sclass IIVirtualClip extends Meta implements IIntegralImage {
  RegisteredReference<IIntegralImage> fullImage = new(this);
  int x1, y1, w, h;
  
  *() {}
  *(IIntegralImage fullImage, int *x1, int *y1, int *w, int *h) {
    this.fullImage.set(fullImage);
  }
  
  public int getWidth() { ret w; }
  public int getHeight() { ret h; }

  public double getIntegralValue(int x, int y, int channel) {
    ret fullImage->getIntegralValue(x+x1, y+y1, channel);
  }
    
  public double getIntegralValue(int x, int y) {
    ret fullImage->getIntegralValue(x+x1, y+y1);
  }
  
  public BufferedImage getBufferedImage() {
    ret clipBufferedImage(fullImage->getBufferedImage(), x1, y1, w, h);
  }
}