From 93f43e875115e35dac96322663825a2a1e53e398 Mon Sep 17 00:00:00 2001
From: Magnus Norddahl <dpjudas@users.noreply.github.com>
Date: Mon, 13 Feb 2017 15:42:35 +0100
Subject: [PATCH] Menu code accessed the screen buffer without a lock

---
 src/v_draw.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/v_draw.cpp b/src/v_draw.cpp
index 6d86e0a0e..6430b9448 100644
--- a/src/v_draw.cpp
+++ b/src/v_draw.cpp
@@ -198,6 +198,8 @@ void DCanvas::DrawTextureParms(FTexture *img, DrawParms &parms)
 	
 	viewport->RenderTarget = screen;
 
+	viewport->RenderTarget->Lock(true);
+
 	if (APART(parms.colorOverlay) != 0)
 	{
 		// The software renderer cannot invert the source without inverting the overlay
@@ -324,6 +326,8 @@ void DCanvas::DrawTextureParms(FTexture *img, DrawParms &parms)
 	{
 		NetUpdate();
 	}
+
+	viewport->RenderTarget->Unlock();
 #endif
 }