Support 'color-interpolation: linearrgb' on SVG gradients

[fsoder]

WebKittens

@weinig

Title of the spec

Scalable Vector Graphics 2 (or 1.1 or 1.1SE)

URL to the spec

https://svgwg.org/svg2-draft/painting.html#ColorInterpolation

URL to the spec's repository

https://github.com/w3c/svgwg/

Issue Tracker URL

No response

Explainer URL

No response

TAG Design Review URL

No response

Mozilla standards-positions issue URL

No response

WebKit Bugzilla URL

https://bugs.webkit.org/show_bug.cgi?id=234783

Radar URL

No response

Description

Enables interpolation of SVG gradients in a linear-light sRGB colorspace.

Shipped in Firefox 123 (https://www.mozilla.org/en-US/firefox/123.0/releasenotes)

[annevk]

I don't see an immediate problem with this, but I thought that the SVG2 effort would largely focus on interoperability among the existing features, but it seems we're also adding features again?

[astearns]

@annevk The maintenance SVG WG has not yet started. Looking at blame for that section it appears to have not been modified in the last six years.