feTurbulence-zero-baseFreq-01.svg

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<!--

     Any copyright is dedicated to the Public Domain.

     http://creativecommons.org/publicdomain/zero/1.0/

-->

<!--

     This test verifies that feTurbulence with baseFrequency="0" creates

     a transparent black result for type="turbulence" and a 50% alpha

     50% gray result for type="fractalNoise".

-->

<svg xmlns="http://www.w3.org/2000/svg">

  <filter id="filterTurbulence" primitiveUnits="objectBoundingBox" color-interpolation-filters="sRGB">

    <feTurbulence type="turbulence" baseFrequency="0" numOctaves="1"

                  x="0%" y="0%" width="100%" height="100%"/>

  </filter>

  <filter id="filterFractalNoise" primitiveUnits="objectBoundingBox" color-interpolation-filters="sRGB">

    <feTurbulence type="fractalNoise" baseFrequency="0" numOctaves="1"

                  x="0%" y="0%" width="100%" height="100%"/>

  </filter>

  <rect x="0" y="0" width="400" height="100" fill="blue"/>

  <rect x="0" y="100" width="400" height="100" fill="lime"/>

  <rect x="50" y="50" width="100" height="100" filter="url(#filterTurbulence)"/>

  <rect x="200" y="50" width="100" height="100" filter="url(#filterFractalNoise)"/>

</svg>