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<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 compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
feDiffuseLighting Yes 12 Yes Yes Yes ?
diffuseConstant ? ? ? ? ? ?
in Yes 12 Yes Yes Yes ?
kernelUnitLength ? ? ? ? ? ?
surfaceScale ? ? ? ? ? ?
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
feDiffuseLighting Yes Yes Yes ? ? Yes
diffuseConstant ? ? ? ? ? ?
in Yes Yes Yes ? ? Yes
kernelUnitLength ? ? ? ? ? ?
surfaceScale ? ? ? ? ? ?

See also

© 2005–2020 Mozilla and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/SVG/Element/feDiffuseLighting