| <!DOCTYPE html> |
| <title>CSS Filter Effects: feTurbulence with negative values from baseFrequency</title> |
| <link rel="help" href="https://drafts.fxtf.org/filter-effects/#element-attrdef-feturbulence-basefrequency"> |
| <link rel="help" href="https://crbug.com/1068863"/> |
| <link rel="match" href="reference/filter-turbulence-invalid-001-ref.html"> |
| <meta name="assert" content="This test checks that negative baseFrequency values are unsupported for feTurbulence."> |
| <style> |
| .target { |
| display: inline-block; |
| width: 100px; |
| height: 100px; |
| background-color: red; |
| } |
| </style> |
| <div class="target" style="filter: url(#fn1)"></div> |
| <div class="target" style="filter: url(#fn2)"></div> |
| <div class="target" style="filter: url(#tb1)"></div> |
| <div class="target" style="filter: url(#tb2)"></div> |
| <svg height="0" color-interpolation-filters="sRGB"> |
| <!-- type=fractalNoise --> |
| <filter id="fn1" x="0" y="0" width="1" height="1"> |
| <feTurbulence type="fractalNoise" baseFrequency="-1 1"/> |
| <feComponentTransfer> |
| <feFuncR type="discrete" tableValues="1 0 1"/> |
| <feFuncG type="discrete" tableValues="0 0.502 0"/> <!-- map [0..1/3] -> 0; [1/3...2/3] -> 0.502; [2/3..1] -> 0 --> |
| <feFuncB type="discrete" tableValues="0"/> |
| <feFuncA type="discrete" tableValues="0 1 0"/> |
| </feComponentTransfer> |
| </filter> |
| |
| <filter id="fn2" x="0" y="0" width="1" height="1"> |
| <feTurbulence type="fractalNoise" baseFrequency="1 -1"/> |
| <feComponentTransfer> |
| <feFuncR type="discrete" tableValues="1 0 1"/> |
| <feFuncG type="discrete" tableValues="0 0.502 0"/> <!-- map [0..1/3] -> 0; [1/3...2/3] -> 0.502; [2/3..1] -> 0 --> |
| <feFuncB type="discrete" tableValues="0"/> |
| <feFuncA type="discrete" tableValues="0 1 0"/> |
| </feComponentTransfer> |
| </filter> |
| |
| <!-- type=turbulence --> |
| <filter id="tb1" x="0" y="0" width="1" height="1"> |
| <feTurbulence type="turbulence" baseFrequency="-1 1"/> |
| <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="tb2" x="0" y="0" width="1" height="1"> |
| <feTurbulence type="turbulence" baseFrequency="1 -1"/> |
| <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> |
