code: void warp() {
          if (isVisible) {
              int[] position = new int[2];
              xLib.XQueryPointer(xdisplay, xwindow, position);
              if (position[0] != nextX || position[1] != nextY) {
                  xLib.XWarpPointer(xdisplay, 0l, 0l, 0, 0, 0, 0,
                                 nextX - position[0],
                                 nextY - position[1]);
              }
          }
      }
docs: Called from the swap buffer implementation for this accelerated screen.
  Tells X to move the cursor by a given x/y offset from the current
  location.