CSS3 and HTML5 shape-outside

One solution to doing this would be to use Clip-path

as in this example , you have up to one website which automatically generates but does not support all browsers

But the best solution is to Joseph Fusco that puts a svg to the border he wants drawn. This has support for all browsers

In the example you put you can do as follows

• would create a svg with the white cut drawing
• I would put this svg in base64 with after

If you find it too difficult to get the image fanged into PNG with this transparent cut part