Merge pull request #10142 from Triplelexx/21258

21258 - Don't render (or heavily use GPU) when window in minimized

interface/src/Application.cpp

@@ -1436,6 +1436,7 @@ Application::Application(int& argc, char** argv, QElapsedTimer& startupTimer, bo
     entityPacketSender->setMyAvatar(myAvatar.get());
 
     connect(this, &Application::applicationStateChanged, this, &Application::activeChanged);
+    connect(_window, SIGNAL(windowMinimizedChanged(bool)), this, SLOT(windowMinimizedChanged(bool)));
     qCDebug(interfaceapp, "Startup time: %4.2f seconds.", (double)startupTimer.elapsed() / 1000.0);
 
     auto textureCache = DependencyManager::get<TextureCache>();
@@ -2084,7 +2085,7 @@ void Application::initializeUi() {
 
 void Application::paintGL() {
     // Some plugins process message events, allowing paintGL to be called reentrantly.
-    if (_inPaint || _aboutToQuit) {
+    if (_inPaint || _aboutToQuit || _window->isMinimized()) {
         return;
     }
 
@@ -6486,6 +6487,14 @@ void Application::activeChanged(Qt::ApplicationState state) {
     }
 }
 
+void Application::windowMinimizedChanged(bool minimized) {
+    if (!minimized && !getActiveDisplayPlugin()->isActive()) {
+        getActiveDisplayPlugin()->activate();
+    } else if (minimized && getActiveDisplayPlugin()->isActive()) {
+        getActiveDisplayPlugin()->deactivate();
+    }
+}
+
 void Application::postLambdaEvent(std::function<void()> f) {
     if (this->thread() == QThread::currentThread()) {
         f();

interface/src/Application.h

@@ -415,6 +415,7 @@ private slots:
     void faceTrackerMuteToggled();
 
     void activeChanged(Qt::ApplicationState state);
+    void windowMinimizedChanged(bool minimized);
 
     void notifyPacketVersionMismatch();
 

libraries/ui/src/MainWindow.cpp

@@ -109,8 +109,12 @@ void MainWindow::changeEvent(QEvent* event) {
             stateChangeEvent->oldState() == Qt::WindowMaximized) &&
             windowState() == Qt::WindowMinimized) {
             emit windowShown(false);
+            emit windowMinimizedChanged(true);
         } else {
             emit windowShown(true);
+            if (stateChangeEvent->oldState() == Qt::WindowMinimized) {
+                emit windowMinimizedChanged(false);
+            }
         }
     } else if (event->type() == QEvent::ActivationChange) {
         if (isActiveWindow()) {

libraries/ui/src/MainWindow.h

@@ -29,6 +29,7 @@ public slots:
 signals:
     void windowGeometryChanged(QRect geometry);
     void windowShown(bool shown);
+    void windowMinimizedChanged(bool minimized);
 
 protected:
     virtual void closeEvent(QCloseEvent* event) override;