From 4d8f86a27c85cb5473a113e9f9c74bbcde22deba Mon Sep 17 00:00:00 2001
From: Laurens Holst <laurens@grauw.nl>
Date: Sun, 1 May 2022 17:25:27 +0200
Subject: [PATCH] Fix horizontal scroll direction on macOS.

See open Dear ImGUI issue:
https://github.com/ocornut/imgui/issues/4019

This patches it for macOS in the local copy of imgui_impl_sdl.
---
 extern/imgui_patched/imgui_impl_sdl.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/extern/imgui_patched/imgui_impl_sdl.cpp b/extern/imgui_patched/imgui_impl_sdl.cpp
index 2870d2170..c1b2649ca 100644
--- a/extern/imgui_patched/imgui_impl_sdl.cpp
+++ b/extern/imgui_patched/imgui_impl_sdl.cpp
@@ -300,6 +300,9 @@ bool ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event)
         {
             float wheel_x = (event->wheel.x > 0) ? 1.0f : (event->wheel.x < 0) ? -1.0f : 0.0f;
             float wheel_y = (event->wheel.y > 0) ? 1.0f : (event->wheel.y < 0) ? -1.0f : 0.0f;
+#ifdef __APPLE__
+            wheel_x = -wheel_x;
+#endif
             io.AddMouseWheelEvent(wheel_x, wheel_y);
             return true;
         }