From 0a8049e30c97acac5ae5f55a722173dfbc20cd25 Mon Sep 17 00:00:00 2001
From: Bastien Bouclet <bastien.bouclet@gmail.com>
Date: Thu, 27 Jun 2019 20:03:24 +0200
Subject: [PATCH] SDL: Fix gamepad mouse cursor wrapping on hi-res screens

The cursor position was overflowing a signed 16-bits integer once
multiplied with MULTIPLIER when using a resolution such as 2560x1440.

It would be nice changing this code to make more sense, sadly it is
thightly coupled with platform specific subclasses.

Fixes #10996.
---
 backends/events/sdl/sdl-events.cpp | 4 ++--
 backends/events/sdl/sdl-events.h   | 3 ++-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/backends/events/sdl/sdl-events.cpp b/backends/events/sdl/sdl-events.cpp
index 50235171f57..29be7d4e746 100644
--- a/backends/events/sdl/sdl-events.cpp
+++ b/backends/events/sdl/sdl-events.cpp
@@ -287,8 +287,8 @@ void SdlEventSource::updateKbdMouse() {
 }
 
 bool SdlEventSource::handleKbdMouse(Common::Event &event) {
-	int16 oldKmX = _km.x;
-	int16 oldKmY = _km.y;
+	int32 oldKmX = _km.x;
+	int32 oldKmY = _km.y;
 
 	updateKbdMouse();
 
diff --git a/backends/events/sdl/sdl-events.h b/backends/events/sdl/sdl-events.h
index 8ee51147a40..c2ae0023ceb 100644
--- a/backends/events/sdl/sdl-events.h
+++ b/backends/events/sdl/sdl-events.h
@@ -66,7 +66,8 @@ protected:
 	//@{
 
 	struct KbdMouse {
-		int16 x, y, x_vel, y_vel, x_max, y_max, x_down_count, y_down_count, joy_x, joy_y;
+		int32 x, y;
+		int16 x_vel, y_vel, x_max, y_max, x_down_count, y_down_count, joy_x, joy_y;
 		uint32 last_time, delay_time, x_down_time, y_down_time;
 		bool modifier;
 	};