tree e2296d848f64a0506f0523c7e942b2fa37abbfca
parent 737d5d8e967be13c9e9f6a3201ce841eb9529082
author Jiawei Shao <jiawei.shao@intel.com> 1724893070 +0000
committer Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com> 1724893070 +0000

Tint: Support `clip_distances` on HLSL

This patch implements the translation of built-in value `clip_distances`
on HLSL. We should take different ways to do the translation according
to the array length of `clip_distances`:
- Array length is 1:
  float clipDistance : SV_ClipDistance0
- Array length is 2 to 4:
  floatN clipDistance : SV_ClipDistance0
- Array length is 5:
  float4 clipDistance : SV_ClipDistance0
  float clipDistance1 : SV_ClipDistance1
- Array length is 6 to 8:
  float4 clipDistance : SV_ClipDistance0
  floatN clipDistance1 : SV_ClipDistance1

To correctly translate in HLSL backend we have to use
`core::BuiltinValue::kClipDistances` as `SV_ClipDistance0` and the
internal attribute `HLSLClipDistance1` as `SV_ClipDistance1`.

Bug: chromium:358408571
Change-Id: I5d0843cc846190c60a028e48fb8e13ae9a88a5bb
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/203775
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>