From 1fa4bcca6a2fb0f37907cf294c2913310490b346 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Wed, 3 Jan 2018 10:43:01 -0800
Subject: [PATCH] Fixed bug 4012 - Wayland: invalid direction on mouse wheel

Vladimir

Invalid direction on mouse wheel

Patch tested in Centos 7 + Weston
---
 src/video/wayland/SDL_waylandevents.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/video/wayland/SDL_waylandevents.c b/src/video/wayland/SDL_waylandevents.c
index 7e4b782045156..3b07962b9c7de 100644
--- a/src/video/wayland/SDL_waylandevents.c
+++ b/src/video/wayland/SDL_waylandevents.c
@@ -337,10 +337,10 @@ pointer_handle_axis_common(struct SDL_WaylandInput *input,
         switch (a) {
             case WL_POINTER_AXIS_VERTICAL_SCROLL:
                 x = 0;
-                y = (float)wl_fixed_to_double(value);
+                y = 0 - (float)wl_fixed_to_double(value);
                 break;
             case WL_POINTER_AXIS_HORIZONTAL_SCROLL:
-                x = (float)wl_fixed_to_double(value);
+                x = 0 - (float)wl_fixed_to_double(value);
                 y = 0;
                 break;
             default: