<feDiffuseLighting>

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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

CategoriesFilter primitive element
Permitted contentAny 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

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

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) 20 or earlier (12.10049) (Yes) (Yes) (Yes) ?
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support ? ? ? ? ?

See also

Etiquetas do documento e colaboradores

 Colaboradores desta página: Sebastianz, kscarfone, Jeremie, Manuel_Strehl
 Última atualização por: Sebastianz,