Beispiel:SVG-Filter-01-Blend.html

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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <link rel="stylesheet" media="screen" href="./Beispiel:SELFHTML-Beispiel-Grundlayout.css">
  <style>
    svg {
      width: 96%;
      padding:0;
      margin:0;
      background: white;
    }
  </style>
  <title>SVG-Urfilter: feBlend</title>
</head>
 
<body>
  <h1>SVG-Urfilter: feBlend</h1>
 
<svg viewBox="0 0 780 500" >
<defs>
  <symbol id="kreis">
    <circle  cx="50" cy="50" r="50" fill="#3983ab" ></circle>
  </symbol>	
  <symbol id="viereck">
    <rect x="0" y="0" width="100" height="100" fill="#dfac20" />
  </symbol>
  <symbol id="rastergrafik">
    <image x="0" y="0" width="100px" height="100px"
    href="http://wiki.selfhtml.org/images/a/a6/Lauf-1.jpg">
  </symbol>

<!-- 5 Filter mit feBlend und feTurbulence -->
    <filter id="blend0">
      <feTurbulence in="SourceGraphic"
         baseFrequency=".2" type="fractalNoise"
         />
    </filter>
    <filter id="blend1">
      <feTurbulence in="SourceGraphic"
         baseFrequency=".2" type="fractalNoise"
        result="out1" />
      <feBlend in="SourceGraphic" in2="out1"
        mode="normal" />
    </filter>
    <filter id="blend2">
      <feTurbulence in="SourceGraphic"
        baseFrequency=".2" type="fractalNoise"
        result="out1" />
      <feBlend in="SourceGraphic" in2="out1"
        mode="screen" />
    </filter>
    <filter id="blend3">
      <feTurbulence in="SourceGraphic"
        baseFrequency=".2" type="fractalNoise"
        result="out1" />
      <feBlend in="SourceGraphic" in2="out1"
        mode="darken" />
    </filter>
    <filter id="blend4">
      <feTurbulence in="SourceGraphic"
        baseFrequency=".2" type="fractalNoise"
        result="out1" />
      <feBlend in="SourceGraphic" in2="out1"
        mode="lighten" />
    </filter>
    <filter id="blend5">
      <feTurbulence in="SourceGraphic"
        baseFrequency=".2" type="fractalNoise"
        result="out1" />
      <feBlend in="SourceGraphic" in2="out1"
        mode="multiply" />
    </filter>

</defs>

  <rect width="100" height="100" Y="50"
        transform="translate(0,0)"
           filter="url(#blend0)" 
  />

  <!-- mode="normal" -->
  <text  x="130" y="22">normal</text>
  <use href="#kreis"
        transform="translate(130,50)"
           filter="url(#blend1)" 
  />
  <use href="#viereck"
        transform="translate(130,200)"
           filter="url(#blend1)" 
  />
    <use href="#rastergrafik"
        transform="translate(130,350)"
           filter="url(#blend1)" 
  />
 
  <!-- mode="screen" -->
  <text  x="260" y="22">screen</text>
  <use href="#kreis"
        transform="translate(260,50)"
           filter="url(#blend2)" 
  />
  <use href="#viereck"
        transform="translate(260,200)"
           filter="url(#blend2)" 
  />
    <use href="#rastergrafik"
        transform="translate(260,350)"
           filter="url(#blend2)" 
  />
 
  <!-- mode="darken" -->
  <text  x="390" y="22">darken</text>
  <use href="#kreis"
        transform="translate(390,50)"
           filter="url(#blend3)" 
  />
  <use href="#viereck"
        transform="translate(390,200)"
           filter="url(#blend3)" 
  />
  <use href="#rastergrafik"
        transform="translate(390,350)"
           filter="url(#blend3)" 
  />
  <!-- mode="lighten" -->
  <text  x="520" y="22">lighten</text>
  <use href="#kreis"
        transform="translate(520,50)"
           filter="url(#blend4)" 
  />
  <use href="#viereck"
        transform="translate(520,200)"
           filter="url(#blend4)" 
  />
  <use href="#rastergrafik"
        transform="translate(520,350)"
           filter="url(#blend4)" 
  />
  
    <!--mode="multiply" -->
  <text  x="650" y="22">multiply</text>
  <use href="#kreis"
        transform="translate(650,50)"
           filter="url(#blend5)" 
  />
  <use href="#viereck"
        transform="translate(650,200)"
           filter="url(#blend5)" 
  />
  <use href="#rastergrafik"
        transform="translate(650,350)"
           filter="url(#blend5)" 
  />
 
</svg>

<p>Mit dem Urfilter <code>feTurbulence</code> wird eine wolkenähnliche Textur erzeugt.</p>
<p>Diese wird dann mit dem feBlend-Filter mit den Eingangsgrafiken (blauer Kreis, gelbes Quadrat, Rastergrafik) zusammengelegt.</p>
</body>
</html>
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