From 10fb3e6d313329ebee2b85e501874cacb950de32 Mon Sep 17 00:00:00 2001
From: daboe01 <daboe01@googlemail.com>
Date: Sat, 20 Jun 2026 14:35:15 +0200
Subject: [PATCH] Fixed: scale accumulation in scaleUnitSquareToSize: when
 setting bounds size

---
 AppKit/CPView.j | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/AppKit/CPView.j b/AppKit/CPView.j
index 31b26f017..e8ac8a4b4 100644
--- a/AppKit/CPView.j
+++ b/AppKit/CPView.j
@@ -1474,6 +1474,21 @@ var CPViewHighDPIDrawingEnabled = YES;
         origin.y *= size.height / frameSize.height;
     }
 
+    [self willChangeValueForKey:@"scaleSize"];
+    if (size.width === 0 || size.height === 0)
+    {
+        _scaleSize = CGSizeMake(1.0, 1.0);
+    }
+    else
+    {
+        _scaleSize = CGSizeMake(frameSize.width / size.width, frameSize.height / size.height);
+    }
+    _isScaled = (_scaleSize.width !== 1.0 || _scaleSize.height !== 1.0);
+    [self didChangeValueForKey:@"scaleSize"];
+
+    // Recompute hierarchy scale size for this view and its descendants
+    [self _scaleSizeUnitSquareToSize:CGSizeMake(1.0, 1.0)];
+
     if (_layer)
         [_layer _owningViewBoundsChanged];