Inform Coin to use EGL when on Wayland (#21917)

* Inform Coin to use EGL when on Wayland

* Only check for Wayland on Linux and BSD

src/Gui/Application.cpp

@@ -2295,6 +2295,13 @@ void Application::runApplication()
     int argc = App::Application::GetARGC();
     GUISingleApplication mainApp(argc, App::Application::GetARGV());
 
+#if defined(FC_OS_LINUX) || defined(FC_OS_BSD)
+    // If QT is running with native Wayland then inform Coin to use EGL
+    if (QGuiApplication::platformName() == QString::fromStdString("wayland")) {
+        setenv("COIN_EGL", "1", 1);
+    }
+#endif
+    
     // Make sure that we use '.' as decimal point. See also
     // http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=559846
     // and issue #0002891