k1

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.

Thek1 attribute defines one of the values to be used within thearithmetic operation of the<feComposite> filter primitive.

The pixel composition is computed using the following formula:

result = k1 * i1 * i2 + k2 * i1 + k3 * i2 + k4;

You can use this attribute with the following SVG elements:

<feComposite>

Example

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

html

<svg viewBox="0 0 420 200" xmlns="http://www.w3.org/2000/svg">  <filter x="0" y="0" width="100%" height="100%">    <feComposite      in2="SourceGraphic"      operator="arithmetic"      k1="1"      k2="0"      k3="0"      k4="0" />  </filter>  <filter x="0" y="0" width="100%" height="100%">    <feComposite      in2="SourceGraphic"      operator="arithmetic"      k1="10"      k2="0"      k3="0"      k4="0" />  </filter>  <image    href="mdn.svg"    x="0"    y="0"    width="200"    height="200"    filter="url(#composite1)" />  <image    href="mdn.svg"    x="220"    y="0"    width="200"    height="200"    filter="url(#composite2)" /></svg>