@kibeo/loaders.gl-textures/dist/esm/lib/parsers/basis-module-loader.js

Framework-independent loaders for compressed and super compressed (basis) textures

import { loadLibrary } from '@kibeo/loaders.gl-worker-utils';
let loadBasisPromise;
export async function loadBasisModule(options) {
  const modules = options.modules || {};

  if (modules.basis) {
    return modules.basis;
  }

  loadBasisPromise = loadBasisPromise || loadBasis(options);
  return await loadBasisPromise;
}

async function loadBasis(options) {
  let BASIS = null;
  let wasmBinary = null;
  [BASIS, wasmBinary] = await Promise.all([await loadLibrary('basis_transcoder.js', 'textures', options), await loadLibrary('basis_transcoder.wasm', 'textures', options)]);
  BASIS = BASIS || globalThis.BASIS;
  return await initializeBasisModule(BASIS, wasmBinary);
}

function initializeBasisModule(BasisModule, wasmBinary) {
  const options = {};

  if (wasmBinary) {
    options.wasmBinary = wasmBinary;
  }

  return new Promise(resolve => {
    BasisModule(options).then(module => {
      const {
        BasisFile,
        initializeBasis
      } = module;
      initializeBasis();
      resolve({
        BasisFile
      });
    });
  });
}
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