constructor(manager) {
    super(manager);
    this.transcoderPath = '';
    this.transcoderBinary = null;
    this.transcoderPending = null;
    this.workerPool = new _utils_WorkerPool_js__WEBPACK_IMPORTED_MODULE_1__.WorkerPool();
    this.workerSourceURL = '';
    this.workerConfig = null;
    if (typeof MSC_TRANSCODER !== 'undefined') {
      console.warn('THREE.KTX2Loader: Please update to latest "basis_transcoder".' + ' "msc_basis_transcoder" is no longer supported in three.js r125+.');
    }
  }
Loader for KTX 2.0 GPU Texture containers.

KTX 2.0 is a container format for various GPU texture formats. The loader
supports Basis Universal GPU textures, which can be quickly transcoded to
a wide variety of GPU texture compression formats, as well as some
uncompressed DataTexture and Data3DTexture formats.

References:
- KTX: http://github.khronos.org/KTX-Specification/
- DFD: https://www.khronos.org/registry/DataFormat/specs/1.3/dataformat.1.3.html#basicdescriptor
- BasisU HDR: https://github.com/BinomialLLC/basis_universal/wiki/UASTC-HDR-Texture-Specification-v1.0