Use EGL_ANGLE_surface_orientation in Chrome to avoid a blit.

Use EGL_ANGLE_surface_orientation in Chrome to avoid a blit.

With EGL_ANGLE_surface_orientation, Chrome can set EGL_SURFACE_ORIENTATION_INVERT_Y_ANGLE on the backbuffer and flip the drawing of the backbuffer itself. This avoids a blit inside ANGLE, which reduces power consumption from 6.4W to 6.0W on a fullscreen h.264 video in my testing.

A new gpu capability is added to inform the compositor that a flip is needed.

BUG=525379
Committed: https://crrev.com/21e38674f87492aa0ecb54a97df709ecd8b05feb
Cr-Commit-Position: refs/heads/master@{#367700}

[jbauman, 2016-01-05 01:05:44]

jbauman@chromium.org changed reviewers:
+ dcheng@chromium.org, piman@chromium.org

[jbauman, 2016-01-05 01:05:45]

piman@: please review

dcheng@: minor gpu\ipc\gpu_command_buffer_traits_multi.h change

[piman, 2016-01-05 01:20:05]

LGTM, though please double-check that things like casting and screenshots still
work correctly. I'm not sure if EGL_ANGLE_surface_orientation means "render
upside down" or "display upside down" (implications wrt glReadPixels or
glCopyTexImage2D for example).

[dcheng, 2016-01-05 01:36:56]

lgtm for ipc changes

[jbauman, 2016-01-05 23:39:51]

The CQ bit was checked by jbauman@chromium.org

[commit-bot: I haz the power, 2016-01-05 23:42:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1560523002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1560523002/20001

[commit-bot: I haz the power, 2016-01-05 23:49:54]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-01-05 23:50:42]

Description was changed from

==========
Use EGL_ANGLE_surface_orientation in Chrome to avoid a blit.

With EGL_ANGLE_surface_orientation, Chrome can set
EGL_SURFACE_ORIENTATION_INVERT_Y_ANGLE on the backbuffer and flip the drawing of
the backbuffer itself. This avoids a blit inside ANGLE, which reduces power
consumption from 6.4W to 6.0W on a fullscreen h.264 video in my testing.

A new gpu capability is added to inform the compositor that a flip is needed.

BUG=525379
==========

to

==========
Use EGL_ANGLE_surface_orientation in Chrome to avoid a blit.

With EGL_ANGLE_surface_orientation, Chrome can set
EGL_SURFACE_ORIENTATION_INVERT_Y_ANGLE on the backbuffer and flip the drawing of
the backbuffer itself. This avoids a blit inside ANGLE, which reduces power
consumption from 6.4W to 6.0W on a fullscreen h.264 video in my testing.

A new gpu capability is added to inform the compositor that a flip is needed.

BUG=525379

Committed: https://crrev.com/21e38674f87492aa0ecb54a97df709ecd8b05feb
Cr-Commit-Position: refs/heads/master@{#367700}
==========

[commit-bot: I haz the power, 2016-01-05 23:50:43]

Patchset 2 (id:??) landed as
https://crrev.com/21e38674f87492aa0ecb54a97df709ecd8b05feb
Cr-Commit-Position: refs/heads/master@{#367700}