From 5548493fad9a47998d460093a419def05e1404fd Mon Sep 17 00:00:00 2001
From: Joshua Ashton <joshua@froggi.es>
Date: Fri, 28 Feb 2020 21:40:19 +0000
Subject: [PATCH] [d3d9] Don't update device state for offset/stride if the
 buffer is nullptr

May also avoid some redundant rebinds here too...

Fixes a Wine test
---
 src/d3d9/d3d9_device.cpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/d3d9/d3d9_device.cpp b/src/d3d9/d3d9_device.cpp
index ecce32f0..5a69632b 100644
--- a/src/d3d9/d3d9_device.cpp
+++ b/src/d3d9/d3d9_device.cpp
@@ -2815,11 +2815,13 @@ namespace dxvk {
     if (needsUpdate)
       vbo.vertexBuffer = buffer;
 
-    needsUpdate |= vbo.offset != OffsetInBytes
-                || vbo.stride != Stride;
+    if (buffer != nullptr) {
+      needsUpdate |= vbo.offset != OffsetInBytes
+                  || vbo.stride != Stride;
 
-    vbo.offset = OffsetInBytes;
-    vbo.stride = Stride;
+      vbo.offset = OffsetInBytes;
+      vbo.stride = Stride;
+    }
 
     if (needsUpdate)
       BindVertexBuffer(StreamNumber, buffer, OffsetInBytes, Stride);