These need to be used both in FilterEffectsRenderer and PlatformCALayer, so they should be in a header (I suggest FilterOperation.h) and we should reference the SVG spec from whence they came: https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html
Pull request: https://github.com/WebKit/WebKit/pull/4222
Committed 254358@main (17983d2e7c64): <https://commits.webkit.org/254358@main> Reviewed commits have been landed. Closing PR #4222 and removing active labels.
<rdar://problem/99784951>