We need generalized 4x4 matrices to cover additional colorspaces besides BT.601 and BT.709.
Pull request: https://github.com/WebKit/WebKit/pull/1048
Committed r294935 (251046@main): <https://commits.webkit.org/251046@main> Reviewed commits have been landed. Closing PR #1048 and removing active labels.
<rdar://problem/94027204>