From b2ad25755a7085ea9eac5f120ba4aa7a587e2ed5 Mon Sep 17 00:00:00 2001
From: Adam Jereczek <adamjer01@gmail.com>
Date: Wed, 28 Sep 2022 16:40:41 +0200
Subject: [PATCH] [d3d9] Fix for missing restriction check in ProcessVertices

Co-authored-by: aroztkow <aneta.roztkowska@intel.com>
---
 src/d3d9/d3d9_device.cpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/d3d9/d3d9_device.cpp b/src/d3d9/d3d9_device.cpp
index 536c6331a..3aa396482 100644
--- a/src/d3d9/d3d9_device.cpp
+++ b/src/d3d9/d3d9_device.cpp
@@ -2620,9 +2620,18 @@ namespace dxvk {
           DWORD                        Flags) {
     D3D9DeviceLock lock = LockDevice();
 
-    if (unlikely(pDestBuffer == nullptr || pVertexDecl == nullptr))
+    if (unlikely(pDestBuffer == nullptr))
       return D3DERR_INVALIDCALL;
 
+    // When vertex shader 3.0 or above is set as the current vertex shader,
+    // the output vertex declaration must be present.
+    if (UseProgrammableVS()) {
+      const auto& programInfo = GetCommonShader(m_state.vertexShader)->GetInfo();
+
+      if (unlikely(programInfo.majorVersion() >= 3) && (pVertexDecl == nullptr))
+        return D3DERR_INVALIDCALL;
+    }
+
     if (!SupportsSWVP()) {
       static bool s_errorShown = false;