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<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

Specification	Status	Comment
Filter Effects Module Level 1 The definition of '<feSpecularLighting>' in that specification.	Working Draft	Removed limitation of `specularExponent` attribute.
Scalable Vector Graphics (SVG) 1.1 (Second Edition) The definition of '<feSpecularLighting>' in that specification.	Recommendation	Initial definition

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	Yes	Yes	4	Yes	9	?
`in`	Yes	Yes	4	Yes	9	?
`kernelUnitLength`	?	?	?	?	?	?
`specularConstant`	Yes	Yes	4	Yes	9	?
`specularExponent`	Yes	Yes	4	Yes	9	?
`surfaceScale`	?	?	?	?	?	?

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	?	Yes	Yes	Yes	?	?	?
`in`	?	Yes	Yes	Yes	?	?	?
`kernelUnitLength`	?	?	?	?	?	?	?
`specularConstant`	?	Yes	Yes	Yes	?	?	?
`specularExponent`	?	Yes	Yes	Yes	?	?	?
`surfaceScale`	?	?	?	?	?	?	?