From d0dbb16b9bb0901af998f7f9b83e0076047d42d3 Mon Sep 17 00:00:00 2001
From: FunkyFr3sh <cc.red.alert.1@googlemail.com>
Date: Mon, 3 Jun 2024 03:15:16 +0200
Subject: [PATCH] ignore WM_PAINT and WM_ERASEBKGND if there's no primary
 surface

---
 src/wndproc.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/wndproc.c b/src/wndproc.c
index b2ebd71..81c1b30 100644
--- a/src/wndproc.c
+++ b/src/wndproc.c
@@ -968,12 +968,16 @@ LRESULT CALLBACK fake_WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam
             RedrawWindow(hWnd, NULL, NULL, RDW_INVALIDATE | RDW_ALLCHILDREN);
         }
 
-        ReleaseSemaphore(g_ddraw.render.sem, 1, NULL);
+        if (g_ddraw.primary)
+        {
+            ReleaseSemaphore(g_ddraw.render.sem, 1, NULL);
+        }
+
         break;
     }
     case WM_ERASEBKGND:
     {
-        if (g_ddraw.render.viewport.x != 0 || g_ddraw.render.viewport.y != 0)
+        if (g_ddraw.primary && (g_ddraw.render.viewport.x != 0 || g_ddraw.render.viewport.y != 0))
         {
             InterlockedExchange(&g_ddraw.render.clear_screen, TRUE);
             ReleaseSemaphore(g_ddraw.render.sem, 1, NULL);