exo: Connect frame callbacks with UI compositor begin frames.

exo: Connect frame callbacks with UI compositor begin frames.

Frame callbacks are used by simple wayland clients to drive
animations and provide back-pressure when producing frames.

This makes use of begin frame callbacks and the frame timestamps
they provide instead of having these callbacks fire at "WillDraw"
time using the current time.

The result is better timestamps for animations and frames that
are better aligned with UI compositor drawing.

BUG=661010
TEST=wayland-motion-events

Committed: https://crrev.com/15aee286dd3b89eb397ff75eda58eafdaf9ad6fd
Cr-Commit-Position: refs/heads/master@{#429968}

[reveman, 2016-11-04 16:38:53]

reveman@chromium.org changed reviewers:
+ dcastagna@chromium.org

[Daniele Castagna, 2016-11-04 18:09:58]

lgtm

[Daniele Castagna, 2016-11-04 18:10:22]

On 2016/11/04 at 18:09:58, Daniele Castagna wrote:
> lgtm

Can you open a bug for the latency measurements and mention it in the CL
description?

[reveman, 2016-11-04 18:11:29]

Description was changed from

==========
exo: Connect frame callbacks with UI compositor begin frames.

Frame callbacks are used by simple wayland clients to drive
animations and provide back-pressure when producing frames.

This makes use of begin frame callbacks and the frame timestamps
they provide instead of having these callbacks fire at "WillDraw"
time using the current time.

The result is better timestamps for animations and frames that
are better aligned with UI compositor drawing.

BUG=
TEST=wayland-motion-events
==========

to

==========
exo: Connect frame callbacks with UI compositor begin frames.

Frame callbacks are used by simple wayland clients to drive
animations and provide back-pressure when producing frames.

This makes use of begin frame callbacks and the frame timestamps
they provide instead of having these callbacks fire at "WillDraw"
time using the current time.

The result is better timestamps for animations and frames that
are better aligned with UI compositor drawing.

BUG=661010
TEST=wayland-motion-events
==========

[reveman, 2016-11-04 18:12:12]

On 2016/11/04 at 18:10:22, dcastagna wrote:
> On 2016/11/04 at 18:09:58, Daniele Castagna wrote:
> > lgtm
> 
> Can you open a bug for the latency measurements and mention it in the CL
description?

Using the bug for the output surface snaphots.

[reveman, 2016-11-04 18:12:36]

The CQ bit was checked by reveman@chromium.org

[commit-bot: I haz the power, 2016-11-04 18:13:18]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-04 19:09:47]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-04 19:18:45]

Description was changed from

==========
exo: Connect frame callbacks with UI compositor begin frames.

Frame callbacks are used by simple wayland clients to drive
animations and provide back-pressure when producing frames.

This makes use of begin frame callbacks and the frame timestamps
they provide instead of having these callbacks fire at "WillDraw"
time using the current time.

The result is better timestamps for animations and frames that
are better aligned with UI compositor drawing.

BUG=661010
TEST=wayland-motion-events
==========

to

==========
exo: Connect frame callbacks with UI compositor begin frames.

Frame callbacks are used by simple wayland clients to drive
animations and provide back-pressure when producing frames.

This makes use of begin frame callbacks and the frame timestamps
they provide instead of having these callbacks fire at "WillDraw"
time using the current time.

The result is better timestamps for animations and frames that
are better aligned with UI compositor drawing.

BUG=661010
TEST=wayland-motion-events

Committed: https://crrev.com/15aee286dd3b89eb397ff75eda58eafdaf9ad6fd
Cr-Commit-Position: refs/heads/master@{#429968}
==========

[commit-bot: I haz the power, 2016-11-04 19:18:45]

Patchset 1 (id:??) landed as
https://crrev.com/15aee286dd3b89eb397ff75eda58eafdaf9ad6fd
Cr-Commit-Position: refs/heads/master@{#429968}