static File resizeJPG(File in, File out, int newW) {
  saveJPG(resizeImage(loadImage2(in), newW), out);
  ret out;
}

static File resizeJPG(File in, int newW) {
  ret resizeJPG(in, replaceExtension(in, "." + newW + ".jpg"), newW);
}

static File resizeJPG(int newW, File in) {
  ret resizeJPG(in, newW);
}