From cc2c05ba45c8b3cc516837d86bb8513d7b864c91 Mon Sep 17 00:00:00 2001
From: SRSaunders <82544213+SRSaunders@users.noreply.github.com>
Date: Fri, 21 Jun 2024 01:50:07 -0400
Subject: [PATCH] Fix UI overlay scale factor for readable display on iOS
 devices (#1142)

---
 apple/ios/DemoViewController.mm | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/apple/ios/DemoViewController.mm b/apple/ios/DemoViewController.mm
index c15d303a..8b5e530c 100644
--- a/apple/ios/DemoViewController.mm
+++ b/apple/ios/DemoViewController.mm
@@ -36,9 +36,11 @@ CALayer* layer;
 
 	layer = [self.view layer];		// SRS - When creating a Vulkan Metal surface, need the layer backing the view
 
-	self.view.contentScaleFactor = UIScreen.mainScreen.nativeScale;
+	layer.contentsScale = UIScreen.mainScreen.nativeScale;
 
-	_mvkExample = new MVKExample(self.view, 1.0f);		// SRS - Use 1x scale factor for UIOverlay on iOS
+	// SRS - Calculate UI overlay scale factor based on backing layer scale factor and device type for readable UIOverlay on iOS devices
+	auto UIOverlayScale = layer.contentsScale * ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPhone ? 2.0/3.0 : 1.0 );
+	_mvkExample = new MVKExample(self.view, UIOverlayScale);
 	
 	// SRS - Enable AppDelegate to call into DemoViewController for handling app lifecycle events (e.g. termination)
 	auto appDelegate = (AppDelegate *)UIApplication.sharedApplication.delegate;