tree 705ed14798d14c22e68346f52979da3c002e7acb
parent 2a7b631482d8cb167d5651be130b08549b4dedc8
author Jiawei Shao <jiawei.shao@intel.com> 1558483514 +0000
committer Commit Bot service account <commit-bot@chromium.org> 1558483514 +0000

Add workaround on using non-zero ResolveLevel or ResolveSlice on Metal

Current Metal drivers have a bug that doing MSAA resolve with non-zero
ResolveLevel and ResolveSlice cannot work correctly. This patch adds a
workaround for this bug that first resolving into a temporary one-level
2D texture, then copying the result into the true resolve target.

Although the end2end test ResolveIntoOneMipmapLevelOf2DTexture and
ResolveInto2DArrayTexture can pass on the try bot using AMD GPU, we
find they fail on some other AMD GPUs (Macbook Pro 2018), so currently
this workaround is enabled on all Metal backends.

BUG=dawn:56
TEST=dawn_end2end_tests

Change-Id: Ie85858e58ff486d49dc11c270d8b6d95e216fd42
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/6780
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>