tree b8b962df3e50413f7739b7d0c9fbbdd9772c68d5
parent 7e5114c3f5d0ae8cb00c89f53aae5f91cf8134b1
author Jiawei Shao <jiawei.shao@intel.com> 1721909329 +0000
committer Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com> 1721909329 +0000

Don't allow using multiple color targets with dual source blending

This patch adds a new validation to disallow using multiple color
targets with dual source blending to follow the latest WebGPU SPEC.

When `Src1` is used in the blend factor, there must be exactly one
color target, as is required by D3D12.

Bug: chromium:341973423
Test: dawn_end2end_tests
Change-Id: Ia6f263d1e0f06887498b37fb66cc0e9b59493e64
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/200115
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>