tree fc80a492f9ea2f608c89f25e0512b0319e6e8634
parent 452d6e3cc35351bd70fbe2f8b2be11f352eed4f3
author Corentin Wallez <cwallez@chromium.org> 1672921492 +0000
committer Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com> 1672921492 +0000

Vulkan: Clamp @builtin(frag_depth) with push constant values

Start using Tint's ClampFragDepth transform in the Vulkan backend when
needed in order to correctly clamp @builtin(frag_depth) on Vulkan. Do
this by always reserving 8 bytes of push constant space to contain the
f32 min and max values from the last viewport command.

Reenables relevant CTS tests that were suppressed on Vulkan.

Bug: dawn:1125, dawn:1576, dawn:1616
Change-Id: I38f4f6c3c51c99b5e591a780fea9859537529534
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/105642
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Loko Kung <lokokung@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>