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fix GetCurrentMonitor() distance calc

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This commit is contained in:
Vasilis 2026-05-15 13:09:18 +02:00
parent fe6be2131e
commit 727271f2ae
1 changed files with 5 additions and 5 deletions
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10
src/platforms/rcore_desktop_glfw.c
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@ -839,7 +839,7 @@ int GetCurrentMonitor(void)
// this is probably an overengineered solution for a side case // this is probably an overengineered solution for a side case
// trying to match SDL behaviour // trying to match SDL behaviour
int closestDist = 0x7FFFFFFF; unsigned int closestDist = 0xFFFFFFFFu;
// Window center position // Window center position
int wcx = 0; int wcx = 0;
@ -884,12 +884,12 @@ int GetCurrentMonitor(void)
int dx = wcx - xclosest; int dx = wcx - xclosest;
int dy = wcy - yclosest; int dy = wcy - yclosest;
// Use unsigned int to avoid signed integer overflow UB. // Unsigned to dodge signed overflow UB; (-x)^2 == x^2 mod 2^32 so sign drops out.
// Note: (-x)^2 == x^2 (mod 2^32), so sign of dx/dy does not matter // If |dx| or |dy| >= 65536, dist wraps and the wrong monitor may win.
// Not a concern for realistic monitor layouts.
unsigned int ux = (unsigned int)dx; unsigned int ux = (unsigned int)dx;
unsigned int uy = (unsigned int)dy; unsigned int uy = (unsigned int)dy;
unsigned int udist = ux*ux + uy*uy; unsigned int dist = ux*ux + uy*uy;
int dist = (int)udist;
if (dist < closestDist) if (dist < closestDist)
{ {