onroad UI optimizations (#20871)

* onroad UI optimizations

* remove that

Co-authored-by: Comma Device <device@comma.ai>
old-commit-hash: 5f5bbd64f2

selfdrive/ui/qt/onroad.cc

@@ -25,6 +25,7 @@ OnroadWindow::OnroadWindow(QWidget *parent) : QWidget(parent) {
   alerts->raise();
 
   setLayout(layout);
+  setAttribute(Qt::WA_OpaquePaintEvent);
 }
 
 // ***** onroad widgets *****
@@ -166,6 +167,11 @@ void OnroadAlerts::paintEvent(QPaintEvent *event) {
   }
 }
 
+
+NvgWindow::NvgWindow(QWidget *parent) : QOpenGLWidget(parent) {
+  setAttribute(Qt::WA_OpaquePaintEvent);
+}
+
 NvgWindow::~NvgWindow() {
   makeCurrent();
   doneCurrent();

selfdrive/ui/qt/onroad.h

@@ -60,7 +60,7 @@ class NvgWindow : public QOpenGLWidget, protected QOpenGLFunctions {
 
 public:
   using QOpenGLWidget::QOpenGLWidget;
-  explicit NvgWindow(QWidget* parent = 0) : QOpenGLWidget(parent) {};
+  explicit NvgWindow(QWidget* parent = 0);
   ~NvgWindow();
 
 protected: