static BufferedImage clipBufferedImage(BufferedImage src, Rectangle clip) {
  ret clipBufferedImage(src, new Rect(clip));
}

static BufferedImage clipBufferedImage(BufferedImage src, Rect r) {
  if (src == null || r == null) null;
  // fixClipRect
  r = intersectRects(r, new Rect(0, 0, src.getWidth(), src.getHeight()));
  if (rectEmpty(r)) null; // can't make zero-sized BufferedImage
    
  ret src.getSubimage(r.x, r.y, r.w, r.h);
}

static BufferedImage clipBufferedImage(BufferedImage src, int x, int y, int w, int h) {
  ret clipBufferedImage(src, Rect(x, y, w, h));
}