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<body><span class="vcard"><a href="page.cgi?id=describeuser.html&login=ebassi%40gmail.com" title="Emmanuele Bassi (:ebassi) <ebassi@gmail.com>"> <span class="fn">Emmanuele Bassi (:ebassi)</span></a>
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<a class="bz_bug_link
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title="NEW - drawing performance worse than X"
href="https://bugzilla.gnome.org/show_bug.cgi?id=763350">bug 763350</a>
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - drawing performance worse than X"
href="https://bugzilla.gnome.org/show_bug.cgi?id=763350#c16">Comment # 16</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - drawing performance worse than X"
href="https://bugzilla.gnome.org/show_bug.cgi?id=763350">bug 763350</a>
from <span class="vcard"><a href="page.cgi?id=describeuser.html&login=ebassi%40gmail.com" title="Emmanuele Bassi (:ebassi) <ebassi@gmail.com>"> <span class="fn">Emmanuele Bassi (:ebassi)</span></a>
</span></b>
<pre>(In reply to Christian Hergert from <a href="show_bug.cgi?id=763350#c15">comment #15</a>)
<span class="quote">> cogl-winsys-egl-kms.c specifies a page_flip drm event handler, but not
> vblank_handler (which is what weston uses).
>
> Even if we add this handler, I'm not sure we have the proper API to
> propagate it in the same fashion back to the calling API in Mutter (who is
> waiting for callbacks via the CoglOnscreen).</span >
The usual way to achieve this is to populate the CoglFrameInfo on page flip;
the frame info timing can then be used by higher layers, like Mutter. This is
what already happens with Cogl using the GLX winsys.</pre>
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