From dc3be1243ac720827c1ce1c3dc6e7fb26eb33685 Mon Sep 17 00:00:00 2001
From: FunkyFr3sh <cc.red.alert.1@googlemail.com>
Date: Tue, 12 Dec 2023 00:39:25 +0100
Subject: [PATCH] #269 add workaround for Quest for Glory 5 movies

---
 inc/IDirectDrawSurface.h | 1 +
 src/ddsurface.c          | 6 +++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/inc/IDirectDrawSurface.h b/inc/IDirectDrawSurface.h
index 5c1a26d..e339450 100644
--- a/inc/IDirectDrawSurface.h
+++ b/inc/IDirectDrawSurface.h
@@ -42,6 +42,7 @@ typedef struct IDirectDrawSurfaceImpl
     DWORD last_flip_tick;
     DWORD last_blt_tick;
     BOOL queried;
+    BOOL skip_flip; /* Quest for Glory 5 */
 
     struct IDirectDrawSurfaceImpl* backbuffer;
     struct IDirectDrawClipperImpl* clipper;
diff --git a/src/ddsurface.c b/src/ddsurface.c
index cbea99f..29314bd 100644
--- a/src/ddsurface.c
+++ b/src/ddsurface.c
@@ -747,7 +747,7 @@ HRESULT dds_Flip(IDirectDrawSurfaceImpl* This, IDirectDrawSurfaceImpl* lpDDSurfa
 {
     dbg_dump_dds_flip_flags(dwFlags);
 
-    if (This->backbuffer)
+    if (This->backbuffer && !This->skip_flip)
     {
         EnterCriticalSection(&g_ddraw->cs);
         IDirectDrawSurfaceImpl* backbuffer = lpDDSurfaceTargetOverride ? lpDDSurfaceTargetOverride : This->backbuffer;
@@ -775,6 +775,8 @@ HRESULT dds_Flip(IDirectDrawSurfaceImpl* This, IDirectDrawSurfaceImpl* lpDDSurfa
         }
     }
 
+    This->skip_flip = FALSE;
+
     if ((This->caps & DDSCAPS_PRIMARYSURFACE) && g_ddraw && g_ddraw->render.run)
     {
         This->last_flip_tick = timeGetTime();
@@ -1318,6 +1320,8 @@ HRESULT dd_CreateSurface(
         g_ddraw->primary->height == g_ddraw->height &&
         g_ddraw->primary->bpp == g_ddraw->bpp)
     {
+        g_ddraw->primary->skip_flip = TRUE;
+
         *lpDDSurface = g_ddraw->primary;
         IDirectDrawSurface_AddRef(g_ddraw->primary);