Created attachment 449001 [details] test case Open the attached test case and compare the result of applying the css filter function versus applying the referenced SVG filter.
Created attachment 449021 [details] Patch
Created attachment 449027 [details] Patch
Created attachment 449035 [details] Patch
Created attachment 449038 [details] Patch
Committed r287982 (246011@main): <https://commits.webkit.org/246011@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 449038 [details].
<rdar://problem/87559992>