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/SVG

<feDiffuseLighting>

The <feDiffuseLighting> SVG filter primitive lights an image using the alpha channel as a bump map. The resulting image, which is an RGBA opaque image, depends on the light color, light position and surface geometry of the input bump map.

The light map produced by this filter primitive can be combined with a texture image using the multiply term of the arithmetic operator of the <feComposite> filter primitive. Multiple light sources can be simulated by adding several of these light maps together before applying it to the texture image.

Usage context

Categories Filter primitive element
Permitted content Any number of descriptive elements and exactly one light source element, in any order.

Attributes

Global attributes

Specific attributes

DOM Interface

This element implements the SVGFEDiffuseLightingElement interface.

Example

The following example show the effect of the <feDiffuseLighting> element on a circle with each light source available. Each time, the light comes from the upper left corner.

<svg width="440" height="140" xmlns="http://www.w3.org/2000/svg">
  <!-- No light is applied -->
  <text text-anchor="middle" x="60" y="22">No Light</text>
  <circle cx="60" cy="80" r="50" fill="green" />

  <!-- the light source is a fePointLight element -->
  <text text-anchor="middle" x="170" y="22">fePointLight</text>
  <filter id="lightMe1">
    <feDiffuseLighting in="SourceGraphic" result="light" lighting-color="white">
      <fePointLight x="150" y="60" z="20" />
    </feDiffuseLighting>

    <feComposite
      in="SourceGraphic"
      in2="light"
      operator="arithmetic"
      k1="1"
      k2="0"
      k3="0"
      k4="0" />
  </filter>

  <circle cx="170" cy="80" r="50" fill="green" filter="url(#lightMe1)" />

  <!-- the light source is a feDistantLight element -->
  <text text-anchor="middle" x="280" y="22">feDistantLight</text>
  <filter id="lightMe2">
    <feDiffuseLighting in="SourceGraphic" result="light" lighting-color="white">
      <feDistantLight azimuth="240" elevation="20" />
    </feDiffuseLighting>

    <feComposite
      in="SourceGraphic"
      in2="light"
      operator="arithmetic"
      k1="1"
      k2="0"
      k3="0"
      k4="0" />
  </filter>

  <circle cx="280" cy="80" r="50" fill="green" filter="url(#lightMe2)" />

  <!-- the light source is a feSpotLight source -->
  <text text-anchor="middle" x="390" y="22">feSpotLight</text>
  <filter id="lightMe3">
    <feDiffuseLighting in="SourceGraphic" result="light" lighting-color="white">
      <feSpotLight
        x="360"
        y="5"
        z="30"
        limitingConeAngle="20"
        pointsAtX="390"
        pointsAtY="80"
        pointsAtZ="0" />
    </feDiffuseLighting>

    <feComposite
      in="SourceGraphic"
      in2="light"
      operator="arithmetic"
      k1="1"
      k2="0"
      k3="0"
      k4="0" />
  </filter>

  <circle cx="390" cy="80" r="50" fill="green" filter="url(#lightMe3)" />
</svg>

Expected rendering:

Expected rendering for the example

Live rendering:

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
feDiffuseLighting Yes 12 Yes Yes Yes No Yes Yes Yes No No Yes
diffuseConstant No No No No No No No No No No No No
in Yes 12 Yes Yes Yes No Yes Yes Yes No No Yes
kernelUnitLength No No No No No No No No No No No No
surfaceScale No No No No No No No No No No No No

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/SVG/Element/feDiffuseLighting