From fe6be2131e31e84eb94e1aa764a7396891ddd808 Mon Sep 17 00:00:00 2001
From: Vasilis <vasilis.narain@hotmail.it>
Date: Fri, 15 May 2026 11:27:01 +0200
Subject: [PATCH] fix GetCurrentMonitor() distance calc overflow

---
 src/platforms/rcore_desktop_glfw.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/platforms/rcore_desktop_glfw.c b/src/platforms/rcore_desktop_glfw.c
index 191a3130e..58164d36e 100644
--- a/src/platforms/rcore_desktop_glfw.c
+++ b/src/platforms/rcore_desktop_glfw.c
@@ -883,7 +883,14 @@ int GetCurrentMonitor(void)
 
                     int dx = wcx - xclosest;
                     int dy = wcy - yclosest;
-                    int dist = (dx*dx) + (dy*dy);
+
+                    // Use unsigned int to avoid signed integer overflow UB.
+                    // Note: (-x)^2 == x^2 (mod 2^32), so sign of dx/dy does not matter
+                    unsigned int ux = (unsigned int)dx;
+                    unsigned int uy = (unsigned int)dy;
+                    unsigned int udist = ux*ux + uy*uy;
+                    int dist = (int)udist;
+
                     if (dist < closestDist)
                     {
                         index = i;