@loaders.gl/core/src/javascript-utils/binary-utils.js

Framework-independent loaders for 3D graphics formats

/* global ArrayBuffer, TextEncoder */
import assert from '../utils/assert';
import {toArrayBuffer as bufferToArrayBuffer} from '../node/utils/to-array-buffer.node';

export function toArrayBuffer(data) {
  if (bufferToArrayBuffer) {
    // TODO - per docs we should just be able to call buffer.buffer, but there are issues
    data = bufferToArrayBuffer(data);
  }

  if (data instanceof ArrayBuffer) {
    return data;
  }

  // Careful - Node Buffers will look like ArrayBuffers (keep after isBuffer)
  if (ArrayBuffer.isView(data)) {
    return data.buffer;
  }

  if (typeof data === 'string') {
    const text = data;
    const uint8Array = new TextEncoder().encode(text);
    return uint8Array.buffer;
  }

  return assert(false);
}

// export function blobToArrayBuffer(blob) {
//   return new Promise((resolve, reject) => {
//     let arrayBuffer;
//     const fileReader = new FileReader();
//     fileReader.onload = event => {
//       arrayBuffer = event.target.result;
//     };
//     fileReader.onloadend = event => resolve(arrayBuffer);
//     fileReader.onerror = reject;
//     fileReader.readAsArrayBuffer(blob);
//   });
// }