From c31c3848df45932ea1229e5b3b76ab0b308b42e7 Mon Sep 17 00:00:00 2001
From: Christian Hergert <chergert@redhat.com>
Date: Wed, 4 Nov 2020 18:02:04 -0800
Subject: [PATCH] macos: fix calculation of mouse position

This fixes the calculation of the position of the pointer over the surface
which was incorrectly providing negative values.
---
 gdk/macos/gdkmacossurface.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gdk/macos/gdkmacossurface.c b/gdk/macos/gdkmacossurface.c
index 9925407d46..2360e1c476 100644
--- a/gdk/macos/gdkmacossurface.c
+++ b/gdk/macos/gdkmacossurface.c
@@ -256,7 +256,7 @@ gdk_macos_surface_get_device_state (GdkSurface      *surface,
         | _gdk_macos_display_get_current_mouse_modifiers (GDK_MACOS_DISPLAY (display));
 
   *x = point.x;
-  *y = point.y - surface->height;
+  *y = surface->height - point.y;
 
   return *x >= 0 && *y >= 0 && *x < surface->width && *y < surface->height;
 }