Now viewport_id always will be in a ViewportId you cannot create a ViewportId you can only get the main one everywere or get the current viewport id with Context::get_viewport_id

examples/custom_font_style/src/main.rs

@@ -71,7 +71,7 @@ impl eframe::App for MyApp {
         render: Option<&ViewportRender>,
     ) {
         if let Some(render) = render {
-            render(ctx, ctx.get_viewport_id(), ctx.get_parent_viewport_id());
+            render(ctx);
             return;
         }
         egui::CentralPanel::default().show(ctx, content);