From 088cf45439d2c62b1f52fbdee8cbc3cd77d918ea Mon Sep 17 00:00:00 2001
From: WinterSnowfall <WinterSnowfall@users.noreply.github.com>
Date: Fri, 4 Oct 2024 20:39:32 +0300
Subject: [PATCH] [d3d9] Validate 0 valued back buffer dimensions for
 fullscreen mode

---
 src/d3d9/d3d9_device.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/d3d9/d3d9_device.cpp b/src/d3d9/d3d9_device.cpp
index 110a5783b..1c40f455f 100644
--- a/src/d3d9/d3d9_device.cpp
+++ b/src/d3d9/d3d9_device.cpp
@@ -8152,6 +8152,12 @@ namespace dxvk {
       "    - Windowed:           ", pPresentationParameters->Windowed ? "true" : "false", "\n",
       "    - Swap effect:        ", pPresentationParameters->SwapEffect, "\n"));
 
+    if (!pPresentationParameters->Windowed &&
+        (pPresentationParameters->BackBufferWidth  == 0
+      || pPresentationParameters->BackBufferHeight == 0)) {
+      return D3DERR_INVALIDCALL;
+    }
+
     if (backBufferFmt != D3D9Format::Unknown && !unlockedFormats) {
       if (!IsSupportedBackBufferFormat(backBufferFmt)) {
         Logger::err(str::format("D3D9DeviceEx::ResetSwapChain: Unsupported backbuffer format: ",