From 470764e24c76f384790eb14022f2a34bcb2cf4a1 Mon Sep 17 00:00:00 2001
From: WinterSnowfall <WinterSnowfall@users.noreply.github.com>
Date: Fri, 10 Jan 2025 22:33:19 +0200
Subject: [PATCH] [d3d8] Don't forward D3DRS_PATCHSEGMENTS changes to d3d9

---
 src/d3d8/d3d8_device.cpp | 11 ++++++-----
 src/d3d8/d3d8_device.h   |  7 +++++--
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/src/d3d8/d3d8_device.cpp b/src/d3d8/d3d8_device.cpp
index 64198e353..b1d2d2225 100644
--- a/src/d3d8/d3d8_device.cpp
+++ b/src/d3d8/d3d8_device.cpp
@@ -1620,10 +1620,11 @@ namespace dxvk {
 
         return GetD3D9()->SetSoftwareVertexProcessing(Value);
 
-      // TODO: D3DRS_PATCHSEGMENTS
+      // TODO: Implement D3DRS_PATCHSEGMENTS
       case D3DRS_PATCHSEGMENTS:
-        stateChange = false;
-        break;
+        Logger::warn("D3D8Device::SetRenderState: Unimplemented render state D3DRS_PATCHSEGMENTS");
+        m_patchSegments = bit::cast<float>(Value);
+        return D3D_OK;
     }
 
     if (stateChange) {
@@ -1674,9 +1675,9 @@ namespace dxvk {
       case D3DRS_SOFTWAREVERTEXPROCESSING:
         return GetD3D9()->GetSoftwareVertexProcessing();
 
-      // TODO: D3DRS_PATCHSEGMENTS
       case D3DRS_PATCHSEGMENTS:
-        break;
+        *pValue = bit::cast<DWORD>(m_patchSegments);
+        return D3D_OK;
     }
 
     // This call will never fail
diff --git a/src/d3d8/d3d8_device.h b/src/d3d8/d3d8_device.h
index 181e513c4..2cba51b45 100644
--- a/src/d3d8/d3d8_device.h
+++ b/src/d3d8/d3d8_device.h
@@ -425,8 +425,11 @@ namespace dxvk {
     Com<D3D8Interface>    m_parent;
 
     D3DPRESENT_PARAMETERS m_presentParams;
-
-    D3DLINEPATTERN        m_linePattern = {};
+    
+    // Value of D3DRS_LINEPATTERN
+    D3DLINEPATTERN        m_linePattern   = {};
+    // Value of D3DRS_PATCHSEGMENTS
+    float                 m_patchSegments = 1.0f;
 
     D3D8StateBlock*                            m_recorder = nullptr;
     DWORD                                      m_recorderToken = 0;