static int autoShoot_maxW = 500, autoShoot_maxH = 200;

sclass AutoShootInfo {
  long screenshotTime;
  L<Rect> segments;
  int considered;
}

static AutoShootInfo autoShoot() {
  ret autoShoot(f shootScreenBW);
}

static AutoShootInfo autoShoot(O shootFunc) {
  new AutoShootInfo info;
  info.screenshotTime = now();
  BWImage screen = cast callF(shootFunc);
  info.segments = autoSegment(screen);
  for (Rect r : info.segments) {
    if (r.w > autoShoot_maxW || r.h > autoShoot_maxH) continue;
    ++info.considered;
    BWImage image = screen.clip(r);
    S md5 = md5OfBWImage(image);
    GrabbedImage gi = uniq(GrabbedImage, +md5);
    if (gi.image == null) cset(gi, +image);
    cset(gi,
      lastRect := r,
      lastScreenshotTime := info.screenshotTime,
      count := gi.count+1);
  }
  ret info;
}