name_) {
        return _emscripten_GetProcAddress(name_);
      }
  
    function _eglInitialize(display, majorVersion, minorVersion) {
        if (display == 62000 /* Magic ID for Emscripten 'default display' */) {
          if (majorVersion) {
            HEAP32[((majorVersion)>>2)]=1; // Advertise EGL Major version: '1'
          }
          if (minorVersion) {
            HEAP32[((minorVersion)>>2)]=4; // Advertise EGL Minor version: '4'
          }
          EGL.defaultDisplayInitialized = true;
          EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
          return 1;
        }
        else {
          EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
          return 0;
        }
      }
  
    function _eglMakeCurrent(display, draw, read, context) {
        if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
          EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
          return 0 /* EGL_FALSE */;
        }
        //\todo An EGL_NOT_INITIALIZED error is generated if EGL is not initialized for dpy.
        if (context != 0 && context != 62004 /* Magic ID for Emscripten EGLContext */) {
          EGL.setErrorCode(0x3006 /* EGL_BAD_CONTEXT */);
          return 0;
        }
        if ((read != 0 && read != 62006) || (draw != 0 && draw != 62006 /* Magic ID for Emscripten 'default surface' */)) {
          EGL.setErrorCode(0x300D /* EGL_BAD_SURFACE */);
          return 0;
        }
    
        GL.makeContextCurrent(context ? EGL.context : null);
    
        EGL.currentContext = context;
        EGL.currentDrawSurface = draw;
        EGL.currentReadSurface = read;
        EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
        return 1 /* EGL_TRUE */;
      }
  
    function _eglQueryString(display, name) {
        if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
          EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
          return 0;
        }
        //\todo An EGL_NOT_INITIALIZED error is generated if EGL is not initialized for dpy.
        EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
        if (EGL.stringCache[name]) return EGL.stringCache[name];
        var ret;
        switch(name) {
          case 0x3053 /* EGL_VENDOR */: ret = allocateUTF8("Emscripten"); break;
          case 0x3054 /* EGL_VERSION */: ret = allocateUTF8("1.4 Emscripten EGL"); break;
          case 0x3055 /* EGL_EXTENSIONS */:  ret = allocateUTF8(""); break; // Currently not supporting any EGL extensions.
          case 0x308D /* EGL_CLIENT_APIS */: ret = allocateUTF8("OpenGL_ES"); break;
          default:
            EGL.setErrorCode(0x300C /* EGL_BAD_PARAMETER */);
            return 0;
        }
        EGL.stringCache[name] = ret;
        return ret;
      }
  
    function _eglSwapBuffers() {
    
        if (!EGL.defaultDisplayInitialized) {
          EGL.setErrorCode(0x3001 /* EGL_NOT_INITIALIZED */);
        } else if (!Module.ctx) {
          EGL.setErrorCode(0x3002 /* EGL_BAD_ACCESS */);
        } else if (Module.ctx.isContextLost()) {
          EGL.setErrorCode(0x300E /* EGL_CONTEXT_LOST */);
        } else {
          // According to documentation this does an implicit flush.
          // Due to discussion at https://github.com/emscripten-core/emscripten/pull/1871
          // the flush was removed since this _may_ result in slowing code down.
          //_glFlush();
          EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
          return 1 /* EGL_TRUE */;
        }
        return 0 /* EGL_FALSE */;
      }
  
    function _eglSwapInterval(display, interval) {
        if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
          EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
          return 0;
        }
        if (interval == 0) _emscripten_set_main_loop_timing(0/*EM_TIMING_SETTIMEOUT*/, 0);
        else _emscripten_set_main_loop_timing(1/*EM_TIMING_RAF*/, interval);
    
        EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
        return 1;
      }
  
    function _eglTerminate(display) {
        if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
          EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
          return 0;
        }
        EGL.currentContext = 0;
        EGL.currentReadSurface = 0;
        EGL.currentDrawSurface = 0;
        EGL.defaultDisplayInitialized = false;
        EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
        return 1;
      }
  
    
    function _eglWaitClient() {
        EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
        return 1;
      }function _eglWaitGL(
    ) {
    return _eglWaitClient();
    }
  
    function _eglWaitNative(nativeEngineId) {
        EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
        return 1;
      }
  
    function _emscripten_asm_const_int(code, sigPtr, argbuf) {
        var args = readAsmConstArgs(sigPtr, argbuf);
        return ASM_CONSTS[code].apply(null, args);
      }
  
    function _emscripten_async_wget(url, file, onload, onerror) {
        noExitRuntime = true;
    
        var _url = UTF8ToString(url);
        var _file = UTF8ToString(file);
        _file = PATH_FS.resolve(_file);
        function doCallback(callback) {
          if (callback) {
            var stack = stackSave();
            dynCall_vi(callback, allocate(intArrayFromString(_file), 'i8', ALLOC_STACK));
            stackRestore(stack);
          }
        }
        var destinationDirectory = PATH.dirname(_file);
        FS.createPreloadedFile(
          destinationDirectory,
          PATH.basename(_file),
          _url, true, true,
          function() {
            doCallback(onload);
          },
          function() {
            doCallback(onerror);
          },
          false, // dontCreateFile
          false, // canOwn
          function() { // preFinish
            // if a file exists there, we overwrite it
            try {
              FS.unlink(_file);
            } catch (e) {}
            // if the destination directory does not yet exist, create it
            FS.mkdirTree(destinationDirectory);
          }
        );
      }
  
    function _emscripten_async_wget_data(url, arg, onload, onerror) {
        Browser.asyncLoad(UTF8ToString(url), function(byteArray) {
          var buffer = _malloc(byteArray.length);
          HEAPU8.set(byteArray, buffer);
          dynCall_viii(onload, arg, buffer, byteArray.length);
          _free(buffer);
        }, function() {
          if (onerror) dynCall_vi(onerror, arg);
        }, true /* no need for run dependency, this is async but will not do any prepare etc. step */ );
      }
  
    
    var JSEvents={inEventHandler:0,removeAllEventListeners:function() {
          for(var i = JSEvents.eventHandlers.length-1; i >= 0; --i) {
            JSEvents._removeHandler(i);
          }
          JSEvents.eventHandlers = [];
          JSEvents.deferredCalls = [];
        },registerRemoveEventListeners:function() {
          if (!JSEvents.removeEventListenersRegistered) {
            __ATEXIT__.push(JSEvents.removeAllEventListeners);
            JSEvents.removeEventListenersRegistered = true;
          }
        },deferredCalls:[],deferCall:function(targetFunction, precedence, argsList) {
          function arraysHaveEqualContent(arrA, arrB) {
            if (arrA.length != arrB.length) return false;
    
            for(var i in arrA) {
              if (arrA[i] != arrB[i]) return false;
            }
            return true;
          }
          // Test if the given call was already queued, and if so, don't add it again.
          for(var i in JSEvents.deferredCalls) {
            var call = JSEvents.deferredCalls[i];
            if (call.targetFunction == targetFunction && arraysHaveEqualContent(call.argsList, argsList)) {
              return;
            }
          }
          JSEvents.deferredCalls.push({
            targetFunction: targetFunction,
            precedence: precedence,
            argsList: argsList
          });
    
          JSEvents.deferredCalls.sort(function(x,y) { return x.precedence < y.precedence; });
        },removeDeferredCalls:function(targetFunction) {
          for(var i = 0; i < JSEvents.deferredCalls.length; ++i) {
            if (JSEvents.deferredCalls[i].targetFunction == targetFunction) {
              JSEvents.deferredCalls.splice(i, 1);
              --i;
            }
          }
        },canPerformEventHandlerRequests:function() {
          return JSEvents.inEventHandler && JSEvents.currentEventHandler.allowsDeferredCalls;
        },runDeferredCalls:function() {
          if (!JSEvents.canPerformEventHandlerRequests()) {
            return;
          }
          for(var i = 0; i < JSEvents.deferredCalls.length; ++i) {
            var call = JSEvents.deferredCalls[i];
            JSEvents.deferredCalls.splice(i, 1);
            --i;
            call.targetFunction.apply(null, call.argsList);
          }
        },eventHandlers:[],removeAllHandlersOnTarget:function(target, eventTypeString) {
          for(var i = 0; i < JSEvents.eventHandlers.length; ++i) {
            if (JSEvents.eventHandlers[i].target == target && 
              (!eventTypeString || eventTypeString == JSEvents.eventHandlers[i].eventTypeString)) {
               JSEvents._removeHandler(i--);
             }
          }
        },_removeHandler:function(i) {
          var h = JSEvents.eventHandlers[i];
          h.target.removeEventListener(h.eventTypeString, h.eventListenerFunc, h.useCapture);
          JSEvents.eventHandlers.splice(i, 1);
        },registerOrRemoveHandler:function(eventHandler) {
          var jsEventHandler = function jsEventHandler(event) {
            // Increment nesting count for the event handler.
            ++JSEvents.inEventHandler;
            JSEvents.currentEventHandler = eventHandler;
            // Process any old deferred calls the user has placed.
            JSEvents.runDeferredCalls();
            // Process the actual event, calls back to user C code handler.
            eventHandler.handlerFunc(event);
            // Process any new deferred calls that were placed right now from this event handler.
            JSEvents.runDeferredCalls();
            // Out of event handler - restore nesting count.
            --JSEvents.inEventHandler;
          };
          
          if (eventHandler.callbackfunc) {
            eventHandler.eventListenerFunc = jsEventHandler;
            eventHandler.target.addEventListener(eventHandler.eventTypeString, jsEventHandler, eventHandler.useCapture);
            JSEvents.eventHandlers.push(eventHandler);
            JSEvents.registerRemoveEventListeners();
          } else {
            for(var i = 0; i < JSEvents.eventHandlers.length; ++i) {
              if (JSEvents.eventHandlers[i].target == eventHandler.target
               && JSEvents.eventHandlers[i].eventTypeString == eventHandler.eventTypeString) {
                 JSEvents._removeHandler(i--);
               }
            }
          }
        },getNodeNameForTarget:function(target) {
          if (!target) return '';
          if (target == window) return '#window';
          if (target == screen) return '#screen';
          return (target && target.nodeName) ? target.nodeName : '';
        },fullscreenEnabled:function() {
          return document.fullscreenEnabled
          // Safari 13.0.3 on macOS Catalina 10.15.1 still ships with prefixed webkitFullscreenEnabled.
          // TODO: If Safari at some point ships with unprefixed version, update the version check above.
          || document.webkitFullscreenEnabled
           ;
        }};
    
    var __currentFullscreenStrategy={};
    
    
    
    
    
    
    
    
    function maybeCStringToJsString(cString) {
        // "cString > 2" checks if the input is a number, and isn't of the special
        // values we accept here, EMSCRIPTEN_EVENT_TARGET_* (which map to 0, 1, 2).
        // In other words, if cString > 2 then it's a pointer to a valid place in
        // memory, and points to a C string.
        return cString > 2 ? UTF8ToString(cString) : cString;
      }
    
    var specialHTMLTargets=[0, typeof document !== 'undefined' ? document : 0, typeof window !== 'undefined' ? window : 0];function findEventTarget(target) {
        target = maybeCStringToJsString(target);
        var domElement = specialHTMLTargets[target] || (typeof document !== 'undefined' ? document.querySelector(target) : undefined);
        return domElement;
      }function findCanvasEventTarget(target) { return findEventTarget(target); }function _emscripten_get_canvas_element_size(target, width, height) {
        var canvas = findCanvasEventTarget(target);
        if (!canvas) return -4;
        HEAP32[((width)>>2)]=canvas.width;
        HEAP32[((height)>>2)]=canvas.height;
      }function __get_canvas_element_size(target) {
        var stackTop = stackSave();
        var w = stackAlloc(8);
        var h = w + 4;
    
        var targetInt = stackAlloc(target.id.length+1);
        stringToUTF8(target.id, targetInt, target.id.length+1);
        var ret = _emscripten_get_canvas_element_size(targetInt, w, h);
        var size = [HEAP32[((w)>>2)], HEAP32[((h)>>2)]];
        stackRestore(stackTop);
        return size;
      }
    
    
    function _emscripten_set_canvas_element_size(target, width, height) {
        var canvas = findCanvasEventTarget(target);
        if (!canvas) return -4;
        canvas.width = width;
        canvas.height = height;
        return 0;
      }function __set_canvas_element_size(target, width, height) {
        if (!target.controlTransferredOffscreen) {
          target.width = width;
          target.height = height;
        } else {
          // This function is being called from high-level JavaScript code instead of asm.js/Wasm,
          // and it needs to synchronously proxy over to another thread, so marshal the string onto the heap to do the call.
          var stackTop = stackSave();
          var targetInt = stackAlloc(target.id.length+1);
          stringToUTF8(target.id, targetInt, target.id.length+1);
          _emscripten_set_canvas_element_size(targetInt, width, height);
          stackRestore(stackTop);
        }
      }function __registerRestoreOldStyle(canvas) {
        var canvasSize = __get_canvas_element_size(canvas);
        var oldWidth = canvasSize[0];
        var oldHeight = canvasSize[1];
        var oldCssWidth = canvas.style.width;
        var oldCssHeight = canvas.style.height;
        var oldBackgroundColor = canvas.style.backgroundColor; // Chrome reads color from here.
        var oldDocumentBackgroundColor = document.body.style.backgroundColor; // IE11 reads color from here.
        // Firefox always has black background color.
        var oldPaddingLeft = canvas.style.paddingLeft; // Chrome, FF, Safari
        var oldPaddingRight = canvas.style.paddingRight;
        var oldPaddingTop = canvas.style.paddingTop;
        var oldPaddingBottom = canvas.style.paddingBottom;
        var oldMarginLeft = canvas.style.marginLeft; // IE11
        var oldMarginRight = canvas.style.marginRight;
        var oldMarginTop = canvas.style.marginTop;
        var oldMarginBottom = canvas.style.marginBottom;
        var oldDocumentBodyMargin = document.body.style.margin;
        var oldDocumentOverflow = document.documentElement.style.overflow; // Chrome, Firefox
        var oldDocumentScroll = document.body.scroll; // IE
        var oldImageRendering = canvas.style.imageRendering;
    
        function restoreOldStyle() {
          var fullscreenElement = document.fullscreenElement
            || document.webkitFullscreenElement
            || document.msFullscreenElement
            ;
          if (!fullscreenElement) {
            document.removeEventListener('fullscreenchange', restoreOldStyle);
    
    
            // Unprefixed Fullscreen API shipped in Chromium 71 (https://bugs.chromium.org/p/chromium/issues/detail?id=383813)
            // As of Safari 13.0.3 on macOS Catalina 10.15.1 still ships with prefixed webkitfullscreenchange. TODO: revisit this check once Safari ships unprefixed version.
            document.removeEventListener('webkitfullscreenchange', restoreOldStyle);
    
    
            __set_canvas_element_size(canvas, oldWidth, oldHeight);
    
            canvas.style.width = oldCssWidth;
            canvas.style.height = oldCssHeight;
            canvas.style.backgroundColor = oldBackgroundColor; // Chrome
            // IE11 hack: assigning 'undefined' or an empty string to document.body.style.backgroundColor has no effect, so first assign back the default color
            // before setting the undefined value. Setting undefined value is also important, or otherwise we would later treat that as something that the user
            // had explicitly set so subsequent fullscreen transitions would not set background color properly.
            if (!oldDocumentBackgroundColor) document.body.style.backgroundColor = 'white';
            document.body.style.backgroundColor = oldDocumentBackgroundColor; // IE11
            canvas.style.paddingLeft = oldPaddingLeft; // Chrome, FF, Safari
            canvas.style.paddingRight = oldPaddingRight;
            canvas.style.paddingTop = oldPaddingTop;
            canvas.style.paddingBottom = oldPaddingBottom;
            canvas.style.marginLeft = oldMarginLeft; // IE11
            canvas.style.marginRight = oldMarginRight;
            canvas.style.marginTop = oldMarginTop;
            canvas.style.marginBottom = oldMarginBottom;
            document.body.style.margin = oldDocumentBodyMargin;
            document.documentElement.style.overflow = oldDocumentOverflow; // Chrome, Firefox
            document.body.scroll = oldDocumentScroll; // IE
            canvas.style.imageRendering = oldImageRendering;
            if (canvas.GLctxObject) canvas.GLctxObject.GLctx.viewport(0, 0, oldWidth, oldHeight);
    
            if (__currentFullscreenStrategy.canvasResizedCallback) {
              dynCall_iiii(__currentFullscreenStrategy.canvasResizedCallback, 37, 0, __currentFullscreenStrategy.canvasResizedCallbackUserData);
            }
          }
        }
        document.addEventListener('fullscreenchange', restoreOldStyle);
        // Unprefixed Fullscreen API shipped in Chromium 71 (https://bugs.chromium.org/p/chromium/issues/detail?id=383813)
        // As of Safari 13.0.3 on macOS Catalina 10.15.1 still ships with prefixed webkitfullscreenchange. TODO: revisit this check once Safari ships unprefixed version.
        document.addEventListener('webkitfullscreenchange', restoreOldStyle);
        return restoreOldStyle;
      }
    
    function __setLetterbox(element, topBottom, leftRight) {
          // Cannot use margin to specify letterboxes in FF or Chrome, since those ignore margins in fullscreen mode.
          element.style.paddingLeft = element.style.paddingRight = leftRight + 'px';
          element.style.paddingTop = element.style.paddingBottom = topBottom + 'px';
      }
    
    function __getBoundingClientRect(e) {
        return specialHTMLTargets.indexOf(e) < 0 ? e.getBoundingClientRect() : {'left':0,'top':0};
      }function _JSEvents_resizeCanvasForFullscreen(target, strategy) {
        var restoreOldStyle = __registerRestoreOldStyle(target);
        var cssWidth = strategy.softFullscreen ? innerWidth : screen.width;
        var cssHeight = strategy.softFullscreen ? innerHeight : screen.height;
        var rect = __getBoundingClientRect(target);
        var windowedCssWidth = rect.width;
        var windowedCssHeight = rect.height;
        var canvasSize = __get_canvas_element_size(target);
        var windowedRttWidth = canvasSize[0];
        var windowedRttHeight = canvasSize[1];
    
        if (strategy.scaleMode == 3) {
          __setLetterbox(target, (cssHeight - windowedCssHeight) / 2, (cssWidth - windowedCssWidth) / 2);
          cssWidth = windowedCssWidth;
          cssHeight = windowedCssHeight;
        } else if (strategy.scaleMode == 2) {
          if (cssWidth*windowedRttHeight < windowedRttWidth*cssHeight) {
            var desiredCssHeight = windowedRttHeight * cssWidth / windowedRttWidth;
            __setLetterbox(target, (cssHeight - desiredCssHeight) / 2, 0);
            cssHeight = desiredCssHeight;
          } else {
            var desiredCssWidth = windowedRttWidth * cssHeight / windowedRttHeight;
            __setLetterbox(target, 0, (cssWidth - desiredCssWidth) / 2);
            cssWidth = desiredCssWidth;
          }
        }
    
        // If we are adding padding, must choose a background color or otherwise Chrome will give the
        // padding a default white color. Do it only if user has not customized their own background color.
        if (!target.style.backgroundColor) target.style.backgroundColor = 'black';
        // IE11 does the same, but requires the color to be set in the document body.
        if (!document.body.style.backgroundColor) document.body.style.backgroundColor = 'black'; // IE11
        // Firefox always shows black letterboxes independent of style color.
    
        target.style.width = cssWidth + 'px';
        target.style.height = cssHeight + 'px';
    
        if (strategy.filteringMode == 1) {
          target.style.imageRendering = 'optimizeSpeed';
          target.style.imageRendering = '-moz-crisp-edges';
          target.style.imageRendering = '-o-crisp-edges';
          target.style.imageRendering = '-webkit-optimize-contrast';
          target.style.imageRendering = 'optimize-contrast';
          target.style.imageRendering = 'crisp-edges';
          target.style.imageRendering = 'pixelated';
        }
    
        var dpiScale = (strategy.canvasResolutionScaleMode == 2) ? devicePixelRatio : 1;
        if (strategy.canvasResolutionScaleMode != 0) {
          var newWidth = (cssWidth * dpiScale)|0;
          var newHeight = (cssHeight * dpiScale)|0;
          __set_canvas_element_size(target, newWidth, newHeight);
          if (target.GLctxObject) target.GLctxObject.GLctx.viewport(0, 0, newWidth, newHeight);
        }
        return restoreOldStyle;
      }function _JSEvents_requestFullscreen(target, strategy) {
        // EMSCRIPTEN_FULLSCREEN_SCALE_DEFAULT + EMSCRIPTEN_FULLSCREEN_CANVAS_SCALE_NONE is a mode where no extra logic is performed to the DOM elements.
        if (strategy.scaleMode != 0 || strategy.canvasResolutionScaleMode != 0) {
          _JSEvents_resizeCanvasForFullscreen(target, strategy);
        }
    
        if (target.requestFullscreen) {
          target.requestFullscreen();
        } else if (target.webkitRequestFullscreen) {
          target.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
        } else {
          return JSEvents.fullscreenEnabled() ? -3 : -1;
        }
    
        __currentFullscreenStrategy = strategy;
    
        if (strategy.canvasResizedCallback) {
          dynCall_iiii(strategy.canvasResizedCallback, 37, 0, strategy.canvasResizedCallbackUserData);
        }
    
        return 0;
      }function _emscripten_exit_fullscreen() {
        if (!JSEvents.fullscreenEnabled()) return -1;
        // Make sure no queued up calls will fire after this.
        JSEvents.removeDeferredCalls(_JSEvents_requestFullscreen);
    
        var d = specialHTMLTargets[1];
        if (d.exitFullscreen) {
          d.fullscreenElement && d.exitFullscreen();
        } else if (d.webkitExitFullscreen) {
          d.webkitFullscreenElement && d.webkitExitFullscreen();
        } else {
          return -1;
        }
    
        return 0;
      }
  
    
    function __requestPointerLock(target) {
        if (target.requestPointerLock) {
          target.requestPointerLock();
        } else if (target.msRequestPointerLock) {
          target.msRequestPointerLock();
        } else {
          // document.body is known to accept pointer lock, so use that to differentiate if the user passed a bad element,
          // or if the whole browser just doesn't support the feature.
          if (document.body.requestPointerLock
            || document.body.msRequestPointerLock
            ) {
            return -3;
          } else {
            return -1;
          }
        }
        return 0;
      }function _emscripten_exit_pointerlock() {
        // Make sure no queued up calls will fire after this.
        JSEvents.removeDeferredCalls(__requestPointerLock);
    
        if (document.exitPointerLock) {
          document.exitPointerLock();
        } else if (document.msExitPointerLock) {
          document.msExitPointerLock();
        } else {
          return -1;
        }
        return 0;
      }
  
    function _emscripten_get_device_pixel_ratio() {
        return (typeof devicePixelRatio === 'number' && devicePixelRatio) || 1.0;
      }
  
    function _emscripten_get_element_css_size(target, width, height) {
        target = findEventTarget(target);
        if (!target) return -4;
    
        var rect = __getBoundingClientRect(target);
        HEAPF64[((width)>>3)]=rect.width;
        HEAPF64[((height)>>3)]=rect.height;
    
        return 0;
      }
  
    
    function __fillGamepadEventData(eventStruct, e) {
        HEAPF64[((eventStruct)>>3)]=e.timestamp;
        for(var i = 0; i < e.axes.length; ++i) {
          HEAPF64[(((eventStruct+i*8)+(16))>>3)]=e.axes[i];
        }
        for(var i = 0; i < e.buttons.length; ++i) {
          if (typeof(e.buttons[i]) === 'object') {
            HEAPF64[(((eventStruct+i*8)+(528))>>3)]=e.buttons[i].value;
          } else {
            HEAPF64[(((eventStruct+i*8)+(528))>>3)]=e.buttons[i];
          }
        }
        for(var i = 0; i < e.buttons.length; ++i) {
          if (typeof(e.buttons[i]) === 'object') {
            HEAP32[(((eventStruct+i*4)+(1040))>>2)]=e.buttons[i].pressed;
          } else {
            // Assigning a boolean to HEAP32, that's ok, but Closure would like to warn about it:
            /** @suppress {checkTypes} */
            HEAP32[(((eventStruct+i*4)+(1040))>>2)]=e.buttons[i] == 1;
          }
        }
        HEAP32[(((eventStruct)+(1296))>>2)]=e.connected;
        HEAP32[(((eventStruct)+(1300))>>2)]=e.index;
        HEAP32[(((eventStruct)+(8))>>2)]=e.axes.length;
        HEAP32[(((eventStruct)+(12))>>2)]=e.buttons.length;
        stringToUTF8(e.id, eventStruct + 1304, 64);
        stringToUTF8(e.mapping, eventStruct + 1368, 64);
      }function _emscripten_get_gamepad_status(index, gamepadState) {
    
        // INVALID_PARAM is returned on a Gamepad index that never was there.
        if (index < 0 || index >= JSEvents.lastGamepadState.length) return -5;
    
        // NO_DATA is returned on a Gamepad index that was removed.
        // For previously disconnected gamepads there should be an empty slot (null/undefined/false) at the index.
        // This is because gamepads must keep their original position in the array.
        // For example, removing the first of two gamepads produces [null/undefined/false, gamepad].
        if (!JSEvents.lastGamepadState[index]) return -7;
    
        __fillGamepadEventData(gamepadState, JSEvents.lastGamepadState[index]);
        return 0;
      }
  
    function _emscripten_get_num_gamepads() {
        // N.B. Do not call emscripten_get_num_gamepads() unless having first called emscripten_sample_gamepad_data(), and that has returned EMSCRIPTEN_RESULT_SUCCESS.
        // Otherwise the following line will throw an exception.
        return JSEvents.lastGamepadState.length;
      }
  
    function _emscripten_get_sbrk_ptr() {
        return 128736;
      }
  
    function _emscripten_glActiveTexture(x0) { GLctx['activeTexture'](x0) }
  
    function _emscripten_glAttachShader(program, shader) {
        GLctx.attachShader(GL.programs[program],
                                GL.shaders[shader]);
      }
  
    function _emscripten_glBeginQueryEXT(target, id) {
        GLctx.disjointTimerQueryExt['beginQueryEXT'](target, GL.timerQueriesEXT[id]);
      }
  
    function _emscripten_glBindAttribLocation(program, index, name) {
        GLctx.bindAttribLocation(GL.programs[program], index, UTF8ToString(name));
      }
  
    function _emscripten_glBindBuffer(target, buffer) {
    
        GLctx.bindBuffer(target, GL.buffers[buffer]);
      }
  
    function _emscripten_glBindFramebuffer(target, framebuffer) {
    
        GLctx.bindFramebuffer(target, GL.framebuffers[framebuffer]);
    
      }
  
    function _emscripten_glBindRenderbuffer(target, renderbuffer) {
        GLctx.bindRenderbuffer(target, GL.renderbuffers[renderbuffer]);
      }
  
    function _emscripten_glBindTexture(target, texture) {
        GLctx.bindTexture(target, GL.textures[texture]);
      }
  
    function _emscripten_glBindVertexArrayOES(vao) {
        GLctx['bindVertexArray'](GL.vaos[vao]);
      }
  
    function _emscripten_glBlendColor(x0, x1, x2, x3) { GLctx['blendColor'](x0, x1, x2, x3) }
  
    function _emscripten_glBlendEquation(x0) { GLctx['blendEquation'](x0) }
  
    function _emscripten_glBlendEquationSeparate(x0, x1) { GLctx['blendEquationSeparate'](x0, x1) }
  
    function _emscripten_glBlendFunc(x0, x1) { GLctx['blendFunc'](x0, x1) }
  
    function _emscripten_glBlendFuncSeparate(x0, x1, x2, x3) { GLctx['blendFuncSeparate'](x0, x1, x2, x3) }
  
    function _emscripten_glBufferData(target, size, data, usage) {
    
          // N.b. here first form specifies a heap subarray, second form an integer size, so the ?: code here is polymorphic. It is advised to avoid
          // randomly mixing both uses in calling code, to avoid any potential JS engine JIT issues.
          GLctx.bufferData(target, data ? HEAPU8.subarray(data, data+size) : size, usage);
      }
  
    function _emscripten_glBufferSubData(target, offset, size, data) {
        GLctx.bufferSubData(target, offset, HEAPU8.subarray(data, data+size));
      }
  
    function _emscripten_glCheckFramebufferStatus(x0) { return GLctx['checkFramebufferStatus'](x0) }
  
    function _emscripten_glClear(x0) { GLctx['clear'](x0) }
  
    function _emscripten_glClearColor(x0, x1, x2, x3) { GLctx['clearColor'](x0, x1, x2, x3) }
  
    function _emscripten_glClearDepthf(x0) { GLctx['clearDepth'](x0) }
  
    function _emscripten_glClearStencil(x0) { GLctx['clearStencil'](x0) }
  
    function _emscripten_glColorMask(red, green, blue, alpha) {
        GLctx.colorMask(!!red, !!green, !!blue, !!alpha);
      }
  
    function _emscripten_glCompileShader(shader) {
        GLctx.compileShader(GL.shaders[shader]);
      }
  
    function _emscripten_glCompressedTexImage2D(target, level, internalFormat, width, height, border, imageSize, data) {
        GLctx['compressedTexImage2D'](target, level, internalFormat, width, height, border, data ? HEAPU8.subarray((data),(data+imageSize)) : null);
      }
  
    function _emscripten_glCompressedTexSubImage2D(target, level, xoffset, yoffset, width, height, format, imageSize, data) {
        GLctx['compressedTexSubImage2D'](target, level, xoffset, yoffset, width, height, format, data ? HEAPU8.subarray((data),(data+imageSize)) : null);
      }
  
    function _emscripten_glCopyTexImage2D(x0, x1, x2, x3, x4, x5, x6, x7) { GLctx['copyTexImage2D'](x0, x1, x2, x3, x4, x5, x6, x7) }
  
    function _emscripten_glCopyTexSubImage2D(x0, x1, x2, x3, x4, x5, x6, x7) { GLctx['copyTexSubImage2D'](x0, x1, x2, x3, x4, x5, x6, x7) }
  
    function _emscripten_glCreateProgram() {
        var id = GL.getNewId(GL.programs);
        var program = GLctx.createProgram();
        program.name = id;
        GL.programs[id] = program;
        return id;
      }
  
    function _emscripten_glCreateShader(shaderType) {
        var id = GL.getNewId(GL.shaders);
        GL.shaders[id] = GLctx.createShader(shaderType);
        return id;
      }
  
    function _emscripten_glCullFace(x0) { GLctx['cullFace'](x0) }
  
    function _emscripten_glDeleteBuffers(n, buffers) {
        for (var i = 0; i < n; i++) {
          var id = HEAP32[(((buffers)+(i*4))>>2)];
          var buffer = GL.buffers[id];
    
          // From spec: "glDeleteBuffers silently ignores 0's and names that do not
          // correspond to existing buffer objects."
          if (!buffer) continue;
    
          GLctx.deleteBuffer(buffer);
          buffer.name = 0;
          GL.buffers[id] = null;
    
        }
      }
  
    function _emscripten_glDeleteFramebuffers(n, framebuffers) {
        for (var i = 0; i < n; ++i) {
          var id = HEAP32[(((framebuffers)+(i*4))>>2)];
          var framebuffer = GL.framebuffers[id];
          if (!framebuffer) continue; // GL spec: "glDeleteFramebuffers silently ignores 0s and names that do not correspond to existing framebuffer objects".
          GLctx.deleteFramebuffer(framebuffer);
          framebuffer.name = 0;
          GL.framebuffers[id] = null;
        }
      }
  
    function _emscripten_glDeleteProgram(id) {
        if (!id) return;
        var program = GL.programs[id];
        if (!program) { // glDeleteProgram actually signals an error when deleting a nonexisting object, unlike some other GL delete functions.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
        GLctx.deleteProgram(program);
        program.name = 0;
        GL.programs[id] = null;
        GL.programInfos[id] = null;
      }
  
    function _emscripten_glDeleteQueriesEXT(n, ids) {
        for (var i = 0; i < n; i++) {
          var id = HEAP32[(((ids)+(i*4))>>2)];
          var query = GL.timerQueriesEXT[id];
          if (!query) continue; // GL spec: "unused names in ids are ignored, as is the name zero."
          GLctx.disjointTimerQueryExt['deleteQueryEXT'](query);
          GL.timerQueriesEXT[id] = null;
        }
      }
  
    function _emscripten_glDeleteRenderbuffers(n, renderbuffers) {
        for (var i = 0; i < n; i++) {
          var id = HEAP32[(((renderbuffers)+(i*4))>>2)];
          var renderbuffer = GL.renderbuffers[id];
          if (!renderbuffer) continue; // GL spec: "glDeleteRenderbuffers silently ignores 0s and names that do not correspond to existing renderbuffer objects".
          GLctx.deleteRenderbuffer(renderbuffer);
          renderbuffer.name = 0;
          GL.renderbuffers[id] = null;
        }
      }
  
    function _emscripten_glDeleteShader(id) {
        if (!id) return;
        var shader = GL.shaders[id];
        if (!shader) { // glDeleteShader actually signals an error when deleting a nonexisting object, unlike some other GL delete functions.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
        GLctx.deleteShader(shader);
        GL.shaders[id] = null;
      }
  
    function _emscripten_glDeleteTextures(n, textures) {
        for (var i = 0; i < n; i++) {
          var id = HEAP32[(((textures)+(i*4))>>2)];
          var texture = GL.textures[id];
          if (!texture) continue; // GL spec: "glDeleteTextures silently ignores 0s and names that do not correspond to existing textures".
          GLctx.deleteTexture(texture);
          texture.name = 0;
          GL.textures[id] = null;
        }
      }
  
    function _emscripten_glDeleteVertexArraysOES(n, vaos) {
        for (var i = 0; i < n; i++) {
          var id = HEAP32[(((vaos)+(i*4))>>2)];
          GLctx['deleteVertexArray'](GL.vaos[id]);
          GL.vaos[id] = null;
        }
      }
  
    function _emscripten_glDepthFunc(x0) { GLctx['depthFunc'](x0) }
  
    function _emscripten_glDepthMask(flag) {
        GLctx.depthMask(!!flag);
      }
  
    function _emscripten_glDepthRangef(x0, x1) { GLctx['depthRange'](x0, x1) }
  
    function _emscripten_glDetachShader(program, shader) {
        GLctx.detachShader(GL.programs[program],
                                GL.shaders[shader]);
      }
  
    function _emscripten_glDisable(x0) { GLctx['disable'](x0) }
  
    function _emscripten_glDisableVertexAttribArray(index) {
        GLctx.disableVertexAttribArray(index);
      }
  
    function _emscripten_glDrawArrays(mode, first, count) {
    
        GLctx.drawArrays(mode, first, count);
    
      }
  
    function _emscripten_glDrawArraysInstancedANGLE(mode, first, count, primcount) {
        GLctx['drawArraysInstanced'](mode, first, count, primcount);
      }
  
    
    var tempFixedLengthArray=[];function _emscripten_glDrawBuffersWEBGL(n, bufs) {
    
        var bufArray = tempFixedLengthArray[n];
        for (var i = 0; i < n; i++) {
          bufArray[i] = HEAP32[(((bufs)+(i*4))>>2)];
        }
    
        GLctx['drawBuffers'](bufArray);
      }
  
    function _emscripten_glDrawElements(mode, count, type, indices) {
    
        GLctx.drawElements(mode, count, type, indices);
    
      }
  
    function _emscripten_glDrawElementsInstancedANGLE(mode, count, type, indices, primcount) {
        GLctx['drawElementsInstanced'](mode, count, type, indices, primcount);
      }
  
    function _emscripten_glEnable(x0) { GLctx['enable'](x0) }
  
    function _emscripten_glEnableVertexAttribArray(index) {
        GLctx.enableVertexAttribArray(index);
      }
  
    function _emscripten_glEndQueryEXT(target) {
        GLctx.disjointTimerQueryExt['endQueryEXT'](target);
      }
  
    function _emscripten_glFinish() { GLctx['finish']() }
  
    function _emscripten_glFlush() { GLctx['flush']() }
  
    function _emscripten_glFramebufferRenderbuffer(target, attachment, renderbuffertarget, renderbuffer) {
        GLctx.framebufferRenderbuffer(target, attachment, renderbuffertarget,
                                           GL.renderbuffers[renderbuffer]);
      }
  
    function _emscripten_glFramebufferTexture2D(target, attachment, textarget, texture, level) {
        GLctx.framebufferTexture2D(target, attachment, textarget,
                                        GL.textures[texture], level);
      }
  
    function _emscripten_glFrontFace(x0) { GLctx['frontFace'](x0) }
  
    
    function __glGenObject(n, buffers, createFunction, objectTable
        ) {
        for (var i = 0; i < n; i++) {
          var buffer = GLctx[createFunction]();
          var id = buffer && GL.getNewId(objectTable);
          if (buffer) {
            buffer.name = id;
            objectTable[id] = buffer;
          } else {
            GL.recordError(0x502 /* GL_INVALID_OPERATION */);
          }
          HEAP32[(((buffers)+(i*4))>>2)]=id;
        }
      }function _emscripten_glGenBuffers(n, buffers) {
        __glGenObject(n, buffers, 'createBuffer', GL.buffers
          );
      }
  
    function _emscripten_glGenFramebuffers(n, ids) {
        __glGenObject(n, ids, 'createFramebuffer', GL.framebuffers
          );
      }
  
    function _emscripten_glGenQueriesEXT(n, ids) {
        for (var i = 0; i < n; i++) {
          var query = GLctx.disjointTimerQueryExt['createQueryEXT']();
          if (!query) {
            GL.recordError(0x502 /* GL_INVALID_OPERATION */);
            while(i < n) HEAP32[(((ids)+(i++*4))>>2)]=0;
            return;
          }
          var id = GL.getNewId(GL.timerQueriesEXT);
          query.name = id;
          GL.timerQueriesEXT[id] = query;
          HEAP32[(((ids)+(i*4))>>2)]=id;
        }
      }
  
    function _emscripten_glGenRenderbuffers(n, renderbuffers) {
        __glGenObject(n, renderbuffers, 'createRenderbuffer', GL.renderbuffers
          );
      }
  
    function _emscripten_glGenTextures(n, textures) {
        __glGenObject(n, textures, 'createTexture', GL.textures
          );
      }
  
    function _emscripten_glGenVertexArraysOES(n, arrays) {
        __glGenObject(n, arrays, 'createVertexArray', GL.vaos
          );
      }
  
    function _emscripten_glGenerateMipmap(x0) { GLctx['generateMipmap'](x0) }
  
    
    function __glGetActiveAttribOrUniform(funcName, program, index, bufSize, length, size, type, name) {
        program = GL.programs[program];
        var info = GLctx[funcName](program, index);
        if (info) { // If an error occurs, nothing will be written to length, size and type and name.
          var numBytesWrittenExclNull = name && stringToUTF8(info.name, name, bufSize);
          if (length) HEAP32[((length)>>2)]=numBytesWrittenExclNull;
          if (size) HEAP32[((size)>>2)]=info.size;
          if (type) HEAP32[((type)>>2)]=info.type;
        }
      }function _emscripten_glGetActiveAttrib(program, index, bufSize, length, size, type, name) {
        __glGetActiveAttribOrUniform('getActiveAttrib', program, index, bufSize, length, size, type, name);
      }
  
    function _emscripten_glGetActiveUniform(program, index, bufSize, length, size, type, name) {
        __glGetActiveAttribOrUniform('getActiveUniform', program, index, bufSize, length, size, type, name);
      }
  
    function _emscripten_glGetAttachedShaders(program, maxCount, count, shaders) {
        var result = GLctx.getAttachedShaders(GL.programs[program]);
        var len = result.length;
        if (len > maxCount) {
          len = maxCount;
        }
        HEAP32[((count)>>2)]=len;
        for (var i = 0; i < len; ++i) {
          var id = GL.shaders.indexOf(result[i]);
          HEAP32[(((shaders)+(i*4))>>2)]=id;
        }
      }
  
    function _emscripten_glGetAttribLocation(program, name) {
        return GLctx.getAttribLocation(GL.programs[program], UTF8ToString(name));
      }
  
    
    
    function writeI53ToI64(ptr, num) {
        HEAPU32[ptr>>2] = num;
        HEAPU32[ptr+4>>2] = (num - HEAPU32[ptr>>2])/4294967296;
      }function emscriptenWebGLGet(name_, p, type) {
        // Guard against user passing a null pointer.
        // Note that GLES2 spec does not say anything about how passing a null pointer should be treated.
        // Testing on desktop core GL 3, the application crashes on glGetIntegerv to a null pointer, but
        // better to report an error instead of doing anything random.
        if (!p) {
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
        var ret = undefined;
        switch(name_) { // Handle a few trivial GLES values
          case 0x8DFA: // GL_SHADER_COMPILER
            ret = 1;
            break;
          case 0x8DF8: // GL_SHADER_BINARY_FORMATS
            if (type != 0 && type != 1) {
              GL.recordError(0x500); // GL_INVALID_ENUM
            }
            return; // Do not write anything to the out pointer, since no binary formats are supported.
          case 0x8DF9: // GL_NUM_SHADER_BINARY_FORMATS
            ret = 0;
            break;
          case 0x86A2: // GL_NUM_COMPRESSED_TEXTURE_FORMATS
            // WebGL doesn't have GL_NUM_COMPRESSED_TEXTURE_FORMATS (it's obsolete since GL_COMPRESSED_TEXTURE_FORMATS returns a JS array that can be queried for length),
            // so implement it ourselves to allow C++ GLES2 code get the length.
            var formats = GLctx.getParameter(0x86A3 /*GL_COMPRESSED_TEXTURE_FORMATS*/);
            ret = formats ? formats.length : 0;
            break;
        }
    
        if (ret === undefined) {
          var result = GLctx.getParameter(name_);
          switch (typeof(result)) {
            case "number":
              ret = result;
              break;
            case "boolean":
              ret = result ? 1 : 0;
              break;
            case "string":
              GL.recordError(0x500); // GL_INVALID_ENUM
              return;
            case "object":
              if (result === null) {
                // null is a valid result for some (e.g., which buffer is bound - perhaps nothing is bound), but otherwise
                // can mean an invalid name_, which we need to report as an error
                switch(name_) {
                  case 0x8894: // ARRAY_BUFFER_BINDING
                  case 0x8B8D: // CURRENT_PROGRAM
                  case 0x8895: // ELEMENT_ARRAY_BUFFER_BINDING
                  case 0x8CA6: // FRAMEBUFFER_BINDING or DRAW_FRAMEBUFFER_BINDING
                  case 0x8CA7: // RENDERBUFFER_BINDING
                  case 0x8069: // TEXTURE_BINDING_2D
                  case 0x85B5: // WebGL 2 GL_VERTEX_ARRAY_BINDING, or WebGL 1 extension OES_vertex_array_object GL_VERTEX_ARRAY_BINDING_OES
                  case 0x8514: { // TEXTURE_BINDING_CUBE_MAP
                    ret = 0;
                    break;
                  }
                  default: {
                    GL.recordError(0x500); // GL_INVALID_ENUM
                    return;
                  }
                }
              } else if (result instanceof Float32Array ||
                         result instanceof Uint32Array ||
                         result instanceof Int32Array ||
                         result instanceof Array) {
                for (var i = 0; i < result.length; ++i) {
                  switch (type) {
                    case 0: HEAP32[(((p)+(i*4))>>2)]=result[i]; break;
                    case 2: HEAPF32[(((p)+(i*4))>>2)]=result[i]; break;
                    case 4: HEAP8[(((p)+(i))>>0)]=result[i] ? 1 : 0; break;
                  }
                }
                return;
              } else {
                try {
                  ret = result.name | 0;
                } catch(e) {
                  GL.recordError(0x500); // GL_INVALID_ENUM
                  err('GL_INVALID_ENUM in glGet' + type + 'v: Unknown object returned from WebGL getParameter(' + name_ + ')! (error: ' + e + ')');
                  return;
                }
              }
              break;
            default:
              GL.recordError(0x500); // GL_INVALID_ENUM
              err('GL_INVALID_ENUM in glGet' + type + 'v: Native code calling glGet' + type + 'v(' + name_ + ') and it returns ' + result + ' of type ' + typeof(result) + '!');
              return;
          }
        }
    
        switch (type) {
          case 1: writeI53ToI64(p, ret); break;
          case 0: HEAP32[((p)>>2)]=ret; break;
          case 2:   HEAPF32[((p)>>2)]=ret; break;
          case 4: HEAP8[((p)>>0)]=ret ? 1 : 0; break;
        }
      }function _emscripten_glGetBooleanv(name_, p) {
        emscriptenWebGLGet(name_, p, 4);
      }
  
    function _emscripten_glGetBufferParameteriv(target, value, data) {
        if (!data) {
          // GLES2 specification does not specify how to behave if data is a null pointer. Since calling this function does not make sense
          // if data == null, issue a GL error to notify user about it.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
        HEAP32[((data)>>2)]=GLctx.getBufferParameter(target, value);
      }
  
    function _emscripten_glGetError() {
        var error = GLctx.getError() || GL.lastError;
        GL.lastError = 0/*GL_NO_ERROR*/;
        return error;
      }
  
    function _emscripten_glGetFloatv(name_, p) {
        emscriptenWebGLGet(name_, p, 2);
      }
  
    function _emscripten_glGetFramebufferAttachmentParameteriv(target, attachment, pname, params) {
        var result = GLctx.getFramebufferAttachmentParameter(target, attachment, pname);
        if (result instanceof WebGLRenderbuffer ||
            result instanceof WebGLTexture) {
          result = result.name | 0;
        }
        HEAP32[((params)>>2)]=result;
      }
  
    function _emscripten_glGetIntegerv(name_, p) {
        emscriptenWebGLGet(name_, p, 0);
      }
  
    function _emscripten_glGetProgramInfoLog(program, maxLength, length, infoLog) {
        var log = GLctx.getProgramInfoLog(GL.programs[program]);
        if (log === null) log = '(unknown error)';
        var numBytesWrittenExclNull = (maxLength > 0 && infoLog) ? stringToUTF8(log, infoLog, maxLength) : 0;
        if (length) HEAP32[((length)>>2)]=numBytesWrittenExclNull;
      }
  
    function _emscripten_glGetProgramiv(program, pname, p) {
        if (!p) {
          // GLES2 specification does not specify how to behave if p is a null pointer. Since calling this function does not make sense
          // if p == null, issue a GL error to notify user about it.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
    
        if (program >= GL.counter) {
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
    
        var ptable = GL.programInfos[program];
        if (!ptable) {
          GL.recordError(0x502 /* GL_INVALID_OPERATION */);
          return;
        }
    
        if (pname == 0x8B84) { // GL_INFO_LOG_LENGTH
          var log = GLctx.getProgramInfoLog(GL.programs[program]);
          if (log === null) log = '(unknown error)';
          HEAP32[((p)>>2)]=log.length + 1;
        } else if (pname == 0x8B87 /* GL_ACTIVE_UNIFORM_MAX_LENGTH */) {
          HEAP32[((p)>>2)]=ptable.maxUniformLength;
        } else if (pname == 0x8B8A /* GL_ACTIVE_ATTRIBUTE_MAX_LENGTH */) {
          if (ptable.maxAttributeLength == -1) {
            program = GL.programs[program];
            var numAttribs = GLctx.getProgramParameter(program, 0x8B89/*GL_ACTIVE_ATTRIBUTES*/);
            ptable.maxAttributeLength = 0; // Spec says if there are no active attribs, 0 must be returned.
            for (var i = 0; i < numAttribs; ++i) {
              var activeAttrib = GLctx.getActiveAttrib(program, i);
              ptable.maxAttributeLength = Math.max(ptable.maxAttributeLength, activeAttrib.name.length+1);
            }
          }
          HEAP32[((p)>>2)]=ptable.maxAttributeLength;
        } else if (pname == 0x8A35 /* GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH */) {
          if (ptable.maxUniformBlockNameLength == -1) {
            program = GL.programs[program];
            var numBlocks = GLctx.getProgramParameter(program, 0x8A36/*GL_ACTIVE_UNIFORM_BLOCKS*/);
            ptable.maxUniformBlockNameLength = 0;
            for (var i = 0; i < numBlocks; ++i) {
              var activeBlockName = GLctx.getActiveUniformBlockName(program, i);
              ptable.maxUniformBlockNameLength = Math.max(ptable.maxUniformBlockNameLength, activeBlockName.length+1);
            }
          }
          HEAP32[((p)>>2)]=ptable.maxUniformBlockNameLength;
        } else {
          HEAP32[((p)>>2)]=GLctx.getProgramParameter(GL.programs[program], pname);
        }
      }
  
    function _emscripten_glGetQueryObjecti64vEXT(id, pname, params) {
        if (!params) {
          // GLES2 specification does not specify how to behave if params is a null pointer. Since calling this function does not make sense
          // if p == null, issue a GL error to notify user about it.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
        var query = GL.timerQueriesEXT[id];
        var param = GLctx.disjointTimerQueryExt['getQueryObjectEXT'](query, pname);
        var ret;
        if (typeof param == 'boolean') {
          ret = param ? 1 : 0;
        } else {
          ret = param;
        }
        writeI53ToI64(params, ret);
      }
  
    function _emscripten_glGetQueryObjectivEXT(id, pname, params) {
        if (!params) {
          // GLES2 specification does not specify how to behave if params is a null pointer. Since calling this function does not make sense
          // if p == null, issue a GL error to notify user about it.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
        var query = GL.timerQueriesEXT[id];
        var param = GLctx.disjointTimerQueryExt['getQueryObjectEXT'](query, pname);
        var ret;
        if (typeof param == 'boolean') {
          ret = param ? 1 : 0;
        } else {
          ret = param;
        }
        HEAP32[((params)>>2)]=ret;
      }
  
    function _emscripten_glGetQueryObjectui64vEXT(id, pname, params) {
        if (!params) {
          // GLES2 specification does not specify how to behave if params is a null pointer. Since calling this function does not make sense
          // if p == null, issue a GL error to notify user about it.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
        var query = GL.timerQueriesEXT[id];
        var param = GLctx.disjointTimerQueryExt['getQueryObjectEXT'](query, pname);
        var ret;
        if (typeof param == 'boolean') {
          ret = param ? 1 : 0;
        } else {
          ret = param;
        }
        writeI53ToI64(params, ret);
      }
  
    function _emscripten_glGetQueryObjectuivEXT(id, pname, params) {
        if (!params) {
          // GLES2 specification does not specify how to behave if params is a null pointer. Since calling this function does not make sense
          // if p == null, issue a GL error to notify user about it.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
        var query = GL.timerQueriesEXT[id];
        var param = GLctx.disjointTimerQueryExt['getQueryObjectEXT'](query, pname);
        var ret;
        if (typeof param == 'boolean') {
          ret = param ? 1 : 0;
        } else {
          ret = param;
        }
        HEAP32[((params)>>2)]=ret;
      }
  
    function _emscripten_glGetQueryivEXT(target, pname, params) {
        if (!params) {
          // GLES2 specification does not specify how to behave if params is a null pointer. Since calling this function does not make sense
          // if p == null, issue a GL error to notify user about it.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
        HEAP32[((params)>>2)]=GLctx.disjointTimerQueryExt['getQueryEXT'](target, pname);
      }
  
    function _emscripten_glGetRenderbufferParameteriv(target, pname, params) {
        if (!params) {
          // GLES2 specification does not specify how to behave if params is a null pointer. Since calling this function does not make sense
          // if params == null, issue a GL error to notify user about it.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
        HEAP32[((params)>>2)]=GLctx.getRenderbufferParameter(target, pname);
      }
  
    function _emscripten_glGetShaderInfoLog(shader, maxLength, length, infoLog) {
        var log = GLctx.getShaderInfoLog(GL.shaders[shader]);
        if (log === null) log = '(unknown error)';
        var numBytesWrittenExclNull = (maxLength > 0 && infoLog) ? stringToUTF8(log, infoLog, maxLength) : 0;
        if (length) HEAP32[((length)>>2)]=numBytesWrittenExclNull;
      }
  
    function _emscripten_glGetShaderPrecisionFormat(shaderType, precisionType, range, precision) {
        var result = GLctx.getShaderPrecisionFormat(shaderType, precisionType);
        HEAP32[((range)>>2)]=result.rangeMin;
        HEAP32[(((range)+(4))>>2)]=result.rangeMax;
        HEAP32[((precision)>>2)]=result.precision;
      }
  
    function _emscripten_glGetShaderSource(shader, bufSize, length, source) {
        var result = GLctx.getShaderSource(GL.shaders[shader]);
        if (!result) return; // If an error occurs, nothing will be written to length or source.
        var numBytesWrittenExclNull = (bufSize > 0 && source) ? stringToUTF8(result, source, bufSize) : 0;
        if (length) HEAP32[((length)>>2)]=numBytesWrittenExclNull;
      }
  
    function _emscripten_glGetShaderiv(shader, pname, p) {
        if (!p) {
          // GLES2 specification does not specify how to behave if p is a null pointer. Since calling this function does not make sense
          // if p == null, issue a GL error to notify user about it.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
        if (pname == 0x8B84) { // GL_INFO_LOG_LENGTH
          var log = GLctx.getShaderInfoLog(GL.shaders[shader]);
          if (log === null) log = '(unknown error)';
          // The GLES2 specification says that if the shader has an empty info log,
          // a value of 0 is returned. Otherwise the log has a null char appended.
          // (An empty string is falsey, so we can just check that instead of
          // looking at log.length.)
          var logLength = log ? log.length + 1 : 0;
          HEAP32[((p)>>2)]=logLength;
        } else if (pname == 0x8B88) { // GL_SHADER_SOURCE_LENGTH
          var source = GLctx.getShaderSource(GL.shaders[shader]);
          // source may be a null, or the empty string, both of which are falsey
          // values that we report a 0 length for.
          var sourceLength = source ? source.length + 1 : 0;
          HEAP32[((p)>>2)]=sourceLength;
        } else {
          HEAP32[((p)>>2)]=GLctx.getShaderParameter(GL.shaders[shader], pname);
        }
      }
  
    
    function stringToNewUTF8(jsString) {
        var length = lengthBytesUTF8(jsString)+1;
        var cString = _malloc(length);
        stringToUTF8(jsString, cString, length);
        return cString;
      }function _emscripten_glGetString(name_) {
        if (GL.stringCache[name_]) return GL.stringCache[name_];
        var ret;
        switch(name_) {
          case 0x1F03 /* GL_EXTENSIONS */:
            var exts = GLctx.getSupportedExtensions() || []; // .getSupportedExtensions() can return null if context is lost, so coerce to empty array.
            exts = exts.concat(exts.map(function(e) { return "GL_" + e; }));
            ret = stringToNewUTF8(exts.join(' '));
            break;
          case 0x1F00 /* GL_VENDOR */:
          case 0x1F01 /* GL_RENDERER */:
          case 0x9245 /* UNMASKED_VENDOR_WEBGL */:
          case 0x9246 /* UNMASKED_RENDERER_WEBGL */:
            var s = GLctx.getParameter(name_);
            if (!s) {
              GL.recordError(0x500/*GL_INVALID_ENUM*/);
            }
            ret = stringToNewUTF8(s);
            break;
    
          case 0x1F02 /* GL_VERSION */:
            var glVersion = GLctx.getParameter(0x1F02 /*GL_VERSION*/);
            // return GLES version string corresponding to the version of the WebGL context
            {
              glVersion = 'OpenGL ES 2.0 (' + glVersion + ')';
            }
            ret = stringToNewUTF8(glVersion);
            break;
          case 0x8B8C /* GL_SHADING_LANGUAGE_VERSION */:
            var glslVersion = GLctx.getParameter(0x8B8C /*GL_SHADING_LANGUAGE_VERSION*/);
            // extract the version number 'N.M' from the string 'WebGL GLSL ES N.M ...'
            var ver_re = /^WebGL GLSL ES ([0-9]\.[0-9][0-9]?)(?:$| .*)/;
            var ver_num = glslVersion.match(ver_re);
            if (ver_num !== null) {
              if (ver_num[1].length == 3) ver_num[1] = ver_num[1] + '0'; // ensure minor version has 2 digits
              glslVersion = 'OpenGL ES GLSL ES ' + ver_num[1] + ' (' + glslVersion + ')';
            }
            ret = stringToNewUTF8(glslVersion);
            break;
          default:
            GL.recordError(0x500/*GL_INVALID_ENUM*/);
            return 0;
        }
        GL.stringCache[name_] = ret;
        return ret;
      }
  
    function _emscripten_glGetTexParameterfv(target, pname, params) {
        if (!params) {
          // GLES2 specification does not specify how to behave if params is a null pointer. Since calling this function does not make sense
          // if p == null, issue a GL error to notify user about it.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
        HEAPF32[((params)>>2)]=GLctx.getTexParameter(target, pname);
      }
  
    function _emscripten_glGetTexParameteriv(target, pname, params) {
        if (!params) {
          // GLES2 specification does not specify how to behave if params is a null pointer. Since calling this function does not make sense
          // if p == null, issue a GL error to notify user about it.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
        HEAP32[((params)>>2)]=GLctx.getTexParameter(target, pname);
      }
  
    
    /** @suppress {checkTypes} */
    function jstoi_q(str) {
        return parseInt(str);
      }function _emscripten_glGetUniformLocation(program, name) {
        name = UTF8ToString(name);
    
        var arrayIndex = 0;
        // If user passed an array accessor "[index]", parse the array index off the accessor.
        if (name[name.length - 1] == ']') {
          var leftBrace = name.lastIndexOf('[');
          arrayIndex = name[leftBrace+1] != ']' ? jstoi_q(name.slice(leftBrace + 1)) : 0; // "index]", parseInt will ignore the ']' at the end; but treat "foo[]" as "foo[0]"
          name = name.slice(0, leftBrace);
        }
    
        var uniformInfo = GL.programInfos[program] && GL.programInfos[program].uniforms[name]; // returns pair [ dimension_of_uniform_array, uniform_location ]
        if (uniformInfo && arrayIndex >= 0 && arrayIndex < uniformInfo[0]) { // Check if user asked for an out-of-bounds element, i.e. for 'vec4 colors[3];' user could ask for 'colors[10]' which should return -1.
          return uniformInfo[1] + arrayIndex;
        } else {
          return -1;
        }
      }
  
    
    /** @suppress{checkTypes} */
    function emscriptenWebGLGetUniform(program, location, params, type) {
        if (!params) {
          // GLES2 specification does not specify how to behave if params is a null pointer. Since calling this function does not make sense
          // if params == null, issue a GL error to notify user about it.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
        var data = GLctx.getUniform(GL.programs[program], GL.uniforms[location]);
        if (typeof data == 'number' || typeof data == 'boolean') {
          switch (type) {
            case 0: HEAP32[((params)>>2)]=data; break;
            case 2: HEAPF32[((params)>>2)]=data; break;
          }
        } else {
          for (var i = 0; i < data.length; i++) {
            switch (type) {
              case 0: HEAP32[(((params)+(i*4))>>2)]=data[i]; break;
              case 2: HEAPF32[(((params)+(i*4))>>2)]=data[i]; break;
            }
          }
        }
      }function _emscripten_glGetUniformfv(program, location, params) {
        emscriptenWebGLGetUniform(program, location, params, 2);
      }
  
    function _emscripten_glGetUniformiv(program, location, params) {
        emscriptenWebGLGetUniform(program, location, params, 0);
      }
  
    function _emscripten_glGetVertexAttribPointerv(index, pname, pointer) {
        if (!pointer) {
          // GLES2 specification does not specify how to behave if pointer is a null pointer. Since calling this function does not make sense
          // if pointer == null, issue a GL error to notify user about it.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
        HEAP32[((pointer)>>2)]=GLctx.getVertexAttribOffset(index, pname);
      }
  
    
    /** @suppress{checkTypes} */
    function emscriptenWebGLGetVertexAttrib(index, pname, params, type) {
        if (!params) {
          // GLES2 specification does not specify how to behave if params is a null pointer. Since calling this function does not make sense
          // if params == null, issue a GL error to notify user about it.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
        var data = GLctx.getVertexAttrib(index, pname);
        if (pname == 0x889F/*VERTEX_ATTRIB_ARRAY_BUFFER_BINDING*/) {
          HEAP32[((params)>>2)]=data && data["name"];
        } else if (typeof data == 'number' || typeof data == 'boolean') {
          switch (type) {
            case 0: HEAP32[((params)>>2)]=data; break;
            case 2: HEAPF32[((params)>>2)]=data; break;
            case 5: HEAP32[((params)>>2)]=Math.fround(data); break;
          }
        } else {
          for (var i = 0; i < data.length; i++) {
            switch (type) {
              case 0: HEAP32[(((params)+(i*4))>>2)]=data[i]; break;
              case 2: HEAPF32[(((params)+(i*4))>>2)]=data[i]; break;
              case 5: HEAP32[(((params)+(i*4))>>2)]=Math.fround(data[i]); break;
            }
          }
        }
      }function _emscripten_glGetVertexAttribfv(index, pname, params) {
        // N.B. This function may only be called if the vertex attribute was specified using the function glVertexAttrib*f(),
        // otherwise the results are undefined. (GLES3 spec 6.1.12)
        emscriptenWebGLGetVertexAttrib(index, pname, params, 2);
      }
  
    function _emscripten_glGetVertexAttribiv(index, pname, params) {
        // N.B. This function may only be called if the vertex attribute was specified using the function glVertexAttrib*f(),
        // otherwise the results are undefined. (GLES3 spec 6.1.12)
        emscriptenWebGLGetVertexAttrib(index, pname, params, 5);
      }
  
    function _emscripten_glHint(x0, x1) { GLctx['hint'](x0, x1) }
  
    function _emscripten_glIsBuffer(buffer) {
        var b = GL.buffers[buffer];
        if (!b) return 0;
        return GLctx.isBuffer(b);
      }
  
    function _emscripten_glIsEnabled(x0) { return GLctx['isEnabled'](x0) }
  
    function _emscripten_glIsFramebuffer(framebuffer) {
        var fb = GL.framebuffers[framebuffer];
        if (!fb) return 0;
        return GLctx.isFramebuffer(fb);
      }
  
    function _emscripten_glIsProgram(program) {
        program = GL.programs[program];
        if (!program) return 0;
        return GLctx.isProgram(program);
      }
  
    function _emscripten_glIsQueryEXT(id) {
        var query = GL.timerQueriesEXT[id];
        if (!query) return 0;
        return GLctx.disjointTimerQueryExt['isQueryEXT'](query);
      }
  
    function _emscripten_glIsRenderbuffer(renderbuffer) {
        var rb = GL.renderbuffers[renderbuffer];
        if (!rb) return 0;
        return GLctx.isRenderbuffer(rb);
      }
  
    function _emscripten_glIsShader(shader) {
        var s = GL.shaders[shader];
        if (!s) return 0;
        return GLctx.isShader(s);
      }
  
    function _emscripten_glIsTexture(id) {
        var texture = GL.textures[id];
        if (!texture) return 0;
        return GLctx.isTexture(texture);
      }
  
    function _emscripten_glIsVertexArrayOES(array) {
    
        var vao = GL.vaos[array];
        if (!vao) return 0;
        return GLctx['isVertexArray'](vao);
      }
  
    function _emscripten_glLineWidth(x0) { GLctx['lineWidth'](x0) }
  
    function _emscripten_glLinkProgram(program) {
        GLctx.linkProgram(GL.programs[program]);
        GL.populateUniformTable(program);
      }
  
    function _emscripten_glPixelStorei(pname, param) {
        if (pname == 0xCF5 /* GL_UNPACK_ALIGNMENT */) {
          GL.unpackAlignment = param;
        }
        GLctx.pixelStorei(pname, param);
      }
  
    function _emscripten_glPolygonOffset(x0, x1) { GLctx['polygonOffset'](x0, x1) }
  
    function _emscripten_glQueryCounterEXT(id, target) {
        GLctx.disjointTimerQueryExt['queryCounterEXT'](GL.timerQueriesEXT[id], target);
      }
  
    
    
    function computeUnpackAlignedImageSize(width, height, sizePerPixel, alignment) {
        function roundedToNextMultipleOf(x, y) {
          return (x + y - 1) & -y;
        }
        var plainRowSize = width * sizePerPixel;
        var alignedRowSize = roundedToNextMultipleOf(plainRowSize, alignment);
        return height * alignedRowSize;
      }
    
    function __colorChannelsInGlTextureFormat(format) {
        // Micro-optimizations for size: map format to size by subtracting smallest enum value (0x1902) from all values first.
        // Also omit the most common size value (1) from the list, which is assumed by formats not on the list.
        var colorChannels = {
          // 0x1902 /* GL_DEPTH_COMPONENT */ - 0x1902: 1,
          // 0x1906 /* GL_ALPHA */ - 0x1902: 1,
          5: 3,
          6: 4,
          // 0x1909 /* GL_LUMINANCE */ - 0x1902: 1,
          8: 2,
          29502: 3,
          29504: 4,
        };
        return colorChannels[format - 0x1902]||1;
      }
    
    function heapObjectForWebGLType(type) {
        // Micro-optimization for size: Subtract lowest GL enum number (0x1400/* GL_BYTE */) from type to compare
        // smaller values for the heap, for shorter generated code size.
        // Also the type HEAPU16 is not tested for explicitly, but any unrecognized type will return out HEAPU16.
        // (since most types are HEAPU16)
        type -= 0x1400;
    
        if (type == 1) return HEAPU8;
    
    
        if (type == 4) return HEAP32;
    
        if (type == 6) return HEAPF32;
    
        if (type == 5
          || type == 28922
          )
          return HEAPU32;
    
        return HEAPU16;
      }
    
    function heapAccessShiftForWebGLHeap(heap) {
        return 31 - Math.clz32(heap.BYTES_PER_ELEMENT);
      }function emscriptenWebGLGetTexPixelData(type, format, width, height, pixels, internalFormat) {
        var heap = heapObjectForWebGLType(type);
        var shift = heapAccessShiftForWebGLHeap(heap);
        var byteSize = 1<<shift;
        var sizePerPixel = __colorChannelsInGlTextureFormat(format) * byteSize;
        var bytes = computeUnpackAlignedImageSize(width, height, sizePerPixel, GL.unpackAlignment);
        return heap.subarray(pixels >> shift, pixels + bytes >> shift);
      }function _emscripten_glReadPixels(x, y, width, height, format, type, pixels) {
        var pixelData = emscriptenWebGLGetTexPixelData(type, format, width, height, pixels, format);
        if (!pixelData) {
          GL.recordError(0x500/*GL_INVALID_ENUM*/);
          return;
        }
        GLctx.readPixels(x, y, width, height, format, type, pixelData);
      }
  
    function _emscripten_glReleaseShaderCompiler() {
        // NOP (as allowed by GLES 2.0 spec)
      }
  
    function _emscripten_glRenderbufferStorage(x0, x1, x2, x3) { GLctx['renderbufferStorage'](x0, x1, x2, x3) }
  
    function _emscripten_glSampleCoverage(value, invert) {
        GLctx.sampleCoverage(value, !!invert);
      }
  
    function _emscripten_glScissor(x0, x1, x2, x3) { GLctx['scissor'](x0, x1, x2, x3) }
  
    function _emscripten_glShaderBinary() {
        GL.recordError(0x500/*GL_INVALID_ENUM*/);
      }
  
    function _emscripten_glShaderSource(shader, count, string, length) {
        var source = GL.getSource(shader, count, string, length);
    
    
        GLctx.shaderSource(GL.shaders[shader], source);
      }
  
    function _emscripten_glStencilFunc(x0, x1, x2) { GLctx['stencilFunc'](x0, x1, x2) }
  
    function _emscripten_glStencilFuncSeparate(x0, x1, x2, x3) { GLctx['stencilFuncSeparate'](x0, x1, x2, x3) }
  
    function _emscripten_glStencilMask(x0) { GLctx['stencilMask'](x0) }
  
    function _emscripten_glStencilMaskSeparate(x0, x1) { GLctx['stencilMaskSeparate'](x0, x1) }
  
    function _emscripten_glStencilOp(x0, x1, x2) { GLctx['stencilOp'](x0, x1, x2) }
  
    function _emscripten_glStencilOpSeparate(x0, x1, x2, x3) { GLctx['stencilOpSeparate'](x0, x1, x2, x3) }
  
    function _emscripten_glTexImage2D(target, level, internalFormat, width, height, border, format, type, pixels) {
        GLctx.texImage2D(target, level, internalFormat, width, height, border, format, type, pixels ? emscriptenWebGLGetTexPixelData(type, format, width, height, pixels, internalFormat) : null);
      }
  
    function _emscripten_glTexParameterf(x0, x1, x2) { GLctx['texParameterf'](x0, x1, x2) }
  
    function _emscripten_glTexParameterfv(target, pname, params) {
        var param = HEAPF32[((params)>>2)];
        GLctx.texParameterf(target, pname, param);
      }
  
    function _emscripten_glTexParameteri(x0, x1, x2) { GLctx['texParameteri'](x0, x1, x2) }
  
    function _emscripten_glTexParameteriv(target, pname, params) {
        var param = HEAP32[((params)>>2)];
        GLctx.texParameteri(target, pname, param);
      }
  
    function _emscripten_glTexSubImage2D(target, level, xoffset, yoffset, width, height, format, type, pixels) {
        var pixelData = null;
        if (pixels) pixelData = emscriptenWebGLGetTexPixelData(type, format, width, height, pixels, 0);
        GLctx.texSubImage2D(target, level, xoffset, yoffset, width, height, format, type, pixelData);
      }
  
    function _emscripten_glUniform1f(location, v0) {
        GLctx.uniform1f(GL.uniforms[location], v0);
      }
  
    
    var miniTempWebGLFloatBuffers=[];function _emscripten_glUniform1fv(location, count, value) {
    
    
    
        if (count <= 288) {
          // avoid allocation when uploading few enough uniforms
          var view = miniTempWebGLFloatBuffers[count-1];
          for (var i = 0; i < count; ++i) {
            view[i] = HEAPF32[(((value)+(4*i))>>2)];
          }
        } else
        {
          var view = HEAPF32.subarray((value)>>2,(value+count*4)>>2);
        }
        GLctx.uniform1fv(GL.uniforms[location], view);
      }
  
    function _emscripten_glUniform1i(location, v0) {
        GLctx.uniform1i(GL.uniforms[location], v0);
      }
  
    
    var __miniTempWebGLIntBuffers=[];function _emscripten_glUniform1iv(location, count, value) {
    
    
    
        if (count <= 288) {
          // avoid allocation when uploading few enough uniforms
          var view = __miniTempWebGLIntBuffers[count-1];
          for (var i = 0; i < count; ++i) {
            view[i] = HEAP32[(((value)+(4*i))>>2)];
          }
        } else
        {
          var view = HEAP32.subarray((value)>>2,(value+count*4)>>2);
        }
        GLctx.uniform1iv(GL.uniforms[location], view);
      }
  
    function _emscripten_glUniform2f(location, v0, v1) {
        GLctx.uniform2f(GL.uniforms[location], v0, v1);
      }
  
    function _emscripten_glUniform2fv(location, count, value) {
    
    
    
        if (count <= 144) {
          // avoid allocation when uploading few enough uniforms
          var view = miniTempWebGLFloatBuffers[2*count-1];
          for (var i = 0; i < 2*count; i += 2) {
            view[i] = HEAPF32[(((value)+(4*i))>>2)];
            view[i+1] = HEAPF32[(((value)+(4*i+4))>>2)];
          }
        } else
        {
          var view = HEAPF32.subarray((value)>>2,(value+count*8)>>2);
        }
        GLctx.uniform2fv(GL.uniforms[location], view);
      }
  
    function _emscripten_glUniform2i(location, v0, v1) {
        GLctx.uniform2i(GL.uniforms[location], v0, v1);
      }
  
    function _emscripten_glUniform2iv(location, count, value) {
    
    
    
        if (count <= 144) {
          // avoid allocation when uploading few enough uniforms
          var view = __miniTempWebGLIntBuffers[2*count-1];
          for (var i = 0; i < 2*count; i += 2) {
            view[i] = HEAP32[(((value)+(4*i))>>2)];
            view[i+1] = HEAP32[(((value)+(4*i+4))>>2)];
          }
        } else
        {
          var view = HEAP32.subarray((value)>>2,(value+count*8)>>2);
        }
        GLctx.uniform2iv(GL.uniforms[location], view);
      }
  
    function _emscripten_glUniform3f(location, v0, v1, v2) {
        GLctx.uniform3f(GL.uniforms[location], v0, v1, v2);
      }
  
    function _emscripten_glUniform3fv(location, count, value) {
    
    
    
        if (count <= 96) {
          // avoid allocation when uploading few enough uniforms
          var view = miniTempWebGLFloatBuffers[3*count-1];
          for (var i = 0; i < 3*count; i += 3) {
            view[i] = HEAPF32[(((value)+(4*i))>>2)];
            view[i+1] = HEAPF32[(((value)+(4*i+4))>>2)];
            view[i+2] = HEAPF32[(((value)+(4*i+8))>>2)];
          }
        } else
        {
          var view = HEAPF32.subarray((value)>>2,(value+count*12)>>2);
        }
        GLctx.uniform3fv(GL.uniforms[location], view);
      }
  
    function _emscripten_glUniform3i(location, v0, v1, v2) {
        GLctx.uniform3i(GL.uniforms[location], v0, v1, v2);
      }
  
    function _emscripten_glUniform3iv(location, count, value) {
    
    
    
        if (count <= 96) {
          // avoid allocation when uploading few enough uniforms
          var view = __miniTempWebGLIntBuffers[3*count-1];
          for (var i = 0; i < 3*count; i += 3) {
            view[i] = HEAP32[(((value)+(4*i))>>2)];
            view[i+1] = HEAP32[(((value)+(4*i+4))>>2)];
            view[i+2] = HEAP32[(((value)+(4*i+8))>>2)];
          }
        } else
        {
          var view = HEAP32.subarray((value)>>2,(value+count*12)>>2);
        }
        GLctx.uniform3iv(GL.uniforms[location], view);
      }
  
    function _emscripten_glUniform4f(location, v0, v1, v2, v3) {
        GLctx.uniform4f(GL.uniforms[location], v0, v1, v2, v3);
      }
  
    function _emscripten_glUniform4fv(location, count, value) {
    
    
    
        if (count <= 72) {
          // avoid allocation when uploading few enough uniforms
          var view = miniTempWebGLFloatBuffers[4*count-1];
          // hoist the heap out of the loop for size and for pthreads+growth.
          var heap = HEAPF32;
          value >>= 2;
          for (var i = 0; i < 4 * count; i += 4) {
            var dst = value + i;
            view[i] = heap[dst];
            view[i + 1] = heap[dst + 1];
            view[i + 2] = heap[dst + 2];
            view[i + 3] = heap[dst + 3];
          }
        } else
        {
          var view = HEAPF32.subarray((value)>>2,(value+count*16)>>2);
        }
        GLctx.uniform4fv(GL.uniforms[location], view);
      }
  
    function _emscripten_glUniform4i(location, v0, v1, v2, v3) {
        GLctx.uniform4i(GL.uniforms[location], v0, v1, v2, v3);
      }
  
    function _emscripten_glUniform4iv(location, count, value) {
    
    
    
        if (count <= 72) {
          // avoid allocation when uploading few enough uniforms
          var view = __miniTempWebGLIntBuffers[4*count-1];
          for (var i = 0; i < 4*count; i += 4) {
            view[i] = HEAP32[(((value)+(4*i))>>2)];
            view[i+1] = HEAP32[(((value)+(4*i+4))>>2)];
            view[i+2] = HEAP32[(((value)+(4*i+8))>>2)];
            view[i+3] = HEAP32[(((value)+(4*i+12))>>2)];
          }
        } else
        {
          var view = HEAP32.subarray((value)>>2,(value+count*16)>>2);
        }
        GLctx.uniform4iv(GL.uniforms[location], view);
      }
  
    function _emscripten_glUniformMatrix2fv(location, count, transpose, value) {
    
    
    
        if (count <= 72) {
          // avoid allocation when uploading few enough uniforms
          var view = miniTempWebGLFloatBuffers[4*count-1];
          for (var i = 0; i < 4*count; i += 4) {
            view[i] = HEAPF32[(((value)+(4*i))>>2)];
            view[i+1] = HEAPF32[(((value)+(4*i+4))>>2)];
            view[i+2] = HEAPF32[(((value)+(4*i+8))>>2)];
            view[i+3] = HEAPF32[(((value)+(4*i+12))>>2)];
          }
        } else
        {
          var view = HEAPF32.subarray((value)>>2,(value+count*16)>>2);
        }
        GLctx.uniformMatrix2fv(GL.uniforms[location], !!transpose, view);
      }
  
    function _emscripten_glUniformMatrix3fv(location, count, transpose, value) {
    
    
    
        if (count <= 32) {
          // avoid allocation when uploading few enough uniforms
          var view = miniTempWebGLFloatBuffers[9*count-1];
          for (var i = 0; i < 9*count; i += 9) {
            view[i] = HEAPF32[(((value)+(4*i))>>2)];
            view[i+1] = HEAPF32[(((value)+(4*i+4))>>2)];
            view[i+2] = HEAPF32[(((value)+(4*i+8))>>2)];
            view[i+3] = HEAPF32[(((value)+(4*i+12))>>2)];
            view[i+4] = HEAPF32[(((value)+(4*i+16))>>2)];
            view[i+5] = HEAPF32[(((value)+(4*i+20))>>2)];
            view[i+6] = HEAPF32[(((value)+(4*i+24))>>2)];
            view[i+7] = HEAPF32[(((value)+(4*i+28))>>2)];
            view[i+8] = HEAPF32[(((value)+(4*i+32))>>2)];
          }
        } else
        {
          var view = HEAPF32.subarray((value)>>2,(value+count*36)>>2);
        }
        GLctx.uniformMatrix3fv(GL.uniforms[location], !!transpose, view);
      }
  
    function _emscripten_glUniformMatrix4fv(location, count, transpose, value) {
    
    
    
        if (count <= 18) {
          // avoid allocation when uploading few enough uniforms
          var view = miniTempWebGLFloatBuffers[16*count-1];
          // hoist the heap out of the loop for size and for pthreads+growth.
          var heap = HEAPF32;
          value >>= 2;
          for (var i = 0; i < 16 * count; i += 16) {
            var dst = value + i;
            view[i] = heap[dst];
            view[i + 1] = heap[dst + 1];
            view[i + 2] = heap[dst + 2];
            view[i + 3] = heap[dst + 3];
            view[i + 4] = heap[dst + 4];
            view[i + 5] = heap[dst + 5];
            view[i + 6] = heap[dst + 6];
            view[i + 7] = heap[dst + 7];
            view[i + 8] = heap[dst + 8];
            view[i + 9] = heap[dst + 9];
            view[i + 10] = heap[dst + 10];
            view[i + 11] = heap[dst + 11];
            view[i + 12] = heap[dst + 12];
            view[i + 13] = heap[dst + 13];
            view[i + 14] = heap[dst + 14];
            view[i + 15] = heap[dst + 15];
          }
        } else
        {
          var view = HEAPF32.subarray((value)>>2,(value+count*64)>>2);
        }
        GLctx.uniformMatrix4fv(GL.uniforms[location], !!transpose, view);
      }
  
    function _emscripten_glUseProgram(program) {
        GLctx.useProgram(GL.programs[program]);
      }
  
    function _emscripten_glValidateProgram(program) {
        GLctx.validateProgram(GL.programs[program]);
      }
  
    function _emscripten_glVertexAttrib1f(x0, x1) { GLctx['vertexAttrib1f'](x0, x1) }
  
    function _emscripten_glVertexAttrib1fv(index, v) {
    
        GLctx.vertexAttrib1f(index, HEAPF32[v>>2]);
      }
  
    function _emscripten_glVertexAttrib2f(x0, x1, x2) { GLctx['vertexAttrib2f'](x0, x1, x2) }
  
    function _emscripten_glVertexAttrib2fv(index, v) {
    
        GLctx.vertexAttrib2f(index, HEAPF32[v>>2], HEAPF32[v+4>>2]);
      }
  
    function _emscripten_glVertexAttrib3f(x0, x1, x2, x3) { GLctx['vertexAttrib3f'](x0, x1, x2, x3) }
  
    function _emscripten_glVertexAttrib3fv(index, v) {
    
        GLctx.vertexAttrib3f(index, HEAPF32[v>>2], HEAPF32[v+4>>2], HEAPF32[v+8>>2]);
      }
  
    function _emscripten_glVertexAttrib4f(x0, x1, x2, x3, x4) { GLctx['vertexAttrib4f'](x0, x1, x2, x3, x4) }
  
    function _emscripten_glVertexAttrib4fv(index, v) {
    
        GLctx.vertexAttrib4f(index, HEAPF32[v>>2], HEAPF32[v+4>>2], HEAPF32[v+8>>2], HEAPF32[v+12>>2]);
      }
  
    function _emscripten_glVertexAttribDivisorANGLE(index, divisor) {
        GLctx['vertexAttribDivisor'](index, divisor);
      }
  
    function _emscripten_glVertexAttribPointer(index, size, type, normalized, stride, ptr) {
        GLctx.vertexAttribPointer(index, size, type, !!normalized, stride, ptr);
      }
  
    function _emscripten_glViewport(x0, x1, x2, x3) { GLctx['viewport'](x0, x1, x2, x3) }
  
    function _emscripten_has_asyncify() {
        return 0;
      }
  
    function _emscripten_memcpy_big(dest, src, num) {
        HEAPU8.copyWithin(dest, src, src + num);
      }
  
    
    function __emscripten_do_request_fullscreen(target, strategy) {
        if (!JSEvents.fullscreenEnabled()) return -1;
        target = findEventTarget(target);
        if (!target) return -4;
    
        if (!target.requestFullscreen
          && !target.webkitRequestFullscreen
          ) {
          return -3;
        }
    
        var canPerformRequests = JSEvents.canPerformEventHandlerRequests();
    
        // Queue this function call if we're not currently in an event handler and the user saw it appropriate to do so.
        if (!canPerformRequests) {
          if (strategy.deferUntilInEventHandler) {
            JSEvents.deferCall(_JSEvents_requestFullscreen, 1 /* priority over pointer lock */, [target, strategy]);
            return 1;
          } else {
            return -2;
          }
        }
    
        return _JSEvents_requestFullscreen(target, strategy);
      }function _emscripten_request_fullscreen_strategy(target, deferUntilInEventHandler, fullscreenStrategy) {
        var strategy = {
          scaleMode: HEAP32[((fullscreenStrategy)>>2)],
          canvasResolutionScaleMode: HEAP32[(((fullscreenStrategy)+(4))>>2)],
          filteringMode: HEAP32[(((fullscreenStrategy)+(8))>>2)],
          deferUntilInEventHandler: deferUntilInEventHandler,
          canvasResizedCallback: HEAP32[(((fullscreenStrategy)+(12))>>2)],
          canvasResizedCallbackUserData: HEAP32[(((fullscreenStrategy)+(16))>>2)]
        };
    
        return __emscripten_do_request_fullscreen(target, strategy);
      }
  
    function _emscripten_request_pointerlock(target, deferUntilInEventHandler) {
        target = findEventTarget(target);
        if (!target) return -4;
        if (!target.requestPointerLock
          && !target.msRequestPointerLock
          ) {
          return -1;
        }
    
        var canPerformRequests = JSEvents.canPerformEventHandlerRequests();
    
        // Queue this function call if we're not currently in an event handler and the user saw it appropriate to do so.
        if (!canPerformRequests) {
          if (deferUntilInEventHandler) {
            JSEvents.deferCall(__requestPointerLock, 2 /* priority below fullscreen */, [target]);
            return 1;
          } else {
            return -2;
          }
        }
    
        return __requestPointerLock(target);
      }
  
    
    function _emscripten_get_heap_size() {
        return HEAPU8.length;
      }
    
    function emscripten_realloc_buffer(size) {
        try {
          // round size grow request up to wasm page size (fixed 64KB per spec)
          wasmMemory.grow((size - buffer.byteLength + 65535) >>> 16); // .grow() takes a delta compared to the previous size
          updateGlobalBufferAndViews(wasmMemory.buffer);
          return 1 /*success*/;
        } catch(e) {
        }
      }function _emscripten_resize_heap(requestedSize) {
        requestedSize = requestedSize >>> 0;
        var oldSize = _emscripten_get_heap_size();
        // With pthreads, races can happen (another thread might increase the size in between), so return a failure, and let the caller retry.
    
    
        var PAGE_MULTIPLE = 65536;
    
        // Memory resize rules:
        // 1. When resizing, always produce a resized heap that is at least 16MB (to avoid tiny heap sizes receiving lots of repeated resizes at startup)
        // 2. Always increase heap size to at least the requested size, rounded up to next page multiple.
        // 3a. If MEMORY_GROWTH_LINEAR_STEP == -1, excessively resize the heap geometrically: increase the heap size according to 
        //                                         MEMORY_GROWTH_GEOMETRIC_STEP factor (default +20%),
        //                                         At most overreserve by MEMORY_GROWTH_GEOMETRIC_CAP bytes (default 96MB).
        // 3b. If MEMORY_GROWTH_LINEAR_STEP != -1, excessively resize the heap linearly: increase the heap size by at least MEMORY_GROWTH_LINEAR_STEP bytes.
        // 4. Max size for the heap is capped at 2048MB-PAGE_MULTIPLE, or by MAXIMUM_MEMORY, or by ASAN limit, depending on which is smallest
        // 5. If we were unable to allocate as much memory, it may be due to over-eager decision to excessively reserve due to (3) above.
        //    Hence if an allocation fails, cut down on the amount of excess growth, in an attempt to succeed to perform a smaller allocation.
    
        // A limit was set for how much we can grow. We should not exceed that
        // (the wasm binary specifies it, so if we tried, we'd fail anyhow).
        var maxHeapSize = 2147483648;
        if (requestedSize > maxHeapSize) {
          return false;
        }
    
        var minHeapSize = 16777216;
    
        // Loop through potential heap size increases. If we attempt a too eager reservation that fails, cut down on the
        // attempted size and reserve a smaller bump instead. (max 3 times, chosen somewhat arbitrarily)
        for(var cutDown = 1; cutDown <= 4; cutDown *= 2) {
          var overGrownHeapSize = oldSize * (1 + 0.2 / cutDown); // ensure geometric growth
          // but limit overreserving (default to capping at +96MB overgrowth at most)
          overGrownHeapSize = Math.min(overGrownHeapSize, requestedSize + 100663296 );
    
    
          var newSize = Math.min(maxHeapSize, alignUp(Math.max(minHeapSize, requestedSize, overGrownHeapSize), PAGE_MULTIPLE));
    
          var replacement = emscripten_realloc_buffer(newSize);
          if (replacement) {
    
            return true;
          }
        }
        return false;
      }
  
    function _emscripten_sample_gamepad_data() {
        return (JSEvents.lastGamepadState = (navigator.getGamepads ? navigator.getGamepads() : (navigator.webkitGetGamepads ? navigator.webkitGetGamepads() : null)))
          ? 0 : -1;
      }
  
    
    function __registerBeforeUnloadEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString) {
        var beforeUnloadEventHandlerFunc = function(ev) {
          var e = ev || event;
    
          // Note: This is always called on the main browser thread, since it needs synchronously return a value!
          var confirmationMessage = dynCall_iiii(callbackfunc, eventTypeId, 0, userData);
          
          if (confirmationMessage) {
            confirmationMessage = UTF8ToString(confirmationMessage);
          }
          if (confirmationMessage) {
            e.preventDefault();
            e.returnValue = confirmationMessage;
            return confirmationMessage;
          }
        };
    
        var eventHandler = {
          target: findEventTarget(target),
          eventTypeString: eventTypeString,
          callbackfunc: callbackfunc,
          handlerFunc: beforeUnloadEventHandlerFunc,
          useCapture: useCapture
        };
        JSEvents.registerOrRemoveHandler(eventHandler);
      }function _emscripten_set_beforeunload_callback_on_thread(userData, callbackfunc, targetThread) {
        if (typeof onbeforeunload === 'undefined') return -1;
        // beforeunload callback can only be registered on the main browser thread, because the page will go away immediately after returning from the handler,
        // and there is no time to start proxying it anywhere.
        if (targetThread !== 1) return -5;
        __registerBeforeUnloadEventCallback(2, userData, true, callbackfunc, 28, "beforeunload");
        return 0;
      }
  
    
    function __registerFocusEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
        if (!JSEvents.focusEvent) JSEvents.focusEvent = _malloc( 256 );
    
        var focusEventHandlerFunc = function(ev) {
          var e = ev || event;
    
          var nodeName = JSEvents.getNodeNameForTarget(e.target);
          var id = e.target.id ? e.target.id : '';
    
          var focusEvent = JSEvents.focusEvent;
          stringToUTF8(nodeName, focusEvent + 0, 128);
          stringToUTF8(id, focusEvent + 128, 128);
    
          if (dynCall_iiii(callbackfunc, eventTypeId, focusEvent, userData)) e.preventDefault();
        };
    
        var eventHandler = {
          target: findEventTarget(target),
          eventTypeString: eventTypeString,
          callbackfunc: callbackfunc,
          handlerFunc: focusEventHandlerFunc,
          useCapture: useCapture
        };
        JSEvents.registerOrRemoveHandler(eventHandler);
      }function _emscripten_set_blur_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
        __registerFocusEventCallback(target, userData, useCapture, callbackfunc, 12, "blur", targetThread);
        return 0;
      }
  
  
    function _emscripten_set_element_css_size(target, width, height) {
        target = findEventTarget(target);
        if (!target) return -4;
    
        target.style.width = width + "px";
        target.style.height = height + "px";
    
        return 0;
      }
  
    function _emscripten_set_focus_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
        __registerFocusEventCallback(target, userData, useCapture, callbackfunc, 13, "focus", targetThread);
        return 0;
      }
  
    
    
    function __fillFullscreenChangeEventData(eventStruct) {
        var fullscreenElement = document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement;
        var isFullscreen = !!fullscreenElement;
        /** @suppress{checkTypes} */
        HEAP32[((eventStruct)>>2)]=isFullscreen;
        HEAP32[(((eventStruct)+(4))>>2)]=JSEvents.fullscreenEnabled();
        // If transitioning to fullscreen, report info about the element that is now fullscreen.
        // If transitioning to windowed mode, report info about the element that just was fullscreen.
        var reportedElement = isFullscreen ? fullscreenElement : JSEvents.previousFullscreenElement;
        var nodeName = JSEvents.getNodeNameForTarget(reportedElement);
        var id = (reportedElement && reportedElement.id) ? reportedElement.id : '';
        stringToUTF8(nodeName, eventStruct + 8, 128);
        stringToUTF8(id, eventStruct + 136, 128);
        HEAP32[(((eventStruct)+(264))>>2)]=reportedElement ? reportedElement.clientWidth : 0;
        HEAP32[(((eventStruct)+(268))>>2)]=reportedElement ? reportedElement.clientHeight : 0;
        HEAP32[(((eventStruct)+(272))>>2)]=screen.width;
        HEAP32[(((eventStruct)+(276))>>2)]=screen.height;
        if (isFullscreen) {
          JSEvents.previousFullscreenElement = fullscreenElement;
        }
      }function __registerFullscreenChangeEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
        if (!JSEvents.fullscreenChangeEvent) JSEvents.fullscreenChangeEvent = _malloc( 280 );
    
        var fullscreenChangeEventhandlerFunc = function(ev) {
          var e = ev || event;
    
          var fullscreenChangeEvent = JSEvents.fullscreenChangeEvent;
    
          __fillFullscreenChangeEventData(fullscreenChangeEvent);
    
          if (dynCall_iiii(callbackfunc, eventTypeId, fullscreenChangeEvent, userData)) e.preventDefault();
        };
    
        var eventHandler = {
          target: target,
          eventTypeString: eventTypeString,
          callbackfunc: callbackfunc,
          handlerFunc: fullscreenChangeEventhandlerFunc,
          useCapture: useCapture
        };
        JSEvents.registerOrRemoveHandler(eventHandler);
      }function _emscripten_set_fullscreenchange_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
        if (!JSEvents.fullscreenEnabled()) return -1;
        target = findEventTarget(target);
        if (!target) return -4;
        __registerFullscreenChangeEventCallback(target, userData, useCapture, callbackfunc, 19, "fullscreenchange", targetThread);
    
    
        // Unprefixed Fullscreen API shipped in Chromium 71 (https://bugs.chromium.org/p/chromium/issues/detail?id=383813)
        // As of Safari 13.0.3 on macOS Catalina 10.15.1 still ships with prefixed webkitfullscreenchange. TODO: revisit this check once Safari ships unprefixed version.
        __registerFullscreenChangeEventCallback(target, userData, useCapture, callbackfunc, 19, "webkitfullscreenchange", targetThread);
    
        return 0;
      }
  
    
    function __registerGamepadEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
        if (!JSEvents.gamepadEvent) JSEvents.gamepadEvent = _malloc( 1432 );
    
        var gamepadEventHandlerFunc = function(ev) {
          var e = ev || event;
    
          var gamepadEvent = JSEvents.gamepadEvent;
          __fillGamepadEventData(gamepadEvent, e["gamepad"]);
    
          if (dynCall_iiii(callbackfunc, eventTypeId, gamepadEvent, userData)) e.preventDefault();
        };
    
        var eventHandler = {
          target: findEventTarget(target),
          allowsDeferredCalls: true,
          eventTypeString: eventTypeString,
          callbackfunc: callbackfunc,
          handlerFunc: gamepadEventHandlerFunc,
          useCapture: useCapture
        };
        JSEvents.registerOrRemoveHandler(eventHandler);
      }function _emscripten_set_gamepadconnected_callback_on_thread(userData, useCapture, callbackfunc, targetThread) {
        if (!navigator.getGamepads && !navigator.webkitGetGamepads) return -1;
        __registerGamepadEventCallback(2, userData, useCapture, callbackfunc, 26, "gamepadconnected", targetThread);
        return 0;
      }
  
    function _emscripten_set_gamepaddisconnected_callback_on_thread(userData, useCapture, callbackfunc, targetThread) {
        if (!navigator.getGamepads && !navigator.webkitGetGamepads) return -1;
        __registerGamepadEventCallback(2, userData, useCapture, callbackfunc, 27, "gamepaddisconnected", targetThread);
        return 0;
      }
  
    
    function __registerKeyEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
        if (!JSEvents.keyEvent) JSEvents.keyEvent = _malloc( 164 );
    
        var keyEventHandlerFunc = function(e) {
    
          var keyEventData = JSEvents.keyEvent;
          var idx = keyEventData >> 2;
    
          HEAP32[idx + 0] = e.location;
          HEAP32[idx + 1] = e.ctrlKey;
          HEAP32[idx + 2] = e.shiftKey;
          HEAP32[idx + 3] = e.altKey;
          HEAP32[idx + 4] = e.metaKey;
          HEAP32[idx + 5] = e.repeat;
          HEAP32[idx + 6] = e.charCode;
          HEAP32[idx + 7] = e.keyCode;
          HEAP32[idx + 8] = e.which;
          stringToUTF8(e.key || '', keyEventData + 36, 32);
          stringToUTF8(e.code || '', keyEventData + 68, 32);
          stringToUTF8(e.char || '', keyEventData + 100, 32);
          stringToUTF8(e.locale || '', keyEventData + 132, 32);
    
          if (dynCall_iiii(callbackfunc, eventTypeId, keyEventData, userData)) e.preventDefault();
        };
    
        var eventHandler = {
          target: findEventTarget(target),
          allowsDeferredCalls: true,
          eventTypeString: eventTypeString,
          callbackfunc: callbackfunc,
          handlerFunc: keyEventHandlerFunc,
          useCapture: useCapture
        };
        JSEvents.registerOrRemoveHandler(eventHandler);
      }function _emscripten_set_keydown_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
        __registerKeyEventCallback(target, userData, useCapture, callbackfunc, 2, "keydown", targetThread);
        return 0;
      }
  
    function _emscripten_set_keypress_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
        __registerKeyEventCallback(target, userData, useCapture, callbackfunc, 1, "keypress", targetThread);
        return 0;
      }
  
    function _emscripten_set_keyup_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
        __registerKeyEventCallback(target, userData, useCapture, callbackfunc, 3, "keyup", targetThread);
        return 0;
      }
  
  
    
    
    function __fillMouseEventData(eventStruct, e, target) {
        var idx = eventStruct >> 2;
        HEAP32[idx + 0] = e.screenX;
        HEAP32[idx + 1] = e.screenY;
        HEAP32[idx + 2] = e.clientX;
        HEAP32[idx + 3] = e.clientY;
        HEAP32[idx + 4] = e.ctrlKey;
        HEAP32[idx + 5] = e.shiftKey;
        HEAP32[idx + 6] = e.altKey;
        HEAP32[idx + 7] = e.metaKey;
        HEAP16[idx*2 + 16] = e.button;
        HEAP16[idx*2 + 17] = e.buttons;
    
        HEAP32[idx + 9] = e["movementX"]
          ;
    
        HEAP32[idx + 10] = e["movementY"]
          ;
    
        var rect = __getBoundingClientRect(target);
        HEAP32[idx + 11] = e.clientX - rect.left;
        HEAP32[idx + 12] = e.clientY - rect.top;
    
      }function __registerMouseEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
        if (!JSEvents.mouseEvent) JSEvents.mouseEvent = _malloc( 64 );
        target = findEventTarget(target);
    
        var mouseEventHandlerFunc = function(ev) {
          var e = ev || event;
    
          // TODO: Make this access thread safe, or this could update live while app is reading it.
          __fillMouseEventData(JSEvents.mouseEvent, e, target);
    
          if (dynCall_iiii(callbackfunc, eventTypeId, JSEvents.mouseEvent, userData)) e.preventDefault();
        };
    
        var eventHandler = {
          target: target,
          allowsDeferredCalls: eventTypeString != 'mousemove' && eventTypeString != 'mouseenter' && eventTypeString != 'mouseleave', // Mouse move events do not allow fullscreen/pointer lock requests to be handled in them!
          eventTypeString: eventTypeString,
          callbackfunc: callbackfunc,
          handlerFunc: mouseEventHandlerFunc,
          useCapture: useCapture
        };
        JSEvents.registerOrRemoveHandler(eventHandler);
      }function _emscripten_set_mousedown_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
        __registerMouseEventCallback(target, userData, useCapture, callbackfunc, 5, "mousedown", targetThread);
        return 0;
      }
  
    function _emscripten_set_mouseenter_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
        __registerMouseEventCallback(target, userData, useCapture, callbackfunc, 33, "mouseenter", targetThread);
        return 0;
      }
  
    function _emscripten_set_mouseleave_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
        __registerMouseEventCallback(target, userData, useCapture, callbackfunc, 34, "mouseleave", targetThread);
        return 0;
      }
  
    function _emscripten_set_mousemove_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
        __registerMouseEventCallback(target, userData, useCapture, callbackfunc, 8, "mousemove", targetThread);
        return 0;
      }
  
    function _emscripten_set_mouseup_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
        __registerMouseEventCallback(target, userData, useCapture, callbackfunc, 6, "mouseup", targetThread);
        return 0;
      }
  
    
    
    function __fillPointerlockChangeEventData(eventStruct) {
        var pointerLockElement = document.pointerLockElement || document.mozPointerLockElement || document.webkitPointerLockElement || document.msPointerLockElement;
        var isPointerlocked = !!pointerLockElement;
        /** @suppress {checkTypes} */
        HEAP32[((eventStruct)>>2)]=isPointerlocked;
        var nodeName = JSEvents.getNodeNameForTarget(pointerLockElement);
        var id = (pointerLockElement && pointerLockElement.id) ? pointerLockElement.id : '';
        stringToUTF8(nodeName, eventStruct + 4, 128);
        stringToUTF8(id, eventStruct + 132, 128);
      }function __registerPointerlockChangeEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
        if (!JSEvents.pointerlockChangeEvent) JSEvents.pointerlockChangeEvent = _malloc( 260 );
    
        var pointerlockChangeEventHandlerFunc = function(ev) {
          var e = ev || event;
    
          var pointerlockChangeEvent = JSEvents.pointerlockChangeEvent;
          __fillPointerlockChangeEventData(pointerlockChangeEvent);
    
          if (dynCall_iiii(callbackfunc, eventTypeId, pointerlockChangeEvent, userData)) e.preventDefault();
        };
    
        var eventHandler = {
          target: target,
          eventTypeString: eventTypeString,
          callbackfunc: callbackfunc,
          handlerFunc: pointerlockChangeEventHandlerFunc,
          useCapture: useCapture
        };
        JSEvents.registerOrRemoveHandler(eventHandler);
      }/** @suppress {missingProperties} */
    function _emscripten_set_pointerlockchange_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
        // TODO: Currently not supported in pthreads or in --proxy-to-worker mode. (In pthreads mode, document object is not defined)
        if (!document || !document.body || (!document.body.requestPointerLock && !document.body.mozRequestPointerLock && !document.body.webkitRequestPointerLock && !document.body.msRequestPointerLock)) {
          return -1;
        }
    
        target = findEventTarget(target);
        if (!target) return -4;
        __registerPointerlockChangeEventCallback(target, userData, useCapture, callbackfunc, 20, "pointerlockchange", targetThread);
        __registerPointerlockChangeEventCallback(target, userData, useCapture, callbackfunc, 20, "mozpointerlockchange", targetThread);
        __registerPointerlockChangeEventCallback(target, userData, useCapture, callbackfunc, 20, "webkitpointerlockchange", targetThread);
        __registerPointerlockChangeEventCallback(target, userData, useCapture, callbackfunc, 20, "mspointerlockchange", targetThread);
        return 0;
      }
  
    
    function __registerUiEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
        if (!JSEvents.uiEvent) JSEvents.uiEvent = _malloc( 36 );
    
        target = findEventTarget(target);
    
        var uiEventHandlerFunc = function(ev) {
          var e = ev || event;
          if (e.target != target) {
            // Never take ui events such as scroll via a 'bubbled' route, but always from the direct element that
            // was targeted. Otherwise e.g. if app logs a message in response to a page scroll, the Emscripten log
            // message box could cause to scroll, generating a new (bubbled) scroll message, causing a new log print,
            // causing a new scroll, etc..
            return;
          }
          var uiEvent = JSEvents.uiEvent;
          var b = document.body; // Take document.body to a variable, Closure compiler does not outline access to it on its own.
          HEAP32[((uiEvent)>>2)]=e.detail;
          HEAP32[(((uiEvent)+(4))>>2)]=b.clientWidth;
          HEAP32[(((uiEvent)+(8))>>2)]=b.clientHeight;
          HEAP32[(((uiEvent)+(12))>>2)]=innerWidth;
          HEAP32[(((uiEvent)+(16))>>2)]=innerHeight;
          HEAP32[(((uiEvent)+(20))>>2)]=outerWidth;
          HEAP32[(((uiEvent)+(24))>>2)]=outerHeight;
          HEAP32[(((uiEvent)+(28))>>2)]=pageXOffset;
          HEAP32[(((uiEvent)+(32))>>2)]=pageYOffset;
          if (dynCall_iiii(callbackfunc, eventTypeId, uiEvent, userData)) e.preventDefault();
        };
    
        var eventHandler = {
          target: target,
          eventTypeString: eventTypeString,
          callbackfunc: callbackfunc,
          handlerFunc: uiEventHandlerFunc,
          useCapture: useCapture
        };
        JSEvents.registerOrRemoveHandler(eventHandler);
      }function _emscripten_set_resize_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
        __registerUiEventCallback(target, userData, useCapture, callbackfunc, 10, "resize", targetThread);
        return 0;
      }
  
    
    function __registerTouchEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
        if (!JSEvents.touchEvent) JSEvents.touchEvent = _malloc( 1684 );
    
        target = findEventTarget(target);
    
        var touchEventHandlerFunc = function(e) {
          var touches = {};
          var et = e.touches;
          for(var i = 0; i < et.length; ++i) {
            var touch = et[i];
            touches[touch.identifier] = touch;
          }
          et = e.changedTouches;
          for(var i = 0; i < et.length; ++i) {
            var touch = et[i];
            touch.isChanged = 1;
            touches[touch.identifier] = touch;
          }
          et = e.targetTouches;
          for(var i = 0; i < et.length; ++i) {
            touches[et[i].identifier].onTarget = 1;
          }
    
          var touchEvent = JSEvents.touchEvent;
          var idx = touchEvent>>2; // Pre-shift the ptr to index to HEAP32 to save code size
          HEAP32[idx + 1] = e.ctrlKey;
          HEAP32[idx + 2] = e.shiftKey;
          HEAP32[idx + 3] = e.altKey;
          HEAP32[idx + 4] = e.metaKey;
          idx += 5; // Advance to the start of the touch array.
          var targetRect = __getBoundingClientRect(target);
          var numTouches = 0;
          for(var i in touches) {
            var t = touches[i];
            HEAP32[idx + 0] = t.identifier;
            HEAP32[idx + 1] = t.screenX;
            HEAP32[idx + 2] = t.screenY;
            HEAP32[idx + 3] = t.clientX;
            HEAP32[idx + 4] = t.clientY;
            HEAP32[idx + 5] = t.pageX;
            HEAP32[idx + 6] = t.pageY;
            HEAP32[idx + 7] = t.isChanged;
            HEAP32[idx + 8] = t.onTarget;
            HEAP32[idx + 9] = t.clientX - targetRect.left;
            HEAP32[idx + 10] = t.clientY - targetRect.top;
    
            idx += 13;
    
            if (++numTouches > 31) {
              break;
            }
          }
          HEAP32[((touchEvent)>>2)]=numTouches;
    
          if (dynCall_iiii(callbackfunc, eventTypeId, touchEvent, userData)) e.preventDefault();
        };
    
        var eventHandler = {
          target: target,
          allowsDeferredCalls: eventTypeString == 'touchstart' || eventTypeString == 'touchend',
          eventTypeString: eventTypeString,
          callbackfunc: callbackfunc,
          handlerFunc: touchEventHandlerFunc,
          useCapture: useCapture
        };
        JSEvents.registerOrRemoveHandler(eventHandler);
      }function _emscripten_set_touchcancel_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
        __registerTouchEventCallback(target, userData, useCapture, callbackfunc, 25, "touchcancel", targetThread);
        return 0;
      }
  
    function _emscripten_set_touchend_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
        __registerTouchEventCallback(target, userData, useCapture, callbackfunc, 23, "touchend", targetThread);
        return 0;
      }
  
    function _emscripten_set_touchmove_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
        __registerTouchEventCallback(target, userData, useCapture, callbackfunc, 24, "touchmove", targetThread);
        return 0;
      }
  
    function _emscripten_set_touchstart_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
        __registerTouchEventCallback(target, userData, useCapture, callbackfunc, 22, "touchstart", targetThread);
        return 0;
      }
  
    
    
    function __fillVisibilityChangeEventData(eventStruct) {
        var visibilityStates = [ "hidden", "visible", "prerender", "unloaded" ];
        var visibilityState = visibilityStates.indexOf(document.visibilityState);
    
        // Assigning a boolean to HEAP32 with expected type coercion.
        /** @suppress {checkTypes} */
        HEAP32[((eventStruct)>>2)]=document.hidden;
        HEAP32[(((eventStruct)+(4))>>2)]=visibilityState;
      }function __registerVisibilityChangeEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
        if (!JSEvents.visibilityChangeEvent) JSEvents.visibilityChangeEvent = _malloc( 8 );
    
        var visibilityChangeEventHandlerFunc = function(ev) {
          var e = ev || event;
    
          var visibilityChangeEvent = JSEvents.visibilityChangeEvent;
    
          __fillVisibilityChangeEventData(visibilityChangeEvent);
    
          if (dynCall_iiii(callbackfunc, eventTypeId, visibilityChangeEvent, userData)) e.preventDefault();
        };
    
        var eventHandler = {
          target: target,
          eventTypeString: eventTypeString,
          callbackfunc: callbackfunc,
          handlerFunc: visibilityChangeEventHandlerFunc,
          useCapture: useCapture
        };
        JSEvents.registerOrRemoveHandler(eventHandler);
      }function _emscripten_set_visibilitychange_callback_on_thread(userData, useCapture, callbackfunc, targetThread) {
      if (!specialHTMLTargets[1]) {
        return -4;
      }
        __registerVisibilityChangeEventCallback(specialHTMLTargets[1], userData, useCapture, callbackfunc, 21, "visibilitychange", targetThread);
        return 0;
      }
  
    
    function __registerWheelEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
        if (!JSEvents.wheelEvent) JSEvents.wheelEvent = _malloc( 96 );
    
        // The DOM Level 3 events spec event 'wheel'
        var wheelHandlerFunc = function(ev) {
          var e = ev || event;
          var wheelEvent = JSEvents.wheelEvent;
          __fillMouseEventData(wheelEvent, e, target);
          HEAPF64[(((wheelEvent)+(64))>>3)]=e["deltaX"];
          HEAPF64[(((wheelEvent)+(72))>>3)]=e["deltaY"];
          HEAPF64[(((wheelEvent)+(80))>>3)]=e["deltaZ"];
          HEAP32[(((wheelEvent)+(88))>>2)]=e["deltaMode"];
          if (dynCall_iiii(callbackfunc, eventTypeId, wheelEvent, userData)) e.preventDefault();
        };
    
        var eventHandler = {
          target: target,
          allowsDeferredCalls: true,
          eventTypeString: eventTypeString,
          callbackfunc: callbackfunc,
          handlerFunc: wheelHandlerFunc,
          useCapture: useCapture
        };
        JSEvents.registerOrRemoveHandler(eventHandler);
      }function _emscripten_set_wheel_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
        target = findEventTarget(target);
        if (typeof target.onwheel !== 'undefined') {
          __registerWheelEventCallback(target, userData, useCapture, callbackfunc, 9, "wheel", targetThread);
          return 0;
        } else {
          return -1;
        }
      }
  
    function _emscripten_sleep() {
        throw 'Please compile your program with async support in order to use asynchronous operations like emscripten_sleep';
      }
  
    
    
    var ENV={};
    
    function getExecutableName() {
        return thisProgram || './this.program';
      }function getEnvStrings() {
        if (!getEnvStrings.strings) {
          // Default values.
          // Browser language detection #8751
          var lang = ((typeof navigator === 'object' && navigator.languages && navigator.languages[0]) || 'C').replace('-', '_') + '.UTF-8';
          var env = {
            'USER': 'web_user',
            'LOGNAME': 'web_user',
            'PATH': '/',
            'PWD': '/',
            'HOME': '/home/web_user',
            'LANG': lang,
            '_': getExecutableName()
          };
          // Apply the user-provided values, if any.
          for (var x in ENV) {
            env[x] = ENV[x];
          }
          var strings = [];
          for (var x in env) {
            strings.push(x + '=' + env[x]);
          }
          getEnvStrings.strings = strings;
        }
        return getEnvStrings.strings;
      }function _environ_get(__environ, environ_buf) {
        var bufSize = 0;
        getEnvStrings().forEach(function(string, i) {
          var ptr = environ_buf + bufSize;
          HEAP32[(((__environ)+(i * 4))>>2)]=ptr;
          writeAsciiToMemory(string, ptr);
          bufSize += string.length + 1;
        });
        return 0;
      }
  
    function _environ_sizes_get(penviron_count, penviron_buf_size) {
        var strings = getEnvStrings();
        HEAP32[((penviron_count)>>2)]=strings.length;
        var bufSize = 0;
        strings.forEach(function(string) {
          bufSize += string.length + 1;
        });
        HEAP32[((penviron_buf_size)>>2)]=bufSize;
        return 0;
      }
  
    function _fd_close(fd) {try {
    
        var stream = SYSCALLS.getStreamFromFD(fd);
        FS.close(stream);
        return 0;
      } catch (e) {
      if (typeof FS === 'undefined' || !(e instanceof FS.ErrnoError)) abort(e);
      return e.errno;
    }
    }
  
    function _fd_read(fd, iov, iovcnt, pnum) {try {
    
        var stream = SYSCALLS.getStreamFromFD(fd);
        var num = SYSCALLS.doReadv(stream, iov, iovcnt);
        HEAP32[((pnum)>>2)]=num
        return 0;
      } catch (e) {
      if (typeof FS === 'undefined' || !(e instanceof FS.ErrnoError)) abort(e);
      return e.errno;
    }
    }
  
    function _fd_seek(fd, offset_low, offset_high, whence, newOffset) {try {
    
        
        var stream = SYSCALLS.getStreamFromFD(fd);
        var HIGH_OFFSET = 0x100000000; // 2^32
        // use an unsigned operator on low and shift high by 32-bits
        var offset = offset_high * HIGH_OFFSET + (offset_low >>> 0);
    
        var DOUBLE_LIMIT = 0x20000000000000; // 2^53
        // we also check for equality since DOUBLE_LIMIT + 1 == DOUBLE_LIMIT
        if (offset <= -DOUBLE_LIMIT || offset >= DOUBLE_LIMIT) {
          return -61;
        }
    
        FS.llseek(stream, offset, whence);
        (tempI64 = [stream.position>>>0,(tempDouble=stream.position,(+(Math_abs(tempDouble))) >= 1.0 ? (tempDouble > 0.0 ? ((Math_min((+(Math_floor((tempDouble)/4294967296.0))), 4294967295.0))|0)>>>0 : (~~((+(Math_ceil((tempDouble - +(((~~(tempDouble)))>>>0))/4294967296.0)))))>>>0) : 0)],HEAP32[((newOffset)>>2)]=tempI64[0],HEAP32[(((newOffset)+(4))>>2)]=tempI64[1]);
        if (stream.getdents && offset === 0 && whence === 0) stream.getdents = null; // reset readdir state
        return 0;
      } catch (e) {
      if (typeof FS === 'undefined' || !(e instanceof FS.ErrnoError)) abort(e);
      return e.errno;
    }
    }
  
    function _fd_write(fd, iov, iovcnt, pnum) {try {
    
        var stream = SYSCALLS.getStreamFromFD(fd);
        var num = SYSCALLS.doWritev(stream, iov, iovcnt);
        HEAP32[((pnum)>>2)]=num
        return 0;
      } catch (e) {
      if (typeof FS === 'undefined' || !(e instanceof FS.ErrnoError)) abort(e);
      return e.errno;
    }
    }
  
    function _gettimeofday(ptr) {
        var now = Date.now();
        HEAP32[((ptr)>>2)]=(now/1000)|0; // seconds
        HEAP32[(((ptr)+(4))>>2)]=((now % 1000)*1000)|0; // microseconds
        return 0;
      }
  
    function _glActiveTexture(x0) { GLctx['activeTexture'](x0) }
  
    function _glAttachShader(program, shader) {
        GLctx.attachShader(GL.programs[program],
                                GL.shaders[shader]);
      }
  
    function _glBindBuffer(target, buffer) {
    
        GLctx.bindBuffer(target, GL.buffers[buffer]);
      }
  
    function _glBindTexture(target, texture) {
        GLctx.bindTexture(target, GL.textures[texture]);
      }
  
    function _glBlendFunc(x0, x1) { GLctx['blendFunc'](x0, x1) }
  
    function _glBufferData(target, size, data, usage) {
    
          // N.b. here first form specifies a heap subarray, second form an integer size, so the ?: code here is polymorphic. It is advised to avoid
          // randomly mixing both uses in calling code, to avoid any potential JS engine JIT issues.
          GLctx.bufferData(target, data ? HEAPU8.subarray(data, data+size) : size, usage);
      }
  
    function _glClear(x0) { GLctx['clear'](x0) }
  
    function _glClearColor(x0, x1, x2, x3) { GLctx['clearColor'](x0, x1, x2, x3) }
  
    function _glCompileShader(shader) {
        GLctx.compileShader(GL.shaders[shader]);
      }
  
    function _glCreateProgram() {
        var id = GL.getNewId(GL.programs);
        var program = GLctx.createProgram();
        program.name = id;
        GL.programs[id] = program;
        return id;
      }
  
    function _glCreateShader(shaderType) {
        var id = GL.getNewId(GL.shaders);
        GL.shaders[id] = GLctx.createShader(shaderType);
        return id;
      }
  
    function _glDeleteShader(id) {
        if (!id) return;
        var shader = GL.shaders[id];
        if (!shader) { // glDeleteShader actually signals an error when deleting a nonexisting object, unlike some other GL delete functions.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
        GLctx.deleteShader(shader);
        GL.shaders[id] = null;
      }
  
    function _glDeleteTextures(n, textures) {
        for (var i = 0; i < n; i++) {
          var id = HEAP32[(((textures)+(i*4))>>2)];
          var texture = GL.textures[id];
          if (!texture) continue; // GL spec: "glDeleteTextures silently ignores 0s and names that do not correspond to existing textures".
          GLctx.deleteTexture(texture);
          texture.name = 0;
          GL.textures[id] = null;
        }
      }
  
    function _glDrawElements(mode, count, type, indices) {
    
        GLctx.drawElements(mode, count, type, indices);
    
      }
  
    function _glEnable(x0) { GLctx['enable'](x0) }
  
    function _glEnableVertexAttribArray(index) {
        GLctx.enableVertexAttribArray(index);
      }
  
    function _glGenBuffers(n, buffers) {
        __glGenObject(n, buffers, 'createBuffer', GL.buffers
          );
      }
  
    function _glGenTextures(n, textures) {
        __glGenObject(n, textures, 'createTexture', GL.textures
          );
      }
  
    function _glGenerateMipmap(x0) { GLctx['generateMipmap'](x0) }
  
    function _glGetAttribLocation(program, name) {
        return GLctx.getAttribLocation(GL.programs[program], UTF8ToString(name));
      }
  
    function _glGetProgramInfoLog(program, maxLength, length, infoLog) {
        var log = GLctx.getProgramInfoLog(GL.programs[program]);
        if (log === null) log = '(unknown error)';
        var numBytesWrittenExclNull = (maxLength > 0 && infoLog) ? stringToUTF8(log, infoLog, maxLength) : 0;
        if (length) HEAP32[((length)>>2)]=numBytesWrittenExclNull;
      }
  
    function _glGetProgramiv(program, pname, p) {
        if (!p) {
          // GLES2 specification does not specify how to behave if p is a null pointer. Since calling this function does not make sense
          // if p == null, issue a GL error to notify user about it.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
    
        if (program >= GL.counter) {
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
    
        var ptable = GL.programInfos[program];
        if (!ptable) {
          GL.recordError(0x502 /* GL_INVALID_OPERATION */);
          return;
        }
    
        if (pname == 0x8B84) { // GL_INFO_LOG_LENGTH
          var log = GLctx.getProgramInfoLog(GL.programs[program]);
          if (log === null) log = '(unknown error)';
          HEAP32[((p)>>2)]=log.length + 1;
        } else if (pname == 0x8B87 /* GL_ACTIVE_UNIFORM_MAX_LENGTH */) {
          HEAP32[((p)>>2)]=ptable.maxUniformLength;
        } else if (pname == 0x8B8A /* GL_ACTIVE_ATTRIBUTE_MAX_LENGTH */) {
          if (ptable.maxAttributeLength == -1) {
            program = GL.programs[program];
            var numAttribs = GLctx.getProgramParameter(program, 0x8B89/*GL_ACTIVE_ATTRIBUTES*/);
            ptable.maxAttributeLength = 0; // Spec says if there are no active attribs, 0 must be returned.
            for (var i = 0; i < numAttribs; ++i) {
              var activeAttrib = GLctx.getActiveAttrib(program, i);
              ptable.maxAttributeLength = Math.max(ptable.maxAttributeLength, activeAttrib.name.length+1);
            }
          }
          HEAP32[((p)>>2)]=ptable.maxAttributeLength;
        } else if (pname == 0x8A35 /* GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH */) {
          if (ptable.maxUniformBlockNameLength == -1) {
            program = GL.programs[program];
            var numBlocks = GLctx.getProgramParameter(program, 0x8A36/*GL_ACTIVE_UNIFORM_BLOCKS*/);
            ptable.maxUniformBlockNameLength = 0;
            for (var i = 0; i < numBlocks; ++i) {
              var activeBlockName = GLctx.getActiveUniformBlockName(program, i);
              ptable.maxUniformBlockNameLength = Math.max(ptable.maxUniformBlockNameLength, activeBlockName.length+1);
            }
          }
          HEAP32[((p)>>2)]=ptable.maxUniformBlockNameLength;
        } else {
          HEAP32[((p)>>2)]=GLctx.getProgramParameter(GL.programs[program], pname);
        }
      }
  
    function _glGetShaderInfoLog(shader, maxLength, length, infoLog) {
        var log = GLctx.getShaderInfoLog(GL.shaders[shader]);
        if (log === null) log = '(unknown error)';
        var numBytesWrittenExclNull = (maxLength > 0 && infoLog) ? stringToUTF8(log, infoLog, maxLength) : 0;
        if (length) HEAP32[((length)>>2)]=numBytesWrittenExclNull;
      }
  
    function _glGetShaderiv(shader, pname, p) {
        if (!p) {
          // GLES2 specification does not specify how to behave if p is a null pointer. Since calling this function does not make sense
          // if p == null, issue a GL error to notify user about it.
          GL.recordError(0x501 /* GL_INVALID_VALUE */);
          return;
        }
        if (pname == 0x8B84) { // GL_INFO_LOG_LENGTH
          var log = GLctx.getShaderInfoLog(GL.shaders[shader]);
          if (log === null) log = '(unknown error)';
          // The GLES2 specification says that if the shader has an empty info log,
          // a value of 0 is returned. Otherwise the log has a null char appended.
          // (An empty string is falsey, so we can just check that instead of
          // looking at log.length.)
          var logLength = log ? log.length + 1 : 0;
          HEAP32[((p)>>2)]=logLength;
        } else if (pname == 0x8B88) { // GL_SHADER_SOURCE_LENGTH
          var source = GLctx.getShaderSource(GL.shaders[shader]);
          // source may be a null, or the empty string, both of which are falsey
          // values that we report a 0 length for.
          var sourceLength = source ? source.length + 1 : 0;
          HEAP32[((p)>>2)]=sourceLength;
        } else {
          HEAP32[((p)>>2)]=GLctx.getShaderParameter(GL.shaders[shader], pname);
        }
      }
  
    function _glGetUniformLocation(program, name) {
        name = UTF8ToString(name);
    
        var arrayIndex = 0;
        // If user passed an array accessor "[index]", parse the array index off the accessor.
        if (name[name.length - 1] == ']') {
          var leftBrace = name.lastIndexOf('[');
          arrayIndex = name[leftBrace+1] != ']' ? jstoi_q(name.slice(leftBrace + 1)) : 0; // "index]", parseInt will ignore the ']' at the end; but treat "foo[]" as "foo[0]"
          name = name.slice(0, leftBrace);
        }
    
        var uniformInfo = GL.programInfos[program] && GL.programInfos[program].uniforms[name]; // returns pair [ dimension_of_uniform_array, uniform_location ]
        if (uniformInfo && arrayIndex >= 0 && arrayIndex < uniformInfo[0]) { // Check if user asked for an out-of-bounds element, i.e. for 'vec4 colors[3];' user could ask for 'colors[10]' which should return -1.
          return uniformInfo[1] + arrayIndex;
        } else {
          return -1;
        }
      }
  
    function _glLinkProgram(program) {
        GLctx.linkProgram(GL.programs[program]);
        GL.populateUniformTable(program);
      }
  
    function _glShaderSource(shader, count, string, length) {
        var source = GL.getSource(shader, count, string, length);
    
    
        GLctx.shaderSource(GL.shaders[shader], source);
      }
  
    function _glTexImage2D(target, level, internalFormat, width, height, border, format, type, pixels) {
        GLctx.texImage2D(target, level, internalFormat, width, height, border, format, type, pixels ? emscriptenWebGLGetTexPixelData(type, format, width, height, pixels, internalFormat) : null);
      }
  
    function _glTexParameteri(x0, x1, x2) { GLctx['texParameteri'](x0, x1, x2) }
  
    function _glUniform2f(location, v0, v1) {
        GLctx.uniform2f(GL.uniforms[location], v0, v1);
      }
  
    function _glUseProgram(program) {
        GLctx.useProgram(GL.programs[program]);
      }
  
    function _glVertexAttribPointer(index, size, type, normalized, stride, ptr) {
        GLctx.vertexAttribPointer(index, size, type, !!normalized, stride, ptr);
      }
  
    
    function _usleep(useconds) {
        // int usleep(useconds_t useconds);
        // http://pubs.opengroup.org/onlinepubs/000095399/functions/usleep.html
        // We're single-threaded, so use a busy loop. Super-ugly.
        var start = _emscripten_get_now();
        while (_emscripten_get_now() - start < useconds / 1000) {
          // Do nothing.
        }
      }function _nanosleep(rqtp, rmtp) {
        // int nanosleep(const struct timespec  *rqtp, struct timespec *rmtp);
        if (rqtp === 0) {
          setErrNo(28);
          return -1;
        }
        var seconds = HEAP32[((rqtp)>>2)];
        var nanoseconds = HEAP32[(((rqtp)+(4))>>2)];
        if (nanoseconds < 0 || nanoseconds > 999999999 || seconds < 0) {
          setErrNo(28);
          return -1;
        }
        if (rmtp !== 0) {
          HEAP32[((rmtp)>>2)]=0;
          HEAP32[(((rmtp)+(4))>>2)]=0;
        }
        return _usleep((seconds * 1e6) + (nanoseconds / 1000));
      }
  
    function _setTempRet0($i) {
        setTempRet0(($i) | 0);
      }
  
    function _sigaction(signum, act, oldact) {
        //int sigaction(int signum, const struct sigaction *act, struct sigaction *oldact);
        return 0;
      }
  
    
    var __sigalrm_handler=0;function _signal(sig, func) {
        if (sig == 14 /*SIGALRM*/) {
          __sigalrm_handler = func;
        } else {
        }
        return 0;
      }
  
    
    
    function __isLeapYear(year) {
          return year%4 === 0 && (year%100 !== 0 || year%400 === 0);
      }
    
    function __arraySum(array, index) {
        var sum = 0;
        for (var i = 0; i <= index; sum += array[i++]) {
          // no-op
        }
        return sum;
      }
    
    
    var __MONTH_DAYS_LEAP=[31,29,31,30,31,30,31,31,30,31,30,31];
    
    var __MONTH_DAYS_REGULAR=[31,28,31,30,31,30,31,31,30,31,30,31];function __addDays(date, days) {
        var newDate = new Date(date.getTime());
        while(days > 0) {
          var leap = __isLeapYear(newDate.getFullYear());
          var currentMonth = newDate.getMonth();
          var daysInCurrentMonth = (leap ? __MONTH_DAYS_LEAP : __MONTH_DAYS_REGULAR)[currentMonth];
    
          if (days > daysInCurrentMonth-newDate.getDate()) {
            // we spill over to next month
            days -= (daysInCurrentMonth-newDate.getDate()+1);
            newDate.setDate(1);
            if (currentMonth < 11) {
              newDate.setMonth(currentMonth+1)
            } else {
              newDate.setMonth(0);
              newDate.setFullYear(newDate.getFullYear()+1);
            }
          } else {
            // we stay in current month
            newDate.setDate(newDate.getDate()+days);
            return newDate;
          }
        }
    
        return newDate;
      }function _strftime(s, maxsize, format, tm) {
        // size_t strftime(char *restrict s, size_t maxsize, const char *restrict format, const struct tm *restrict timeptr);
        // http://pubs.opengroup.org/onlinepubs/009695399/functions/strftime.html
    
        var tm_zone = HEAP32[(((tm)+(40))>>2)];
    
        var date = {
          tm_sec: HEAP32[((tm)>>2)],
          tm_min: HEAP32[(((tm)+(4))>>2)],
          tm_hour: HEAP32[(((tm)+(8))>>2)],
          tm_mday: HEAP32[(((tm)+(12))>>2)],
          tm_mon: HEAP32[(((tm)+(16))>>2)],
          tm_year: HEAP32[(((tm)+(20))>>2)],
          tm_wday: HEAP32[(((tm)+(24))>>2)],
          tm_yday: HEAP32[(((tm)+(28))>>2)],
          tm_isdst: HEAP32[(((tm)+(32))>>2)],
          tm_gmtoff: HEAP32[(((tm)+(36))>>2)],
          tm_zone: tm_zone ? UTF8ToString(tm_zone) : ''
        };
    
        var pattern = UTF8ToString(format);
    
        // expand format
        var EXPANSION_RULES_1 = {
          '%c': '%a %b %d %H:%M:%S %Y',     // Replaced by the locale's appropriate date and time representation - e.g., Mon Aug  3 14:02:01 2013
          '%D': '%m/%d/%y',                 // Equivalent to %m / %d / %y
          '%F': '%Y-%m-%d',                 // Equivalent to %Y - %m - %d
          '%h': '%b',                       // Equivalent to %b
          '%r': '%I:%M:%S %p',              // Replaced by the time in a.m. and p.m. notation
          '%R': '%H:%M',                    // Replaced by the time in 24-hour notation
          '%T': '%H:%M:%S',                 // Replaced by the time
          '%x': '%m/%d/%y',                 // Replaced by the locale's appropriate date representation
          '%X': '%H:%M:%S',                 // Replaced by the locale's appropriate time representation
          // Modified Conversion Specifiers
          '%Ec': '%c',                      // Replaced by the locale's alternative appropriate date and time representation.
          '%EC': '%C',                      // Replaced by the name of the base year (period) in the locale's alternative representation.
          '%Ex': '%m/%d/%y',                // Replaced by the locale's alternative date representation.
          '%EX': '%H:%M:%S',                // Replaced by the locale's alternative time representation.
          '%Ey': '%y',                      // Replaced by the offset from %EC (year only) in the locale's alternative representation.
          '%EY': '%Y',                      // Replaced by the full alternative year representation.
          '%Od': '%d',                      // Replaced by the day of the month, using the locale's alternative numeric symbols, filled as needed with leading zeros if there is any alternative symbol for zero; otherwise, with leading <space> characters.
          '%Oe': '%e',                      // Replaced by the day of the month, using the locale's alternative numeric symbols, filled as needed with leading <space> characters.
          '%OH': '%H',                      // Replaced by the hour (24-hour clock) using the locale's alternative numeric symbols.
          '%OI': '%I',                      // Replaced by the hour (12-hour clock) using the locale's alternative numeric symbols.
          '%Om': '%m',                      // Replaced by the month using the locale's alternative numeric symbols.
          '%OM': '%M',                      // Replaced by the minutes using the locale's alternative numeric symbols.
          '%OS': '%S',                      // Replaced by the seconds using the locale's alternative numeric symbols.
          '%Ou': '%u',                      // Replaced by the weekday as a number in the locale's alternative representation (Monday=1).
          '%OU': '%U',                      // Replaced by the week number of the year (Sunday as the first day of the week, rules corresponding to %U ) using the locale's alternative numeric symbols.
          '%OV': '%V',                      // Replaced by the week number of the year (Monday as the first day of the week, rules corresponding to %V ) using the locale's alternative numeric symbols.
          '%Ow': '%w',                      // Replaced by the number of the weekday (Sunday=0) using the locale's alternative numeric symbols.
          '%OW': '%W',                      // Replaced by the week number of the year (Monday as the first day of the week) using the locale's alternative numeric symbols.
          '%Oy': '%y',                      // Replaced by the year (offset from %C ) using the locale's alternative numeric symbols.
        };
        for (var rule in EXPANSION_RULES_1) {
          pattern = pattern.replace(new RegExp(rule, 'g'), EXPANSION_RULES_1[rule]);
        }
    
        var WEEKDAYS = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
        var MONTHS = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
    
        function leadingSomething(value, digits, character) {
          var str = typeof value === 'number' ? value.toString() : (value || '');
          while (str.length < digits) {
            str = character[0]+str;
          }
          return str;
        }
    
        function leadingNulls(value, digits) {
          return leadingSomething(value, digits, '0');
        }
    
        function compareByDay(date1, date2) {
          function sgn(value) {
            return value < 0 ? -1 : (value > 0 ? 1 : 0);
          }
    
          var compare;
          if ((compare = sgn(date1.getFullYear()-date2.getFullYear())) === 0) {
            if ((compare = sgn(date1.getMonth()-date2.getMonth())) === 0) {
              compare = sgn(date1.getDate()-date2.getDate());
            }
          }
          return compare;
        }
    
        function getFirstWeekStartDate(janFourth) {
            switch (janFourth.getDay()) {
              case 0: // Sunday
                return new Date(janFourth.getFullYear()-1, 11, 29);
              case 1: // Monday
                return janFourth;
              case 2: // Tuesday
                return new Date(janFourth.getFullYear(), 0, 3);
              case 3: // Wednesday
                return new Date(janFourth.getFullYear(), 0, 2);
              case 4: // Thursday
                return new Date(janFourth.getFullYear(), 0, 1);
              case 5: // Friday
                return new Date(janFourth.getFullYear()-1, 11, 31);
              case 6: // Saturday
                return new Date(janFourth.getFullYear()-1, 11, 30);
            }
        }
    
        function getWeekBasedYear(date) {
            var thisDate = __addDays(new Date(date.tm_year+1900, 0, 1), date.tm_yday);
    
            var janFourthThisYear = new Date(thisDate.getFullYear(), 0, 4);
            var janFourthNextYear = new Date(thisDate.getFullYear()+1, 0, 4);
    
            var firstWeekStartThisYear = getFirstWeekStartDate(janFourthThisYear);
            var firstWeekStartNextYear = getFirstWeekStartDate(janFourthNextYear);
    
            if (compareByDay(firstWeekStartThisYear, thisDate) <= 0) {
              // this date is after the start of the first week of this year
              if (compareByDay(firstWeekStartNextYear, thisDate) <= 0) {
                return thisDate.getFullYear()+1;
              } else {
                return thisDate.getFullYear();
              }
            } else {
              return thisDate.getFullYear()-1;
            }
        }
    
        var EXPANSION_RULES_2 = {
          '%a': function(date) {
            return WEEKDAYS[date.tm_wday].substring(0,3);
          },
          '%A': function(date) {
            return WEEKDAYS[date.tm_wday];
          },
          '%b': function(date) {
            return MONTHS[date.tm_mon].substring(0,3);
          },
          '%B': function(date) {
            return MONTHS[date.tm_mon];
          },
          '%C': function(date) {
            var year = date.tm_year+1900;
            return leadingNulls((year/100)|0,2);
          },
          '%d': function(date) {
            return leadingNulls(date.tm_mday, 2);
          },
          '%e': function(date) {
            return leadingSomething(date.tm_mday, 2, ' ');
          },
          '%g': function(date) {
            // %g, %G, and %V give values according to the ISO 8601:2000 standard week-based year.
            // In this system, weeks begin on a Monday and week 1 of the year is the week that includes
            // January 4th, which is also the week that includes the first Thursday of the year, and
            // is also the first week that contains at least four days in the year.
            // If the first Monday of January is the 2nd, 3rd, or 4th, the preceding days are part of
            // the last week of the preceding year; thus, for Saturday 2nd January 1999,
            // %G is replaced by 1998 and %V is replaced by 53. If December 29th, 30th,
            // or 31st is a Monday, it and any following days are part of week 1 of the following year.
            // Thus, for Tuesday 30th December 1997, %G is replaced by 1998 and %V is replaced by 01.
    
            return getWeekBasedYear(date).toString().substring(2);
          },
          '%G': function(date) {
            return getWeekBasedYear(date);
          },
          '%H': function(date) {
            return leadingNulls(date.tm_hour, 2);
          },
          '%I': function(date) {
            var twelveHour = date.tm_hour;
            if (twelveHour == 0) twelveHour = 12;
            else if (twelveHour > 12) twelveHour -= 12;
            return leadingNulls(twelveHour, 2);
          },
          '%j': function(date) {
            // Day of the year (001-366)
            return leadingNulls(date.tm_mday+__arraySum(__isLeapYear(date.tm_year+1900) ? __MONTH_DAYS_LEAP : __MONTH_DAYS_REGULAR, date.tm_mon-1), 3);
          },
          '%m': function(date) {
            return leadingNulls(date.tm_mon+1, 2);
          },
          '%M': function(date) {
            return leadingNulls(date.tm_min, 2);
          },
          '%n': function() {
            return '\n';
          },
          '%p': function(date) {
            if (date.tm_hour >= 0 && date.tm_hour < 12) {
              return 'AM';
            } else {
              return 'PM';
            }
          },
          '%S': function(date) {
            return leadingNulls(date.tm_sec, 2);
          },
          '%t': function() {
            return '\t';
          },
          '%u': function(date) {
            return date.tm_wday || 7;
          },
          '%U': function(date) {
            // Replaced by the week number of the year as a decimal number [00,53].
            // The first Sunday of January is the first day of week 1;
            // days in the new year before this are in week 0. [ tm_year, tm_wday, tm_yday]
            var janFirst = new Date(date.tm_year+1900, 0, 1);
            var firstSunday = janFirst.getDay() === 0 ? janFirst : __addDays(janFirst, 7-janFirst.getDay());
            var endDate = new Date(date.tm_year+1900, date.tm_mon, date.tm_mday);
    
            // is target date after the first Sunday?
            if (compareByDay(firstSunday, endDate) < 0) {
              // calculate difference in days between first Sunday and endDate
              var februaryFirstUntilEndMonth = __arraySum(__isLeapYear(endDate.getFullYear()) ? __MONTH_DAYS_LEAP : __MONTH_DAYS_REGULAR, endDate.getMonth()-1)-31;
              var firstSundayUntilEndJanuary = 31-firstSunday.getDate();
              var days = firstSundayUntilEndJanuary+februaryFirstUntilEndMonth+endDate.getDate();
              return leadingNulls(Math.ceil(days/7), 2);
            }
    
            return compareByDay(firstSunday, janFirst) === 0 ? '01': '00';
          },
          '%V': function(date) {
            // Replaced by the week number of the year (Monday as the first day of the week)
            // as a decimal number [01,53]. If the week containing 1 January has four
            // or more days in the new year, then it is considered week 1.
            // Otherwise, it is the last week of the previous year, and the next week is week 1.
            // Both January 4th and the first Thursday of January are always in week 1. [ tm_year, tm_wday, tm_yday]
            var janFourthThisYear = new Date(date.tm_year+1900, 0, 4);
            var janFourthNextYear = new Date(date.tm_year+1901, 0, 4);
    
            var firstWeekStartThisYear = getFirstWeekStartDate(janFourthThisYear);
            var firstWeekStartNextYear = getFirstWeekStartDate(janFourthNextYear);
    
            var endDate = __addDays(new Date(date.tm_year+1900, 0, 1), date.tm_yday);
    
            if (compareByDay(endDate, firstWeekStartThisYear) < 0) {
              // if given date is before this years first week, then it belongs to the 53rd week of last year
              return '53';
            }
    
            if (compareByDay(firstWeekStartNextYear, endDate) <= 0) {
              // if given date is after next years first week, then it belongs to the 01th week of next year
              return '01';
            }
    
            // given date is in between CW 01..53 of this calendar year
            var daysDifference;
            if (firstWeekStartThisYear.getFullYear() < date.tm_year+1900) {
              // first CW of this year starts last year
              daysDifference = date.tm_yday+32-firstWeekStartThisYear.getDate()
            } else {
              // first CW of this year starts this year
              daysDifference = date.tm_yday+1-firstWeekStartThisYear.getDate();
            }
            return leadingNulls(Math.ceil(daysDifference/7), 2);
          },
          '%w': function(date) {
            return date.tm_wday;
          },
          '%W': function(date) {
            // Replaced by the week number of the year as a decimal number [00,53].
            // The first Monday of January is the first day of week 1;
            // days in the new year before this are in week 0. [ tm_year, tm_wday, tm_yday]
            var janFirst = new Date(date.tm_year, 0, 1);
            var firstMonday = janFirst.getDay() === 1 ? janFirst : __addDays(janFirst, janFirst.getDay() === 0 ? 1 : 7-janFirst.getDay()+1);
            var endDate = new Date(date.tm_year+1900, date.tm_mon, date.tm_mday);
    
            // is target date after the first Monday?
            if (compareByDay(firstMonday, endDate) < 0) {
              var februaryFirstUntilEndMonth = __arraySum(__isLeapYear(endDate.getFullYear()) ? __MONTH_DAYS_LEAP : __MONTH_DAYS_REGULAR, endDate.getMonth()-1)-31;
              var firstMondayUntilEndJanuary = 31-firstMonday.getDate();
              var days = firstMondayUntilEndJanuary+februaryFirstUntilEndMonth+endDate.getDate();
              return leadingNulls(Math.ceil(days/7), 2);
            }
            return compareByDay(firstMonday, janFirst) === 0 ? '01': '00';
          },
          '%y': function(date) {
            // Replaced by the last two digits of the year as a decimal number [00,99]. [ tm_year]
            return (date.tm_year+1900).toString().substring(2);
          },
          '%Y': function(date) {
            // Replaced by the year as a decimal number (for example, 1997). [ tm_year]
            return date.tm_year+1900;
          },
          '%z': function(date) {
            // Replaced by the offset from UTC in the ISO 8601:2000 standard format ( +hhmm or -hhmm ).
            // For example, "-0430" means 4 hours 30 minutes behind UTC (west of Greenwich).
            var off = date.tm_gmtoff;
            var ahead = off >= 0;
            off = Math.abs(off) / 60;
            // convert from minutes into hhmm format (which means 60 minutes = 100 units)
            off = (off / 60)*100 + (off % 60);
            return (ahead ? '+' : '-') + String("0000" + off).slice(-4);
          },
          '%Z': function(date) {
            return date.tm_zone;
          },
          '%%': function() {
            return '%';
          }
        };
        for (var rule in EXPANSION_RULES_2) {
          if (pattern.indexOf(rule) >= 0) {
            pattern = pattern.replace(new RegExp(rule, 'g'), EXPANSION_RULES_2[rule](date));
          }
        }
    
        var bytes = intArrayFromString(pattern, false);
        if (bytes.length > maxsize) {
          return 0;
        }
    
        writeArrayToMemory(bytes, s);
        return bytes.length-1;
      }function _strftime_l(s, maxsize, format, tm) {
        return _strftime(s, maxsize, format, tm); // no locale support yet
      }
  
    
    var readAsmConstArgsArray=[];function readAsmConstArgs(sigPtr, buf) {
        readAsmConstArgsArray.length = 0;
        var ch;
        // Most arguments are i32s, so shift the buffer pointer so it is a plain
        // index into HEAP32.
        buf >>= 2;
        while (ch = HEAPU8[sigPtr++]) {
          // A double takes two 32-bit slots, and must also be aligned - the backend
          // will emit padding to avoid that.
          var double = ch < 105;
          if (double && (buf & 1)) buf++;
          readAsmConstArgsArray.push(double ? HEAPF64[buf++ >> 1] : HEAP32[buf]);
          ++buf;
        }
        return readAsmConstArgsArray;
      }
  var FSNode = /** @constructor */ function(parent, name, mode, rdev) {
      if (!parent) {
        parent = this;  // root node sets parent to itself
      }
      this.parent = parent;
      this.mount = parent.mount;
      this.mounted = null;
      this.id = FS.nextInode++;
      this.name = name;
      this.mode = mode;
      this.node_ops = {};
      this.stream_ops = {};
      this.rdev = rdev;
    };
    var readMode = 292/*292*/ | 73/*73*/;
    var writeMode = 146/*146*/;
    Object.defineProperties(FSNode.prototype, {
     read: {
      get: /** @this{FSNode} */function() {
       return (this.mode & readMode) === readMode;
      },
      set: /** @this{FSNode} */function(val) {
       val ? this.mode |= readMode : this.mode &= ~readMode;
      }
     },
     write: {
      get: /** @this{FSNode} */function() {
       return (this.mode & writeMode) === writeMode;
      },
      set: /** @this{FSNode} */function(val) {
       val ? this.mode |= writeMode : this.mode &= ~writeMode;
      }
     },
     isFolder: {
      get: /** @this{FSNode} */function() {
       return FS.isDir(this.mode);
      }
     },
     isDevice: {
      get: /** @this{FSNode} */function() {
       return FS.isChrdev(this.mode);
      }
     }
    });
    FS.FSNode = FSNode;
    FS.staticInit();;
  Module["requestFullscreen"] = function Module_requestFullscreen(lockPointer, resizeCanvas) { Browser.requestFullscreen(lockPointer, resizeCanvas) };
    Module["requestAnimationFrame"] = function Module_requestAnimationFrame(func) { Browser.requestAnimationFrame(func) };
    Module["setCanvasSize"] = function Module_setCanvasSize(width, height, noUpdates) { Browser.setCanvasSize(width, height, noUpdates) };
    Module["pauseMainLoop"] = function Module_pauseMainLoop() { Browser.mainLoop.pause() };
    Module["resumeMainLoop"] = function Module_resumeMainLoop() { Browser.mainLoop.resume() };
    Module["getUserMedia"] = function Module_getUserMedia() { Browser.getUserMedia() }
    Module["createContext"] = function Module_createContext(canvas, useWebGL, setInModule, webGLContextAttributes) { return Browser.createContext(canvas, useWebGL, setInModule, webGLContextAttributes) };
  var GLctx;;
  for (var i = 0; i < 32; ++i) tempFixedLengthArray.push(new Array(i));;
  var miniTempWebGLFloatBuffersStorage = new Float32Array(288);
    for (/**@suppress{duplicate}*/var i = 0; i < 288; ++i) {
    miniTempWebGLFloatBuffers[i] = miniTempWebGLFloatBuffersStorage.subarray(0, i+1);
    }
    ;
  var __miniTempWebGLIntBuffersStorage = new Int32Array(288);
    for (/**@suppress{duplicate}*/var i = 0; i < 288; ++i) {
    __miniTempWebGLIntBuffers[i] = __miniTempWebGLIntBuffersStorage.subarray(0, i+1);
    }
    ;
  var ASSERTIONS = false;
  
  
  
  /** @type {function(string, boolean=, number=)} */
  function intArrayFromString(stringy, dontAddNull, length) {
    var len = length > 0 ? length : lengthBytesUTF8(stringy)+1;
    var u8array = new Array(len);
    var numBytesWritten = stringToUTF8Array(stringy, u8array, 0, u8array.length);
    if (dontAddNull) u8array.length = numBytesWritten;
    return u8array;
  }
  
  function intArrayToString(array) {
    var ret = [];
    for (var i = 0; i < array.length; i++) {
      var chr = array[i];
      if (chr > 0xFF) {
        if (ASSERTIONS) {
          assert(false, 'Character code ' + chr + ' (' + String.fromCharCode(chr) + ')  at offset ' + i + ' not in 0x00-0xFF.');
        }
        chr &= 0xFF;
      }
      ret.push(String.fromCharCode(chr));
    }
    return ret.join('');
  }
  
  
  var asmGlobalArg = {};
  var asmLibraryArg = { "__assert_fail": ___assert_fail, "__cxa_allocate_exception": ___cxa_allocate_exception, "__cxa_atexit": ___cxa_atexit, "__cxa_throw": ___cxa_throw, "__map_file": ___map_file, "__sys_fcntl64": ___sys_fcntl64, "__sys_ioctl": ___sys_ioctl, "__sys_munmap": ___sys_munmap, "__sys_open": ___sys_open, "abort": _abort, "clock_gettime": _clock_gettime, "dlclose": _dlclose, "eglBindAPI": _eglBindAPI, "eglChooseConfig": _eglChooseConfig, "eglCreateContext": _eglCreateContext, "eglCreateWindowSurface": _eglCreateWindowSurface, "eglDestroyContext": _eglDestroyContext, "eglDestroySurface": _eglDestroySurface, "eglGetConfigAttrib": _eglGetConfigAttrib, "eglGetDisplay": _eglGetDisplay, "eglGetError": _eglGetError, "eglGetProcAddress": _eglGetProcAddress, "eglInitialize": _eglInitialize, "eglMakeCurrent": _eglMakeCurrent, "eglQueryString": _eglQueryString, "eglSwapBuffers": _eglSwapBuffers, "eglSwapInterval": _eglSwapInterval, "eglTerminate": _eglTerminate, "eglWaitGL": _eglWaitGL, "eglWaitNative": _eglWaitNative, "emscripten_asm_const_int": _emscripten_asm_const_int, "emscripten_async_wget": _emscripten_async_wget, "emscripten_async_wget_data": _emscripten_async_wget_data, "emscripten_exit_fullscreen": _emscripten_exit_fullscreen, "emscripten_exit_pointerlock": _emscripten_exit_pointerlock, "emscripten_get_device_pixel_ratio": _emscripten_get_device_pixel_ratio, "emscripten_get_element_css_size": _emscripten_get_element_css_size, "emscripten_get_gamepad_status": _emscripten_get_gamepad_status, "emscripten_get_num_gamepads": _emscripten_get_num_gamepads, "emscripten_get_sbrk_ptr": _emscripten_get_sbrk_ptr, "emscripten_glActiveTexture": _emscripten_glActiveTexture, "emscripten_glAttachShader": _emscripten_glAttachShader, "emscripten_glBeginQueryEXT": _emscripten_glBeginQueryEXT, "emscripten_glBindAttribLocation": _emscripten_glBindAttribLocation, "emscripten_glBindBuffer": _emscripten_glBindBuffer, "emscripten_glBindFramebuffer": _emscripten_glBindFramebuffer, "emscripten_glBindRenderbuffer": _emscripten_glBindRenderbuffer, "emscripten_glBindTexture": _emscripten_glBindTexture, "emscripten_glBindVertexArrayOES": _emscripten_glBindVertexArrayOES, "emscripten_glBlendColor": _emscripten_glBlendColor, "emscripten_glBlendEquation": _emscripten_glBlendEquation, "emscripten_glBlendEquationSeparate": _emscripten_glBlendEquationSeparate, "emscripten_glBlendFunc": _emscripten_glBlendFunc, "emscripten_glBlendFuncSeparate": _emscripten_glBlendFuncSeparate, "emscripten_glBufferData": _emscripten_glBufferData, "emscripten_glBufferSubData": _emscripten_glBufferSubData, "emscripten_glCheckFramebufferStatus": _emscripten_glCheckFramebufferStatus, "emscripten_glClear": _emscripten_glClear, "emscripten_glClearColor": _emscripten_glClearColor, "emscripten_glClearDepthf": _emscripten_glClearDepthf, "emscripten_glClearStencil": _emscripten_glClearStencil, "emscripten_glColorMask": _emscripten_glColorMask, "emscripten_glCompileShader": _emscripten_glCompileShader, "emscripten_glCompressedTexImage2D": _emscripten_glCompressedTexImage2D, "emscripten_glCompressedTexSubImage2D": _emscripten_glCompressedTexSubImage2D, "emscripten_glCopyTexImage2D": _emscripten_glCopyTexImage2D, "emscripten_glCopyTexSubImage2D": _emscripten_glCopyTexSubImage2D, "emscripten_glCreateProgram": _emscripten_glCreateProgram, "emscripten_glCreateShader": _emscripten_glCreateShader, "emscripten_glCullFace": _emscripten_glCullFace, "emscripten_glDeleteBuffers": _emscripten_glDeleteBuffers, "emscripten_glDeleteFramebuffers": _emscripten_glDeleteFramebuffers, "emscripten_glDeleteProgram": _emscripten_glDeleteProgram, "emscripten_glDeleteQueriesEXT": _emscripten_glDeleteQueriesEXT, "emscripten_glDeleteRenderbuffers": _emscripten_glDeleteRenderbuffers, "emscripten_glDeleteShader": _emscripten_glDeleteShader, "emscripten_glDeleteTextures": _emscripten_glDeleteTextures, "emscripten_glDeleteVertexArraysOES": _emscripten_glDeleteVertexArraysOES, "emscripten_glDepthFunc": _emscripten_glDepthFunc, "emscripten_glDepthMask": _emscripten_glDepthMask, "emscripten_glDepthRangef": _emscripten_glDepthRangef, "emscripten_glDetachShader": _emscripten_glDetachShader, "emscripten_glDisable": _emscripten_glDisable, "emscripten_glDisableVertexAttribArray": _emscripten_glDisableVertexAttribArray, "emscripten_glDrawArrays": _emscripten_glDrawArrays, "emscripten_glDrawArraysInstancedANGLE": _emscripten_glDrawArraysInstancedANGLE, "emscripten_glDrawBuffersWEBGL": _emscripten_glDrawBuffersWEBGL, "emscripten_glDrawElements": _emscripten_glDrawElements, "emscripten_glDrawElementsInstancedANGLE": _emscripten_glDrawElementsInstancedANGLE, "emscripten_glEnable": _emscripten_glEnable, "emscripten_glEnableVertexAttribArray": _emscripten_glEnableVertexAttribArray, "emscripten_glEndQueryEXT": _emscripten_glEndQueryEXT, "emscripten_glFinish": _emscripten_glFinish, "emscripten_glFlush": _emscripten_glFlush, "emscripten_glFramebufferRenderbuffer": _emscripten_glFramebufferRenderbuffer, "emscripten_glFramebufferTexture2D": _emscripten_glFramebufferTexture2D, "emscripten_glFrontFace": _emscripten_glFrontFace, "emscripten_glGenBuffers": _emscripten_glGenBuffers, "emscripten_glGenFramebuffers": _emscripten_glGenFramebuffers, "emscripten_glGenQueriesEXT": _emscripten_glGenQueriesEXT, "emscripten_glGenRenderbuffers": _emscripten_glGenRenderbuffers, "emscripten_glGenTextures": _emscripten_glGenTextures, "emscripten_glGenVertexArraysOES": _emscripten_glGenVertexArraysOES, "emscripten_glGenerateMipmap": _emscripten_glGenerateMipmap, "emscripten_glGetActiveAttrib": _emscripten_glGetActiveAttrib, "emscripten_glGetActiveUniform": _emscripten_glGetActiveUniform, "emscripten_glGetAttachedShaders": _emscripten_glGetAttachedShaders, "emscripten_glGetAttribLocation": _emscripten_glGetAttribLocation, "emscripten_glGetBooleanv": _emscripten_glGetBooleanv, "emscripten_glGetBufferParameteriv": _emscripten_glGetBufferParameteriv, "emscripten_glGetError": _emscripten_glGetError, "emscripten_glGetFloatv": _emscripten_glGetFloatv, "emscripten_glGetFramebufferAttachmentParameteriv": _emscripten_glGetFramebufferAttachmentParameteriv, "emscripten_glGetIntegerv": _emscripten_glGetIntegerv, "emscripten_glGetProgramInfoLog": _emscripten_glGetProgramInfoLog, "emscripten_glGetProgramiv": _emscripten_glGetProgramiv, "emscripten_glGetQueryObjecti64vEXT": _emscripten_glGetQueryObjecti64vEXT, "emscripten_glGetQueryObjectivEXT": _emscripten_glGetQueryObjectivEXT, "emscripten_glGetQueryObjectui64vEXT": _emscripten_glGetQueryObjectui64vEXT, "emscripten_glGetQueryObjectuivEXT": _emscripten_glGetQueryObjectuivEXT, "emscripten_glGetQueryivEXT": _emscripten_glGetQueryivEXT, "emscripten_glGetRenderbufferParameteriv": _emscripten_glGetRenderbufferParameteriv, "emscripten_glGetShaderInfoLog": _emscripten_glGetShaderInfoLog, "emscripten_glGetShaderPrecisionFormat": _emscripten_glGetShaderPrecisionFormat, "emscripten_glGetShaderSource": _emscripten_glGetShaderSource, "emscripten_glGetShaderiv": _emscripten_glGetShaderiv, "emscripten_glGetString": _emscripten_glGetString, "emscripten_glGetTexParameterfv": _emscripten_glGetTexParameterfv, "emscripten_glGetTexParameteriv": _emscripten_glGetTexParameteriv, "emscripten_glGetUniformLocation": _emscripten_glGetUniformLocation, "emscripten_glGetUniformfv": _emscripten_glGetUniformfv, "emscripten_glGetUniformiv": _emscripten_glGetUniformiv, "emscripten_glGetVertexAttribPointerv": _emscripten_glGetVertexAttribPointerv, "emscripten_glGetVertexAttribfv": _emscripten_glGetVertexAttribfv, "emscripten_glGetVertexAttribiv": _emscripten_glGetVertexAttribiv, "emscripten_glHint": _emscripten_glHint, "emscripten_glIsBuffer": _emscripten_glIsBuffer, "emscripten_glIsEnabled": _emscripten_glIsEnabled, "emscripten_glIsFramebuffer": _emscripten_glIsFramebuffer, "emscripten_glIsProgram": _emscripten_glIsProgram, "emscripten_glIsQueryEXT": _emscripten_glIsQueryEXT, "emscripten_glIsRenderbuffer": _emscripten_glIsRenderbuffer, "emscripten_glIsShader": _emscripten_glIsShader, "emscripten_glIsTexture": _emscripten_glIsTexture, "emscripten_glIsVertexArrayOES": _emscripten_glIsVertexArrayOES, "emscripten_glLineWidth": _emscripten_glLineWidth, "emscripten_glLinkProgram": _emscripten_glLinkProgram, "emscripten_glPixelStorei": _emscripten_glPixelStorei, "emscripten_glPolygonOffset": _emscripten_glPolygonOffset, "emscripten_glQueryCounterEXT": _emscripten_glQueryCounterEXT, "emscripten_glReadPixels": _emscripten_glReadPixels, "emscripten_glReleaseShaderCompiler": _emscripten_glReleaseShaderCompiler, "emscripten_glRenderbufferStorage": _emscripten_glRenderbufferStorage, "emscripten_glSampleCoverage": _emscripten_glSampleCoverage, "emscripten_glScissor": _emscripten_glScissor, "emscripten_glShaderBinary": _emscripten_glShaderBinary, "emscripten_glShaderSource": _emscripten_glShaderSource, "emscripten_glStencilFunc": _emscripten_glStencilFunc, "emscripten_glStencilFuncSeparate": _emscripten_glStencilFuncSeparate, "emscripten_glStencilMask": _emscripten_glStencilMask, "emscripten_glStencilMaskSeparate": _emscripten_glStencilMaskSeparate, "emscripten_glStencilOp": _emscripten_glStencilOp, "emscripten_glStencilOpSeparate": _emscripten_glStencilOpSeparate, "emscripten_glTexImage2D": _emscripten_glTexImage2D, "emscripten_glTexParameterf": _emscripten_glTexParameterf, "emscripten_glTexParameterfv": _emscripten_glTexParameterfv, "emscripten_glTexParameteri": _emscripten_glTexParameteri, "emscripten_glTexParameteriv": _emscripten_glTexParameteriv, "emscripten_glTexSubImage2D": _emscripten_glTexSubImage2D, "emscripten_glUniform1f": _emscripten_glUniform1f, "emscripten_glUniform1fv": _emscripten_glUniform1fv, "emscripten_glUniform1i": _emscripten_glUniform1i, "emscripten_glUniform1iv": _emscripten_glUniform1iv, "emscripten_glUniform2f": _emscripten_glUniform2f, "emscripten_glUniform2fv": _emscripten_glUniform2fv, "emscripten_glUniform2i": _emscripten_glUniform2i, "emscripten_glUniform2iv": _emscripten_glUniform2iv, "emscripten_glUniform3f": _emscripten_glUniform3f, "emscripten_glUniform3fv": _emscripten_glUniform3fv, "emscripten_glUniform3i": _emscripten_glUniform3i, "emscripten_glUniform3iv": _emscripten_glUniform3iv, "emscripten_glUniform4f": _emscripten_glUniform4f, "emscripten_glUniform4fv": _emscripten_glUniform4fv, "emscripten_glUniform4i": _emscripten_glUniform4i, "emscripten_glUniform4iv": _emscripten_glUniform4iv, "emscripten_glUniformMatrix2fv": _emscripten_glUniformMatrix2fv, "emscripten_glUniformMatrix3fv": _emscripten_glUniformMatrix3fv, "emscripten_glUniformMatrix4fv": _emscripten_glUniformMatrix4fv, "emscripten_glUseProgram": _emscripten_glUseProgram, "emscripten_glValidateProgram": _emscripten_glValidateProgram, "emscripten_glVertexAttrib1f": _emscripten_glVertexAttrib1f, "emscripten_glVertexAttrib1fv": _emscripten_glVertexAttrib1fv, "emscripten_glVertexAttrib2f": _emscripten_glVertexAttrib2f, "emscripten_glVertexAttrib2fv": _emscripten_glVertexAttrib2fv, "emscripten_glVertexAttrib3f": _emscripten_glVertexAttrib3f, "emscripten_glVertexAttrib3fv": _emscripten_glVertexAttrib3fv, "emscripten_glVertexAttrib4f": _emscripten_glVertexAttrib4f, "emscripten_glVertexAttrib4fv": _emscripten_glVertexAttrib4fv, "emscripten_glVertexAttribDivisorANGLE": _emscripten_glVertexAttribDivisorANGLE, "emscripten_glVertexAttribPointer": _emscripten_glVertexAttribPointer, "emscripten_glViewport": _emscripten_glViewport, "emscripten_has_asyncify": _emscripten_has_asyncify, "emscripten_memcpy_big": _emscripten_memcpy_big, "emscripten_request_fullscreen_strategy": _emscripten_request_fullscreen_strategy, "emscripten_request_pointerlock": _emscripten_request_pointerlock, "emscripten_resize_heap": _emscripten_resize_heap, "emscripten_sample_gamepad_data": _emscripten_sample_gamepad_data, "emscripten_set_beforeunload_callback_on_thread": _emscripten_set_beforeunload_callback_on_thread, "emscripten_set_blur_callback_on_thread": _emscripten_set_blur_callback_on_thread, "emscripten_set_canvas_element_size": _emscripten_set_canvas_element_size, "emscripten_set_element_css_size": _emscripten_set_element_css_size, "emscripten_set_focus_callback_on_thread": _emscripten_set_focus_callback_on_thread, "emscripten_set_fullscreenchange_callback_on_thread": _emscripten_set_fullscreenchange_callback_on_thread, "emscripten_set_gamepadconnected_callback_on_thread": _emscripten_set_gamepadconnected_callback_on_thread, "emscripten_set_gamepaddisconnected_callback_on_thread": _emscripten_set_gamepaddisconnected_callback_on_thread, "emscripten_set_keydown_callback_on_thread": _emscripten_set_keydown_callback_on_thread, "emscripten_set_keypress_callback_on_thread": _emscripten_set_keypress_callback_on_thread, "emscripten_set_keyup_callback_on_thread": _emscripten_set_keyup_callback_on_thread, "emscripten_set_main_loop": _emscripten_set_main_loop, "emscripten_set_mousedown_callback_on_thread": _emscripten_set_mousedown_callback_on_thread, "emscripten_set_mouseenter_callback_on_thread": _emscripten_set_mouseenter_callback_on_thread, "emscripten_set_mouseleave_callback_on_thread": _emscripten_set_mouseleave_callback_on_thread, "emscripten_set_mousemove_callback_on_thread": _emscripten_set_mousemove_callback_on_thread, "emscripten_set_mouseup_callback_on_thread": _emscripten_set_mouseup_callback_on_thread, "emscripten_set_pointerlockchange_callback_on_thread": _emscripten_set_pointerlockchange_callback_on_thread, "emscripten_set_resize_callback_on_thread": _emscripten_set_resize_callback_on_thread, "emscripten_set_touchcancel_callback_on_thread": _emscripten_set_touchcancel_callback_on_thread, "emscripten_set_touchend_callback_on_thread": _emscripten_set_touchend_callback_on_thread, "emscripten_set_touchmove_callback_on_thread": _emscripten_set_touchmove_callback_on_thread, "emscripten_set_touchstart_callback_on_thread": _emscripten_set_touchstart_callback_on_thread, "emscripten_set_visibilitychange_callback_on_thread": _emscripten_set_visibilitychange_callback_on_thread, "emscripten_set_wheel_callback_on_thread": _emscripten_set_wheel_callback_on_thread, "emscripten_sleep": _emscripten_sleep, "environ_get": _environ_get, "environ_sizes_get": _environ_sizes_get, "fd_close": _fd_close, "fd_read": _fd_read, "fd_seek": _fd_seek, "fd_write": _fd_write, "gettimeofday": _gettimeofday, "glActiveTexture": _glActiveTexture, "glAttachShader": _glAttachShader, "glBindBuffer": _glBindBuffer, "glBindTexture": _glBindTexture, "glBlendFunc": _glBlendFunc, "glBufferData": _glBufferData, "glClear": _glClear, "glClearColor": _glClearColor, "glCompileShader": _glCompileShader, "glCreateProgram": _glCreateProgram, "glCreateShader": _glCreateShader, "glDeleteShader": _glDeleteShader, "glDeleteTextures": _glDeleteTextures, "glDrawElements": _glDrawElements, "glEnable": _glEnable, "glEnableVertexAttribArray": _glEnableVertexAttribArray, "glGenBuffers": _glGenBuffers, "glGenTextures": _glGenTextures, "glGenerateMipmap": _glGenerateMipmap, "glGetAttribLocation": _glGetAttribLocation, "glGetProgramInfoLog": _glGetProgramInfoLog, "glGetProgramiv": _glGetProgramiv, "glGetShaderInfoLog": _glGetShaderInfoLog, "glGetShaderiv": _glGetShaderiv, "glGetUniformLocation": _glGetUniformLocation, "glLinkProgram": _glLinkProgram, "glShaderSource": _glShaderSource, "glTexImage2D": _glTexImage2D, "glTexParameteri": _glTexParameteri, "glUniform2f": _glUniform2f, "glUseProgram": _glUseProgram, "glVertexAttribPointer": _glVertexAttribPointer, "memory": wasmMemory, "nanosleep": _nanosleep, "setTempRet0": _setTempRet0, "sigaction": _sigaction, "signal": _signal, "strftime_l": _strftime_l, "table": wasmTable };
  var asm = createWasm();
  /** @type {function(...*):?} */
  var ___wasm_call_ctors = Module["___wasm_call_ctors"] = function() {
    return (___wasm_call_ctors = Module["___wasm_call_ctors"] = Module["asm"]["__wasm_call_ctors"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var _memcpy = Module["_memcpy"] = function() {
    return (_memcpy = Module["_memcpy"] = Module["asm"]["memcpy"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var _memset = Module["_memset"] = function() {
    return (_memset = Module["_memset"] = Module["asm"]["memset"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var _main = Module["_main"] = function() {
    return (_main = Module["_main"] = Module["asm"]["main"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var _free = Module["_free"] = function() {
    return (_free = Module["_free"] = Module["asm"]["free"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var _malloc = Module["_malloc"] = function() {
    return (_malloc = Module["_malloc"] = Module["asm"]["malloc"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var _strstr = Module["_strstr"] = function() {
    return (_strstr = Module["_strstr"] = Module["asm"]["strstr"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var ___errno_location = Module["___errno_location"] = function() {
    return (___errno_location = Module["___errno_location"] = Module["asm"]["__errno_location"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var _emscripten_GetProcAddress = Module["_emscripten_GetProcAddress"] = function() {
    return (_emscripten_GetProcAddress = Module["_emscripten_GetProcAddress"] = Module["asm"]["emscripten_GetProcAddress"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var _setThrew = Module["_setThrew"] = function() {
    return (_setThrew = Module["_setThrew"] = Module["asm"]["setThrew"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var stackSave = Module["stackSave"] = function() {
    return (stackSave = Module["stackSave"] = Module["asm"]["stackSave"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var stackRestore = Module["stackRestore"] = function() {
    return (stackRestore = Module["stackRestore"] = Module["asm"]["stackRestore"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var stackAlloc = Module["stackAlloc"] = function() {
    return (stackAlloc = Module["stackAlloc"] = Module["asm"]["stackAlloc"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_vi = Module["dynCall_vi"] = function() {
    return (dynCall_vi = Module["dynCall_vi"] = Module["asm"]["dynCall_vi"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_ii = Module["dynCall_ii"] = function() {
    return (dynCall_ii = Module["dynCall_ii"] = Module["asm"]["dynCall_ii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_vii = Module["dynCall_vii"] = function() {
    return (dynCall_vii = Module["dynCall_vii"] = Module["asm"]["dynCall_vii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_viii = Module["dynCall_viii"] = function() {
    return (dynCall_viii = Module["dynCall_viii"] = Module["asm"]["dynCall_viii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_iii = Module["dynCall_iii"] = function() {
    return (dynCall_iii = Module["dynCall_iii"] = Module["asm"]["dynCall_iii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_viiii = Module["dynCall_viiii"] = function() {
    return (dynCall_viiii = Module["dynCall_viiii"] = Module["asm"]["dynCall_viiii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_v = Module["dynCall_v"] = function() {
    return (dynCall_v = Module["dynCall_v"] = Module["asm"]["dynCall_v"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_iiiiii = Module["dynCall_iiiiii"] = function() {
    return (dynCall_iiiiii = Module["dynCall_iiiiii"] = Module["asm"]["dynCall_iiiiii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_viiiiii = Module["dynCall_viiiiii"] = function() {
    return (dynCall_viiiiii = Module["dynCall_viiiiii"] = Module["asm"]["dynCall_viiiiii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_iiiii = Module["dynCall_iiiii"] = function() {
    return (dynCall_iiiii = Module["dynCall_iiiii"] = Module["asm"]["dynCall_iiiii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_iiii = Module["dynCall_iiii"] = function() {
    return (dynCall_iiii = Module["dynCall_iiii"] = Module["asm"]["dynCall_iiii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_jiji = Module["dynCall_jiji"] = function() {
    return (dynCall_jiji = Module["dynCall_jiji"] = Module["asm"]["dynCall_jiji"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_ji = Module["dynCall_ji"] = function() {
    return (dynCall_ji = Module["dynCall_ji"] = Module["asm"]["dynCall_ji"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_iiiiiiiiii = Module["dynCall_iiiiiiiiii"] = function() {
    return (dynCall_iiiiiiiiii = Module["dynCall_iiiiiiiiii"] = Module["asm"]["dynCall_iiiiiiiiii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_iiiiiidii = Module["dynCall_iiiiiidii"] = function() {
    return (dynCall_iiiiiidii = Module["dynCall_iiiiiidii"] = Module["asm"]["dynCall_iiiiiidii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_iiiiiiiii = Module["dynCall_iiiiiiiii"] = function() {
    return (dynCall_iiiiiiiii = Module["dynCall_iiiiiiiii"] = Module["asm"]["dynCall_iiiiiiiii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_viiiiiii = Module["dynCall_viiiiiii"] = function() {
    return (dynCall_viiiiiii = Module["dynCall_viiiiiii"] = Module["asm"]["dynCall_viiiiiii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_viiiiiiiiiii = Module["dynCall_viiiiiiiiiii"] = function() {
    return (dynCall_viiiiiiiiiii = Module["dynCall_viiiiiiiiiii"] = Module["asm"]["dynCall_viiiiiiiiiii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_iiiiiiii = Module["dynCall_iiiiiiii"] = function() {
    return (dynCall_iiiiiiii = Module["dynCall_iiiiiiii"] = Module["asm"]["dynCall_iiiiiiii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_i = Module["dynCall_i"] = function() {
    return (dynCall_i = Module["dynCall_i"] = Module["asm"]["dynCall_i"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_iidiiii = Module["dynCall_iidiiii"] = function() {
    return (dynCall_iidiiii = Module["dynCall_iidiiii"] = Module["asm"]["dynCall_iidiiii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_viijii = Module["dynCall_viijii"] = function() {
    return (dynCall_viijii = Module["dynCall_viijii"] = Module["asm"]["dynCall_viijii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_iiiiiii = Module["dynCall_iiiiiii"] = function() {
    return (dynCall_iiiiiii = Module["dynCall_iiiiiii"] = Module["asm"]["dynCall_iiiiiii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_iiiiij = Module["dynCall_iiiiij"] = function() {
    return (dynCall_iiiiij = Module["dynCall_iiiiij"] = Module["asm"]["dynCall_iiiiij"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_iiiiid = Module["dynCall_iiiiid"] = function() {
    return (dynCall_iiiiid = Module["dynCall_iiiiid"] = Module["asm"]["dynCall_iiiiid"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_iiiiijj = Module["dynCall_iiiiijj"] = function() {
    return (dynCall_iiiiijj = Module["dynCall_iiiiijj"] = Module["asm"]["dynCall_iiiiijj"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_iiiiiijj = Module["dynCall_iiiiiijj"] = function() {
    return (dynCall_iiiiiijj = Module["dynCall_iiiiiijj"] = Module["asm"]["dynCall_iiiiiijj"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_viiiii = Module["dynCall_viiiii"] = function() {
    return (dynCall_viiiii = Module["dynCall_viiiii"] = Module["asm"]["dynCall_viiiii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_vffff = Module["dynCall_vffff"] = function() {
    return (dynCall_vffff = Module["dynCall_vffff"] = Module["asm"]["dynCall_vffff"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_vf = Module["dynCall_vf"] = function() {
    return (dynCall_vf = Module["dynCall_vf"] = Module["asm"]["dynCall_vf"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_viiiiiiii = Module["dynCall_viiiiiiii"] = function() {
    return (dynCall_viiiiiiii = Module["dynCall_viiiiiiii"] = Module["asm"]["dynCall_viiiiiiii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_viiiiiiiii = Module["dynCall_viiiiiiiii"] = function() {
    return (dynCall_viiiiiiiii = Module["dynCall_viiiiiiiii"] = Module["asm"]["dynCall_viiiiiiiii"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_vff = Module["dynCall_vff"] = function() {
    return (dynCall_vff = Module["dynCall_vff"] = Module["asm"]["dynCall_vff"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_vfi = Module["dynCall_vfi"] = function() {
    return (dynCall_vfi = Module["dynCall_vfi"] = Module["asm"]["dynCall_vfi"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_viif = Module["dynCall_viif"] = function() {
    return (dynCall_viif = Module["dynCall_viif"] = Module["asm"]["dynCall_viif"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_vif = Module["dynCall_vif"] = function() {
    return (dynCall_vif = Module["dynCall_vif"] = Module["asm"]["dynCall_vif"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_viff = Module["dynCall_viff"] = function() {
    return (dynCall_viff = Module["dynCall_viff"] = Module["asm"]["dynCall_viff"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_vifff = Module["dynCall_vifff"] = function() {
    return (dynCall_vifff = Module["dynCall_vifff"] = Module["asm"]["dynCall_vifff"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var dynCall_viffff = Module["dynCall_viffff"] = function() {
    return (dynCall_viffff = Module["dynCall_viffff"] = Module["asm"]["dynCall_viffff"]).apply(null, arguments);
  };
  
  /** @type {function(...*):?} */
  var __growWasmMemory = Module["__growWasmMemory"] = function() {
    return (__growWasmMemory = Module["__growWasmMemory"] = Module["asm"]["__growWasmMemory"]).apply(null, arguments);
  };
  
  
  
  
  
  // === Auto-generated postamble setup entry stuff ===
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  var calledRun;
  
  /**
   * @constructor
   * @this {ExitStatus}
   */
  function ExitStatus(status) {
    this.name = "ExitStatus";
    this.message = "Program terminated with exit(" + status + ")";
    this.status = status;
  }
  
  var calledMain = false;
  
  
  dependenciesFulfilled = function runCaller() {
    // If run has never been called, and we should call run (INVOKE_RUN is true, and Module.noInitialRun is not false)
    if (!calledRun) run();
    if (!calledRun) dependenciesFulfilled = runCaller; // try this again later, after new deps are fulfilled
  };
  
  function callMain(args) {
  
    var entryFunction = Module['_main'];
  
  
    var argc = 0;
    var argv = 0;
  
    try {
  
  
      var ret = entryFunction(argc, argv);
  
  
      // In PROXY_TO_PTHREAD builds, we should never exit the runtime below, as execution is asynchronously handed
      // off to a pthread.
      // if we're not running an evented main loop, it's time to exit
        exit(ret, /* implicit = */ true);
    }
    catch(e) {
      if (e instanceof ExitStatus) {
        // exit() throws this once it's done to make sure execution
        // has been stopped completely
        return;
      } else if (e == 'unwind') {
        // running an evented main loop, don't immediately exit
        noExitRuntime = true;
        return;
      } else {
        var toLog = e;
        if (e && typeof e === 'object' && e.stack) {
          toLog = [e, e.stack];
        }
        err('exception thrown: ' + toLog);
        quit_(1, e);
      }
    } finally {
      calledMain = true;
    }
  }
  
  
  
  
  /** @type {function(Array=)} */
  function run(args) {
    args = args || arguments_;
  
    if (runDependencies > 0) {
      return;
    }
  
  
    preRun();
  
    if (runDependencies > 0) return; // a preRun added a dependency, run will be called later
  
    function doRun() {
      // run may have just been called through dependencies being fulfilled just in this very frame,
      // or while the async setStatus time below was happening
      if (calledRun) return;
      calledRun = true;
      Module['calledRun'] = true;
  
      if (ABORT) return;
  
      initRuntime();
  
      preMain();
  
      if (Module['onRuntimeInitialized']) Module['onRuntimeInitialized']();
  
      if (shouldRunNow) callMain(args);
  
      postRun();
    }
  
    if (Module['setStatus']) {
      Module['setStatus']('Running...');
      setTimeout(function() {
        setTimeout(function() {
          Module['setStatus']('');
        }, 1);
        doRun();
      }, 1);
    } else
    {
      doRun();
    }
  }
  Module['run'] = run;
  
  
  /** @param {boolean|number=} implicit */
  function exit(status, implicit) {
  
    // if this is just main exit-ing implicitly, and the status is 0, then we
    // don't need to do anything here and can just leave. if the status is
    // non-zero, though, then we need to report it.
    // (we may have warned about this earlier, if a situation justifies doing so)
    if (implicit && noExitRuntime && status === 0) {
      return;
    }
  
    if (noExitRuntime) {
    } else {
  
      ABORT = true;
      EXITSTATUS = status;
  
      exitRuntime();
  
      if (Module['onExit']) Module['onExit'](status);
    }
  
    quit_(status, new ExitStatus(status));
  }
  
  if (Module['preInit']) {
    if (typeof Module['preInit'] == 'function') Module['preInit'] = [Module['preInit']];
    while (Module['preInit'].length > 0) {
      Module['preInit'].pop()();
    }
  }
  
  // shouldRunNow refers to calling main(), not run().
  var shouldRunNow = true;
  
  if (Module['noInitialRun']) shouldRunNow = false;
  
  
    noExitRuntime = true;
  
  run();
  
  
  
  
  
  
  // {{MODULE_ADDITIONS}}
  
  
  
  