From 1c0491c5c3234635cefa06cbf5cc2f6c4dd3818d Mon Sep 17 00:00:00 2001
From: Sasha Szpakowski <slime73@gmail.com>
Date: Fri, 20 Dec 2024 21:06:27 -0400
Subject: [PATCH] metal: hook up t.graphics.lowpower.

Resolves #2127.
---
 src/modules/graphics/metal/Graphics.mm | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/modules/graphics/metal/Graphics.mm b/src/modules/graphics/metal/Graphics.mm
index 1e3fa2a89..92f79e0dd 100644
--- a/src/modules/graphics/metal/Graphics.mm
+++ b/src/modules/graphics/metal/Graphics.mm
@@ -289,7 +289,21 @@ static inline void setSampler(id<MTLComputeCommandEncoder> encoder, Graphics::Re
 	if (@available(macOS 10.15, iOS 13.0, *))
 	{
 		graphicsInstance = this;
-		device = MTLCreateSystemDefaultDevice();
+#ifdef LOVE_MACOS
+		if (isLowPowerPreferred())
+		{
+			for (id<MTLDevice> dev in MTLCopyAllDevices())
+			{
+				if (dev.isLowPower)
+				{
+					device = dev;
+					break;
+				}
+			}
+		}
+#endif
+		if (device == nil)
+			device = MTLCreateSystemDefaultDevice();
 		if (device == nil)
 			throw love::Exception("Metal is not supported on this system.");
 	}