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<body><span class="vcard"><a class="email" href="mailto:simon.fraser@apple.com" title="Simon Fraser (smfr) <simon.fraser@apple.com>"> <span class="fn">Simon Fraser (smfr)</span></a>
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<a class="bz_bug_link
bz_status_NEW "
title="NEW - backface-visibility style not applied when printing"
href="https://bugs.webkit.org/show_bug.cgi?id=160860">bug 160860</a>
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<td style="text-align:right;">Attachment #287011 Flags</td>
<td>review?
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<td>review-
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - backface-visibility style not applied when printing"
href="https://bugs.webkit.org/show_bug.cgi?id=160860#c4">Comment # 4</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - backface-visibility style not applied when printing"
href="https://bugs.webkit.org/show_bug.cgi?id=160860">bug 160860</a>
from <span class="vcard"><a class="email" href="mailto:simon.fraser@apple.com" title="Simon Fraser (smfr) <simon.fraser@apple.com>"> <span class="fn">Simon Fraser (smfr)</span></a>
</span></b>
<pre>Comment on <span class=""><a href="attachment.cgi?id=287011&action=diff" name="attach_287011" title="Patch">attachment 287011</a> <a href="attachment.cgi?id=287011&action=edit" title="Patch">[details]</a></span>
Patch
Good investigation, but this isn't quite correct. Backface visibility needs to be computed relative to the ancestor most non-preserve3D layer (the spec at <a href="https://drafts.csswg.org/css-transforms/">https://drafts.csswg.org/css-transforms/</a> talks about this in terms of "3d rendering contexts").
For testing I think we have a way to do printing tests (see LayoutTests/printing).</pre>
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