the preserveAlpha
attribute indicates how a <feConvolveMatrix>
element handles alpha transparency.
You can use this attribute with the following SVG elements:
the preserveAlpha
attribute indicates how a <feConvolveMatrix>
element handles alpha transparency.
You can use this attribute with the following SVG elements:
<svg viewBox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="convolveMatrix1" x="0" y="0" width="100%" height="100%"> <feConvolveMatrix kernelMatrix="1 -1 2 0 0 0 0 0 -2" preserveAlpha="true" /> </filter> <filter id="convolveMatrix2" x="0" y="0" width="100%" height="100%"> <feConvolveMatrix kernelMatrix="1 -1 2 0 0 0 0 0 -2" preserveAlpha="false" /> </filter> <image xlink:href="mdn_logo_only_color.png" width="200" height="200" style="filter:url(#convolveMatrix1);" /> <image xlink:href="mdn_logo_only_color.png" width="200" height="200" style="filter:url(#convolveMatrix2); transform:translateX(220px);" /> </svg>
Default value | false |
---|---|
Value |
true | false
|
Animatable | Yes |
true
This value indicates that the convolution is applied only to the color channels. In this case, the filter temporarily removes alpha premultiplication from the color component values, applies the kernel, and then reapplies alpha premultiplication as a final step.
false
This value indicates that the convolution is applied to all channels, including the alpha channel.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
preserveAlpha |
No | No | No | No | No | No | No | No | No | No | No | No |
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https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/preserveAlpha