From af6ff15ee227951475fa97e598d9e489334f6d69 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sat, 2 Jun 2018 13:25:33 +0530
Subject: [PATCH] Wayland: Fix wheel/touchpad scrolling in opposite direction

Workaround for glfw bug. Fixes #594
---
 kitty/mouse.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kitty/mouse.c b/kitty/mouse.c
index 1d636b811..6eb5b0204 100644
--- a/kitty/mouse.c
+++ b/kitty/mouse.c
@@ -416,6 +416,9 @@ mouse_event(int button, int modifiers) {
 
 void
 scroll_event(double UNUSED xoffset, double yoffset) {
+    // glfw inverts the y-axis when reporting scroll events under wayland
+    // Until this is fixed in upstream, invert y ourselves.
+    if (global_state.is_wayland) yoffset *= -1;
     int s = (int) round(yoffset * OPT(wheel_scroll_multiplier));
     if (s == 0) return;
     bool upwards = s > 0;