From c328ae95501113f679053a5023cb3eb94d73d381 Mon Sep 17 00:00:00 2001
From: FunkyFr3sh <cc.red.alert.1@googlemail.com>
Date: Mon, 16 Oct 2023 03:35:09 +0200
Subject: [PATCH] forward input to video window during video playback

---
 inc/dd.h          |  1 +
 src/render_d3d9.c |  1 +
 src/render_gdi.c  |  1 +
 src/render_ogl.c  |  1 +
 src/utils.c       |  2 ++
 src/wndproc.c     | 21 +++++++++++++++++++++
 6 files changed, 27 insertions(+)

diff --git a/inc/dd.h b/inc/dd.h
index 1d0aa8f..1ab5d64 100644
--- a/inc/dd.h
+++ b/inc/dd.h
@@ -136,6 +136,7 @@ typedef struct CNCDDRAW
     void* last_freed_palette; /* Dungeon Keeper hack */
     void* last_freed_surface; /* Nox hack */
     BOOL child_window_exists;
+    HWND video_window_hwnd;
     BOOL got_child_windows;
     DWORD last_set_window_pos_tick; /* WINE hack */
     SPEEDLIMITER ticks_limiter;
diff --git a/src/render_d3d9.c b/src/render_d3d9.c
index 66511ad..cae506b 100644
--- a/src/render_d3d9.c
+++ b/src/render_d3d9.c
@@ -541,6 +541,7 @@ DWORD WINAPI d3d9_render_main(void)
             if (g_config.fixchilds)
             {
                 g_ddraw->child_window_exists = FALSE;
+                InterlockedExchangePointer(&g_ddraw->video_window_hwnd, NULL);
                 EnumChildWindows(g_ddraw->hwnd, util_enum_child_proc, (LPARAM)g_ddraw->primary);
 
                 if (g_ddraw->render.width != g_ddraw->width || g_ddraw->render.height != g_ddraw->height)
diff --git a/src/render_gdi.c b/src/render_gdi.c
index bd88fb6..40d5263 100644
--- a/src/render_gdi.c
+++ b/src/render_gdi.c
@@ -84,6 +84,7 @@ DWORD WINAPI gdi_render_main(void)
             if (g_config.fixchilds)
             {
                 g_ddraw->child_window_exists = FALSE;
+                InterlockedExchangePointer(&g_ddraw->video_window_hwnd, NULL);
                 EnumChildWindows(g_ddraw->hwnd, util_enum_child_proc, (LPARAM)g_ddraw->primary);
             }
 
diff --git a/src/render_ogl.c b/src/render_ogl.c
index cc87e92..79b1477 100644
--- a/src/render_ogl.c
+++ b/src/render_ogl.c
@@ -770,6 +770,7 @@ static void ogl_render()
             if (g_config.fixchilds)
             {
                 g_ddraw->child_window_exists = FALSE;
+                InterlockedExchangePointer(&g_ddraw->video_window_hwnd, NULL);
                 EnumChildWindows(g_ddraw->hwnd, util_enum_child_proc, (LPARAM)g_ddraw->primary);
 
                 if (g_ddraw->render.width != g_ddraw->width || g_ddraw->render.height != g_ddraw->height)
diff --git a/src/utils.c b/src/utils.c
index 5aeadd0..999a8e4 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -475,6 +475,8 @@ BOOL CALLBACK util_enum_child_proc(HWND hwnd, LPARAM lparam)
             strcmp(class_name, "AVIWnd32") == 0 || 
             strcmp(class_name, "MCIWndClass") == 0)
         {
+            InterlockedExchangePointer(&g_ddraw->video_window_hwnd, hwnd);
+
             LONG style = real_GetWindowLongA(hwnd, GWL_EXSTYLE);
 
             if (!(style & WS_EX_TRANSPARENT))
diff --git a/src/wndproc.c b/src/wndproc.c
index 5ff00c2..4fccc95 100644
--- a/src/wndproc.c
+++ b/src/wndproc.c
@@ -729,6 +729,13 @@ LRESULT CALLBACK fake_WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam
             }
         }
 
+        HWND video_hwnd = (HWND)InterlockedExchangeAdd((LONG*)&g_ddraw->video_window_hwnd, 0);
+        if (video_hwnd)
+        {
+            PostMessageA(video_hwnd, uMsg, wParam, lParam);
+            return 0;
+        }
+
         break;
     }
     case WM_KEYUP:
@@ -736,6 +743,13 @@ LRESULT CALLBACK fake_WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam
         if (g_config.hotkeys.screenshot && wParam == g_config.hotkeys.screenshot)
             ss_take_screenshot(g_ddraw->primary);
 
+        HWND video_hwnd = (HWND)InterlockedExchangeAdd((LONG*)&g_ddraw->video_window_hwnd, 0);
+        if (video_hwnd)
+        {
+            PostMessageA(video_hwnd, uMsg, wParam, lParam);
+            return 0;
+        }
+
         break;
     }
     /* button up messages reactivate cursor lock */
@@ -824,6 +838,13 @@ LRESULT CALLBACK fake_WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam
 
         lParam = MAKELPARAM(x, y);
 
+        HWND video_hwnd = (HWND)InterlockedExchangeAdd((LONG*)&g_ddraw->video_window_hwnd, 0);
+        if (video_hwnd)
+        {
+            PostMessageA(video_hwnd, uMsg, wParam, lParam);
+            return 0;
+        }
+
         break;
     }
     case WM_PARENTNOTIFY: