From a817f7eb24f8166685a679298ae3bab1924158bf Mon Sep 17 00:00:00 2001
From: Sergey Fedorov <barracuda@macos-powerpc.org>
Date: Fri, 7 Aug 2026 03:17:02 +0000
Subject: [PATCH 21/38] displayserver: add ffdsParseRefreshRate() for
 CG_LEGACY_API targets

Rounds a raw legacy CoreGraphics refresh-rate mode value to the nearest
typical rate, mirroring what CGDisplayModeGetRefreshRate() provides on
newer systems.

Ported from https://github.com/macos-powerpc/powerpc-ports/blob/main/sysutils/fastfetch/files/0012-Misc-fixes-for-legacy-systems.patch
---
 src/detection/displayserver/displayserver.c | 22 +++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/src/detection/displayserver/displayserver.c b/src/detection/displayserver/displayserver.c
index b5cc8eb7d..e3acafe5d 100644
--- a/src/detection/displayserver/displayserver.c
+++ b/src/detection/displayserver/displayserver.c
@@ -1,5 +1,27 @@
 #include "displayserver.h"
 
+#ifdef CG_LEGACY_API
+
+uint32_t ffdsParseRefreshRate(int32_t refreshRate)
+{
+    if(refreshRate <= 0)
+        return 0;
+
+    int remainder = refreshRate % 5;
+    if(remainder >= 3)
+        refreshRate += (5 - remainder);
+    else
+        refreshRate -= remainder;
+
+    // All other typicall refresh rates are dividable by 5
+    if(refreshRate == 145)
+        refreshRate = 144;
+
+    return (uint32_t) refreshRate;
+}
+
+#endif
+
 FFDisplayResult* ffdsAppendDisplay(
     FFDisplayServerResult* result,
     uint32_t width,
-- 
2.43.0