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Connect to ClutterStage::after-paint with connect_after()

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Use connect_after() to accomodate code in GNOME Shell that,
when benchmarking drawing performance, connects to ::after-paint
and calls glFinish(). The timing information from that will be
more accurate if we hold off until that completes before we signal
apps to begin drawing the next frame. If there are no other
connections to ::after-paint, connect() vs. connect_after() doesn't
matter.

https://bugzilla.gnome.org/show_bug.cgi?id=732350
This commit is contained in:
Owen W. Taylor 2014-07-16 10:41:48 -04:00
parent 3de40434fa
commit 182a267f69
1 changed files with 10 additions and 2 deletions
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12
src/compositor/compositor.c
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@ -507,8 +507,16 @@ meta_compositor_manage (MetaCompositor *compositor)
}
}
g_signal_connect (CLUTTER_STAGE (compositor->stage), "after-paint",
G_CALLBACK (after_stage_paint), compositor);
/* We use connect_after() here to accomodate code in GNOME Shell that,
* when benchmarking drawing performance, connects to ::after-paint
* and calls glFinish(). The timing information from that will be
* more accurate if we hold off until that completes before we signal
* apps to begin drawing the next frame. If there are no other
* connections to ::after-paint, connect() vs. connect_after() doesn't
* matter.
*/
g_signal_connect_after (CLUTTER_STAGE (compositor->stage), "after-paint",
G_CALLBACK (after_stage_paint), compositor);
clutter_stage_set_sync_delay (CLUTTER_STAGE (compositor->stage), META_SYNC_DELAY);