| <!DOCTYPE html> |
| <title>CSS Filters: feDiffuseLighting and feSpecularLighting error handling.</title> |
| <link rel="help" href="https://drafts.fxtf.org/filter-effects/#feDiffuseLightingElement"> |
| <link rel="help" href="https://drafts.fxtf.org/filter-effects/#feSpecularLightingElement"> |
| <link rel="match" href="reference/effect-reference-lighting-no-light.tentative-ref.html"> |
| <meta name="assert" content="This test ensures that invalid parameters to both feDiffuseLighting and feSpecularLighting produce transparent black."/> |
| <style> |
| .target { |
| display: inline-block; |
| width: 100px; |
| height: 100px; |
| background-color: red; |
| } |
| </style> |
| <div class="target" style="filter: url(#noLightDiffuse)"></div> |
| <div class="target" style="filter: url(#noLightSpecular)"></div> |
| <svg height="0" color-interpolation-filters="sRGB"> |
| <filter id="noLightDiffuse" x="0" y="0" width="1" height="1"> |
| <feDiffuseLighting lighting-color="blue"/> |
| <!-- Using 0.5 on the matrices below can cause in different engines |
| an off-by-one difference (127 vs. 128), when rounding 127.5 (255 * 0.5) |
| either up or downwards. |
| Hence, the test uses 0.502 (~128/255) to avoid this tie-break. --> |
| <feColorMatrix values="1 0 0 0 0, |
| 0 1 0 0 0.502, |
| 0 0 1 0 0, |
| 0 0 0 1 1"/> |
| </filter> |
| |
| <filter id="noLightSpecular" x="0" y="0" width="1" height="1"> |
| <feSpecularLighting lighting-color="blue"/> |
| <feColorMatrix values="1 0 0 0 0, |
| 0 1 0 0 0.502, |
| 0 0 1 0 0, |
| 0 0 0 1 1"/> |
| </filter> |
| </svg> |
