tree 2e575f0d60041842aa8fd2ff2a2b5da9d16d7c4e
parent 1a15991c84a43381945cf5af171ddb6cef5406ae
author Yunchao He <yunchao.he@intel.com> 1591896515 +0000
committer Commit Bot service account <commit-bot@chromium.org> 1591896515 +0000

Vulkan: use one barrier to transit states for all subresources

If a texture follow this rule:
* old usages of all subresources are the same
* new usages of all subresources are the same
Then we can use one barrier to transit states for all subresources.
We don't need to use one barrier per each subresource.

This patch adds a flag at front-end to capture many (but not all)
situations which follow the rule above, then we don't need to loop
over every subresource at Vulkan backend.

Bug: dawn:441
Change-Id: I6124ee2cb09c9142fefd8f057dc6d2659301e2d4
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/22702
Commit-Queue: Yunchao He <yunchao.he@intel.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>