- From: Karl Dubost via GitHub <noreply@w3.org>
- Date: Wed, 07 Jan 2026 03:20:50 +0000
- To: public-svg-issues@w3.org
`feComposite` is now being handled by the css wg. https://drafts.fxtf.org/filter-effects/#feCompositeElement `operator="arithmetic"` https://drafts.csswg.org/filter-effects-1/#element-attrdef-fecomposite-operator > The compositing operation that is to be performed. All of the [operator](https://drafts.csswg.org/filter-effects-1/#element-attrdef-fecomposite-operator) types except arithmetic match the corresponding operation as described in [[COMPOSITING-1]](https://drafts.csswg.org/filter-effects-1/#biblio-compositing-1) with [in](https://drafts.csswg.org/filter-effects-1/#element-attrdef-filter-primitive-in) representing the source and [in2](https://drafts.csswg.org/filter-effects-1/#element-attrdef-fecomposite-in2) representing the destination. The arithmetic operator is described above. > > The [initial value](https://svgwg.org/svg2-draft/types.html#TermInitialValue) for [operator](https://drafts.csswg.org/filter-effects-1/#element-attrdef-fecomposite-operator) is [over](https://drafts.csswg.org/filter-effects-1/#attr-valuedef-fecomposite-operator-over). The above definition is: >If the arithmetic operation is chosen, each result pixel is computed using the following formula: > > result = k1*i1*i2 + k2*i1 + k3*i2 + k4 > where: > > i1 and i2 indicate the corresponding pixel channel values of the input image, which map to [in](https://drafts.csswg.org/filter-effects-1/#element-attrdef-filter-primitive-in) and [in2](https://drafts.csswg.org/filter-effects-1/#element-attrdef-fecomposite-in2) respectively k1, k2, k3 and k4 indicate the values of the attributes with the same name @fantasai @smfr should this be handled in discussions by the CSS WG? -- GitHub Notification of comment by karlcow Please view or discuss this issue at https://github.com/w3c/svgwg/issues/1046#issuecomment-3717167377 using your GitHub account -- Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-config
Received on Wednesday, 7 January 2026 03:20:50 UTC