Convert window position to logical coordinates

`ViewportBuilder` expects position to be in logical coordinates, but it was being passed in pixels. To fix, scale by the active monitor size and `egui_zoom_factor`.

crates/eframe/src/native/epi_integration.rs

@@ -39,7 +39,11 @@ pub fn viewport_builder<E>(
         }
         window_settings.clamp_position_to_monitors(egui_zoom_factor, event_loop);
 
-        viewport_builder = window_settings.initialize_viewport_builder(viewport_builder);
+        viewport_builder = window_settings.initialize_viewport_builder(
+            egui_zoom_factor,
+            event_loop,
+            viewport_builder,
+        );
         window_settings.inner_size_points()
     } else {
         if let Some(pos) = viewport_builder.position {

crates/egui-winit/src/window_settings.rs

@@ -50,8 +50,10 @@ impl WindowSettings {
         self.inner_size_points
     }
 
-    pub fn initialize_viewport_builder(
+    pub fn initialize_viewport_builder<E>(
         &self,
+        egui_zoom_factor: f32,
+        event_loop: &winit::event_loop::EventLoopWindowTarget<E>,
         mut viewport_builder: ViewportBuilder,
     ) -> ViewportBuilder {
         crate::profile_function!();
@@ -64,7 +66,15 @@ impl WindowSettings {
             self.outer_position_pixels
         };
         if let Some(pos) = pos_px {
-            viewport_builder = viewport_builder.with_position(pos);
+            let monitor_scale_factor = if let Some(inner_size_points) = self.inner_size_points {
+                find_active_monitor(egui_zoom_factor, event_loop, inner_size_points, &pos)
+                    .map_or(1.0, |monitor| monitor.scale_factor() as f32)
+            } else {
+                1.0
+            };
+
+            let scaled_pos = pos / (egui_zoom_factor * monitor_scale_factor);
+            viewport_builder = viewport_builder.with_position(scaled_pos);
         }
 
         if let Some(inner_size_points) = self.inner_size_points {