sclass Hi15Image extends WidthAndHeightImpl is MakesBufferedImage {
  short[] pixels;
  
  *() {} // for persistence
  
  // TODO: optimize!
  *(BufferedImage img) { this(RGBImage(img)); }
  *(RGBImage img) {
    w = img.getWidth();
    h = img.getHeight();
    pixels = new short[w*h];
    for y to h: for x to w:
      pixels[y*w+x] = rgbToHi15(img.getInt(x, y));
  }
  
  RGBImage toRGB() {
    int h = h();
    RGBImage img = new RGBImage(w, h);
    int i = 0;
    for y to h: for x to w:
      img.setPixel(x, y, hi15ToRGBInt_dirty(pixels[i++]));
    ret img;
  }
  
  public BufferedImage getBufferedImage() {
    ret toRGB().getBufferedImage();
  }
  
  // 0 to 32767
  short getHi15Pixel(int x, int y) {
    ret pixels[y*w+x];
  }
}