This CL complete the validation rules for CopyTextureForBrowser by:
- Restrict source texture must have |CopySrc| and |Sampled| usage.
- Restrict destinaton texture must have |CopyDst| and
|RenderAttachment| usage.
- Restrict sample counts of source texture and destination texture
must be 1.
- Restrict source copy origin.z must be 0.
- Restrict CopyTextureForBrowser() can only copy to single slice.
A validation unittest is added to check.
BUG=dawn:465
Change-Id: I5e645a4b69edeaf97ce1231bd7c8036027524ba8
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/49306
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
