attempt to fix mac build

src/macos/window.rs

@@ -41,9 +41,22 @@ impl Window {
         unsafe {
             let _pool = NSAutoreleasePool::new(nil);
 
+            let scaling = match options.scale {
+                // TODO: Find system scale factor
+                WindowScalePolicy::TrySystemScaleFactor => get_scaling().unwrap_or(1.0),
+                WindowScalePolicy::TrySystemScaleFactorTimes(user_scale) => get_scaling().unwrap_or(1.0) * user_scale,
+                WindowScalePolicy::UseScaleFactor(user_scale) => user_scale,
+                WindowScalePolicy::NoScaling => 1.0,
+            };
+
+            let window_info = options.window_info_from_scale(scaling);
+
             let rect = NSRect::new(
                 NSPoint::new(0.0, 0.0),
-                NSSize::new(options.width as f64, options.height as f64),
+                NSSize::new(
+                    window_info.logical_size().width as f64,
+                    window_info.logical_size().height as f64
+                ),
             );
 
             let ns_window = NSWindow::alloc(nil)
@@ -83,3 +96,8 @@ unsafe impl HasRawWindowHandle for Window {
         })
     }
 }
+
+fn get_scaling() -> Option<f64> {
+    // TODO: find system scaling
+    None
+}