From 65149cfe9ff3f65611ed76e4a13490536bda05cb Mon Sep 17 00:00:00 2001
From: Isaac Marovitz <isaacryu@icloud.com>
Date: Tue, 28 May 2024 01:45:59 -0400
Subject: [PATCH] Buffer Descriptor Step Functions

---
 src/Ryujinx.Graphics.Metal/EncoderStateManager.cs | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/Ryujinx.Graphics.Metal/EncoderStateManager.cs b/src/Ryujinx.Graphics.Metal/EncoderStateManager.cs
index b2c490ec90..f440a9a608 100644
--- a/src/Ryujinx.Graphics.Metal/EncoderStateManager.cs
+++ b/src/Ryujinx.Graphics.Metal/EncoderStateManager.cs
@@ -740,13 +740,26 @@ namespace Ryujinx.Graphics.Metal
             {
                 var layout = vertexDescriptor.Layouts.Object((ulong)i);
                 layout.Stride = (indexMask & (1u << i)) != 0 ? (ulong)bufferDescriptors[i].Stride : 0;
+
+                if (bufferDescriptors[i].Divisor > 0)
+                {
+                    layout.StepFunction = MTLVertexStepFunction.PerInstance;
+                    layout.StepRate = (ulong)bufferDescriptors[i].Divisor;
+                }
+                else
+                {
+                    layout.StepFunction = MTLVertexStepFunction.PerVertex;
+                    layout.StepRate = 1;
+                }
             }
 
             // Zero buffer
             if ((indexMask & (1u << bufferDescriptors.Length)) != 0)
             {
                 var layout = vertexDescriptor.Layouts.Object((ulong)bufferDescriptors.Length);
-                layout.Stride = ZeroBufferSize;
+                layout.Stride = 1;
+                layout.StepFunction = MTLVertexStepFunction.Constant;
+                layout.StepRate = 0;
             }
 
             return vertexDescriptor;