static ImageSurface jImageSurface() {
  ret swingNu(ImageSurface);
}

// for BWImage
static ImageSurface jImageSurface(MakesBufferedImage img) {
  ret swingNu(ImageSurface, img.getBufferedImage());
}

static ImageSurface jImageSurface(BufferedImage img) {
  ret swingNu(ImageSurface, img);
}