Qt: Fix Exclusive Fullscreen Mode Saving to Config

Add a variable to keep track if the window was in exclusive fullscreen. This helps prevent saving geometry to config which is for windows rendered separate from main.

The variable is set back to false when render window is released.

Author: jasaaved

pcsx2-qt/MainWindow.cpp

@@ -2538,6 +2538,7 @@ std::optional<WindowInfo> MainWindow::acquireRenderWindow(bool recreate_window,
 		return std::nullopt;
 	}
 
+	m_display_is_exclusive_fullscreen = g_emu_thread->isExclusiveFullscreen();
 	g_emu_thread->connectDisplaySignals(m_display_surface);
 
 	updateWindowTitle();
@@ -2709,6 +2710,7 @@ void MainWindow::releaseRenderWindow()
 	// Now we can safely destroy the display window.
 	destroyDisplayWidget(true);
 	m_display_created = false;
+	m_display_is_exclusive_fullscreen = false;
 
 	m_ui.actionViewSystemDisplay->setEnabled(false);
 	m_ui.actionFullscreen->setEnabled(false);
@@ -2719,7 +2721,7 @@ void MainWindow::destroyDisplayWidget(bool show_game_list)
 	if (!m_display_surface)
 		return;
 
-	if (!m_display_surface->isFullScreen() && !isRenderingToMain())
+	if (!(m_display_surface->isFullScreen() || m_display_is_exclusive_fullscreen) && !isRenderingToMain())
 		saveDisplayWindowGeometryToConfig();
 
 	if (isRenderingToMain())

pcsx2-qt/MainWindow.h

@@ -317,6 +317,7 @@ private Q_SLOTS:
 	QMenu* m_settings_toolbar_menu = nullptr;
 
 	bool m_display_created = false;
+	bool m_display_is_exclusive_fullscreen = false;
 	bool m_relative_mouse_mode = false;
 	bool m_hide_mouse_cursor = false;
 	bool m_was_paused_on_surface_loss = false;