* The contents of the layer will not be visible outside this box, when clipping is
* enabled. The default clipping box is empty (0,0,0,0) which means everything is clipped.
* You can only do rectangular clipping using this API in window coordinates.
* The contents of the layer will not be visible outside this box, when clipping is
* enabled. The default clipping box is empty (0,0,0,0) which means everything is clipped.
* You can only do rectangular clipping using this API in window coordinates.