gif.js

module.exports = function wrapGif(imgData, pathReadyGif) {
  const { w, h, data, repeat } = imgData
  const gif = new GIFEncoder(w, h)
  const stream = fs.createWriteStream(pathReadyGif)
  let counter = 0

  gif.pipe(stream)
  gif.setQuality(10)
  gif.setDelay(0)
  gif.writeHeader()
  gif.setRepeat(-1)

  return new Promise((res, rej) => {
    function addToGif() {
      debug('add to gif with counter - ', counter)

      getPixels(replaceOriginalToGif(data[counter].path), (error, pixels) => {
        if (error) return rej()
        gif.setDelay(data[counter].delay)
        gif.addFrame(pixels.data)
        gif.read()
        if (counter === data.length - 1) {
          gif.finish()
          return res()
        }
        counter++
        addToGif()
      })
    }
    addToGif()
  })
}