<feDisplacementMap> - SVG: Scalable Vector Graphics 编辑

The <feDisplacementMap> SVG filter primitive uses the pixel values from the image from in2 to spatially displace the image from in.

The formula for the transformation looks like this:

P'(x,y) ← P( x + scale * (XC(x,y) - 0.5), y + scale * (YC(x,y) - 0.5))

where P(x,y) is the input image, in, and P'(x,y) is the destination. XC(x,y) and YC(x,y) are the component values of the channel designated by xChannelSelector and yChannelSelector.

Usage context

Attributes

Global attributes

• Core attributes
• Presentation attributes
• Filter primitive attributes
• class
• style

Specific attributes

• in
• in2
• scale
• xChannelSelector
• yChannelSelector

DOM Interface

This element implements the SVGFEDisplacementMapElement interface.

Example

<svg width="200" height="200" viewBox="0 0 220 220"
     xmlns="http://www.w3.org/2000/svg">
  <filter id="displacementFilter">
    <feTurbulence type="turbulence" baseFrequency="0.05"
        numOctaves="2" result="turbulence"/>
    <feDisplacementMap in2="turbulence" in="SourceGraphic"
        scale="50" xChannelSelector="R" yChannelSelector="G"/>
  </filter>

  <circle cx="100" cy="100" r="100"
      style="filter: url(#displacementFilter)"/>
</svg>

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• <filter>
• <animate>
• <set>
• <feBlend>
• <feColorMatrix>
• <feComponentTransfer>
• <feComposite>
• <feConvolveMatrix>
• <feDiffuseLighting>
• <feFlood>
• <feGaussianBlur>
• <feImage>
• <feMerge>
• <feMorphology>
• <feOffset>
• <feSpecularLighting>
• <feTile>
• <feTurbulence>
• SVG tutorial: Filter effects