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706 lines
19 KiB
706 lines
19 KiB
( function () {
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/**
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* THREE.Loader for Basis Universal GPU Texture Codec.
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*
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* Basis Universal is a "supercompressed" GPU texture and texture video
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* compression system that outputs a highly compressed intermediate file format
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* (.basis) that can be quickly transcoded to a wide variety of GPU texture
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* compression formats.
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*
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* This loader parallelizes the transcoding process across a configurable number
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* of web workers, before transferring the transcoded compressed texture back
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* to the main thread.
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*/
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const _taskCache = new WeakMap();
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class BasisTextureLoader extends THREE.Loader {
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constructor( manager ) {
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super( manager );
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this.transcoderPath = '';
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this.transcoderBinary = null;
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this.transcoderPending = null;
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this.workerLimit = 4;
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this.workerPool = [];
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this.workerNextTaskID = 1;
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this.workerSourceURL = '';
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this.workerConfig = null;
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console.warn( 'THREE.BasisTextureLoader: This loader is deprecated, and will be removed in a future release. ' + 'Instead, use Basis Universal compression in KTX2 (.ktx2) files with THREE.KTX2Loader.' );
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}
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setTranscoderPath( path ) {
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this.transcoderPath = path;
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return this;
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}
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setWorkerLimit( workerLimit ) {
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this.workerLimit = workerLimit;
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return this;
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}
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detectSupport( renderer ) {
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this.workerConfig = {
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astcSupported: renderer.extensions.has( 'WEBGL_compressed_texture_astc' ),
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etc1Supported: renderer.extensions.has( 'WEBGL_compressed_texture_etc1' ),
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etc2Supported: renderer.extensions.has( 'WEBGL_compressed_texture_etc' ),
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dxtSupported: renderer.extensions.has( 'WEBGL_compressed_texture_s3tc' ),
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bptcSupported: renderer.extensions.has( 'EXT_texture_compression_bptc' ),
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pvrtcSupported: renderer.extensions.has( 'WEBGL_compressed_texture_pvrtc' ) || renderer.extensions.has( 'WEBKIT_WEBGL_compressed_texture_pvrtc' )
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};
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return this;
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}
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load( url, onLoad, onProgress, onError ) {
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const loader = new THREE.FileLoader( this.manager );
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loader.setResponseType( 'arraybuffer' );
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loader.setWithCredentials( this.withCredentials );
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const texture = new THREE.CompressedTexture();
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loader.load( url, buffer => {
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// Check for an existing task using this buffer. A transferred buffer cannot be transferred
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// again from this thread.
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if ( _taskCache.has( buffer ) ) {
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const cachedTask = _taskCache.get( buffer );
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return cachedTask.promise.then( onLoad ).catch( onError );
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}
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this._createTexture( [ buffer ] ).then( function ( _texture ) {
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texture.copy( _texture );
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texture.needsUpdate = true;
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if ( onLoad ) onLoad( texture );
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} ).catch( onError );
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}, onProgress, onError );
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return texture;
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}
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/** Low-level transcoding API, exposed for use by KTX2Loader. */
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parseInternalAsync( options ) {
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const {
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levels
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} = options;
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const buffers = new Set();
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for ( let i = 0; i < levels.length; i ++ ) {
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buffers.add( levels[ i ].data.buffer );
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}
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return this._createTexture( Array.from( buffers ), {
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...options,
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lowLevel: true
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} );
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}
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/**
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* @param {ArrayBuffer[]} buffers
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* @param {object?} config
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* @return {Promise<CompressedTexture>}
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*/
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_createTexture( buffers, config = {} ) {
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let worker;
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let taskID;
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const taskConfig = config;
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let taskCost = 0;
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for ( let i = 0; i < buffers.length; i ++ ) {
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taskCost += buffers[ i ].byteLength;
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}
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const texturePending = this._allocateWorker( taskCost ).then( _worker => {
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worker = _worker;
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taskID = this.workerNextTaskID ++;
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return new Promise( ( resolve, reject ) => {
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worker._callbacks[ taskID ] = {
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resolve,
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reject
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};
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worker.postMessage( {
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type: 'transcode',
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id: taskID,
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buffers: buffers,
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taskConfig: taskConfig
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}, buffers );
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} );
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} ).then( message => {
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const {
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mipmaps,
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width,
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height,
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format
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} = message;
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const texture = new THREE.CompressedTexture( mipmaps, width, height, format, THREE.UnsignedByteType );
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texture.minFilter = mipmaps.length === 1 ? THREE.LinearFilter : THREE.LinearMipmapLinearFilter;
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texture.magFilter = THREE.LinearFilter;
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texture.generateMipmaps = false;
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texture.needsUpdate = true;
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return texture;
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} );
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// Note: replaced '.finally()' with '.catch().then()' block - iOS 11 support (#19416)
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texturePending.catch( () => true ).then( () => {
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if ( worker && taskID ) {
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worker._taskLoad -= taskCost;
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delete worker._callbacks[ taskID ];
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}
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} );
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// Cache the task result.
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_taskCache.set( buffers[ 0 ], {
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promise: texturePending
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} );
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return texturePending;
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}
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_initTranscoder() {
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if ( ! this.transcoderPending ) {
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// Load transcoder wrapper.
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const jsLoader = new THREE.FileLoader( this.manager );
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jsLoader.setPath( this.transcoderPath );
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jsLoader.setWithCredentials( this.withCredentials );
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const jsContent = new Promise( ( resolve, reject ) => {
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jsLoader.load( 'basis_transcoder.js', resolve, undefined, reject );
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} );
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// Load transcoder WASM binary.
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const binaryLoader = new THREE.FileLoader( this.manager );
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binaryLoader.setPath( this.transcoderPath );
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binaryLoader.setResponseType( 'arraybuffer' );
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binaryLoader.setWithCredentials( this.withCredentials );
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const binaryContent = new Promise( ( resolve, reject ) => {
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binaryLoader.load( 'basis_transcoder.wasm', resolve, undefined, reject );
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} );
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this.transcoderPending = Promise.all( [ jsContent, binaryContent ] ).then( ( [ jsContent, binaryContent ] ) => {
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const fn = BasisTextureLoader.BasisWorker.toString();
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const body = [ '/* constants */', 'let _EngineFormat = ' + JSON.stringify( BasisTextureLoader.EngineFormat ), 'let _TranscoderFormat = ' + JSON.stringify( BasisTextureLoader.TranscoderFormat ), 'let _BasisFormat = ' + JSON.stringify( BasisTextureLoader.BasisFormat ), '/* basis_transcoder.js */', jsContent, '/* worker */', fn.substring( fn.indexOf( '{' ) + 1, fn.lastIndexOf( '}' ) ) ].join( '\n' );
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this.workerSourceURL = URL.createObjectURL( new Blob( [ body ] ) );
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this.transcoderBinary = binaryContent;
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} );
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}
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return this.transcoderPending;
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}
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_allocateWorker( taskCost ) {
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return this._initTranscoder().then( () => {
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if ( this.workerPool.length < this.workerLimit ) {
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const worker = new Worker( this.workerSourceURL );
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worker._callbacks = {};
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worker._taskLoad = 0;
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worker.postMessage( {
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type: 'init',
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config: this.workerConfig,
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transcoderBinary: this.transcoderBinary
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} );
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worker.onmessage = function ( e ) {
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const message = e.data;
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switch ( message.type ) {
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case 'transcode':
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worker._callbacks[ message.id ].resolve( message );
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break;
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case 'error':
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worker._callbacks[ message.id ].reject( message );
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break;
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default:
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console.error( 'THREE.BasisTextureLoader: Unexpected message, "' + message.type + '"' );
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}
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};
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this.workerPool.push( worker );
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} else {
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this.workerPool.sort( function ( a, b ) {
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return a._taskLoad > b._taskLoad ? - 1 : 1;
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} );
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}
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const worker = this.workerPool[ this.workerPool.length - 1 ];
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worker._taskLoad += taskCost;
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return worker;
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} );
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}
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dispose() {
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for ( let i = 0; i < this.workerPool.length; i ++ ) {
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this.workerPool[ i ].terminate();
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}
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this.workerPool.length = 0;
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return this;
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}
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}
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/* CONSTANTS */
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BasisTextureLoader.BasisFormat = {
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ETC1S: 0,
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UASTC_4x4: 1
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};
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BasisTextureLoader.TranscoderFormat = {
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ETC1: 0,
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ETC2: 1,
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BC1: 2,
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BC3: 3,
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BC4: 4,
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BC5: 5,
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BC7_M6_OPAQUE_ONLY: 6,
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BC7_M5: 7,
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PVRTC1_4_RGB: 8,
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PVRTC1_4_RGBA: 9,
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ASTC_4x4: 10,
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ATC_RGB: 11,
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ATC_RGBA_INTERPOLATED_ALPHA: 12,
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RGBA32: 13,
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RGB565: 14,
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BGR565: 15,
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RGBA4444: 16
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};
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BasisTextureLoader.EngineFormat = {
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RGBAFormat: THREE.RGBAFormat,
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RGBA_ASTC_4x4_Format: THREE.RGBA_ASTC_4x4_Format,
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RGBA_BPTC_Format: THREE.RGBA_BPTC_Format,
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RGBA_ETC2_EAC_Format: THREE.RGBA_ETC2_EAC_Format,
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RGBA_PVRTC_4BPPV1_Format: THREE.RGBA_PVRTC_4BPPV1_Format,
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RGBA_S3TC_DXT5_Format: THREE.RGBA_S3TC_DXT5_Format,
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RGB_ETC1_Format: THREE.RGB_ETC1_Format,
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RGB_ETC2_Format: THREE.RGB_ETC2_Format,
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RGB_PVRTC_4BPPV1_Format: THREE.RGB_PVRTC_4BPPV1_Format,
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RGB_S3TC_DXT1_Format: THREE.RGB_S3TC_DXT1_Format
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};
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/* WEB WORKER */
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BasisTextureLoader.BasisWorker = function () {
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let config;
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let transcoderPending;
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let BasisModule;
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const EngineFormat = _EngineFormat; // eslint-disable-line no-undef
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const TranscoderFormat = _TranscoderFormat; // eslint-disable-line no-undef
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const BasisFormat = _BasisFormat; // eslint-disable-line no-undef
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onmessage = function ( e ) {
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const message = e.data;
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switch ( message.type ) {
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case 'init':
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config = message.config;
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init( message.transcoderBinary );
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break;
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case 'transcode':
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transcoderPending.then( () => {
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try {
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const {
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width,
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height,
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hasAlpha,
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mipmaps,
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format
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} = message.taskConfig.lowLevel ? transcodeLowLevel( message.taskConfig ) : transcode( message.buffers[ 0 ] );
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const buffers = [];
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for ( let i = 0; i < mipmaps.length; ++ i ) {
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buffers.push( mipmaps[ i ].data.buffer );
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}
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self.postMessage( {
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type: 'transcode',
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id: message.id,
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width,
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height,
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hasAlpha,
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mipmaps,
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format
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}, buffers );
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} catch ( error ) {
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console.error( error );
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self.postMessage( {
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type: 'error',
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id: message.id,
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error: error.message
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} );
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}
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} );
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break;
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}
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};
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function init( wasmBinary ) {
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transcoderPending = new Promise( resolve => {
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BasisModule = {
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wasmBinary,
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onRuntimeInitialized: resolve
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};
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BASIS( BasisModule ); // eslint-disable-line no-undef
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} ).then( () => {
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BasisModule.initializeBasis();
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} );
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}
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function transcodeLowLevel( taskConfig ) {
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const {
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basisFormat,
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width,
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height,
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hasAlpha
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} = taskConfig;
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const {
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transcoderFormat,
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engineFormat
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} = getTranscoderFormat( basisFormat, width, height, hasAlpha );
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const blockByteLength = BasisModule.getBytesPerBlockOrPixel( transcoderFormat );
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assert( BasisModule.isFormatSupported( transcoderFormat ), 'THREE.BasisTextureLoader: Unsupported format.' );
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const mipmaps = [];
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if ( basisFormat === BasisFormat.ETC1S ) {
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const transcoder = new BasisModule.LowLevelETC1SImageTranscoder();
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const {
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endpointCount,
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endpointsData,
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selectorCount,
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selectorsData,
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tablesData
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} = taskConfig.globalData;
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try {
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let ok;
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ok = transcoder.decodePalettes( endpointCount, endpointsData, selectorCount, selectorsData );
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assert( ok, 'THREE.BasisTextureLoader: decodePalettes() failed.' );
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ok = transcoder.decodeTables( tablesData );
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assert( ok, 'THREE.BasisTextureLoader: decodeTables() failed.' );
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for ( let i = 0; i < taskConfig.levels.length; i ++ ) {
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const level = taskConfig.levels[ i ];
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const imageDesc = taskConfig.globalData.imageDescs[ i ];
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const dstByteLength = getTranscodedImageByteLength( transcoderFormat, level.width, level.height );
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const dst = new Uint8Array( dstByteLength );
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ok = transcoder.transcodeImage( transcoderFormat, dst, dstByteLength / blockByteLength, level.data, getWidthInBlocks( transcoderFormat, level.width ), getHeightInBlocks( transcoderFormat, level.height ), level.width, level.height, level.index, imageDesc.rgbSliceByteOffset, imageDesc.rgbSliceByteLength, imageDesc.alphaSliceByteOffset, imageDesc.alphaSliceByteLength, imageDesc.imageFlags, hasAlpha, false, 0, 0 );
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assert( ok, 'THREE.BasisTextureLoader: transcodeImage() failed for level ' + level.index + '.' );
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mipmaps.push( {
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data: dst,
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width: level.width,
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height: level.height
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} );
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}
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} finally {
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transcoder.delete();
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}
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} else {
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for ( let i = 0; i < taskConfig.levels.length; i ++ ) {
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const level = taskConfig.levels[ i ];
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const dstByteLength = getTranscodedImageByteLength( transcoderFormat, level.width, level.height );
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const dst = new Uint8Array( dstByteLength );
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const ok = BasisModule.transcodeUASTCImage( transcoderFormat, dst, dstByteLength / blockByteLength, level.data, getWidthInBlocks( transcoderFormat, level.width ), getHeightInBlocks( transcoderFormat, level.height ), level.width, level.height, level.index, 0, level.data.byteLength, 0, hasAlpha, false, 0, 0, - 1, - 1 );
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assert( ok, 'THREE.BasisTextureLoader: transcodeUASTCImage() failed for level ' + level.index + '.' );
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mipmaps.push( {
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data: dst,
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width: level.width,
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height: level.height
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} );
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}
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}
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return {
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width,
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height,
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hasAlpha,
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mipmaps,
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format: engineFormat
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};
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}
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function transcode( buffer ) {
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const basisFile = new BasisModule.BasisFile( new Uint8Array( buffer ) );
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const basisFormat = basisFile.isUASTC() ? BasisFormat.UASTC_4x4 : BasisFormat.ETC1S;
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const width = basisFile.getImageWidth( 0, 0 );
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const height = basisFile.getImageHeight( 0, 0 );
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const levels = basisFile.getNumLevels( 0 );
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const hasAlpha = basisFile.getHasAlpha();
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function cleanup() {
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basisFile.close();
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basisFile.delete();
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}
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const {
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transcoderFormat,
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engineFormat
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} = getTranscoderFormat( basisFormat, width, height, hasAlpha );
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if ( ! width || ! height || ! levels ) {
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cleanup();
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throw new Error( 'THREE.BasisTextureLoader: Invalid texture' );
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}
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if ( ! basisFile.startTranscoding() ) {
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cleanup();
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throw new Error( 'THREE.BasisTextureLoader: .startTranscoding failed' );
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}
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const mipmaps = [];
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for ( let mip = 0; mip < levels; mip ++ ) {
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const mipWidth = basisFile.getImageWidth( 0, mip );
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const mipHeight = basisFile.getImageHeight( 0, mip );
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const dst = new Uint8Array( basisFile.getImageTranscodedSizeInBytes( 0, mip, transcoderFormat ) );
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const status = basisFile.transcodeImage( dst, 0, mip, transcoderFormat, 0, hasAlpha );
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if ( ! status ) {
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cleanup();
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throw new Error( 'THREE.BasisTextureLoader: .transcodeImage failed.' );
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}
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mipmaps.push( {
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data: dst,
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width: mipWidth,
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height: mipHeight
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} );
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}
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cleanup();
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return {
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width,
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height,
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hasAlpha,
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mipmaps,
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format: engineFormat
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};
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}
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//
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// Optimal choice of a transcoder target format depends on the Basis format (ETC1S or UASTC),
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// device capabilities, and texture dimensions. The list below ranks the formats separately
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// for ETC1S and UASTC.
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//
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// In some cases, transcoding UASTC to RGBA32 might be preferred for higher quality (at
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// significant memory cost) compared to ETC1/2, BC1/3, and PVRTC. The transcoder currently
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// chooses RGBA32 only as a last resort and does not expose that option to the caller.
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const FORMAT_OPTIONS = [ {
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if: 'astcSupported',
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basisFormat: [ BasisFormat.UASTC_4x4 ],
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transcoderFormat: [ TranscoderFormat.ASTC_4x4, TranscoderFormat.ASTC_4x4 ],
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engineFormat: [ EngineFormat.RGBA_ASTC_4x4_Format, EngineFormat.RGBA_ASTC_4x4_Format ],
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priorityETC1S: Infinity,
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priorityUASTC: 1,
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needsPowerOfTwo: false
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}, {
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if: 'bptcSupported',
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basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
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transcoderFormat: [ TranscoderFormat.BC7_M5, TranscoderFormat.BC7_M5 ],
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engineFormat: [ EngineFormat.RGBA_BPTC_Format, EngineFormat.RGBA_BPTC_Format ],
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priorityETC1S: 3,
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priorityUASTC: 2,
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needsPowerOfTwo: false
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}, {
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if: 'dxtSupported',
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basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
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transcoderFormat: [ TranscoderFormat.BC1, TranscoderFormat.BC3 ],
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engineFormat: [ EngineFormat.RGB_S3TC_DXT1_Format, EngineFormat.RGBA_S3TC_DXT5_Format ],
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priorityETC1S: 4,
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priorityUASTC: 5,
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needsPowerOfTwo: false
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}, {
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if: 'etc2Supported',
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basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
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transcoderFormat: [ TranscoderFormat.ETC1, TranscoderFormat.ETC2 ],
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engineFormat: [ EngineFormat.RGB_ETC2_Format, EngineFormat.RGBA_ETC2_EAC_Format ],
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priorityETC1S: 1,
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priorityUASTC: 3,
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needsPowerOfTwo: false
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}, {
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if: 'etc1Supported',
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basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
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transcoderFormat: [ TranscoderFormat.ETC1, TranscoderFormat.ETC1 ],
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engineFormat: [ EngineFormat.RGB_ETC1_Format, EngineFormat.RGB_ETC1_Format ],
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priorityETC1S: 2,
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priorityUASTC: 4,
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needsPowerOfTwo: false
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}, {
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if: 'pvrtcSupported',
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basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
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transcoderFormat: [ TranscoderFormat.PVRTC1_4_RGB, TranscoderFormat.PVRTC1_4_RGBA ],
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engineFormat: [ EngineFormat.RGB_PVRTC_4BPPV1_Format, EngineFormat.RGBA_PVRTC_4BPPV1_Format ],
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priorityETC1S: 5,
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priorityUASTC: 6,
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needsPowerOfTwo: true
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} ];
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const ETC1S_OPTIONS = FORMAT_OPTIONS.sort( function ( a, b ) {
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return a.priorityETC1S - b.priorityETC1S;
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} );
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const UASTC_OPTIONS = FORMAT_OPTIONS.sort( function ( a, b ) {
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return a.priorityUASTC - b.priorityUASTC;
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} );
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function getTranscoderFormat( basisFormat, width, height, hasAlpha ) {
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let transcoderFormat;
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let engineFormat;
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const options = basisFormat === BasisFormat.ETC1S ? ETC1S_OPTIONS : UASTC_OPTIONS;
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for ( let i = 0; i < options.length; i ++ ) {
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const opt = options[ i ];
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if ( ! config[ opt.if ] ) continue;
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if ( ! opt.basisFormat.includes( basisFormat ) ) continue;
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if ( opt.needsPowerOfTwo && ! ( isPowerOfTwo( width ) && isPowerOfTwo( height ) ) ) continue;
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transcoderFormat = opt.transcoderFormat[ hasAlpha ? 1 : 0 ];
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engineFormat = opt.engineFormat[ hasAlpha ? 1 : 0 ];
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return {
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transcoderFormat,
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engineFormat
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};
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}
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console.warn( 'THREE.BasisTextureLoader: No suitable compressed texture format found. Decoding to RGBA32.' );
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transcoderFormat = TranscoderFormat.RGBA32;
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engineFormat = EngineFormat.RGBAFormat;
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return {
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transcoderFormat,
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engineFormat
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};
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}
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function assert( ok, message ) {
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if ( ! ok ) throw new Error( message );
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}
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function getWidthInBlocks( transcoderFormat, width ) {
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return Math.ceil( width / BasisModule.getFormatBlockWidth( transcoderFormat ) );
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}
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function getHeightInBlocks( transcoderFormat, height ) {
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return Math.ceil( height / BasisModule.getFormatBlockHeight( transcoderFormat ) );
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}
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function getTranscodedImageByteLength( transcoderFormat, width, height ) {
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const blockByteLength = BasisModule.getBytesPerBlockOrPixel( transcoderFormat );
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if ( BasisModule.formatIsUncompressed( transcoderFormat ) ) {
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return width * height * blockByteLength;
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}
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if ( transcoderFormat === TranscoderFormat.PVRTC1_4_RGB || transcoderFormat === TranscoderFormat.PVRTC1_4_RGBA ) {
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|
// GL requires extra padding for very small textures:
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// https://www.khronos.org/registry/OpenGL/extensions/IMG/IMG_texture_compression_pvrtc.txt
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const paddedWidth = width + 3 & ~ 3;
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const paddedHeight = height + 3 & ~ 3;
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return ( Math.max( 8, paddedWidth ) * Math.max( 8, paddedHeight ) * 4 + 7 ) / 8;
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}
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return getWidthInBlocks( transcoderFormat, width ) * getHeightInBlocks( transcoderFormat, height ) * blockByteLength;
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}
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function isPowerOfTwo( value ) {
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if ( value <= 2 ) return true;
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return ( value & value - 1 ) === 0 && value !== 0;
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}
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};
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THREE.BasisTextureLoader = BasisTextureLoader;
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} )();
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