From c2ed8759c8aa92572cffbe707fcd8b63268dad91 Mon Sep 17 00:00:00 2001
From: Seungha Yang <seungha@centricular.com>
Date: Thu, 12 Oct 2023 02:47:28 +0900
Subject: [PATCH] d3d11videosink: Don't use DXGI_ALPHA_MODE_PREMULTIPLIED for
 HWND swapchain

It's allowed only for a swapchain type which does composition

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5464>
---
 subprojects/gst-plugins-bad/sys/d3d11/gstd3d11window_win32.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/subprojects/gst-plugins-bad/sys/d3d11/gstd3d11window_win32.cpp b/subprojects/gst-plugins-bad/sys/d3d11/gstd3d11window_win32.cpp
index c0e8375daa..70f3a9ac00 100644
--- a/subprojects/gst-plugins-bad/sys/d3d11/gstd3d11window_win32.cpp
+++ b/subprojects/gst-plugins-bad/sys/d3d11/gstd3d11window_win32.cpp
@@ -1098,7 +1098,7 @@ gst_d3d11_window_win32_create_swap_chain (GstD3D11Window * window,
     if (gst_d3d11_is_windows_8_or_greater ())
       desc1.Scaling = DXGI_SCALING_NONE;
     desc1.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
-    desc1.AlphaMode = DXGI_ALPHA_MODE_PREMULTIPLIED;
+    desc1.AlphaMode = DXGI_ALPHA_MODE_UNSPECIFIED;
     desc1.Flags = swapchain_flags;
 
     new_swapchain = create_swap_chain_for_hwnd (self, device,