srecord noeq WidthAndHeightImpl(int width, int height) extends Meta is WidthAndHeight, ByteIO {
  public int getWidth() { ret width; }
  public int getHeight() { ret height; }
  
  toString { ret n2(width) + "*" + n2(height) + " px"; }
  
  public void readWrite(ByteHead head) {
    head.exchangeInt(l0 width, l1 setWidth);
    head.exchangeInt(l0 height, l1 setHeight);
  }
}