[mutter] wayland/tablet-tool: Fix stylus input with HiDPI scaling

[Jonas Ådahl <jadahl src gnome org>]

commit 7b97c7b35eeb42fc01eb438dbaba66c222810962
Author: Dorian Stoll <dorian stoll tmsp io>
Date:   Sun Oct 6 14:52:09 2019 +0200

    wayland/tablet-tool: Fix stylus input with HiDPI scaling
    
    After commit 75cffd0e ("shaped-texture: Implement ClutterContent"), the
    input to the meta_wayland_tablet_tool_get_relative_coordinates function
    is already scaled correctly. By scaling it again, all stylus events are
    getting mapped to the screen incorrectly (for anything != 100% scaling).
    
    See also: d3f30d9e
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/830

 src/wayland/meta-wayland-tablet-tool.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/wayland/meta-wayland-tablet-tool.c b/src/wayland/meta-wayland-tablet-tool.c
index fd491fa50..c02831d73 100644
--- a/src/wayland/meta-wayland-tablet-tool.c
+++ b/src/wayland/meta-wayland-tablet-tool.c
@@ -662,8 +662,8 @@ meta_wayland_tablet_tool_get_relative_coordinates (MetaWaylandTabletTool *tool,
   clutter_event_get_coords (event, &xf, &yf);
   meta_wayland_surface_get_relative_coordinates (surface, xf, yf, &xf, &yf);
 
-  *sx = wl_fixed_from_double (xf) / surface->scale;
-  *sy = wl_fixed_from_double (yf) / surface->scale;
+  *sx = wl_fixed_from_double (xf);
+  *sy = wl_fixed_from_double (yf);
 }
 
 static void