From c2562b0917ebeca61a79b123eddb340be74af702 Mon Sep 17 00:00:00 2001
From: Brad Werth <bwerth@mozilla.com>
Date: Thu, 28 Oct 2021 22:47:10 +0000
Subject: [PATCH] Bug 1737998: Prevent macOS 10.12 from using specialized video
 layers. r=mstange

Differential Revision: https://phabricator.services.mozilla.com/D129869
---
 gfx/layers/NativeLayerCA.mm | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/gfx/layers/NativeLayerCA.mm b/gfx/layers/NativeLayerCA.mm
index bfd3d9d497de..f2bcad50dd22 100644
--- a/gfx/layers/NativeLayerCA.mm
+++ b/gfx/layers/NativeLayerCA.mm
@@ -27,8 +27,8 @@
 #include "mozilla/layers/SurfacePoolCA.h"
 #include "mozilla/StaticPrefs_gfx.h"
 #include "mozilla/webrender/RenderMacIOSurfaceTextureHost.h"
+#include "nsCocoaFeatures.h"
 #include "ScopedGLHelpers.h"
-#include "gfxUtils.h"
 
 @interface CALayer (PrivateSetContentsOpaque)
 - (void)setContentsOpaque:(BOOL)opaque;
@@ -758,7 +758,8 @@ bool NativeLayerCA::IsVideoAndLocked(const MutexAutoLock& aProofOfLock) {
 }
 
 bool NativeLayerCA::ShouldSpecializeVideo(const MutexAutoLock& aProofOfLock) {
-  return StaticPrefs::gfx_core_animation_specialize_video() && mRootWindowIsFullscreen &&
+  return StaticPrefs::gfx_core_animation_specialize_video() &&
+         nsCocoaFeatures::OnHighSierraOrLater() && mRootWindowIsFullscreen &&
          IsVideoAndLocked(aProofOfLock);
 }
 
-- 
2.11.4.GIT