tree a68ba8f4f3897a08ab881d777f3ddb3eae8bef43
parent ef23f4158db2562b956c57545a2580e9406e8b17
author Yunchao He <yunchao.he@intel.com> 1633052714 +0000
committer Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com> 1633052714 +0000

Track read-only depth/stencil attachment as read-only usage

If a depth/stencil texture view is used as sampled texture and
read-only render attachment in the same render pass, it should be fine.
Because both usages are readonly. However, Dawn doesn't distinguish
read-only render attachment from writeable render attachment. So, this
situation is thought to be invalid.

This change fixes the issue and allows these read-only usages in one
pass, with a validation test for verification.

Bug: dawn:485

Change-Id: I0df5a4209651cddd6122487d96b1810717e4eb22
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/65485
Commit-Queue: Yunchao He <yunchao.he@intel.com>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>