From 0bbe44c4b9df591ecfc451652b79cacb9087276d Mon Sep 17 00:00:00 2001
From: Maxim Nikolenko <maximnproductengine@lindenlab.com>
Date: Mon, 3 Oct 2022 15:52:50 +0300
Subject: SL-17541 simple fallback when refresh rate is unknown

---
 indra/llwindow/llwindowmacosx.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'indra')

diff --git a/indra/llwindow/llwindowmacosx.cpp b/indra/llwindow/llwindowmacosx.cpp
index 66f7e60371..74878df781 100644
--- a/indra/llwindow/llwindowmacosx.cpp
+++ b/indra/llwindow/llwindowmacosx.cpp
@@ -49,6 +49,8 @@ BOOL gHiDPISupport = TRUE;
 const S32	BITS_PER_PIXEL = 32;
 const S32	MAX_NUM_RESOLUTIONS = 32;
 
+const S32   DEFAULT_REFRESH_RATE = 60;
+
 namespace
 {
     NSKeyEventRef mRawKeyEvent = NULL;
@@ -661,6 +663,11 @@ BOOL LLWindowMacOSX::createContext(int x, int y, int width, int height, int bits
 	}
 
     mRefreshRate = CGDisplayModeGetRefreshRate(CGDisplayCopyDisplayMode(mDisplay));
+    if(mRefreshRate == 0)
+    {
+        //consider adding more appropriate fallback later
+        mRefreshRate = DEFAULT_REFRESH_RATE;
+    }
 
 	// Disable vertical sync for swap
     toggleVSync(enable_vsync);
-- 
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