From b838b65516bfb17e8ebe745f2a970e98973375b3 Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Tue, 6 Dec 2022 22:15:13 +0100
Subject: [PATCH] [d3d9] Correctly mask alpha reference push constant

We accidentally lost this during the rework, since the initial
implementation scaled the alpha ref value on the CPU.

Fixes #3123.
---
 src/d3d9/d3d9_device.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/d3d9/d3d9_device.cpp b/src/d3d9/d3d9_device.cpp
index b882fcc4..b5be3db8 100644
--- a/src/d3d9/d3d9_device.cpp
+++ b/src/d3d9/d3d9_device.cpp
@@ -5187,7 +5187,7 @@ namespace dxvk {
     auto& rs = m_state.renderStates;
 
     if constexpr (Item == D3D9RenderStateItem::AlphaRef) {
-      uint32_t alpha = rs[D3DRS_ALPHAREF];
+      uint32_t alpha = rs[D3DRS_ALPHAREF] & 0xFF;
       UpdatePushConstant<offsetof(D3D9RenderStateInfo, alphaRef), sizeof(uint32_t)>(&alpha);
     }
     else if constexpr (Item == D3D9RenderStateItem::FogColor) {