Disable rendering when minimized

This recovers the original use of gbActive

Source/movie.cpp

@@ -11,10 +11,6 @@ void play_movie(char *pszMovie, BOOL user_can_close)
 	WNDPROC saveProc;
 	HANDLE video_stream;
 
-	if (!gbActive) {
-		return;
-	}
-
 	saveProc = SetWindowProc(MovieWndProc);
 	movie_playing = TRUE;
 	sound_disable_music(TRUE);
@@ -25,7 +21,7 @@ void play_movie(char *pszMovie, BOOL user_can_close)
 	if (video_stream) {
 		MSG Msg;
 		while (video_stream) {
-			if (!gbActive || user_can_close && !movie_playing)
+			if (user_can_close && !movie_playing)
 				break;
 			while (PeekMessage(&Msg, NULL, 0, 0, PM_REMOVE)) {
 				if (Msg.message != WM_QUIT) {

SourceX/DiabloUI/dialogs.cpp

@@ -292,7 +292,9 @@ void DialogLoop(UiItem *items, std::size_t num_items, UiItem *render_behind, std
 
 void UiOkDialog(const char *text, const char *caption, bool error, UiItem *render_behind, std::size_t render_behind_size)
 {
-	if (!gbActive) {
+	static bool inDialog = false;
+
+	if (!gbActive || inDialog) {
 		if (SDL_ShowCursor(SDL_ENABLE) <= -1) {
 			SDL_Log(SDL_GetError());
 		}
@@ -304,11 +306,11 @@ void UiOkDialog(const char *text, const char *caption, bool error, UiItem *rende
 		return;
 	}
 
-	gbActive = false;
+	inDialog = true;
 	Init(text, caption, error);
 	DialogLoop(dialogItems, dialogItemsSize, render_behind, render_behind_size);
 	Deinit();
-	gbActive = true;
+	inDialog = false;
 }
 
 void UiErrorOkDialog(const char *text, const char *caption, UiItem *render_behind, std::size_t render_behind_size)

SourceX/miniwin/misc_msg.cpp

@@ -555,31 +555,26 @@ WINBOOL PeekMessageA(LPMSG lpMsg, HWND hWnd, UINT wMsgFilterMin, UINT wMsgFilter
 		return false_avail("SDL_TEXTINPUT", e.text.windowID);
 	case SDL_WINDOWEVENT:
 		switch (e.window.event) {
+		case SDL_WINDOWEVENT_SHOWN:
+			gbActive = true;
+			lpMsg->message = DVL_WM_PAINT;
+			break;
 		case SDL_WINDOWEVENT_HIDDEN:
-			// TODO stop rendering to minimize CPU usage (gbActive)
+			gbActive = false;
 			break;
-		case SDL_WINDOWEVENT_MINIMIZED:
+		case SDL_WINDOWEVENT_EXPOSED:
-			// TODO pause
+			lpMsg->message = DVL_WM_PAINT;
 			break;
-		case SDL_WINDOWEVENT_FOCUS_GAINED:
+		case SDL_WINDOWEVENT_MOVED:
-		case SDL_WINDOWEVENT_TAKE_FOCUS:
 		case SDL_WINDOWEVENT_RESIZED:
 		case SDL_WINDOWEVENT_SIZE_CHANGED:
-		case SDL_WINDOWEVENT_MOVED:
+		case SDL_WINDOWEVENT_MINIMIZED:
-		case SDL_WINDOWEVENT_RESTORED:
 		case SDL_WINDOWEVENT_MAXIMIZED:
+		case SDL_WINDOWEVENT_RESTORED:
 		case SDL_WINDOWEVENT_LEAVE:
+		case SDL_WINDOWEVENT_FOCUS_GAINED:
 		case SDL_WINDOWEVENT_FOCUS_LOST:
-			break;
+		case SDL_WINDOWEVENT_TAKE_FOCUS:
-		case SDL_WINDOWEVENT_CLOSE:
-			lpMsg->message = DVL_WM_QUERYENDSESSION;
-			break;
-		case SDL_WINDOWEVENT_SHOWN:
-			gbActive = true;
-			lpMsg->message = DVL_WM_PAINT;
-			break;
-		case SDL_WINDOWEVENT_EXPOSED:
-			lpMsg->message = DVL_WM_PAINT;
 			break;
 		case SDL_WINDOWEVENT_ENTER:
 			lpMsg->message = DVL_WM_MOUSEHOVER;
@@ -592,6 +587,9 @@ WINBOOL PeekMessageA(LPMSG lpMsg, HWND hWnd, UINT wMsgFilterMin, UINT wMsgFilter
 				mouseWarping = false;
 			}
 			break;
+		case SDL_WINDOWEVENT_CLOSE:
+			lpMsg->message = DVL_WM_QUERYENDSESSION;
+			break;
 		default:
 			return false_avail("SDL_WINDOWEVENT", e.window.event);
 		}