Function replaceJPEGHead

js/load-image-meta.js:194–199

* Replaces the head of a JPEG Blob * * @param {Blob} blob Blob object * @param {ArrayBuffer} oldHead Old JPEG head * @param {ArrayBuffer} newHead New JPEG head * @returns {Blob} Combined Blob

(blob, oldHead, newHead)

   * @returns {Blob} Combined Blob
   */
  function replaceJPEGHead(blob, oldHead, newHead) {
    if (!blob || !oldHead || !newHead) return null
    return new Blob([newHead, blobSlice.call(blob, oldHead.byteLength)], {
      type: 'image/jpeg'
    })
  }

  /**
   * Replaces the image head of a JPEG blob with the given one.