tree d9bb32e7497eb933f8572c188597cc94f50dcef2
parent 95e715873d61dba34a66d0979b99578c844a55d5
author Bryan Bernhart <bryan.bernhart@intel.com> 1600385440 +0000
committer Commit Bot service account <commit-bot@chromium.org> 1600385440 +0000

D3D12: Align UBO sizes to 256B.

D3D debug layer uses the descriptor size (width) to
validate CBV bounds when directly allocating UBOs.
This causes validation failure when the buffer size
is misaligned (ie. not a multiple of 256B) even
through the underlying resource heap size is always
64KB aligned.

This change always aligns the buffer size to be 256B
to avoid such validation error should sub-allocation
fail.

BUG=dawn:506

Change-Id: Ic9072934cac65cfd25d0e2a20cb364bd3ca88e3b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/26820
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Bryan Bernhart <bryan.bernhart@intel.com>