display(iOS): fix resize issues

Fixes #6179
utmapp · Mar 30, 2024 · 8bce9d1 · 8bce9d1
1 parent 9846260
commit 8bce9d1
Showing 1 changed file with 8 additions and 3 deletions.
diff --git a/Platform/iOS/Display/VMDisplayMetalViewController+Touch.m b/Platform/iOS/Display/VMDisplayMetalViewController+Touch.m
@@ -459,9 +459,14 @@ - (IBAction)gesturePinch:(UIPinchGestureRecognizer *)sender {
         sender.state == UIGestureRecognizerStateChanged ||
         sender.state == UIGestureRecognizerStateEnded) {
         NSAssert(sender.scale > 0, @"sender.scale cannot be 0");
-        self.vmDisplay.viewportScale *= sender.scale;
-        // persist this change in viewState
-        self.delegate.displayScale = self.vmDisplay.viewportScale;
+        CGFloat scaling;
+        if (!self.delegate.qemuDisplayIsNativeResolution) {
+            // will be undo in `-setDisplayScaling:origin:`
+            scaling = CGPixelToPoint(CGPointToPixel(self.delegate.displayScale) * sender.scale);
+        } else {
+            scaling = self.delegate.displayScale * sender.scale;
+        }
+        self.delegate.displayScale = scaling;
         sender.scale = 1.0;
     }
 }