port HideDDrawGameWindow

docs/progress.txt

@@ -2573,7 +2573,7 @@ typedef enum GAME_OBJECT_ID {
 00445110    0000003A    +R      void __cdecl WinVidHideGameWindow(void);
 00445150    00000035    +R      void __cdecl WinVidSetGameWindowSize(int32_t width, int32_t height);
 00445190    000000A7    +R      bool __cdecl ShowDDrawGameWindow(bool active);
-00445240    00000087    -R      bool __cdecl HideDDrawGameWindow(void);
+00445240    00000087    +R      bool __cdecl HideDDrawGameWindow(void);
 004452D0    00000044    -R      HRESULT __cdecl DDrawSurfaceCreate(LPDDSDESC dsp, LPDDS *surface);
 00445320    00000046    -R      HRESULT __cdecl DDrawSurfaceRestoreLost(LPDDS surface1, LPDDS surface2, bool blank);
 00445370    0000004D    -R      bool __cdecl WinVidClearBuffer(LPDDS surface, LPRECT rect, DWORD fillColor);

src/decomp/decomp.c

@@ -646,3 +646,27 @@ bool __cdecl ShowDDrawGameWindow(bool active)
     g_IsDDrawGameWindowShow = true;
     return true;
 }
+
+bool __cdecl HideDDrawGameWindow(void)
+{
+    if (!g_GameWindowHandle || !g_DDraw) {
+        return false;
+    }
+    if (!g_IsDDrawGameWindowShow) {
+        return true;
+    }
+
+    WinVidHideGameWindow();
+    g_IsGameWindowUpdating = true;
+    const HRESULT result = IDirectDraw_SetCooperativeLevel(
+        g_DDraw, g_GameWindowHandle, DDSCL_NORMAL);
+    if (SUCCEEDED(result)) {
+        g_IsDDrawGameWindowShow = false;
+        SetWindowPos(
+            g_GameWindowHandle, NULL, g_GameWindowX, g_GameWindowY, 0, 0,
+            SWP_NOCOPYBITS | SWP_NOACTIVATE | SWP_NOZORDER | SWP_NOSIZE);
+    }
+
+    g_IsGameWindowUpdating = false;
+    return SUCCEEDED(result);
+}

src/decomp/decomp.h

@@ -37,3 +37,4 @@ void __cdecl WinVidShowGameWindow(int32_t cmd_show);
 void __cdecl WinVidHideGameWindow(void);
 void __cdecl WinVidSetGameWindowSize(int32_t width, int32_t height);
 bool __cdecl ShowDDrawGameWindow(bool active);
+bool __cdecl HideDDrawGameWindow(void);

src/global/funcs.h

@@ -513,7 +513,6 @@
 #define DDrawRelease ((void __cdecl (*)(void))0x00444C30)
 #define GameWindowCalculateSizeFromClient ((void __cdecl (*)(int32_t *width, int32_t *height))0x00444C70)
 #define GameWindowCalculateSizeFromClientByZero ((void __cdecl (*)(int32_t *width, int32_t *height))0x00444CF0)
-#define HideDDrawGameWindow ((bool __cdecl (*)(void))0x00445240)
 #define DDrawSurfaceCreate ((HRESULT __cdecl (*)(LPDDSDESC dsp, LPDDS *surface))0x004452D0)
 #define DDrawSurfaceRestoreLost ((HRESULT __cdecl (*)(LPDDS surface1, LPDDS surface2, bool blank))0x00445320)
 #define WinVidClearBuffer ((bool __cdecl (*)(LPDDS surface, LPRECT rect, DWORD fillColor))0x00445370)

src/inject_exec.c

@@ -66,6 +66,7 @@ static void Inject_Decomp(void)
     INJECT(1, 0x00445110, WinVidHideGameWindow);
     INJECT(1, 0x00445150, WinVidSetGameWindowSize);
     INJECT(1, 0x00445190, ShowDDrawGameWindow);
+    INJECT(1, 0x00445240, HideDDrawGameWindow);
     INJECT(1, 0x004471F0, DInputCreate);
     INJECT(1, 0x00447220, DInputRelease);
     INJECT(1, 0x00447240, WinInReadKeyboard);