| <!DOCTYPE html> |
| <html> |
| <title>CSS Filters: feColorMatrix with SourceAlpha</title> |
| <link rel="author" title="Stephen White" href="mailto:senorblanco@chromium.org"> |
| <link rel="help" href="https://drafts.fxtf.org/filter-effects-1/#feColorMatrixElement"> |
| <link rel="help" href="https://drafts.fxtf.org/filter-effects-1/#attr-valuedef-in-sourcealpha"> |
| <link rel="help" href="https://crbug.com/331362"> |
| <link rel="match" href="reference/effect-reference-source-alpha-002-ref.html"> |
| <meta name="assert" content="Check that the result of an identity feColorMatrix with SourceAlpha from an element with will-change: transform as input is opaque black"/> |
| |
| <style> |
| .rect { |
| position: absolute; |
| background-color: red; |
| width: 100px; |
| height: 100px; |
| filter: url(#alpha); |
| will-change: transform; |
| } |
| </style> |
| <div class="rect"></div> |
| <svg xmlns="http://www.w3.org/2000/svg" width="0" height="0" version="1.1"> |
| <defs> |
| <filter id="alpha" color-interpolation-filters="sRGB"> |
| <feColorMatrix in="SourceAlpha"/> |
| </filter> |
| </defs> |
| </svg> |
