W3cubDocs

/SVG

<feSpecularLighting>

The <feSpecularLighting> SVG filter primitive lights a source graphic using the alpha channel as a bump map. The resulting image is an RGBA image based on the light color. The lighting calculation follows the standard specular component of the Phong lighting model. The resulting image depends on the light color, light position and surface geometry of the input bump map. The result of the lighting calculation is added. The filter primitive assumes that the viewer is at infinity in the z direction.

This filter primitive produces an image which contains the specular reflection part of the lighting calculation. Such a map is intended to be combined with a texture using the add term of the arithmetic <feComposite> method. Multiple light sources can be simulated by adding several of these light maps before applying it to the texture image.

Usage context

Categories Filter primitive element
Permitted content Exactly one light source element first and any number of descriptive elements in any order.

Attributes

Global attributes

Specific attributes

DOM Interface

This element implements the SVGFESpecularLightingElement interface.

Example

<svg
  height="200"
  width="200"
  viewBox="0 0 220 220"
  xmlns="http://www.w3.org/2000/svg">
  <filter id="filter">
    <feSpecularLighting
      result="specOut"
      specularExponent="20"
      lighting-color="#bbbbbb">
      <fePointLight x="50" y="75" z="200" />
    </feSpecularLighting>
    <feComposite
      in="SourceGraphic"
      in2="specOut"
      operator="arithmetic"
      k1="0"
      k2="1"
      k3="1"
      k4="0" />
  </filter>
  <circle cx="110" cy="110" r="100" style="filter:url(#filter)" />
</svg>

Result

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
feSpecularLighting Yes 12 4 Yes 9 No Yes Yes Yes No No Yes
in Yes 12 4 Yes 9 No Yes Yes Yes No No Yes
kernelUnitLength No No No No No No No No No No No No
specularConstant Yes 12 4 Yes 9 No Yes Yes Yes No No Yes
specularExponent Yes 12 4 Yes 9 No Yes Yes Yes No No Yes
surfaceScale No No No No No No No No No No No No

See also

© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/SVG/Element/feSpecularLighting