| <body style="margin: 0;"> |
| <svg xmlns="http://www.w3.org/2000/svg"> |
| <!-- The FO's red half should be filtered to white, with only the green half visible. --> |
| <filter id="filter" width="200" height="10"> |
| <feColorMatrix type="matrix" values="1,0,0,0,0, 1,1,0,0,0, 1,0,1,0,0, 0,0,0,1,0"/> |
| <foreignObject width="200" height="100" filter="url(#filter)" opacity=".5"> |
| <html xmlns="http://www.w3.org/1999/xhtml"> |
| <div style="background: green; height: 50px;"></div> |
| <div style="background: red; height: 50px;"></div> |