Split picture layer quads to allow removing more occluded area.

Split picture layer quads to allow removing more occluded area.

With GPU rasterization tiles are much larger, so occlusion culling is
not nearly as effective because it's easy for occluding content to cover
only a portion of a tile. If we break up tiles into multiple quads then
much larger regions can be omitted.

BUG=526322, 276069
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

[jbauman, 2016-10-08 00:52:07]

Description was changed from

==========
Split picture layer quads to allow removing more occluded area.

With GPU rasterization tiles are much larger, so occlusion culling is
not nearly as effective because it's easy for occluding content to cover
only a portion of a tile. If we break up tiles into multiple quads then
much larger regions can be omitted.

BUG=526322,276069
==========

to

==========
Split picture layer quads to allow removing more occluded area.

With GPU rasterization tiles are much larger, so occlusion culling is
not nearly as effective because it's easy for occluding content to cover
only a portion of a tile. If we break up tiles into multiple quads then
much larger regions can be omitted.

BUG=526322,276069
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel
==========

[jbauman, 2016-10-08 00:52:13]

The CQ bit was checked by jbauman@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-10-08 00:52:52]

Dry run: 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, 2016-10-08 02:10:35]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-10-08 02:10:36]

Dry run: Try jobs failed on following builders:
  linux_precise_blink_rel on master.tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/linux_precise_blink_rel/...)

[jbauman, 2016-10-10 21:32:14]

CL for src perf tryjob to run smoothness.top_25_smooth benchmark on winx64-zen
platform(s)

[jbauman, 2016-10-11 22:10:01]

The CQ bit was checked by jbauman@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-10-11 22:10:17]

Dry run: 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, 2016-10-12 00:32:31]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-10-12 00:32:32]

Dry run: Try jobs failed on following builders:
  linux_precise_blink_rel on master.tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/linux_precise_blink_rel/...)

[jbauman, 2016-10-12 01:49:02]

The CQ bit was checked by jbauman@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-10-12 01:49:11]

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

[jbauman, 2016-10-12 01:50:10]

CL for src perf tryjob to run smoothness.top_25_smooth benchmark on winx64-zen
platform(s)

[jbauman, 2016-10-12 21:07:11]

CL for src perf tryjob to run smoothness.top_25_smooth benchmark on winx64-zen
platform(s)

[jbauman, 2016-10-12 22:49:53]

CL for src perf tryjob to run smoothness.top_25_smooth benchmark on winx64-zen
platform(s)

[jbauman, 2017-06-12 21:05:19]

Description was changed from

==========
Split picture layer quads to allow removing more occluded area.

With GPU rasterization tiles are much larger, so occlusion culling is
not nearly as effective because it's easy for occluding content to cover
only a portion of a tile. If we break up tiles into multiple quads then
much larger regions can be omitted.

BUG=526322,276069
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel
==========

to

==========
Split picture layer quads to allow removing more occluded area.

With GPU rasterization tiles are much larger, so occlusion culling is
not nearly as effective because it's easy for occluding content to cover
only a portion of a tile. If we break up tiles into multiple quads then
much larger regions can be omitted.

BUG=526322,276069
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel;master.tryserver.blink:linux_trusty_blink_rel
==========

[jbauman, 2017-06-12 21:05:25]

The CQ bit was checked by jbauman@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-06-12 21:06:00]

Dry run: 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, 2017-06-12 21:07:44]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-06-12 21:07:45]

Dry run: Try jobs failed on following builders:
  linux_precise_blink_rel on master.tryserver.blink (JOB_FAILED, build has not
started yet; builder either lacks capacity or does not exist (misspelled?))

[jbauman, 2017-06-12 21:08:35]

Description was changed from

==========
Split picture layer quads to allow removing more occluded area.

With GPU rasterization tiles are much larger, so occlusion culling is
not nearly as effective because it's easy for occluding content to cover
only a portion of a tile. If we break up tiles into multiple quads then
much larger regions can be omitted.

BUG=526322,276069
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel;master.tryserver.blink:linux_trusty_blink_rel
==========

to

==========
Split picture layer quads to allow removing more occluded area.

With GPU rasterization tiles are much larger, so occlusion culling is
not nearly as effective because it's easy for occluding content to cover
only a portion of a tile. If we break up tiles into multiple quads then
much larger regions can be omitted.

BUG=526322,276069
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel
==========

[jbauman, 2017-06-12 22:00:42]

The CQ bit was checked by jbauman@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-06-12 22:01:17]

Dry run: 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, 2017-06-12 23:06:42]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-06-12 23:06:45]

Dry run: Try jobs failed on following builders:
  linux_chromium_rel_ng on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)