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926 lines
23 KiB
926 lines
23 KiB
/**
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* Loader for KTX 2.0 GPU Texture containers.
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*
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* KTX 2.0 is a container format for various GPU texture formats. The loader
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* supports Basis Universal GPU textures, which can be quickly transcoded to
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* a wide variety of GPU texture compression formats, as well as some
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* uncompressed DataTexture and Data3DTexture formats.
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*
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* References:
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* - KTX: http://github.khronos.org/KTX-Specification/
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* - DFD: https://www.khronos.org/registry/DataFormat/specs/1.3/dataformat.1.3.html#basicdescriptor
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*/
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import {
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CompressedTexture,
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CompressedArrayTexture,
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CompressedCubeTexture,
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Data3DTexture,
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DataTexture,
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DisplayP3ColorSpace,
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FileLoader,
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FloatType,
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HalfFloatType,
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NoColorSpace,
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LinearFilter,
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LinearMipmapLinearFilter,
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LinearDisplayP3ColorSpace,
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LinearSRGBColorSpace,
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Loader,
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RedFormat,
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RGB_ETC1_Format,
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RGB_ETC2_Format,
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RGB_PVRTC_4BPPV1_Format,
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RGBA_ASTC_4x4_Format,
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RGBA_ASTC_6x6_Format,
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RGBA_BPTC_Format,
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RGBA_ETC2_EAC_Format,
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RGBA_PVRTC_4BPPV1_Format,
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RGBA_S3TC_DXT5_Format,
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RGBA_S3TC_DXT1_Format,
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RGBAFormat,
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RGFormat,
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SRGBColorSpace,
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UnsignedByteType,
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} from 'three';
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import { WorkerPool } from '../utils/WorkerPool.js';
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import {
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read,
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KHR_DF_FLAG_ALPHA_PREMULTIPLIED,
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KHR_DF_TRANSFER_SRGB,
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KHR_SUPERCOMPRESSION_NONE,
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KHR_SUPERCOMPRESSION_ZSTD,
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VK_FORMAT_UNDEFINED,
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VK_FORMAT_R16_SFLOAT,
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VK_FORMAT_R16G16_SFLOAT,
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VK_FORMAT_R16G16B16A16_SFLOAT,
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VK_FORMAT_R32_SFLOAT,
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VK_FORMAT_R32G32_SFLOAT,
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VK_FORMAT_R32G32B32A32_SFLOAT,
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VK_FORMAT_R8_SRGB,
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VK_FORMAT_R8_UNORM,
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VK_FORMAT_R8G8_SRGB,
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VK_FORMAT_R8G8_UNORM,
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VK_FORMAT_R8G8B8A8_SRGB,
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VK_FORMAT_R8G8B8A8_UNORM,
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VK_FORMAT_ASTC_6x6_SRGB_BLOCK,
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VK_FORMAT_ASTC_6x6_UNORM_BLOCK,
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KHR_DF_PRIMARIES_UNSPECIFIED,
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KHR_DF_PRIMARIES_BT709,
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KHR_DF_PRIMARIES_DISPLAYP3
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} from '../libs/ktx-parse.module.js';
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import { ZSTDDecoder } from '../libs/zstddec.module.js';
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const _taskCache = new WeakMap();
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let _activeLoaders = 0;
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let _zstd;
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class KTX2Loader extends 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.workerPool = new WorkerPool();
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this.workerSourceURL = '';
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this.workerConfig = null;
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if ( typeof MSC_TRANSCODER !== 'undefined' ) {
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console.warn(
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'THREE.KTX2Loader: Please update to latest "basis_transcoder".'
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+ ' "msc_basis_transcoder" is no longer supported in three.js r125+.'
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);
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}
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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( num ) {
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this.workerPool.setWorkerLimit( num );
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return this;
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}
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async detectSupportAsync( renderer ) {
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this.workerConfig = {
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astcSupported: await renderer.hasFeatureAsync( 'texture-compression-astc' ),
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etc1Supported: await renderer.hasFeatureAsync( 'texture-compression-etc1' ),
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etc2Supported: await renderer.hasFeatureAsync( 'texture-compression-etc2' ),
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dxtSupported: await renderer.hasFeatureAsync( 'texture-compression-bc' ),
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bptcSupported: await renderer.hasFeatureAsync( 'texture-compression-bptc' ),
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pvrtcSupported: await renderer.hasFeatureAsync( 'texture-compression-pvrtc' )
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};
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return this;
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}
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detectSupport( renderer ) {
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if ( renderer.isWebGPURenderer === true ) {
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this.workerConfig = {
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astcSupported: renderer.hasFeature( 'texture-compression-astc' ),
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etc1Supported: renderer.hasFeature( 'texture-compression-etc1' ),
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etc2Supported: renderer.hasFeature( 'texture-compression-etc2' ),
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dxtSupported: renderer.hasFeature( 'texture-compression-bc' ),
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bptcSupported: renderer.hasFeature( 'texture-compression-bptc' ),
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pvrtcSupported: renderer.hasFeature( 'texture-compression-pvrtc' )
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};
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} else {
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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' )
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|| renderer.extensions.has( 'WEBKIT_WEBGL_compressed_texture_pvrtc' )
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};
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}
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return this;
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}
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init() {
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if ( ! this.transcoderPending ) {
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// Load transcoder wrapper.
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const jsLoader = new 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 = jsLoader.loadAsync( 'basis_transcoder.js' );
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// Load transcoder WASM binary.
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const binaryLoader = new 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 = binaryLoader.loadAsync( 'basis_transcoder.wasm' );
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this.transcoderPending = Promise.all( [ jsContent, binaryContent ] )
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.then( ( [ jsContent, binaryContent ] ) => {
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const fn = KTX2Loader.BasisWorker.toString();
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const body = [
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'/* constants */',
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'let _EngineFormat = ' + JSON.stringify( KTX2Loader.EngineFormat ),
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'let _TranscoderFormat = ' + JSON.stringify( KTX2Loader.TranscoderFormat ),
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'let _BasisFormat = ' + JSON.stringify( KTX2Loader.BasisFormat ),
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'/* basis_transcoder.js */',
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jsContent,
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'/* worker */',
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fn.substring( fn.indexOf( '{' ) + 1, fn.lastIndexOf( '}' ) )
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].join( '\n' );
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this.workerSourceURL = URL.createObjectURL( new Blob( [ body ] ) );
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this.transcoderBinary = binaryContent;
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this.workerPool.setWorkerCreator( () => {
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const worker = new Worker( this.workerSourceURL );
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const transcoderBinary = this.transcoderBinary.slice( 0 );
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worker.postMessage( { type: 'init', config: this.workerConfig, transcoderBinary }, [ transcoderBinary ] );
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return worker;
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} );
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} );
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if ( _activeLoaders > 0 ) {
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// Each instance loads a transcoder and allocates workers, increasing network and memory cost.
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console.warn(
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'THREE.KTX2Loader: Multiple active KTX2 loaders may cause performance issues.'
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+ ' Use a single KTX2Loader instance, or call .dispose() on old instances.'
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);
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}
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_activeLoaders ++;
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}
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return this.transcoderPending;
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}
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load( url, onLoad, onProgress, onError ) {
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if ( this.workerConfig === null ) {
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throw new Error( 'THREE.KTX2Loader: Missing initialization with `.detectSupport( renderer )`.' );
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}
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const loader = new FileLoader( this.manager );
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loader.setResponseType( 'arraybuffer' );
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loader.setWithCredentials( this.withCredentials );
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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 )
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.then( ( texture ) => onLoad ? onLoad( texture ) : null )
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.catch( onError );
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}, onProgress, onError );
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}
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_createTextureFrom( transcodeResult, container ) {
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const { faces, width, height, format, type, error, dfdFlags } = transcodeResult;
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if ( type === 'error' ) return Promise.reject( error );
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let texture;
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if ( container.faceCount === 6 ) {
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texture = new CompressedCubeTexture( faces, format, UnsignedByteType );
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} else {
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const mipmaps = faces[ 0 ].mipmaps;
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texture = container.layerCount > 1
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? new CompressedArrayTexture( mipmaps, width, height, container.layerCount, format, UnsignedByteType )
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: new CompressedTexture( mipmaps, width, height, format, UnsignedByteType );
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}
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texture.minFilter = faces[ 0 ].mipmaps.length === 1 ? LinearFilter : LinearMipmapLinearFilter;
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texture.magFilter = LinearFilter;
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texture.generateMipmaps = false;
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texture.needsUpdate = true;
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texture.colorSpace = parseColorSpace( container );
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texture.premultiplyAlpha = !! ( dfdFlags & KHR_DF_FLAG_ALPHA_PREMULTIPLIED );
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return texture;
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}
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/**
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* @param {ArrayBuffer} buffer
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* @param {object?} config
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* @return {Promise<CompressedTexture|CompressedArrayTexture|DataTexture|Data3DTexture>}
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*/
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async _createTexture( buffer, config = {} ) {
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const container = read( new Uint8Array( buffer ) );
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if ( container.vkFormat !== VK_FORMAT_UNDEFINED ) {
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return createRawTexture( container );
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}
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//
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const taskConfig = config;
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const texturePending = this.init().then( () => {
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return this.workerPool.postMessage( { type: 'transcode', buffer, taskConfig: taskConfig }, [ buffer ] );
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} ).then( ( e ) => this._createTextureFrom( e.data, container ) );
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// Cache the task result.
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_taskCache.set( buffer, { promise: texturePending } );
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return texturePending;
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}
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dispose() {
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this.workerPool.dispose();
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if ( this.workerSourceURL ) URL.revokeObjectURL( this.workerSourceURL );
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_activeLoaders --;
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return this;
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}
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}
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/* CONSTANTS */
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KTX2Loader.BasisFormat = {
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ETC1S: 0,
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UASTC_4x4: 1,
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};
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KTX2Loader.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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KTX2Loader.EngineFormat = {
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RGBAFormat: RGBAFormat,
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RGBA_ASTC_4x4_Format: RGBA_ASTC_4x4_Format,
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RGBA_BPTC_Format: RGBA_BPTC_Format,
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RGBA_ETC2_EAC_Format: RGBA_ETC2_EAC_Format,
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RGBA_PVRTC_4BPPV1_Format: RGBA_PVRTC_4BPPV1_Format,
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RGBA_S3TC_DXT5_Format: RGBA_S3TC_DXT5_Format,
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RGB_ETC1_Format: RGB_ETC1_Format,
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RGB_ETC2_Format: RGB_ETC2_Format,
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RGB_PVRTC_4BPPV1_Format: RGB_PVRTC_4BPPV1_Format,
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RGBA_S3TC_DXT1_Format: RGBA_S3TC_DXT1_Format,
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};
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/* WEB WORKER */
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KTX2Loader.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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self.addEventListener( 'message', 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 { faces, buffers, width, height, hasAlpha, format, dfdFlags } = transcode( message.buffer );
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self.postMessage( { type: 'transcode', id: message.id, faces, width, height, hasAlpha, format, dfdFlags }, buffers );
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} catch ( error ) {
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console.error( error );
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self.postMessage( { type: 'error', id: message.id, error: error.message } );
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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 = { wasmBinary, onRuntimeInitialized: resolve };
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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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if ( BasisModule.KTX2File === undefined ) {
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console.warn( 'THREE.KTX2Loader: Please update Basis Universal transcoder.' );
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}
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} );
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}
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function transcode( buffer ) {
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const ktx2File = new BasisModule.KTX2File( new Uint8Array( buffer ) );
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function cleanup() {
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ktx2File.close();
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ktx2File.delete();
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}
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if ( ! ktx2File.isValid() ) {
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cleanup();
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throw new Error( 'THREE.KTX2Loader: Invalid or unsupported .ktx2 file' );
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}
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const basisFormat = ktx2File.isUASTC() ? BasisFormat.UASTC_4x4 : BasisFormat.ETC1S;
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const width = ktx2File.getWidth();
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const height = ktx2File.getHeight();
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const layerCount = ktx2File.getLayers() || 1;
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const levelCount = ktx2File.getLevels();
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const faceCount = ktx2File.getFaces();
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const hasAlpha = ktx2File.getHasAlpha();
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const dfdFlags = ktx2File.getDFDFlags();
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const { transcoderFormat, engineFormat } = getTranscoderFormat( basisFormat, width, height, hasAlpha );
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if ( ! width || ! height || ! levelCount ) {
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cleanup();
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throw new Error( 'THREE.KTX2Loader: Invalid texture' );
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}
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if ( ! ktx2File.startTranscoding() ) {
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cleanup();
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throw new Error( 'THREE.KTX2Loader: .startTranscoding failed' );
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}
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const faces = [];
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const buffers = [];
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for ( let face = 0; face < faceCount; face ++ ) {
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const mipmaps = [];
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for ( let mip = 0; mip < levelCount; mip ++ ) {
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const layerMips = [];
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let mipWidth, mipHeight;
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for ( let layer = 0; layer < layerCount; layer ++ ) {
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const levelInfo = ktx2File.getImageLevelInfo( mip, layer, face );
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if ( face === 0 && mip === 0 && layer === 0 && ( levelInfo.origWidth % 4 !== 0 || levelInfo.origHeight % 4 !== 0 ) ) {
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console.warn( 'THREE.KTX2Loader: ETC1S and UASTC textures should use multiple-of-four dimensions.' );
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}
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if ( levelCount > 1 ) {
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mipWidth = levelInfo.origWidth;
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mipHeight = levelInfo.origHeight;
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} else {
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// Handles non-multiple-of-four dimensions in textures without mipmaps. Textures with
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// mipmaps must use multiple-of-four dimensions, for some texture formats and APIs.
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// See mrdoob/three.js#25908.
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|
mipWidth = levelInfo.width;
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mipHeight = levelInfo.height;
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}
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const dst = new Uint8Array( ktx2File.getImageTranscodedSizeInBytes( mip, layer, 0, transcoderFormat ) );
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const status = ktx2File.transcodeImage( dst, mip, layer, face, transcoderFormat, 0, - 1, - 1 );
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if ( ! status ) {
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cleanup();
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throw new Error( 'THREE.KTX2Loader: .transcodeImage failed.' );
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}
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layerMips.push( dst );
|
|
|
|
}
|
|
|
|
const mipData = concat( layerMips );
|
|
|
|
mipmaps.push( { data: mipData, width: mipWidth, height: mipHeight } );
|
|
buffers.push( mipData.buffer );
|
|
|
|
}
|
|
|
|
faces.push( { mipmaps, width, height, format: engineFormat } );
|
|
|
|
}
|
|
|
|
cleanup();
|
|
|
|
return { faces, buffers, width, height, hasAlpha, format: engineFormat, dfdFlags };
|
|
|
|
}
|
|
|
|
//
|
|
|
|
// Optimal choice of a transcoder target format depends on the Basis format (ETC1S or UASTC),
|
|
// device capabilities, and texture dimensions. The list below ranks the formats separately
|
|
// for ETC1S and UASTC.
|
|
//
|
|
// In some cases, transcoding UASTC to RGBA32 might be preferred for higher quality (at
|
|
// significant memory cost) compared to ETC1/2, BC1/3, and PVRTC. The transcoder currently
|
|
// chooses RGBA32 only as a last resort and does not expose that option to the caller.
|
|
const FORMAT_OPTIONS = [
|
|
{
|
|
if: 'astcSupported',
|
|
basisFormat: [ BasisFormat.UASTC_4x4 ],
|
|
transcoderFormat: [ TranscoderFormat.ASTC_4x4, TranscoderFormat.ASTC_4x4 ],
|
|
engineFormat: [ EngineFormat.RGBA_ASTC_4x4_Format, EngineFormat.RGBA_ASTC_4x4_Format ],
|
|
priorityETC1S: Infinity,
|
|
priorityUASTC: 1,
|
|
needsPowerOfTwo: false,
|
|
},
|
|
{
|
|
if: 'bptcSupported',
|
|
basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
|
|
transcoderFormat: [ TranscoderFormat.BC7_M5, TranscoderFormat.BC7_M5 ],
|
|
engineFormat: [ EngineFormat.RGBA_BPTC_Format, EngineFormat.RGBA_BPTC_Format ],
|
|
priorityETC1S: 3,
|
|
priorityUASTC: 2,
|
|
needsPowerOfTwo: false,
|
|
},
|
|
{
|
|
if: 'dxtSupported',
|
|
basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
|
|
transcoderFormat: [ TranscoderFormat.BC1, TranscoderFormat.BC3 ],
|
|
engineFormat: [ EngineFormat.RGBA_S3TC_DXT1_Format, EngineFormat.RGBA_S3TC_DXT5_Format ],
|
|
priorityETC1S: 4,
|
|
priorityUASTC: 5,
|
|
needsPowerOfTwo: false,
|
|
},
|
|
{
|
|
if: 'etc2Supported',
|
|
basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
|
|
transcoderFormat: [ TranscoderFormat.ETC1, TranscoderFormat.ETC2 ],
|
|
engineFormat: [ EngineFormat.RGB_ETC2_Format, EngineFormat.RGBA_ETC2_EAC_Format ],
|
|
priorityETC1S: 1,
|
|
priorityUASTC: 3,
|
|
needsPowerOfTwo: false,
|
|
},
|
|
{
|
|
if: 'etc1Supported',
|
|
basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
|
|
transcoderFormat: [ TranscoderFormat.ETC1 ],
|
|
engineFormat: [ EngineFormat.RGB_ETC1_Format ],
|
|
priorityETC1S: 2,
|
|
priorityUASTC: 4,
|
|
needsPowerOfTwo: false,
|
|
},
|
|
{
|
|
if: 'pvrtcSupported',
|
|
basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
|
|
transcoderFormat: [ TranscoderFormat.PVRTC1_4_RGB, TranscoderFormat.PVRTC1_4_RGBA ],
|
|
engineFormat: [ EngineFormat.RGB_PVRTC_4BPPV1_Format, EngineFormat.RGBA_PVRTC_4BPPV1_Format ],
|
|
priorityETC1S: 5,
|
|
priorityUASTC: 6,
|
|
needsPowerOfTwo: true,
|
|
},
|
|
];
|
|
|
|
const ETC1S_OPTIONS = FORMAT_OPTIONS.sort( function ( a, b ) {
|
|
|
|
return a.priorityETC1S - b.priorityETC1S;
|
|
|
|
} );
|
|
const UASTC_OPTIONS = FORMAT_OPTIONS.sort( function ( a, b ) {
|
|
|
|
return a.priorityUASTC - b.priorityUASTC;
|
|
|
|
} );
|
|
|
|
function getTranscoderFormat( basisFormat, width, height, hasAlpha ) {
|
|
|
|
let transcoderFormat;
|
|
let engineFormat;
|
|
|
|
const options = basisFormat === BasisFormat.ETC1S ? ETC1S_OPTIONS : UASTC_OPTIONS;
|
|
|
|
for ( let i = 0; i < options.length; i ++ ) {
|
|
|
|
const opt = options[ i ];
|
|
|
|
if ( ! config[ opt.if ] ) continue;
|
|
if ( ! opt.basisFormat.includes( basisFormat ) ) continue;
|
|
if ( hasAlpha && opt.transcoderFormat.length < 2 ) continue;
|
|
if ( opt.needsPowerOfTwo && ! ( isPowerOfTwo( width ) && isPowerOfTwo( height ) ) ) continue;
|
|
|
|
transcoderFormat = opt.transcoderFormat[ hasAlpha ? 1 : 0 ];
|
|
engineFormat = opt.engineFormat[ hasAlpha ? 1 : 0 ];
|
|
|
|
return { transcoderFormat, engineFormat };
|
|
|
|
}
|
|
|
|
console.warn( 'THREE.KTX2Loader: No suitable compressed texture format found. Decoding to RGBA32.' );
|
|
|
|
transcoderFormat = TranscoderFormat.RGBA32;
|
|
engineFormat = EngineFormat.RGBAFormat;
|
|
|
|
return { transcoderFormat, engineFormat };
|
|
|
|
}
|
|
|
|
function isPowerOfTwo( value ) {
|
|
|
|
if ( value <= 2 ) return true;
|
|
|
|
return ( value & ( value - 1 ) ) === 0 && value !== 0;
|
|
|
|
}
|
|
|
|
/** Concatenates N byte arrays. */
|
|
function concat( arrays ) {
|
|
|
|
if ( arrays.length === 1 ) return arrays[ 0 ];
|
|
|
|
let totalByteLength = 0;
|
|
|
|
for ( let i = 0; i < arrays.length; i ++ ) {
|
|
|
|
const array = arrays[ i ];
|
|
totalByteLength += array.byteLength;
|
|
|
|
}
|
|
|
|
const result = new Uint8Array( totalByteLength );
|
|
|
|
let byteOffset = 0;
|
|
|
|
for ( let i = 0; i < arrays.length; i ++ ) {
|
|
|
|
const array = arrays[ i ];
|
|
result.set( array, byteOffset );
|
|
|
|
byteOffset += array.byteLength;
|
|
|
|
}
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
};
|
|
|
|
//
|
|
// Parsing for non-Basis textures. These textures are may have supercompression
|
|
// like Zstd, but they do not require transcoding.
|
|
|
|
const UNCOMPRESSED_FORMATS = new Set( [ RGBAFormat, RGFormat, RedFormat ] );
|
|
|
|
const FORMAT_MAP = {
|
|
|
|
[ VK_FORMAT_R32G32B32A32_SFLOAT ]: RGBAFormat,
|
|
[ VK_FORMAT_R16G16B16A16_SFLOAT ]: RGBAFormat,
|
|
[ VK_FORMAT_R8G8B8A8_UNORM ]: RGBAFormat,
|
|
[ VK_FORMAT_R8G8B8A8_SRGB ]: RGBAFormat,
|
|
|
|
[ VK_FORMAT_R32G32_SFLOAT ]: RGFormat,
|
|
[ VK_FORMAT_R16G16_SFLOAT ]: RGFormat,
|
|
[ VK_FORMAT_R8G8_UNORM ]: RGFormat,
|
|
[ VK_FORMAT_R8G8_SRGB ]: RGFormat,
|
|
|
|
[ VK_FORMAT_R32_SFLOAT ]: RedFormat,
|
|
[ VK_FORMAT_R16_SFLOAT ]: RedFormat,
|
|
[ VK_FORMAT_R8_SRGB ]: RedFormat,
|
|
[ VK_FORMAT_R8_UNORM ]: RedFormat,
|
|
|
|
[ VK_FORMAT_ASTC_6x6_SRGB_BLOCK ]: RGBA_ASTC_6x6_Format,
|
|
[ VK_FORMAT_ASTC_6x6_UNORM_BLOCK ]: RGBA_ASTC_6x6_Format,
|
|
|
|
};
|
|
|
|
const TYPE_MAP = {
|
|
|
|
[ VK_FORMAT_R32G32B32A32_SFLOAT ]: FloatType,
|
|
[ VK_FORMAT_R16G16B16A16_SFLOAT ]: HalfFloatType,
|
|
[ VK_FORMAT_R8G8B8A8_UNORM ]: UnsignedByteType,
|
|
[ VK_FORMAT_R8G8B8A8_SRGB ]: UnsignedByteType,
|
|
|
|
[ VK_FORMAT_R32G32_SFLOAT ]: FloatType,
|
|
[ VK_FORMAT_R16G16_SFLOAT ]: HalfFloatType,
|
|
[ VK_FORMAT_R8G8_UNORM ]: UnsignedByteType,
|
|
[ VK_FORMAT_R8G8_SRGB ]: UnsignedByteType,
|
|
|
|
[ VK_FORMAT_R32_SFLOAT ]: FloatType,
|
|
[ VK_FORMAT_R16_SFLOAT ]: HalfFloatType,
|
|
[ VK_FORMAT_R8_SRGB ]: UnsignedByteType,
|
|
[ VK_FORMAT_R8_UNORM ]: UnsignedByteType,
|
|
|
|
[ VK_FORMAT_ASTC_6x6_SRGB_BLOCK ]: UnsignedByteType,
|
|
[ VK_FORMAT_ASTC_6x6_UNORM_BLOCK ]: UnsignedByteType,
|
|
|
|
};
|
|
|
|
async function createRawTexture( container ) {
|
|
|
|
const { vkFormat } = container;
|
|
|
|
if ( FORMAT_MAP[ vkFormat ] === undefined ) {
|
|
|
|
throw new Error( 'THREE.KTX2Loader: Unsupported vkFormat.' );
|
|
|
|
}
|
|
|
|
//
|
|
|
|
let zstd;
|
|
|
|
if ( container.supercompressionScheme === KHR_SUPERCOMPRESSION_ZSTD ) {
|
|
|
|
if ( ! _zstd ) {
|
|
|
|
_zstd = new Promise( async ( resolve ) => {
|
|
|
|
const zstd = new ZSTDDecoder();
|
|
await zstd.init();
|
|
resolve( zstd );
|
|
|
|
} );
|
|
|
|
}
|
|
|
|
zstd = await _zstd;
|
|
|
|
}
|
|
|
|
//
|
|
|
|
const mipmaps = [];
|
|
|
|
|
|
for ( let levelIndex = 0; levelIndex < container.levels.length; levelIndex ++ ) {
|
|
|
|
const levelWidth = Math.max( 1, container.pixelWidth >> levelIndex );
|
|
const levelHeight = Math.max( 1, container.pixelHeight >> levelIndex );
|
|
const levelDepth = container.pixelDepth ? Math.max( 1, container.pixelDepth >> levelIndex ) : 0;
|
|
|
|
const level = container.levels[ levelIndex ];
|
|
|
|
let levelData;
|
|
|
|
if ( container.supercompressionScheme === KHR_SUPERCOMPRESSION_NONE ) {
|
|
|
|
levelData = level.levelData;
|
|
|
|
} else if ( container.supercompressionScheme === KHR_SUPERCOMPRESSION_ZSTD ) {
|
|
|
|
levelData = zstd.decode( level.levelData, level.uncompressedByteLength );
|
|
|
|
} else {
|
|
|
|
throw new Error( 'THREE.KTX2Loader: Unsupported supercompressionScheme.' );
|
|
|
|
}
|
|
|
|
let data;
|
|
|
|
if ( TYPE_MAP[ vkFormat ] === FloatType ) {
|
|
|
|
data = new Float32Array(
|
|
|
|
levelData.buffer,
|
|
levelData.byteOffset,
|
|
levelData.byteLength / Float32Array.BYTES_PER_ELEMENT
|
|
|
|
);
|
|
|
|
} else if ( TYPE_MAP[ vkFormat ] === HalfFloatType ) {
|
|
|
|
data = new Uint16Array(
|
|
|
|
levelData.buffer,
|
|
levelData.byteOffset,
|
|
levelData.byteLength / Uint16Array.BYTES_PER_ELEMENT
|
|
|
|
);
|
|
|
|
} else {
|
|
|
|
data = levelData;
|
|
|
|
}
|
|
|
|
mipmaps.push( {
|
|
|
|
data: data,
|
|
width: levelWidth,
|
|
height: levelHeight,
|
|
depth: levelDepth,
|
|
|
|
} );
|
|
|
|
}
|
|
|
|
let texture;
|
|
|
|
if ( UNCOMPRESSED_FORMATS.has( FORMAT_MAP[ vkFormat ] ) ) {
|
|
|
|
texture = container.pixelDepth === 0
|
|
? new DataTexture( mipmaps[ 0 ].data, container.pixelWidth, container.pixelHeight )
|
|
: new Data3DTexture( mipmaps[ 0 ].data, container.pixelWidth, container.pixelHeight, container.pixelDepth );
|
|
|
|
} else {
|
|
|
|
if ( container.pixelDepth > 0 ) throw new Error( 'THREE.KTX2Loader: Unsupported pixelDepth.' );
|
|
|
|
texture = new CompressedTexture( mipmaps, container.pixelWidth, container.pixelHeight );
|
|
|
|
}
|
|
|
|
texture.mipmaps = mipmaps;
|
|
|
|
texture.type = TYPE_MAP[ vkFormat ];
|
|
texture.format = FORMAT_MAP[ vkFormat ];
|
|
texture.colorSpace = parseColorSpace( container );
|
|
texture.needsUpdate = true;
|
|
|
|
//
|
|
|
|
return Promise.resolve( texture );
|
|
|
|
}
|
|
|
|
function parseColorSpace( container ) {
|
|
|
|
const dfd = container.dataFormatDescriptor[ 0 ];
|
|
|
|
if ( dfd.colorPrimaries === KHR_DF_PRIMARIES_BT709 ) {
|
|
|
|
return dfd.transferFunction === KHR_DF_TRANSFER_SRGB ? SRGBColorSpace : LinearSRGBColorSpace;
|
|
|
|
} else if ( dfd.colorPrimaries === KHR_DF_PRIMARIES_DISPLAYP3 ) {
|
|
|
|
return dfd.transferFunction === KHR_DF_TRANSFER_SRGB ? DisplayP3ColorSpace : LinearDisplayP3ColorSpace;
|
|
|
|
} else if ( dfd.colorPrimaries === KHR_DF_PRIMARIES_UNSPECIFIED ) {
|
|
|
|
return NoColorSpace;
|
|
|
|
} else {
|
|
|
|
console.warn( `THREE.KTX2Loader: Unsupported color primaries, "${ dfd.colorPrimaries }"` );
|
|
return NoColorSpace;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
export { KTX2Loader };
|