From e30b783505247753723c95eab5239c802b19b047 Mon Sep 17 00:00:00 2001
From: Christopher Egert <cme3000@gmail.com>
Date: Tue, 8 Nov 2022 23:47:01 +0100
Subject: [PATCH] d3d9: Use a different rvalue for depth bias on NV

---
 src/d3d9/d3d9_device.cpp | 3 ++-
 src/d3d9/d3d9_util.h     | 6 +++---
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/d3d9/d3d9_device.cpp b/src/d3d9/d3d9_device.cpp
index a89cc4631..93da5ce3d 100644
--- a/src/d3d9/d3d9_device.cpp
+++ b/src/d3d9/d3d9_device.cpp
@@ -1382,7 +1382,8 @@ namespace dxvk {
     m_flags.set(D3D9DeviceFlag::DirtyFramebuffer);
 
     if (ds != nullptr) {
-      float rValue = GetDepthBufferRValue(ds->GetCommonTexture()->GetFormatMapping().FormatColor);
+      const int32_t vendorId = m_dxvkDevice->adapter()->deviceProperties().vendorID;
+      float rValue = GetDepthBufferRValue(ds->GetCommonTexture()->GetFormatMapping().FormatColor, vendorId);
       if (m_depthBiasScale != rValue) {
         m_depthBiasScale = rValue;
         m_flags.set(D3D9DeviceFlag::DirtyDepthBias);
diff --git a/src/d3d9/d3d9_util.h b/src/d3d9/d3d9_util.h
index 4358233f8..5da8e95db 100644
--- a/src/d3d9/d3d9_util.h
+++ b/src/d3d9/d3d9_util.h
@@ -176,14 +176,14 @@ namespace dxvk {
 
   void ConvertRect(RECT rect, VkOffset2D& offset, VkExtent2D& extent);
 
-  inline float GetDepthBufferRValue(VkFormat Format) {
+  inline float GetDepthBufferRValue(VkFormat Format, int32_t vendorId) {
     switch (Format) {
       case VK_FORMAT_D16_UNORM_S8_UINT:
       case VK_FORMAT_D16_UNORM:
-        return float(1 << 16);
+        return vendorId == 0x10de ? float(1 << 15) : float(1 << 16);
 
       case VK_FORMAT_D24_UNORM_S8_UINT:
-        return float(1 << 24);
+        return vendorId == 0x10de ? float(1 << 23) : float(1 << 24);
 
       default:
       case VK_FORMAT_D32_SFLOAT_S8_UINT: