tree fee3f46338d5b29b5a4449dff30bd04fe4e648ed
parent a0ccea1e8d1f2b7620db08c7cbbac7d01cfc38d6
author Jamie Madill <jmadill@chromium.org> 1522158272 -0400
committer Commit Bot <commit-bot@chromium.org> 1522185433 +0000

Split VAO dirty bits to speed iteration.

Using > 64 bits (we had over 90) would use a much slower dirty bit
iteration. Speed this up by splitting the dirty bits into two levels.
The first top level only has a single dirty bit per attrib, per
binding, and one bit for the element array buffer. The next level has
separate dirty bits for attribs and bindings.

The D3D11 back-end doesn't actually care about individual dirty bits
of attribs or bindings, since it resets entire attributes at a time,
but the GL back-end only refreshes the necessary info.

Improves the score of a simple state change microbenchmark by 15% on
the D3D11 and GL back-ends with a no-op driver. Real-world impact will
be smaller.

Also includes a test suppression for an NVIDIA bug that surfaced when
we changed the order of that GL commands were sent to the driver.

BUG=angleproject:2389

Change-Id: If8d5e5eb0b27e2a77e20535e33626183d372d311
Reviewed-on: https://chromium-review.googlesource.com/556799
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>