From d952e5cfb350dc01bb95bde833e453fa2a34b726 Mon Sep 17 00:00:00 2001
From: Yanna <yanna@users.noreply.github.com>
Date: Mon, 16 Oct 2023 11:25:15 -0700
Subject: [PATCH] Check nativeWindow pointer before dereferencing (#3185)

Fix access violation in headless mode during bgfx::shutdown().
This pointer is usually set by the SwapChainPanel which doesn't exist
in headless mode.

Co-authored-by: Yanna Kang <yaka@microsoft.com>
---
 src/dxgi.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/dxgi.cpp b/src/dxgi.cpp
index 6871e1167..ecca128b2 100644
--- a/src/dxgi.cpp
+++ b/src/dxgi.cpp
@@ -142,9 +142,9 @@ namespace bgfx
 	template<typename T>
 	static bool trySetSwapChain(IInspectable* nativeWindow, Dxgi::SwapChainI* swapChain, HRESULT* hr)
 	{
-		ISwapChainPanelNative* swapChainPanelNative;
+		ISwapChainPanelNative* swapChainPanelNative = NULL;
 
-		if (FAILED(nativeWindow->QueryInterface(__uuidof(T), (void**)&swapChainPanelNative))
+		if (NULL != nativeWindow && FAILED(nativeWindow->QueryInterface(__uuidof(T), (void**)&swapChainPanelNative))
 		||  NULL == swapChainPanelNative)
 		{
 			return false;