{
  "version": 3,
  "sources": ["../../worker-utils/src/lib/env-utils/version.ts", "../../worker-utils/src/lib/env-utils/assert.ts", "../../worker-utils/src/lib/env-utils/globals.ts", "../../worker-utils/src/lib/node/worker_threads-browser.ts", "../../worker-utils/src/lib/worker-utils/get-transfer-list.ts", "../../worker-utils/src/lib/worker-farm/worker-body.ts", "../../worker-utils/src/lib/library-utils/library-utils.ts", "../src/lib/draco-builder.ts", "../src/lib/draco-module-loader.ts", "../src/lib/utils/version.ts", "../src/draco-writer.ts", "../src/workers/draco-writer-worker.ts"],
  "sourcesContent": ["// loaders.gl\n// SPDX-License-Identifier: MIT\n// Copyright (c) vis.gl contributors\n\n// Version constant cannot be imported, it needs to correspond to the build version of **this** module.\n\n/**\n * TODO - unpkg.com doesn't seem to have a `latest` specifier for alpha releases...\n * 'beta' on beta branch, 'latest' on prod branch\n */\nexport const NPM_TAG = 'latest';\n\ndeclare let __VERSION__: string;\n\nfunction getVersion() {\n  if (!globalThis._loadersgl_?.version) {\n    globalThis._loadersgl_ = globalThis._loadersgl_ || {};\n    // __VERSION__ is injected by babel-plugin-version-inline\n    if (typeof __VERSION__ === 'undefined') {\n      // eslint-disable-next-line\n      console.warn(\n        'loaders.gl: The __VERSION__ variable is not injected using babel plugin. Latest unstable workers would be fetched from the CDN.'\n      );\n      globalThis._loadersgl_.version = NPM_TAG;\n    } else {\n      globalThis._loadersgl_.version = __VERSION__;\n    }\n  }\n\n  return globalThis._loadersgl_.version;\n}\n\nexport const VERSION = getVersion();\n", "// loaders.gl\n// SPDX-License-Identifier: MIT\n// Copyright (c) vis.gl contributors\n\n// Replacement for the external assert method to reduce bundle size\n// Note: We don't use the second \"message\" argument in calling code,\n// so no need to support it here\n\n/** Throws an `Error` with the optional `message` if `condition` is falsy */\nexport function assert(condition: any, message?: string): void {\n  if (!condition) {\n    throw new Error(message || 'loaders.gl assertion failed.');\n  }\n}\n", "// loaders.gl\n// SPDX-License-Identifier: MIT\n// Copyright (c) vis.gl contributors\n\n// Purpose: include this in your module to avoids adding dependencies on\n// micro modules like 'global' and 'is-browser';\n\n/* eslint-disable no-restricted-globals */\nconst globals = {\n  self: typeof self !== 'undefined' && self,\n  window: typeof window !== 'undefined' && window,\n  global: typeof global !== 'undefined' && global,\n  document: typeof document !== 'undefined' && document\n};\n\nconst self_: {[key: string]: any} = globals.self || globals.window || globals.global || {};\nconst window_: {[key: string]: any} = globals.window || globals.self || globals.global || {};\nconst global_: {[key: string]: any} = globals.global || globals.self || globals.window || {};\nconst document_: {[key: string]: any} = globals.document || {};\n\nexport {self_ as self, window_ as window, global_ as global, document_ as document};\n\n/** true if running in the browser, false if running in Node.js */\nexport const isBrowser: boolean =\n  // @ts-ignore process.browser\n  typeof process !== 'object' || String(process) !== '[object process]' || process.browser;\n\n/** true if running on a worker thread */\nexport const isWorker: boolean = typeof importScripts === 'function';\n\n/** true if running on a mobile device */\nexport const isMobile: boolean =\n  typeof window !== 'undefined' && typeof window.orientation !== 'undefined';\n\n// Extract node major version\nconst matches =\n  typeof process !== 'undefined' && process.version && /v([0-9]*)/.exec(process.version);\n\n/** Version of Node.js if running under Node, otherwise 0 */\nexport const nodeVersion: number = (matches && parseFloat(matches[1])) || 0;\n", "// loaders.gl\n// SPDX-License-Identifier: MIT\n// Copyright (c) vis.gl contributors\n\n/** Browser polyfill for Node.js built-in `worker_threads` module.\n * These fills are non-functional, and just intended to ensure that\n * `import 'worker_threads` doesn't break browser builds.\n * The replacement is done in package.json browser field\n */\nexport class NodeWorker {\n  terminate() {}\n}\n\nexport type {NodeWorker as NodeWorkerType};\n\nexport const parentPort = null;\n", "// loaders.gl\n// SPDX-License-Identifier: MIT\n// Copyright (c) vis.gl contributors\n\n// NOTE - there is a copy of this function is both in core and loader-utils\n// core does not need all the utils in loader-utils, just this one.\n\n/**\n * Returns an array of Transferrable objects that can be used with postMessage\n * https://developer.mozilla.org/en-US/docs/Web/API/Worker/postMessage\n * @param object data to be sent via postMessage\n * @param recursive - not for application use\n * @param transfers - not for application use\n * @returns a transfer list that can be passed to postMessage\n */\nexport function getTransferList(\n  object: any,\n  recursive: boolean = true,\n  transfers?: Set<any>\n): Transferable[] {\n  // Make sure that items in the transfer list is unique\n  const transfersSet = transfers || new Set();\n\n  if (!object) {\n    // ignore\n  } else if (isTransferable(object)) {\n    transfersSet.add(object);\n  } else if (isTransferable(object.buffer)) {\n    // Typed array\n    transfersSet.add(object.buffer);\n  } else if (ArrayBuffer.isView(object)) {\n    // object is a TypeArray viewing into a SharedArrayBuffer (not transferable)\n    // Do not iterate through the content in this case\n  } else if (recursive && typeof object === 'object') {\n    for (const key in object) {\n      // Avoid perf hit - only go one level deep\n      getTransferList(object[key], recursive, transfersSet);\n    }\n  }\n\n  // If transfers is defined, is internal recursive call\n  // Otherwise it's called by the user\n  return transfers === undefined ? Array.from(transfersSet) : [];\n}\n\n// https://developer.mozilla.org/en-US/docs/Web/API/Transferable\nfunction isTransferable(object: unknown) {\n  if (!object) {\n    return false;\n  }\n  if (object instanceof ArrayBuffer) {\n    return true;\n  }\n  if (typeof MessagePort !== 'undefined' && object instanceof MessagePort) {\n    return true;\n  }\n  if (typeof ImageBitmap !== 'undefined' && object instanceof ImageBitmap) {\n    return true;\n  }\n  // @ts-ignore\n  if (typeof OffscreenCanvas !== 'undefined' && object instanceof OffscreenCanvas) {\n    return true;\n  }\n  return false;\n}\n\n/**\n * Recursively drop non serializable values like functions and regexps.\n * @param object\n */\nexport function getTransferListForWriter(object: object | null): object {\n  if (object === null) {\n    return {};\n  }\n  const clone = Object.assign({}, object);\n\n  Object.keys(clone).forEach((key) => {\n    // Typed Arrays and Arrays are passed with no change\n    if (\n      typeof object[key] === 'object' &&\n      !ArrayBuffer.isView(object[key]) &&\n      !(object[key] instanceof Array)\n    ) {\n      clone[key] = getTransferListForWriter(object[key]);\n    } else if (typeof clone[key] === 'function' || clone[key] instanceof RegExp) {\n      clone[key] = {};\n    } else {\n      clone[key] = object[key];\n    }\n  });\n\n  return clone;\n}\n", "// loaders.gl\n// SPDX-License-Identifier: MIT\n// Copyright (c) vis.gl contributors\n\nimport type {WorkerMessageData, WorkerMessageType, WorkerMessagePayload} from '../../types';\nimport {getTransferList} from '../worker-utils/get-transfer-list';\n// import type {TransferListItem} from '../node/worker_threads';\nimport {parentPort} from '../node/worker_threads';\n\ntype TransferListItem = any;\n\n/** Vile hack to defeat over-zealous bundlers from stripping out the require */\nasync function getParentPort() {\n  // const isNode = globalThis.process;\n  // let parentPort;\n  // try {\n  //   // prettier-ignore\n  //   eval('globalThis.parentPort = require(\\'worker_threads\\').parentPort'); // eslint-disable-line no-eval\n  //   parentPort = globalThis.parentPort;\n  // } catch {\n  //   try {\n  //     // prettier-ignore\n  //     eval('globalThis.workerThreadsPromise = import(\\'worker_threads\\')'); // eslint-disable-line no-eval\n  //     const workerThreads = await globalThis.workerThreadsPromise;\n  //     parentPort = workerThreads.parentPort;\n  //   } catch (error) {\n  //     console.error((error as Error).message); // eslint-disable-line no-console\n  //   }\n  // }\n  return parentPort;\n}\n\nconst onMessageWrapperMap = new Map();\n\n/**\n * Type safe wrapper for worker code\n */\nexport default class WorkerBody {\n  /** Check that we are actually in a worker thread */\n  static async inWorkerThread(): Promise<boolean> {\n    return typeof self !== 'undefined' || Boolean(await getParentPort());\n  }\n\n  /*\n   * (type: WorkerMessageType, payload: WorkerMessagePayload) => any\n   */\n  static set onmessage(onMessage: (type: WorkerMessageType, payload: WorkerMessagePayload) => any) {\n    async function handleMessage(message) {\n      const parentPort = await getParentPort();\n      // Confusingly the message itself also has a 'type' field which is always set to 'message'\n      const {type, payload} = parentPort ? message : message.data;\n      // if (!isKnownMessage(message)) {\n      //   return;\n      // }\n      onMessage(type, payload);\n    }\n\n    getParentPort().then((parentPort) => {\n      if (parentPort) {\n        parentPort.on('message', (message) => {\n          handleMessage(message);\n        });\n        // if (message == 'exit') { parentPort.unref(); }\n        // eslint-disable-next-line\n        parentPort.on('exit', () => console.debug('Node worker closing'));\n      } else {\n        // eslint-disable-next-line no-restricted-globals\n        globalThis.onmessage = handleMessage;\n      }\n    });\n  }\n\n  static async addEventListener(\n    onMessage: (type: WorkerMessageType, payload: WorkerMessagePayload) => any\n  ) {\n    let onMessageWrapper = onMessageWrapperMap.get(onMessage);\n\n    if (!onMessageWrapper) {\n      onMessageWrapper = async (message: MessageEvent<any>) => {\n        if (!isKnownMessage(message)) {\n          return;\n        }\n\n        const parentPort = await getParentPort();\n        // Confusingly in the browser, the message itself also has a 'type' field which is always set to 'message'\n        const {type, payload} = parentPort ? message : message.data;\n        onMessage(type, payload);\n      };\n    }\n\n    const parentPort = await getParentPort();\n    if (parentPort) {\n      console.error('not implemented'); // eslint-disable-line\n    } else {\n      globalThis.addEventListener('message', onMessageWrapper);\n    }\n  }\n\n  static async removeEventListener(\n    onMessage: (type: WorkerMessageType, payload: WorkerMessagePayload) => any\n  ) {\n    const onMessageWrapper = onMessageWrapperMap.get(onMessage);\n    onMessageWrapperMap.delete(onMessage);\n    const parentPort = await getParentPort();\n    if (parentPort) {\n      console.error('not implemented'); // eslint-disable-line\n    } else {\n      globalThis.removeEventListener('message', onMessageWrapper);\n    }\n  }\n\n  /**\n   * Send a message from a worker to creating thread (main thread)\n   * @param type\n   * @param payload\n   */\n  static async postMessage(type: WorkerMessageType, payload: WorkerMessagePayload): Promise<void> {\n    const data: WorkerMessageData = {source: 'loaders.gl', type, payload};\n    // console.log('posting message', data);\n\n    // Cast to Node compatible transfer list\n    const transferList = getTransferList(payload) as TransferListItem[];\n\n    const parentPort = await getParentPort();\n    if (parentPort) {\n      parentPort.postMessage(data, transferList);\n      // console.log('posted message', data);\n    } else {\n      // @ts-expect-error Outside of worker scopes this call has a third parameter\n      globalThis.postMessage(data, transferList);\n    }\n  }\n}\n\n// Filter out noise messages sent to workers\nfunction isKnownMessage(message: MessageEvent<any>) {\n  const {type, data} = message;\n  return (\n    type === 'message' &&\n    data &&\n    typeof data.source === 'string' &&\n    data.source.startsWith('loaders.gl')\n  );\n}\n", "// loaders.gl\n// SPDX-License-Identifier: MIT\n// Copyright (c) vis.gl contributors\n\n/* global importScripts */\nimport {isBrowser, isWorker} from '../env-utils/globals';\nimport {assert} from '../env-utils/assert';\nimport {VERSION} from '../env-utils/version';\n\nconst loadLibraryPromises: Record<string, Promise<any>> = {}; // promises\n\n/**\n * Dynamically loads a library (\"module\")\n *\n * - wasm library: Array buffer is returned\n * - js library: Parse JS is returned\n *\n * Method depends on environment\n * - browser - script element is created and installed on document\n * - worker - eval is called on global context\n * - node - file is required\n *\n * @param libraryUrl\n * @param moduleName\n * @param options\n */\nexport async function loadLibrary(\n  libraryUrl: string,\n  moduleName: string | null = null,\n  options: object = {},\n  libraryName: string | null = null\n): Promise<any> {\n  if (moduleName) {\n    libraryUrl = getLibraryUrl(libraryUrl, moduleName, options, libraryName);\n  }\n  // Ensure libraries are only loaded once\n\n  loadLibraryPromises[libraryUrl] =\n    // eslint-disable-next-line @typescript-eslint/no-misused-promises\n    loadLibraryPromises[libraryUrl] || loadLibraryFromFile(libraryUrl);\n  return await loadLibraryPromises[libraryUrl];\n}\n\n// TODO - sort out how to resolve paths for main/worker and dev/prod\nexport function getLibraryUrl(\n  library: string,\n  moduleName?: string,\n  options: any = {},\n  libraryName: string | null = null\n): string {\n  // Check if already a URL\n  if (!options.useLocalLibraries && library.startsWith('http')) {\n    return library;\n  }\n\n  libraryName = libraryName || library;\n\n  // Allow application to import and supply libraries through `options.modules`\n  // TODO - See js-module-utils in loader-utils\n  const modules = options.modules || {};\n  if (modules[libraryName]) {\n    return modules[libraryName];\n  }\n\n  // Load from local files, not from CDN scripts in Node.js\n  // TODO - needs to locate the modules directory when installed!\n  if (!isBrowser) {\n    return `modules/${moduleName}/dist/libs/${libraryName}`;\n  }\n\n  // In browser, load from external scripts\n  if (options.CDN) {\n    assert(options.CDN.startsWith('http'));\n    return `${options.CDN}/${moduleName}@${VERSION}/dist/libs/${libraryName}`;\n  }\n\n  // TODO - loading inside workers requires paths relative to worker script location...\n  if (isWorker) {\n    return `../src/libs/${libraryName}`;\n  }\n\n  return `modules/${moduleName}/src/libs/${libraryName}`;\n}\n\nasync function loadLibraryFromFile(libraryUrl: string): Promise<any> {\n  if (libraryUrl.endsWith('wasm')) {\n    return await loadAsArrayBuffer(libraryUrl);\n  }\n\n  if (!isBrowser) {\n    // TODO - Node doesn't yet support dynamic import from https URLs\n    // try {\n    //   return await import(libraryUrl);\n    // } catch (error) {\n    //   console.error(error);\n    // }\n    try {\n      const {requireFromFile} = globalThis.loaders || {};\n      return await requireFromFile?.(libraryUrl);\n    } catch (error) {\n      console.error(error); // eslint-disable-line no-console\n      return null;\n    }\n  }\n  if (isWorker) {\n    return importScripts(libraryUrl);\n  }\n  // TODO - fix - should be more secure than string parsing since observes CORS\n  // if (isBrowser) {\n  //   return await loadScriptFromFile(libraryUrl);\n  // }\n\n  const scriptSource = await loadAsText(libraryUrl);\n  return loadLibraryFromString(scriptSource, libraryUrl);\n}\n\n/*\nasync function loadScriptFromFile(libraryUrl) {\n  const script = document.createElement('script');\n  script.src = libraryUrl;\n  return await new Promise((resolve, reject) => {\n    script.onload = data => {\n      resolve(data);\n    };\n    script.onerror = reject;\n  });\n}\n*/\n\n// TODO - Needs security audit...\n//  - Raw eval call\n//  - Potentially bypasses CORS\n// Upside is that this separates fetching and parsing\n// we could create a`LibraryLoader` or`ModuleLoader`\nfunction loadLibraryFromString(scriptSource: string, id: string): null | any {\n  if (!isBrowser) {\n    const {requireFromString} = globalThis.loaders || {};\n    return requireFromString?.(scriptSource, id);\n  }\n\n  if (isWorker) {\n    // Use lvalue trick to make eval run in global scope\n    eval.call(globalThis, scriptSource); // eslint-disable-line no-eval\n    // https://stackoverflow.com/questions/9107240/1-evalthis-vs-evalthis-in-javascript\n    // http://perfectionkills.com/global-eval-what-are-the-options/\n    return null;\n  }\n\n  const script = document.createElement('script');\n  script.id = id;\n  // most browsers like a separate text node but some throw an error. The second method covers those.\n  try {\n    script.appendChild(document.createTextNode(scriptSource));\n  } catch (e) {\n    script.text = scriptSource;\n  }\n  document.body.appendChild(script);\n  return null;\n}\n\n// TODO - technique for module injection into worker, from THREE.DracoLoader...\n/*\nfunction combineWorkerWithLibrary(worker, jsContent) {\n  var fn = wWorker.toString();\n  var body = [\n    '// injected',\n    jsContent,\n    '',\n    '// worker',\n    fn.substring(fn.indexOf('{') + 1, fn.lastIndexOf('}'))\n  ].join('\\n');\n  this.workerSourceURL = URL.createObjectURL(new Blob([body]));\n}\n*/\n\nasync function loadAsArrayBuffer(url: string): Promise<ArrayBuffer> {\n  const {readFileAsArrayBuffer} = globalThis.loaders || {};\n  if (isBrowser || !readFileAsArrayBuffer || url.startsWith('http')) {\n    const response = await fetch(url);\n    return await response.arrayBuffer();\n  }\n  return await readFileAsArrayBuffer(url);\n}\n\n/**\n * Load a file from local file system\n * @param filename\n * @returns\n */\nasync function loadAsText(url: string): Promise<string> {\n  const {readFileAsText} = globalThis.loaders || {};\n  if (isBrowser || !readFileAsText || url.startsWith('http')) {\n    const response = await fetch(url);\n    return await response.text();\n  }\n  return await readFileAsText(url);\n}\n", "/* eslint-disable camelcase */\n// This code is inspired by example code in the DRACO repository\nimport type {\n  Draco3D,\n  DracoInt8Array,\n  Encoder,\n  Mesh,\n  MeshBuilder,\n  PointCloud,\n  Metadata,\n  MetadataBuilder,\n  draco_GeometryAttribute_Type\n} from '../draco3d/draco3d-types';\n\nimport type {TypedArray} from '@loaders.gl/schema';\nimport type {DracoMesh} from './draco-types';\n\nexport type DracoBuildOptions = {\n  pointcloud?: boolean;\n  metadata?: {[key: string]: string};\n  attributesMetadata?: {};\n  log?: any;\n\n  // draco encoding options\n  speed?: [number, number];\n  method?: string;\n  quantization?: {[attributeName: string]: number};\n};\n\n// Native Draco attribute names to GLTF attribute names.\nconst GLTF_TO_DRACO_ATTRIBUTE_NAME_MAP = {\n  POSITION: 'POSITION',\n  NORMAL: 'NORMAL',\n  COLOR_0: 'COLOR',\n  TEXCOORD_0: 'TEX_COORD'\n};\n\nconst noop = () => {};\n\nexport default class DracoBuilder {\n  draco: Draco3D;\n  dracoEncoder: Encoder;\n  dracoMeshBuilder: MeshBuilder;\n  dracoMetadataBuilder: MetadataBuilder;\n  log: any;\n\n  // draco - the draco decoder, either import `draco3d` or load dynamically\n  constructor(draco: Draco3D) {\n    this.draco = draco;\n    this.dracoEncoder = new this.draco.Encoder();\n    this.dracoMeshBuilder = new this.draco.MeshBuilder();\n    this.dracoMetadataBuilder = new this.draco.MetadataBuilder();\n  }\n\n  destroy(): void {\n    this.destroyEncodedObject(this.dracoMeshBuilder);\n    this.destroyEncodedObject(this.dracoEncoder);\n    this.destroyEncodedObject(this.dracoMetadataBuilder);\n    // @ts-ignore\n    this.dracoMeshBuilder = null;\n    // @ts-ignore\n    this.dracoEncoder = null;\n    // @ts-ignore\n    this.draco = null;\n  }\n\n  // TBD - when does this need to be called?\n  destroyEncodedObject(object): void {\n    if (object) {\n      this.draco.destroy(object);\n    }\n  }\n\n  /**\n   * Encode mesh or point cloud\n   * @param mesh =({})\n   * @param options\n   */\n  encodeSync(mesh: DracoMesh, options: DracoBuildOptions = {}): ArrayBuffer {\n    this.log = noop; // TODO\n    this._setOptions(options);\n\n    return options.pointcloud\n      ? this._encodePointCloud(mesh, options)\n      : this._encodeMesh(mesh, options);\n  }\n\n  // PRIVATE\n\n  _getAttributesFromMesh(mesh: DracoMesh) {\n    // TODO - Change the encodePointCloud interface instead?\n    const attributes = {...mesh, ...mesh.attributes};\n    // Fold indices into the attributes\n    if (mesh.indices) {\n      attributes.indices = mesh.indices;\n    }\n    return attributes;\n  }\n\n  _encodePointCloud(pointcloud: DracoMesh, options: DracoBuildOptions): ArrayBuffer {\n    const dracoPointCloud = new this.draco.PointCloud();\n\n    if (options.metadata) {\n      this._addGeometryMetadata(dracoPointCloud, options.metadata);\n    }\n\n    const attributes = this._getAttributesFromMesh(pointcloud);\n\n    // Build a `DracoPointCloud` from the input data\n    this._createDracoPointCloud(dracoPointCloud, attributes, options);\n\n    const dracoData = new this.draco.DracoInt8Array();\n\n    try {\n      const encodedLen = this.dracoEncoder.EncodePointCloudToDracoBuffer(\n        dracoPointCloud,\n        false,\n        dracoData\n      );\n\n      if (!(encodedLen > 0)) {\n        throw new Error('Draco encoding failed.');\n      }\n\n      this.log(`DRACO encoded ${dracoPointCloud.num_points()} points\n        with ${dracoPointCloud.num_attributes()} attributes into ${encodedLen} bytes`);\n\n      return dracoInt8ArrayToArrayBuffer(dracoData);\n    } finally {\n      this.destroyEncodedObject(dracoData);\n      this.destroyEncodedObject(dracoPointCloud);\n    }\n  }\n\n  _encodeMesh(mesh: DracoMesh, options: DracoBuildOptions): ArrayBuffer {\n    const dracoMesh = new this.draco.Mesh();\n\n    if (options.metadata) {\n      this._addGeometryMetadata(dracoMesh, options.metadata);\n    }\n\n    const attributes = this._getAttributesFromMesh(mesh);\n\n    // Build a `DracoMesh` from the input data\n    this._createDracoMesh(dracoMesh, attributes, options);\n\n    const dracoData = new this.draco.DracoInt8Array();\n\n    try {\n      const encodedLen = this.dracoEncoder.EncodeMeshToDracoBuffer(dracoMesh, dracoData);\n      if (encodedLen <= 0) {\n        throw new Error('Draco encoding failed.');\n      }\n\n      this.log(`DRACO encoded ${dracoMesh.num_points()} points\n        with ${dracoMesh.num_attributes()} attributes into ${encodedLen} bytes`);\n\n      return dracoInt8ArrayToArrayBuffer(dracoData);\n    } finally {\n      this.destroyEncodedObject(dracoData);\n      this.destroyEncodedObject(dracoMesh);\n    }\n  }\n\n  /**\n   * Set encoding options.\n   * @param {{speed?: any; method?: any; quantization?: any;}} options\n   */\n  _setOptions(options: DracoBuildOptions): void {\n    if ('speed' in options) {\n      // @ts-ignore\n      this.dracoEncoder.SetSpeedOptions(...options.speed);\n    }\n    if ('method' in options) {\n      const dracoMethod = this.draco[options.method || 'MESH_SEQUENTIAL_ENCODING'];\n      // assert(dracoMethod)\n      this.dracoEncoder.SetEncodingMethod(dracoMethod);\n    }\n    if ('quantization' in options) {\n      for (const attribute in options.quantization) {\n        const bits = options.quantization[attribute];\n        const dracoPosition = this.draco[attribute];\n        this.dracoEncoder.SetAttributeQuantization(dracoPosition, bits);\n      }\n    }\n  }\n\n  /**\n   * @param {Mesh} dracoMesh\n   * @param {object} attributes\n   * @returns {Mesh}\n   */\n  _createDracoMesh(dracoMesh: Mesh, attributes, options: DracoBuildOptions): Mesh {\n    const optionalMetadata = options.attributesMetadata || {};\n\n    try {\n      const positions = this._getPositionAttribute(attributes);\n      if (!positions) {\n        throw new Error('positions');\n      }\n      const vertexCount = positions.length / 3;\n\n      for (let attributeName in attributes) {\n        const attribute = attributes[attributeName];\n        attributeName = GLTF_TO_DRACO_ATTRIBUTE_NAME_MAP[attributeName] || attributeName;\n        const uniqueId = this._addAttributeToMesh(dracoMesh, attributeName, attribute, vertexCount);\n\n        if (uniqueId !== -1) {\n          this._addAttributeMetadata(dracoMesh, uniqueId, {\n            name: attributeName,\n            ...(optionalMetadata[attributeName] || {})\n          });\n        }\n      }\n    } catch (error) {\n      this.destroyEncodedObject(dracoMesh);\n      throw error;\n    }\n\n    return dracoMesh;\n  }\n\n  /**\n   * @param {} dracoPointCloud\n   * @param {object} attributes\n   */\n  _createDracoPointCloud(\n    dracoPointCloud: PointCloud,\n    attributes: object,\n    options: DracoBuildOptions\n  ): PointCloud {\n    const optionalMetadata = options.attributesMetadata || {};\n\n    try {\n      const positions = this._getPositionAttribute(attributes);\n      if (!positions) {\n        throw new Error('positions');\n      }\n      const vertexCount = positions.length / 3;\n\n      for (let attributeName in attributes) {\n        const attribute = attributes[attributeName];\n        attributeName = GLTF_TO_DRACO_ATTRIBUTE_NAME_MAP[attributeName] || attributeName;\n        const uniqueId = this._addAttributeToMesh(\n          dracoPointCloud,\n          attributeName,\n          attribute,\n          vertexCount\n        );\n        if (uniqueId !== -1) {\n          this._addAttributeMetadata(dracoPointCloud, uniqueId, {\n            name: attributeName,\n            ...(optionalMetadata[attributeName] || {})\n          });\n        }\n      }\n    } catch (error) {\n      this.destroyEncodedObject(dracoPointCloud);\n      throw error;\n    }\n\n    return dracoPointCloud;\n  }\n\n  /**\n   * @param mesh\n   * @param attributeName\n   * @param attribute\n   * @param vertexCount\n   */\n  _addAttributeToMesh(\n    mesh: PointCloud,\n    attributeName: string,\n    attribute: TypedArray,\n    vertexCount: number\n  ): number {\n    if (!ArrayBuffer.isView(attribute)) {\n      return -1;\n    }\n\n    const type = this._getDracoAttributeType(attributeName);\n    // @ts-ignore TODO/fix types\n    const size = attribute.length / vertexCount;\n\n    if (type === 'indices') {\n      // @ts-ignore TODO/fix types\n      const numFaces = attribute.length / 3;\n      this.log(`Adding attribute ${attributeName}, size ${numFaces}`);\n\n      // @ts-ignore assumes mesh is a Mesh, not a point cloud\n      this.dracoMeshBuilder.AddFacesToMesh(mesh, numFaces, attribute);\n      return -1;\n    }\n\n    this.log(`Adding attribute ${attributeName}, size ${size}`);\n\n    const builder = this.dracoMeshBuilder;\n    const {buffer} = attribute;\n\n    switch (attribute.constructor) {\n      case Int8Array:\n        return builder.AddInt8Attribute(mesh, type, vertexCount, size, new Int8Array(buffer));\n\n      case Int16Array:\n        return builder.AddInt16Attribute(mesh, type, vertexCount, size, new Int16Array(buffer));\n\n      case Int32Array:\n        return builder.AddInt32Attribute(mesh, type, vertexCount, size, new Int32Array(buffer));\n      case Uint8Array:\n      case Uint8ClampedArray:\n        return builder.AddUInt8Attribute(mesh, type, vertexCount, size, new Uint8Array(buffer));\n\n      case Uint16Array:\n        return builder.AddUInt16Attribute(mesh, type, vertexCount, size, new Uint16Array(buffer));\n\n      case Uint32Array:\n        return builder.AddUInt32Attribute(mesh, type, vertexCount, size, new Uint32Array(buffer));\n\n      case Float32Array:\n        return builder.AddFloatAttribute(mesh, type, vertexCount, size, new Float32Array(buffer));\n\n      default:\n        // eslint-disable-next-line no-console\n        console.warn('Unsupported attribute type', attribute);\n        return -1;\n    }\n\n    // case Float64Array:\n    // Add attribute does not seem to be exposed\n    //   return builder.AddAttribute(mesh, type, vertexCount, size, new Float32Array(buffer));\n  }\n\n  /**\n   * DRACO can compress attributes of know type better\n   * TODO - expose an attribute type map?\n   * @param attributeName\n   */\n  _getDracoAttributeType(attributeName: string): draco_GeometryAttribute_Type | 'indices' {\n    switch (attributeName.toLowerCase()) {\n      case 'indices':\n        return 'indices';\n      case 'position':\n      case 'positions':\n      case 'vertices':\n        return this.draco.POSITION;\n      case 'normal':\n      case 'normals':\n        return this.draco.NORMAL;\n      case 'color':\n      case 'colors':\n        return this.draco.COLOR;\n      case 'texcoord':\n      case 'texcoords':\n        return this.draco.TEX_COORD;\n      default:\n        return this.draco.GENERIC;\n    }\n  }\n\n  _getPositionAttribute(attributes) {\n    for (const attributeName in attributes) {\n      const attribute = attributes[attributeName];\n      const dracoType = this._getDracoAttributeType(attributeName);\n      if (dracoType === this.draco.POSITION) {\n        return attribute;\n      }\n    }\n    return null;\n  }\n\n  /**\n   * Add metadata for the geometry.\n   * @param dracoGeometry - WASM Draco Object\n   * @param metadata\n   */\n  _addGeometryMetadata(dracoGeometry: PointCloud, metadata: {[key: string]: string}) {\n    const dracoMetadata = new this.draco.Metadata();\n    this._populateDracoMetadata(dracoMetadata, metadata);\n    this.dracoMeshBuilder.AddMetadata(dracoGeometry, dracoMetadata);\n  }\n\n  /**\n   * Add metadata for an attribute to geometry.\n   * @param dracoGeometry - WASM Draco Object\n   * @param uniqueAttributeId\n   * @param metadata\n   */\n  _addAttributeMetadata(\n    dracoGeometry: PointCloud,\n    uniqueAttributeId: number,\n    metadata: Map<string, string> | {[key: string]: string}\n  ) {\n    // Note: Draco JS IDL doesn't seem to expose draco.AttributeMetadata, however it seems to\n    // create such objects automatically from draco.Metadata object.\n    const dracoAttributeMetadata = new this.draco.Metadata();\n    this._populateDracoMetadata(dracoAttributeMetadata, metadata);\n    // Draco3d doc note: Directly add attribute metadata to geometry.\n    // You can do this without explicitly adding |GeometryMetadata| to mesh.\n    this.dracoMeshBuilder.SetMetadataForAttribute(\n      dracoGeometry,\n      uniqueAttributeId,\n      dracoAttributeMetadata\n    );\n  }\n\n  /**\n   * Add contents of object or map to a WASM Draco Metadata Object\n   * @param dracoMetadata - WASM Draco Object\n   * @param metadata\n   */\n  _populateDracoMetadata(\n    dracoMetadata: Metadata,\n    metadata: Map<string, string> | {[key: string]: string}\n  ) {\n    for (const [key, value] of getEntries(metadata)) {\n      switch (typeof value) {\n        case 'number':\n          if (Math.trunc(value) === value) {\n            this.dracoMetadataBuilder.AddIntEntry(dracoMetadata, key, value);\n          } else {\n            this.dracoMetadataBuilder.AddDoubleEntry(dracoMetadata, key, value);\n          }\n          break;\n        case 'object':\n          if (value instanceof Int32Array) {\n            this.dracoMetadataBuilder.AddIntEntryArray(dracoMetadata, key, value, value.length);\n          }\n          break;\n        case 'string':\n        default:\n          this.dracoMetadataBuilder.AddStringEntry(dracoMetadata, key, value);\n      }\n    }\n  }\n}\n\n// HELPER FUNCTIONS\n\n/**\n * Copy encoded data to buffer\n * @param dracoData\n */\nfunction dracoInt8ArrayToArrayBuffer(dracoData: DracoInt8Array) {\n  const byteLength = dracoData.size();\n  const outputBuffer = new ArrayBuffer(byteLength);\n  const outputData = new Int8Array(outputBuffer);\n  for (let i = 0; i < byteLength; ++i) {\n    outputData[i] = dracoData.GetValue(i);\n  }\n  return outputBuffer;\n}\n\n/** Enable iteration over either an object or a map */\nfunction getEntries(container) {\n  const hasEntriesFunc = container.entries && !container.hasOwnProperty('entries');\n  return hasEntriesFunc ? container.entries() : Object.entries(container);\n}\n", "// Dynamic DRACO module loading inspired by THREE.DRACOLoader\n// https://github.com/mrdoob/three.js/blob/398c4f39ebdb8b23eefd4a7a5ec49ec0c96c7462/examples/jsm/loaders/DRACOLoader.js\n// by Don McCurdy / https://www.donmccurdy.com / MIT license\n\nimport {loadLibrary} from '@loaders.gl/worker-utils';\n\nconst DRACO_DECODER_VERSION = '1.5.6';\nconst DRACO_ENCODER_VERSION = '1.4.1';\n\nconst STATIC_DECODER_URL = `https://www.gstatic.com/draco/versioned/decoders/${DRACO_DECODER_VERSION}`;\n\nexport const DRACO_EXTERNAL_LIBRARIES = {\n  /** The primary Draco3D encoder, javascript wrapper part */\n  DECODER: 'draco_wasm_wrapper.js',\n  /** The primary draco decoder, compiled web assembly part */\n  DECODER_WASM: 'draco_decoder.wasm',\n  /** Fallback decoder for non-webassebly environments. Very big bundle, lower performance */\n  FALLBACK_DECODER: 'draco_decoder.js',\n  /** Draco encoder */\n  ENCODER: 'draco_encoder.js'\n};\n\nexport const DRACO_EXTERNAL_LIBRARY_URLS = {\n  [DRACO_EXTERNAL_LIBRARIES.DECODER]: `${STATIC_DECODER_URL}/${DRACO_EXTERNAL_LIBRARIES.DECODER}`,\n  [DRACO_EXTERNAL_LIBRARIES.DECODER_WASM]: `${STATIC_DECODER_URL}/${DRACO_EXTERNAL_LIBRARIES.DECODER_WASM}`,\n  [DRACO_EXTERNAL_LIBRARIES.FALLBACK_DECODER]: `${STATIC_DECODER_URL}/${DRACO_EXTERNAL_LIBRARIES.FALLBACK_DECODER}`,\n  [DRACO_EXTERNAL_LIBRARIES.ENCODER]: `https://raw.githubusercontent.com/google/draco/${DRACO_ENCODER_VERSION}/javascript/${DRACO_EXTERNAL_LIBRARIES.ENCODER}`\n};\n\nlet loadDecoderPromise;\nlet loadEncoderPromise;\n\nexport async function loadDracoDecoderModule(options) {\n  const modules = options.modules || {};\n\n  // Check if a bundled draco3d library has been supplied by application\n  if (modules.draco3d) {\n    loadDecoderPromise ||= modules.draco3d.createDecoderModule({}).then((draco) => {\n      return {draco};\n    });\n  } else {\n    // If not, dynamically load the WASM script from our CDN\n    loadDecoderPromise ||= loadDracoDecoder(options);\n  }\n  return await loadDecoderPromise;\n}\n\nexport async function loadDracoEncoderModule(options) {\n  const modules = options.modules || {};\n\n  // Check if a bundled draco3d library has been supplied by application\n  if (modules.draco3d) {\n    loadEncoderPromise ||= modules.draco3d.createEncoderModule({}).then((draco) => {\n      return {draco};\n    });\n  } else {\n    // If not, dynamically load the WASM script from our CDN\n    loadEncoderPromise ||= loadDracoEncoder(options);\n  }\n  return await loadEncoderPromise;\n}\n\n// DRACO DECODER LOADING\n\nasync function loadDracoDecoder(options) {\n  let DracoDecoderModule;\n  let wasmBinary;\n  switch (options.draco && options.draco.decoderType) {\n    case 'js':\n      DracoDecoderModule = await loadLibrary(\n        DRACO_EXTERNAL_LIBRARY_URLS[DRACO_EXTERNAL_LIBRARIES.FALLBACK_DECODER],\n        'draco',\n        options,\n        DRACO_EXTERNAL_LIBRARIES.FALLBACK_DECODER\n      );\n      break;\n\n    case 'wasm':\n    default:\n      [DracoDecoderModule, wasmBinary] = await Promise.all([\n        await loadLibrary(\n          DRACO_EXTERNAL_LIBRARY_URLS[DRACO_EXTERNAL_LIBRARIES.DECODER],\n          'draco',\n          options,\n          DRACO_EXTERNAL_LIBRARIES.DECODER\n        ),\n        await loadLibrary(\n          DRACO_EXTERNAL_LIBRARY_URLS[DRACO_EXTERNAL_LIBRARIES.DECODER_WASM],\n          'draco',\n          options,\n          DRACO_EXTERNAL_LIBRARIES.DECODER_WASM\n        )\n      ]);\n  }\n  // Depends on how import happened...\n  // @ts-ignore\n  DracoDecoderModule = DracoDecoderModule || globalThis.DracoDecoderModule;\n  return await initializeDracoDecoder(DracoDecoderModule, wasmBinary);\n}\n\nfunction initializeDracoDecoder(DracoDecoderModule, wasmBinary) {\n  const options: {wasmBinary?: any} = {};\n  if (wasmBinary) {\n    options.wasmBinary = wasmBinary;\n  }\n\n  return new Promise((resolve) => {\n    DracoDecoderModule({\n      ...options,\n      onModuleLoaded: (draco) => resolve({draco}) // Module is Promise-like. Wrap in object to avoid loop.\n    });\n  });\n}\n\n// ENCODER\n\nasync function loadDracoEncoder(options) {\n  let DracoEncoderModule = await loadLibrary(\n    DRACO_EXTERNAL_LIBRARY_URLS[DRACO_EXTERNAL_LIBRARIES.ENCODER],\n    'draco',\n    options,\n    DRACO_EXTERNAL_LIBRARIES.ENCODER\n  );\n  // @ts-ignore\n  DracoEncoderModule = DracoEncoderModule || globalThis.DracoEncoderModule;\n\n  return new Promise((resolve) => {\n    DracoEncoderModule({\n      onModuleLoaded: (draco) => resolve({draco}) // Module is Promise-like. Wrap in object to avoid loop.\n    });\n  });\n}\n", "// Version constant cannot be imported, it needs to correspond to the build version of **this** module.\n// __VERSION__ is injected by babel-plugin-version-inline\n// @ts-ignore TS2304: Cannot find name '__VERSION__'.\nexport const VERSION = typeof __VERSION__ !== 'undefined' ? __VERSION__ : 'latest';\n", "import type {WriterWithEncoder, WriterOptions} from '@loaders.gl/loader-utils';\nimport type {DracoMesh} from './lib/draco-types';\nimport type {DracoBuildOptions} from './lib/draco-builder';\nimport DRACOBuilder from './lib/draco-builder';\nimport {loadDracoEncoderModule} from './lib/draco-module-loader';\nimport {VERSION} from './lib/utils/version';\n\n/** Writer Options for draco */\nexport type DracoWriterOptions = WriterOptions & {\n  draco?: DracoBuildOptions & {\n    method?: 'MESH_EDGEBREAKER_ENCODING' | 'MESH_SEQUENTIAL_ENCODING';\n    speed?: [number, number];\n    quantization?: Record<string, number>;\n    attributeNameEntry?: string;\n  };\n};\n\nconst DEFAULT_DRACO_WRITER_OPTIONS = {\n  pointcloud: false, // Set to true if pointcloud (mode: 0, no indices)\n  attributeNameEntry: 'name'\n  // Draco Compression Parameters\n  // method: 'MESH_EDGEBREAKER_ENCODING', // Use draco defaults\n  // speed: [5, 5], // Use draco defaults\n  // quantization: { // Use draco defaults\n  //   POSITION: 10\n  // }\n};\n\n/**\n * Exporter for Draco3D compressed geometries\n */\nexport const DracoWriter = {\n  name: 'DRACO',\n  id: 'draco',\n  module: 'draco',\n  version: VERSION,\n  extensions: ['drc'],\n  options: {\n    draco: DEFAULT_DRACO_WRITER_OPTIONS\n  },\n  encode\n} as const satisfies WriterWithEncoder<DracoMesh, unknown, DracoWriterOptions>;\n\nasync function encode(data: DracoMesh, options: DracoWriterOptions = {}): Promise<ArrayBuffer> {\n  // Dynamically load draco\n  const {draco} = await loadDracoEncoderModule(options);\n  const dracoBuilder = new DRACOBuilder(draco);\n\n  try {\n    return dracoBuilder.encodeSync(data, options.draco);\n  } finally {\n    dracoBuilder.destroy();\n  }\n}\n", "import {WorkerBody, WorkerMessagePayload} from '@loaders.gl/worker-utils';\nimport {DracoWriter} from '../draco-writer';\n\n(async () => {\n  // Check that we are actually in a worker thread\n  if (!(await WorkerBody.inWorkerThread())) {\n    return;\n  }\n\n  WorkerBody.onmessage = async (type, payload: WorkerMessagePayload) => {\n    switch (type) {\n      case 'process':\n        try {\n          const {input, options} = payload;\n          const result = await DracoWriter.encode(input, options);\n          WorkerBody.postMessage('done', {result});\n        } catch (error) {\n          const message = error instanceof Error ? error.message : '';\n          WorkerBody.postMessage('error', {error: message});\n        }\n        break;\n      default:\n    }\n  };\n})();\n"],
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}