From 7fdf800b587970617f7a22482cbeaaeb39d5f1f5 Mon Sep 17 00:00:00 2001
From: zeromus <zeromus@users.noreply.github.com>
Date: Wed, 22 Apr 2020 15:47:31 -0400
Subject: [PATCH] fix ddraw HW breaking after windows lock screen

---
 desmume/src/frontend/windows/ddraw.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/desmume/src/frontend/windows/ddraw.cpp b/desmume/src/frontend/windows/ddraw.cpp
index afbdb58b9..84898486c 100644
--- a/desmume/src/frontend/windows/ddraw.cpp
+++ b/desmume/src/frontend/windows/ddraw.cpp
@@ -117,7 +117,10 @@ bool DDRAW::createSurfaces(HWND hwnd)
 bool DDRAW::lock()
 {
 	if (!handle) return true;
-	if (!surface.back) return false;
+	if (!surface.back) {
+		surfDescBack.dwWidth = 0; //signal to another file to try recreating
+		return false;
+	}
 	memset(&surfDescBack, 0, sizeof(surfDescBack));
 	surfDescBack.dwSize = sizeof(surfDescBack);
 	surfDescBack.dwFlags = DDSD_ALL;