From 54b58d3a24fe4bf60163757455679b4b3ffbaded Mon Sep 17 00:00:00 2001
From: Laura Hermanns <lukas.hermanns90@gmail.com>
Date: Wed, 12 Jun 2024 09:30:49 -0400
Subject: [PATCH] [Metal] Use 'setDisplaySyncEnabled' on CAMetalLayer to
 control vsync in MTSwapChain (fixes #117).

---
 sources/Renderer/Metal/MTSwapChain.mm | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/sources/Renderer/Metal/MTSwapChain.mm b/sources/Renderer/Metal/MTSwapChain.mm
index 5cdca812ff..32264ce8c9 100644
--- a/sources/Renderer/Metal/MTSwapChain.mm
+++ b/sources/Renderer/Metal/MTSwapChain.mm
@@ -123,11 +123,14 @@ - (void)mtkView:(nonnull MTKView *)view drawableSizeWillChange:(CGSize)size
             view_.preferredFramesPerSecond = static_cast<NSInteger>(display->GetDisplayMode().refreshRate / vsyncInterval);
         else
             view_.preferredFramesPerSecond = defaultRefreshRate / static_cast<NSInteger>(vsyncInterval);
+
+        /* Enable display sync in CAMetalLayer */
+        [(CAMetalLayer*)[view_ layer] setDisplaySyncEnabled:YES];
     }
     else
     {
-        /* Set preferred frame rate to default value */
-        view_.preferredFramesPerSecond = defaultRefreshRate;
+        /* Disable display sync in CAMetalLayer */
+        [(CAMetalLayer*)[view_ layer] setDisplaySyncEnabled:NO];
     }
     return true;
 }