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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - [css-filters-2] Parent stacking context of backdrop-filter needs to isolate itself"
href="https://bugs.webkit.org/show_bug.cgi?id=162760#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - [css-filters-2] Parent stacking context of backdrop-filter needs to isolate itself"
href="https://bugs.webkit.org/show_bug.cgi?id=162760">bug 162760</a>
from <span class="vcard"><a class="email" href="mailto:trchen@chromium.org" title="Tien-Ren Chen <trchen@chromium.org>"> <span class="fn">Tien-Ren Chen</span></a>
</span></b>
<pre>But that would be undefined if the backdrop-filter element is inside of an open group effect. I saw a proposal somewhere that in such case we treat parent effects to be no-op and replace special blending with src-over when we draw the backdrop.
So for example:
A + opacity(B + C) * opacity(D + E + Backdrop + F + G)
Where '+' denotes src-over and '*' denotes some special blending. The backdrop will be resolved as:
A + opacity(B + C) + D + E
Is that what we intended to implement and make into the spec?</pre>
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