From 5c7d9d01bae7b279b7d95a37577f782c51847d5b Mon Sep 17 00:00:00 2001
From: Jonah Williams <jonahwilliams@google.com>
Date: Sun, 22 Dec 2024 10:11:21 -0800
Subject: [PATCH] [Impeller] fix device buffer nullptr on Intel macOS.
 (#160645)

Fixes https://github.com/flutter/flutter/issues/159278

macOS intel devices uses MTLResourceStorageModeManaged which is still
host visible
---
 .../impeller/renderer/backend/metal/device_buffer_mtl.mm  | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/engine/src/flutter/impeller/renderer/backend/metal/device_buffer_mtl.mm b/engine/src/flutter/impeller/renderer/backend/metal/device_buffer_mtl.mm
index 4d0e053fc6..6d5d846ace 100644
--- a/engine/src/flutter/impeller/renderer/backend/metal/device_buffer_mtl.mm
+++ b/engine/src/flutter/impeller/renderer/backend/metal/device_buffer_mtl.mm
@@ -23,9 +23,17 @@ id<MTLBuffer> DeviceBufferMTL::GetMTLBuffer() const {
 }
 
 uint8_t* DeviceBufferMTL::OnGetContents() const {
+#if !FML_OS_IOS
+  if (storage_mode_ != MTLStorageModeShared &&
+      storage_mode_ != MTLResourceStorageModeManaged) {
+    return nullptr;
+  }
+#else
   if (storage_mode_ != MTLStorageModeShared) {
     return nullptr;
   }
+#endif  // !FML_OS_IOS
+
   return reinterpret_cast<uint8_t*>(buffer_.contents);
 }