second-filter-uses-SourceAlpha.svg

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<!--

     Any copyright is dedicated to the Public Domain.

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

-->

<svg id="svg-root"

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

  xmlns:xlink="http://www.w3.org/1999/xlink">

  <g id="testmeta">

    <title>SVG Filter Chains: Second Filter Uses SourceAlpha</title>

    <link rel="copyright"

          href="http://www.w3.org/Graphics/SVG/Test/Copyright"/>

    <link rel="license"

          href="http://www.w3.org/Consortium/Legal/2008/03-bsd-license.html"/>

    <link rel="author"

          title="Max Vujovic"

          href="mailto:mvujovic@adobe.com"/>

    <link rel="help"

          href="http://dev.w3.org/fxtf/filters/#FilterPrimitiveSubRegion"/>

    <link rel="match"

          href="second-filter-uses-SourceAlpha.svg" />

    <metadata class="flags">namespace svg</metadata>

    <desc class="assert">

      In an SVG filter chain, this test verifies that a filter receives the

      correct SourceAlpha input from the previous filter in the chain. If the

      test passes, you should see a blurred green square.

    </desc>

  </g>

  <g id="test-body-content">

    <filter id="blur">

      <feGaussianBlur stdDeviation="3"/>

    </filter>

    <filter id="add-green">

      <!--

        This filter receives transparent black and the alpha channel of the

        previous blur filter. Then, it adds to the green channel where the alpha

        channel is set, resulting in a blurred green square.

-->

      <feComponentTransfer in="SourceAlpha">

        <feFuncR type="identity"/>

        <feFuncG type="table" tableValues="1 1"/>

        <feFuncB type="identity"/>

        <feFuncA type="identity"/>

      </feComponentTransfer>

    </filter>

    <rect x="100" y="100" width="100" height="100" filter="url(#blur) url(#add-green)" fill="red"/>

  </g>

</svg>