surfaceScale - SVG: Scalable Vector Graphics 编辑

The surfaceScale attribute represents the height of the surface for a light filter primitive.

Two elements are using this attribute: <feDiffuseLighting> and <feSpecularLighting>

html, body, svg {
  height: 100%;
}

<svg viewBox="0 0 420 200" xmlns="http://www.w3.org/2000/svg">
  <filter id="diffuseLighting1" x="0" y="0" width="100%" height="100%">
    <feDiffuseLighting in="SourceGraphic" surfaceScale="1">
      <fePointLight x="60" y="60" z="20" />
    </feDiffuseLighting>
  </filter>
  <filter id="diffuseLighting2" x="0" y="0" width="100%" height="100%">
    <feDiffuseLighting in="SourceGraphic" surfaceScale="15">
      <fePointLight x="60" y="60" z="20" />
    </feDiffuseLighting>
  </filter>

  <rect x="0" y="0" width="200" height="200" style="filter: url(#diffuseLighting1);" />
  <rect x="0" y="0" width="200" height="200" style="filter: url(#diffuseLighting2); transform: translateX(220px);" />
</svg>

feSpecularLighting

For <feSpecularLighting>, surfaceScale defines the height of the surface.

feDiffuseLighting

For <feDiffuseLighting>, surfaceScale defines the height of the surface.

Specifications

See also

• Description of Phong reflection model on Wikipedia