| <!DOCTYPE html> |
| <title>Filter Effects: The in attribute</title> |
| <link rel="author" title="Cameron McCormack" href="mailto:cam@mcc.id.au"> |
| <link rel="help" href="https://www.w3.org/TR/filter-effects-1/#CommonAttributes"> |
| <link rel="match" href="svg-unknown-input-ref.html"> |
| <meta name="flags" content="svg"> |
| <meta name="assert" content="References to non-existent results on a subsequent primitive must be treated like the previous primitive result."> |
| <p>The test passes if you see a green square and no red.</p> |
| <svg width="100" height="100"> |
| <defs> |
| <filter id="f" x="0" y="0" width="100" height="100" filterUnits="userSpaceOnUse"> |
| <feFlood flood-color="green"/> |
| <feComposite in="unknown" in2="SourceGraphic"/> |
| </filter> |
| </defs> |
| <rect width="100" height="100" fill="red"/> |
| <rect x="25" y="25" width="50" height="50" fill="blue" filter="url(#f)"/> |
| </svg> |