Add performance statistics to status bar

src/citra_qt/main.cpp

@@ -253,6 +253,8 @@ void GMainWindow::ConnectWidgetEvents() {
     connect(this, SIGNAL(EmulationStarting(EmuThread*)), render_window,
             SLOT(OnEmulationStarting(EmuThread*)));
     connect(this, SIGNAL(EmulationStopping()), render_window, SLOT(OnEmulationStopping()));
+
+    connect(&status_bar_update_timer, &QTimer::timeout, this, &GMainWindow::UpdateStatusBar);
 }
 
 void GMainWindow::ConnectMenuEvents() {
@@ -401,6 +403,8 @@ void GMainWindow::BootGame(const QString& filename) {
     if (ui.action_Single_Window_Mode->isChecked()) {
         game_list->hide();
     }
+    status_bar_update_timer.start(1000);
+
     render_window->show();
     render_window->setFocus();
 
@@ -435,6 +439,12 @@ void GMainWindow::ShutdownGame() {
     render_window->hide();
     game_list->show();
 
+    // Disable status bar updates
+    status_bar_update_timer.stop();
+    emu_speed_label->setVisible(false);
+    game_fps_label->setVisible(false);
+    emu_frametime_label->setVisible(false);
+
     emulation_running = false;
 }
 
@@ -614,6 +624,23 @@ void GMainWindow::OnCreateGraphicsSurfaceViewer() {
     graphicsSurfaceViewerWidget->show();
 }
 
+void GMainWindow::UpdateStatusBar() {
+    if (emu_thread == nullptr) {
+        status_bar_update_timer.stop();
+        return;
+    }
+
+    auto results = Core::System::GetInstance().GetAndResetPerfStats();
+
+    emu_speed_label->setText(tr("Speed: %1%").arg(results.emulation_speed * 100.0, 0, 'f', 2));
+    game_fps_label->setText(tr("Game: %1 FPS").arg(results.game_fps, 0, 'f', 1));
+    emu_frametime_label->setText(tr("Frame: %1 ms").arg(results.frametime * 1000.0, 0, 'f', 2));
+
+    emu_speed_label->setVisible(true);
+    game_fps_label->setVisible(true);
+    emu_frametime_label->setVisible(true);
+}
+
 bool GMainWindow::ConfirmClose() {
     if (emu_thread == nullptr || !UISettings::values.confirm_before_closing)
         return true;

src/citra_qt/main.h

@@ -127,6 +127,8 @@ private slots:
     void OnCreateGraphicsSurfaceViewer();
 
 private:
+    void UpdateStatusBar();
+
     Ui::MainWindow ui;
 
     GRenderWindow* render_window;
@@ -136,6 +138,7 @@ private:
     QLabel* emu_speed_label = nullptr;
     QLabel* game_fps_label = nullptr;
     QLabel* emu_frametime_label = nullptr;
+    QTimer status_bar_update_timer;
 
     std::unique_ptr<Config> config;