Commit e858cb1db3c266f67adf998dc14bb17eccec084b
2018-03-27T09:44:32
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>