From 903f1af1764bf7329d4893bf914c76082a811d43 Mon Sep 17 00:00:00 2001
From: Robin Kertels <robin.kertels@gmail.com>
Date: Thu, 12 Sep 2024 15:27:31 +0200
Subject: [PATCH] [d3d9] Fix PresentGDI

---
 src/d3d9/d3d9_swapchain.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/d3d9/d3d9_swapchain.cpp b/src/d3d9/d3d9_swapchain.cpp
index 76ba168db..4ee347c2e 100644
--- a/src/d3d9/d3d9_swapchain.cpp
+++ b/src/d3d9/d3d9_swapchain.cpp
@@ -1041,7 +1041,9 @@ namespace dxvk {
     desc.Discard            = FALSE;
     desc.IsBackBuffer       = TRUE;
     desc.IsAttachmentOnly   = FALSE;
-    desc.IsLockable         = (Flags & D3DPRESENTFLAG_LOCKABLE_BACKBUFFER) != 0;
+    // we cannot respect D3DPRESENTFLAG_LOCKABLE_BACKBUFFER here because
+    // we might need to lock for the BlitGDI fallback path
+    desc.IsLockable         = true;
 
     for (uint32_t i = 0; i < NumBuffers; i++) {
       D3D9Surface* surface;