From 2300f52346b3c4c90da98c7269fe4608613cd205 Mon Sep 17 00:00:00 2001
From: "Matias N. Goldberg" <dark_sylinc@yahoo.com.ar>
Date: Mon, 23 Sep 2024 20:38:13 -0300
Subject: [PATCH] [Metal] Fix Instanced Stereo on iOS / macOS

Fixes #464
---
 Samples/Media/Hlms/Pbs/Metal/VertexShader_vs.metal | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Samples/Media/Hlms/Pbs/Metal/VertexShader_vs.metal b/Samples/Media/Hlms/Pbs/Metal/VertexShader_vs.metal
index 32871626436..418efcda80d 100644
--- a/Samples/Media/Hlms/Pbs/Metal/VertexShader_vs.metal
+++ b/Samples/Media/Hlms/Pbs/Metal/VertexShader_vs.metal
@@ -37,6 +37,9 @@ struct PS_INPUT
 @insertpiece( VStoPS_block )
 	float4 gl_Position [[position]];
 
+	@property( hlms_instanced_stereo )
+		uint gl_ViewportIndex [[viewport_array_index]];
+	@end
 	@property( hlms_pso_clip_distances )
 		float gl_ClipDistance [[clip_distance]] [@value( hlms_pso_clip_distances )];
 	@end