From 40072ff1abfbffb975c010b561df078b80c79b43 Mon Sep 17 00:00:00 2001
From: Aki <75532970+AkiSakurai@users.noreply.github.com>
Date: Fri, 31 Jan 2025 10:59:06 +0800
Subject: [PATCH] macos: Fix inverted pen Y tilt on macOS

- Negate tilt.y in Cocoa pen handling to correct inverted Y tilt axis
- see https://github.com/qt/qtbase/blob/0f128fd7c5a9ee721d1e631743f6eb61d927cf3b/src/plugins/platforms/cocoa/qnsview_tablet.mm#L63
- see https://source.chromium.org/chromium/chromium/src/+/main:components/input/web_input_event_builders_mac.mm;drc=0af5ffa1e4cc4cc4f818725f8fee93ec57855e4b;l=421
---
 gdk/quartz/gdkevents-quartz.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gdk/quartz/gdkevents-quartz.c b/gdk/quartz/gdkevents-quartz.c
index 714b6a9556..0c35436bfa 100644
--- a/gdk/quartz/gdkevents-quartz.c
+++ b/gdk/quartz/gdkevents-quartz.c
@@ -1088,7 +1088,7 @@ fill_button_event (GdkWindow *window,
       axes[1] = y;
       axes[2] = [nsevent pressure];
       axes[3] = [nsevent tilt].x;
-      axes[4] = [nsevent tilt].y;
+      axes[4] = -[nsevent tilt].y;
     }
 
   event->any.type = type;
@@ -1131,7 +1131,7 @@ fill_motion_event (GdkWindow *window,
       axes[1] = y;
       axes[2] = [nsevent pressure];
       axes[3] = [nsevent tilt].x;
-      axes[4] = [nsevent tilt].y;
+      axes[4] = -[nsevent tilt].y;
     }
 
   event->any.type = GDK_MOTION_NOTIFY;