From 292581f87c101f85397a15ce6f7619fc5eeb2b22 Mon Sep 17 00:00:00 2001
From: Lephenixnoir <sebastien.michelland@protonmail.com>
Date: Thu, 5 Aug 2021 09:51:35 +0200
Subject: [PATCH] Fix FPS counter not acocunting for frameskip

---
 cgdoom/i_system.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/cgdoom/i_system.c b/cgdoom/i_system.c
index d6f8366..62040a0 100644
--- a/cgdoom/i_system.c
+++ b/cgdoom/i_system.c
@@ -331,10 +331,11 @@ void I_StartTic (void)
 
     extern boolean fpscounteractive;
     extern int fpscounter_data;
+    extern int giRefreshMask;
 
     /* Number of frames since FPS count started */
     static int fps_frames = 0;
-    /* Time when the FPS count started */
+    /* RTC time when the FPS count started */
     static int fps_ticks = -1;
 
     if(fps_ticks < 0)
@@ -343,7 +344,10 @@ void I_StartTic (void)
     if(++fps_frames >= 16)
     {
         int now = RTC_GetTicks();
-        fpscounter_data = (now == fps_ticks) ? -1 : 128 * fps_frames / (now - fps_ticks);
+        if (now == fps_ticks)
+            fpscounter_data = -1;
+        else
+            fpscounter_data = 128 * fps_frames / ((now - fps_ticks) * (giRefreshMask + 1));
 
         fps_ticks = now;
         fps_frames = 0;