From e5294cafb11e735eaf5550c2b35fab593b834d46 Mon Sep 17 00:00:00 2001
From: Arne Scheffler <a.scheffler@steinberg.de>
Date: Sun, 28 Jan 2024 12:44:12 +0100
Subject: [PATCH] Windows DirectComposition: fix UI flickering with some GPU
 cards/drivers

---
 vstgui/lib/platform/win32/win32directcomposition.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/vstgui/lib/platform/win32/win32directcomposition.cpp b/vstgui/lib/platform/win32/win32directcomposition.cpp
index cef864410..8567c8257 100644
--- a/vstgui/lib/platform/win32/win32directcomposition.cpp
+++ b/vstgui/lib/platform/win32/win32directcomposition.cpp
@@ -678,6 +678,8 @@ bool Factory::Impl::createD3D11Device ()
 										 D3D_FEATURE_LEVEL_9_3,	 D3D_FEATURE_LEVEL_9_2,
 										 D3D_FEATURE_LEVEL_9_1};
 	UINT creationFlags = D3D11_CREATE_DEVICE_BGRA_SUPPORT;
+	// fix UI flickering with some GPU cards/drivers
+	creationFlags |= D3D11_CREATE_DEVICE_PREVENT_INTERNAL_THREADING_OPTIMIZATIONS;
 #if DEBUG
 	creationFlags |= D3D11_CREATE_DEVICE_DEBUG;
 #endif