JSM: Added module and TS file for BasisTextureLoader.

docs/manual/en/introduction/Import-via-modules.html

@@ -186,6 +186,7 @@
 						<li>AssimpJSONLoader</li>
 						<li>AssimpLoader</li>
 						<li>BabylonLoader</li>
+						<li>BasisTextureLoader</li>
 						<li>BVHLoader</li>
 						<li>ColladaLoader</li>
 						<li>DDSLoader</li>

examples/js/loaders/BasisTextureLoader.js

@@ -4,6 +4,8 @@
  * @author Shrek Shao / https://github.com/shrekshao
  */
 
+/* global Module, createBasisModule */
+
 /**
  * Loader for Basis Universal GPU Texture Codec.
  *

examples/jsm/loaders/BasisTextureLoader.d.ts

@@ -0,0 +1,32 @@
+import {
+  CompressedTexture,
+  LoadingManager,
+  WebGLRenderer
+} from '../../../src/Three';
+
+export class BasisTextureLoader {
+  constructor(manager?: LoadingManager);
+  manager: LoadingManager;
+  crossOrigin: string;
+  transcoderBinary: ArrayBuffer | null;
+  transcoderPath: string;
+  transcoderPending: Promise<void> | null;
+
+  workerConfig: {
+    format: number;
+    etcSupported: boolean;
+    dxtSupported: boolean;
+    pvrtcSupported: boolean;
+  }
+  workerLimit: number;
+  workerNextTaskID: number;
+  workerPool: object[];
+  workerSourceURL: string;
+
+  detectSupport(renderer: WebGLRenderer): this;
+  dispose(): void;
+  load(url: string, onLoad: (texture: CompressedTexture) => void, onProgress?: (event: ProgressEvent) => void, onError?: (event: ErrorEvent) => void): void;
+  setCrossOrigin(crossOrigin: string): this;
+  setTranscoderPath(path: string): this;
+  setWorkerLimit(workerLimit: number): this;
+}

examples/jsm/loaders/BasisTextureLoader.js

@@ -0,0 +1,507 @@
+/**
+ * @author Don McCurdy / https://www.donmccurdy.com
+ * @author Austin Eng / https://github.com/austinEng
+ * @author Shrek Shao / https://github.com/shrekshao
+ */
+
+import {
+	CompressedTexture,
+	DefaultLoadingManager,
+	FileLoader,
+	LinearFilter,
+	LinearMipMapLinearFilter,
+	RGB_ETC1_Format,
+	RGB_PVRTC_4BPPV1_Format,
+	UnsignedByteType
+} from "../../../build/three.module.js";
+
+/* global Module, createBasisModule */
+
+/**
+ * Loader for Basis Universal GPU Texture Codec.
+ *
+ * Basis Universal is a "supercompressed" GPU texture and texture video
+ * compression system that outputs a highly compressed intermediate file format
+ * (.basis) that can be quickly transcoded to a wide variety of GPU texture
+ * compression formats.
+ *
+ * This loader parallelizes the transcoding process across a configurable number
+ * of web workers, before transferring the transcoded compressed texture back
+ * to the main thread.
+ */
+var BasisTextureLoader = function ( manager ) {
+
+	this.manager = manager || DefaultLoadingManager;
+
+	this.crossOrigin = 'anonymous';
+
+	this.transcoderPath = '';
+	this.transcoderBinary = null;
+	this.transcoderPending = null;
+
+	this.workerLimit = 4;
+	this.workerPool = [];
+	this.workerNextTaskID = 1;
+	this.workerSourceURL = '';
+	this.workerConfig = {
+		format: null,
+		etcSupported: false,
+		dxtSupported: false,
+		pvrtcSupported: false,
+	};
+
+};
+
+BasisTextureLoader.prototype = {
+
+	constructor: BasisTextureLoader,
+
+	setCrossOrigin: function ( crossOrigin ) {
+
+		this.crossOrigin = crossOrigin;
+
+		return this;
+
+	},
+
+	setTranscoderPath: function ( path ) {
+
+		this.transcoderPath = path;
+
+		return this;
+
+	},
+
+	setWorkerLimit: function ( workerLimit ) {
+
+		this.workerLimit = workerLimit;
+
+		return this;
+
+	},
+
+	detectSupport: function ( renderer ) {
+
+		var context = renderer.context;
+		var config = this.workerConfig;
+
+		config.etcSupported = !! context.getExtension( 'WEBGL_compressed_texture_etc1' );
+		config.dxtSupported = !! context.getExtension( 'WEBGL_compressed_texture_s3tc' );
+		config.pvrtcSupported = !! context.getExtension( 'WEBGL_compressed_texture_pvrtc' )
+			|| !! context.getExtension( 'WEBKIT_WEBGL_compressed_texture_pvrtc' );
+
+		if ( config.etcSupported ) {
+
+			config.format = BasisTextureLoader.BASIS_FORMAT.cTFETC1;
+
+		} else if ( config.dxtSupported ) {
+
+			config.format = BasisTextureLoader.BASIS_FORMAT.cTFBC1;
+
+		} else if ( config.pvrtcSupported ) {
+
+			config.format = BasisTextureLoader.BASIS_FORMAT.cTFPVRTC1_4_OPAQUE_ONLY;
+
+		} else {
+
+			throw new Error( 'THREE.BasisTextureLoader: No suitable compressed texture format found.' );
+
+		}
+
+		return this;
+
+	},
+
+	load: function ( url, onLoad, onProgress, onError ) {
+
+		var loader = new FileLoader( this.manager );
+
+		loader.setResponseType( 'arraybuffer' );
+
+		loader.load( url, ( buffer ) => {
+
+			this._createTexture( buffer )
+				.then( onLoad )
+				.catch( onError );
+
+		}, onProgress, onError );
+
+	},
+
+	/**
+	 * @param  {ArrayBuffer} buffer
+	 * @return {Promise<CompressedTexture>}
+	 */
+	_createTexture: function ( buffer ) {
+
+		var worker;
+		var taskID;
+
+		var texturePending = this._getWorker()
+			.then( ( _worker ) => {
+
+				worker = _worker;
+				taskID = this.workerNextTaskID ++;
+
+				return new Promise( ( resolve, reject ) => {
+
+					worker._callbacks[ taskID ] = { resolve, reject };
+					worker._taskCosts[ taskID ] = buffer.byteLength;
+					worker._taskLoad += worker._taskCosts[ taskID ];
+
+					worker.postMessage( { type: 'transcode', id: taskID, buffer }, [ buffer ] );
+
+				} );
+
+			} )
+			.then( ( message ) => {
+
+				var config = this.workerConfig;
+
+				var { width, height, mipmaps } = message;
+
+				var texture;
+
+				if ( config.etcSupported ) {
+
+					texture = new CompressedTexture( mipmaps, width, height, RGB_ETC1_Format );
+
+				} else if ( config.dxtSupported ) {
+
+					texture = new CompressedTexture( mipmaps, width, height, BasisTextureLoader.DXT_FORMAT_MAP[ config.format ], UnsignedByteType );
+
+				} else if ( config.pvrtcSupported ) {
+
+					texture = new CompressedTexture( mipmaps, width, height, RGB_PVRTC_4BPPV1_Format );
+
+				} else {
+
+					throw new Error( 'THREE.BasisTextureLoader: No supported format available.' );
+
+				}
+
+				texture.minFilter = mipmaps.length === 1 ? LinearFilter : LinearMipMapLinearFilter;
+				texture.magFilter = LinearFilter;
+				texture.generateMipmaps = false;
+				texture.needsUpdate = true;
+
+				return texture;
+
+			} );
+
+		texturePending
+			.finally( () => {
+
+				if ( worker && taskID ) {
+
+					worker._taskLoad -= worker._taskCosts[ taskID ];
+					delete worker._callbacks[ taskID ];
+					delete worker._taskCosts[ taskID ];
+
+				}
+
+			} );
+
+		return texturePending;
+
+	},
+
+	_initTranscoder: function () {
+
+		if ( ! this.transcoderBinary ) {
+
+			// Load transcoder wrapper.
+			var jsLoader = new FileLoader( this.manager );
+			jsLoader.setPath( this.transcoderPath );
+			var jsContent = new Promise( ( resolve, reject ) => {
+
+				jsLoader.load( 'basis_transcoder.js', resolve, undefined, reject );
+
+			} );
+
+			// Load transcoder WASM binary.
+			var binaryLoader = new FileLoader( this.manager );
+			binaryLoader.setPath( this.transcoderPath );
+			binaryLoader.setResponseType( 'arraybuffer' );
+			var binaryContent = new Promise( ( resolve, reject ) => {
+
+				binaryLoader.load( 'basis_transcoder.wasm', resolve, undefined, reject );
+
+			} );
+
+			this.transcoderPending = Promise.all( [ jsContent, binaryContent ] )
+				.then( ( [ jsContent, binaryContent ] ) => {
+
+					var fn = BasisTextureLoader.BasisWorker.toString();
+
+					var body = [
+						'/* basis_transcoder.js */',
+						'var Module;',
+						'function createBasisModule () {',
+						'  ' + jsContent,
+						'  return Module;',
+						'}',
+						'',
+						'/* worker */',
+						fn.substring( fn.indexOf( '{' ) + 1, fn.lastIndexOf( '}' ) )
+					].join( '\n' );
+
+					this.workerSourceURL = URL.createObjectURL( new Blob( [ body ] ) );
+					this.transcoderBinary = binaryContent;
+
+				} );
+
+		}
+
+		return this.transcoderPending;
+
+	},
+
+	_getWorker: function () {
+
+		return this._initTranscoder().then( () => {
+
+			if ( this.workerPool.length < this.workerLimit ) {
+
+				var worker = new Worker( this.workerSourceURL );
+
+				worker._callbacks = {};
+				worker._taskCosts = {};
+				worker._taskLoad = 0;
+
+				worker.postMessage( {
+					type: 'init',
+					config: this.workerConfig,
+					transcoderBinary: this.transcoderBinary,
+				} );
+
+				worker.onmessage = function ( e ) {
+
+					var message = e.data;
+
+					switch ( message.type ) {
+
+						case 'transcode':
+							worker._callbacks[ message.id ].resolve( message );
+							break;
+
+						case 'error':
+							worker._callbacks[ message.id ].reject( message );
+							break;
+
+						default:
+							console.error( 'THREE.BasisTextureLoader: Unexpected message, "' + message.type + '"' );
+
+					}
+
+				};
+
+				this.workerPool.push( worker );
+
+			} else {
+
+				this.workerPool.sort( function ( a, b ) {
+
+					return a._taskLoad > b._taskLoad ? - 1 : 1;
+
+				} );
+
+			}
+
+			return this.workerPool[ this.workerPool.length - 1 ];
+
+		} );
+
+	},
+
+	dispose: function () {
+
+		for ( var i = 0; i < this.workerPool.length; i ++ ) {
+
+			this.workerPool[ i ].terminate();
+
+		}
+
+		this.workerPool.length = 0;
+
+		return this;
+
+	}
+};
+
+/* CONSTANTS */
+
+BasisTextureLoader.BASIS_FORMAT = {
+	cTFETC1: 0,
+	cTFBC1: 1,
+	cTFBC4: 2,
+	cTFPVRTC1_4_OPAQUE_ONLY: 3,
+	cTFBC7_M6_OPAQUE_ONLY: 4,
+	cTFETC2: 5,
+	cTFBC3: 6,
+	cTFBC5: 7,
+};
+
+// DXT formats, from:
+// http://www.khronos.org/registry/webgl/extensions/WEBGL_compressed_texture_s3tc/
+BasisTextureLoader.DXT_FORMAT = {
+	COMPRESSED_RGB_S3TC_DXT1_EXT: 0x83F0,
+	COMPRESSED_RGBA_S3TC_DXT1_EXT: 0x83F1,
+	COMPRESSED_RGBA_S3TC_DXT3_EXT: 0x83F2,
+	COMPRESSED_RGBA_S3TC_DXT5_EXT: 0x83F3,
+};
+BasisTextureLoader.DXT_FORMAT_MAP = {};
+BasisTextureLoader.DXT_FORMAT_MAP[ BasisTextureLoader.BASIS_FORMAT.cTFBC1 ] =
+	BasisTextureLoader.DXT_FORMAT.COMPRESSED_RGB_S3TC_DXT1_EXT;
+BasisTextureLoader.DXT_FORMAT_MAP[ BasisTextureLoader.BASIS_FORMAT.cTFBC3 ] =
+	BasisTextureLoader.DXT_FORMAT.COMPRESSED_RGBA_S3TC_DXT5_EXT;
+
+/* WEB WORKER */
+
+BasisTextureLoader.BasisWorker = function () {
+
+	var config;
+	var transcoderPending;
+	var _BasisFile;
+
+	onmessage = function ( e ) {
+
+		var message = e.data;
+
+		switch ( message.type ) {
+
+			case 'init':
+				config = message.config;
+				init( message.transcoderBinary );
+				break;
+
+			case 'transcode':
+				transcoderPending.then( () => {
+
+					try {
+
+						var { width, height, mipmaps } = transcode( message.buffer );
+
+						var buffers = [];
+
+						for ( var i = 0; i < mipmaps.length; ++ i ) {
+
+							buffers.push( mipmaps[ i ].data.buffer );
+
+						}
+
+						self.postMessage( { type: 'transcode', id: message.id, width, height, mipmaps }, buffers );
+
+					} catch ( error ) {
+
+						console.error( error );
+
+						self.postMessage( { type: 'error', id: message.id, error: error.message } );
+
+					}
+
+				} );
+				break;
+
+		}
+
+	};
+
+	function init( wasmBinary ) {
+
+		transcoderPending = new Promise( ( resolve ) => {
+
+			// The 'Module' global is used by the Basis wrapper, which will check for
+			// the 'wasmBinary' property before trying to load the file itself.
+
+			// TODO(donmccurdy): This only works with a modified version of the
+			// emscripten-generated wrapper. The default seems to have a bug making it
+			// impossible to override the WASM binary.
+			Module = { wasmBinary, onRuntimeInitialized: resolve };
+
+		} ).then( () => {
+
+			var { BasisFile, initializeBasis } = Module;
+
+			_BasisFile = BasisFile;
+
+			initializeBasis();
+
+		} );
+
+		createBasisModule();
+
+	}
+
+	function transcode( buffer ) {
+
+		var basisFile = new _BasisFile( new Uint8Array( buffer ) );
+
+		var width = basisFile.getImageWidth( 0, 0 );
+		var height = basisFile.getImageHeight( 0, 0 );
+		var levels = basisFile.getNumLevels( 0 );
+
+		function cleanup() {
+
+			basisFile.close();
+			basisFile.delete();
+
+		}
+
+		if ( ! width || ! height || ! levels ) {
+
+			cleanup();
+			throw new Error( 'THREE.BasisTextureLoader:  Invalid .basis file' );
+
+		}
+
+		if ( ! basisFile.startTranscoding() ) {
+
+			cleanup();
+			throw new Error( 'THREE.BasisTextureLoader: .startTranscoding failed' );
+
+		}
+
+		if ( basisFile.getHasAlpha() ) {
+
+			console.warn( 'THREE.BasisTextureLoader: Alpha not yet implemented.' );
+
+		}
+
+		var mipmaps = [];
+
+		for ( var mip = 0; mip < levels; mip ++ ) {
+
+			var mipWidth = basisFile.getImageWidth( 0, mip );
+			var mipHeight = basisFile.getImageHeight( 0, mip );
+			var dst = new Uint8Array( basisFile.getImageTranscodedSizeInBytes( 0, mip, config.format ) );
+
+			var status = basisFile.transcodeImage(
+				dst,
+				0,
+				mip,
+				config.format,
+				config.etcSupported ? 0 : ( config.dxtSupported ? 1 : 0 ),
+				0
+			);
+
+			if ( ! status ) {
+
+				cleanup();
+				throw new Error( 'THREE.BasisTextureLoader: .transcodeImage failed.' );
+
+			}
+
+			mipmaps.push( { data: dst, width: mipWidth, height: mipHeight } );
+
+		}
+
+		cleanup();
+
+		return { width, height, mipmaps };
+
+	}
+
+};
+
+export { BasisTextureLoader };

examples/webgl_loader_texture_basis.html

@@ -9,51 +9,60 @@
 	<body>
 
 		<div id="info">
-			<a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - webgl - basis texture loader<br />
+			<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - webgl - basis texture loader<br />
 			<a href="https://github.com/binomialLLC/basis_universal" target="_blank">Basis Universal GPU Texture Codec</a>
 		</div>
 
-		<script src="../build/three.js"></script>
-		<script src="js/loaders/BasisTextureLoader.js"></script>
+		<script type="module">
+			import {
+				BoxBufferGeometry,
+				Clock,
+				Mesh,
+				MeshBasicMaterial,
+				PerspectiveCamera,
+				Scene,
+				sRGBEncoding,
+				WebGLRenderer,
+			} from "../build/three.module.js";
 
-		<script>
+			import { BasisTextureLoader } from './jsm/loaders/BasisTextureLoader.js';
 
 			var camera, scene, renderer;
 			var mesh;
 
-			var clock = new THREE.Clock();
+			var clock = new Clock();
 
 			init();
 			animate();
 
 			function init() {
 
-				renderer = new THREE.WebGLRenderer( { antialias: true } );
+				renderer = new WebGLRenderer( { antialias: true } );
 				renderer.setPixelRatio( window.devicePixelRatio );
 				renderer.setSize( window.innerWidth, window.innerHeight );
 				renderer.gammaOutput = true;
 				renderer.gammaFactor = 2.2;
 				document.body.appendChild( renderer.domElement );
 
-				camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 2000 );
+				camera = new PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 2000 );
 				camera.position.z = 500;
 
-				scene = new THREE.Scene();
+				scene = new Scene();
 
-				var geometry = new THREE.BoxBufferGeometry( 200, 200, 200 );
-				var material = new THREE.MeshBasicMaterial();
+				var geometry = new BoxBufferGeometry( 200, 200, 200 );
+				var material = new MeshBasicMaterial();
 
-				mesh = new THREE.Mesh( geometry, material );
+				mesh = new Mesh( geometry, material );
 
 				scene.add( mesh );
 
-				var loader = new THREE.BasisTextureLoader();
+				var loader = new BasisTextureLoader();
 				loader.setTranscoderPath( 'js/libs/basis/' );
 				loader.detectSupport( renderer );
 
 				loader.load( 'textures/compressed/PavingStones.basis', function ( texture ) {
 
-					texture.encoding = THREE.sRGBEncoding;
+					texture.encoding = sRGBEncoding;
 					material.map = texture;
 					material.needsUpdate = true;
 

utils/modularize.js

@@ -81,6 +81,7 @@ var files = [
 	{ path: 'loaders/AssimpJSONLoader.js', dependencies: [], ignoreList: [] },
 	{ path: 'loaders/AssimpLoader.js', dependencies: [], ignoreList: [] },
 	{ path: 'loaders/BabylonLoader.js', dependencies: [], ignoreList: [] },
+	{ path: 'loaders/BasisTextureLoader.js', dependencies: [], ignoreList: [] },
 	{ path: 'loaders/BVHLoader.js', dependencies: [], ignoreList: [ 'Bones' ] },
 	{ path: 'loaders/ColladaLoader.js', dependencies: [ { name: 'TGALoader', path: 'loaders/TGALoader.js' } ], ignoreList: [] },
 	{ path: 'loaders/DDSLoader.js', dependencies: [], ignoreList: [] },