From 54f98909c8871a57efb40263b215b81f22010b22 Mon Sep 17 00:00:00 2001
From: Antoine Fontaine <antoine.fontaine@epfl.ch>
Date: Sun, 12 Jun 2022 11:48:05 +0200
Subject: [PATCH] Correct relative mouse input handling

Closes https://github.com/DaemonEngine/Daemon/issues/600. Hopefully for
good this time.
---
 CMakeLists.txt               | 15 ---------------
 src/engine/sys/sdl_input.cpp |  9 ---------
 2 files changed, 24 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e8f419e9d4..13e43b6d2a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -615,21 +615,6 @@ endif()
 # SDL, required for all targets on win32 because of iconv and SDL_SetHint(SDL_TIMER_RESOLUTION, 0)
 if (BUILD_CLIENT OR WIN32)
     find_package(SDL2 REQUIRED)
-    # Non-Linux systems use pre-compiled SDL we provide,
-    # so no one of them is using unapproved version.
-    if(LINUX)
-        find_package(SDL2 QUIET CONFIG)
-        if(SDL2_VERSION)
-            if (SDL2_VERSION VERSION_GREATER_EQUAL "2.0.16"
-                AND SDL2_VERSION VERSION_LESS_EQUAL "2.0.20")
-                message(WARNING "SDL ${SDL2_VERSION} between version 2.0.16 and 2.0.20 is known to be buggy, see https://github.com/DaemonEngine/Daemon/issues/600")
-            endif()
-        else()
-            # CMake may be able to find SDL2 without supporting CONFIG
-            # If sdl2-config.cmake or SDL2Config.cmake isn't provided.
-            message(STATUS "SDL version is unknown, version can't be checked for known bugs")
-        endif()
-    endif()
 
     include_directories(${SDL2_INCLUDE_DIR})
 
diff --git a/src/engine/sys/sdl_input.cpp b/src/engine/sys/sdl_input.cpp
index 5361cb5504..83b31e1246 100644
--- a/src/engine/sys/sdl_input.cpp
+++ b/src/engine/sys/sdl_input.cpp
@@ -1082,15 +1082,6 @@ static void IN_ProcessEvents( bool dropInput )
 					else
 					{
 						Com_QueueEvent( Util::make_unique<Sys::MouseEvent>(e.motion.xrel, e.motion.yrel) );
-#if defined( __linux__ ) || defined( __BSD__ )
-						if ( !in_nograb->integer && ( e.motion.xrel || e.motion.yrel ) )
-						{
-							// work around X window managers and edge-based workspace flipping
-							// - without this, we get LeaveNotify, no mouse button events, EnterNotify;
-							//   we would likely miss some button presses and releases.
-							IN_CenterMouse();
-						}
-#endif
 					}
 				}
 				break;