Austin Eng 2d0007ca8f Don't connect to backends that aren't needed
Change backend connection in Instance.cpp to store a bitset of
backends that have been connected. This lets us only connect to a
single backend if AdapterDiscoveryOptions are passed explicitly,
and track which connections have/have not been made. Later, we can
connect to the rest of the backends if more are requested.

This is part of some improvements to the existing code so we can
selectively discover adapters and control discovery of the
high-performance, low-power, and fallback WebGPU adapters.

Bug: chromium:1266550
Change-Id: Iceb0d3f71751f5aac6218996ace3cf89deda8a29
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/69521
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
2021-12-02 18:12:57 +00:00
..