From d076a708163e126108e32e17504b1f3878ebff95 Mon Sep 17 00:00:00 2001
From: Isaac Marovitz <isaacryu@icloud.com>
Date: Fri, 28 Jul 2023 16:51:07 -0400
Subject: [PATCH] Clear Buffer

---
 src/Ryujinx.Graphics.Metal/Pipeline.cs | 22 +++++++++++++++++++++-
 src/Ryujinx.Graphics.Metal/Texture.cs  |  1 +
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/Ryujinx.Graphics.Metal/Pipeline.cs b/src/Ryujinx.Graphics.Metal/Pipeline.cs
index f45eba34c0..a0af3c33f3 100644
--- a/src/Ryujinx.Graphics.Metal/Pipeline.cs
+++ b/src/Ryujinx.Graphics.Metal/Pipeline.cs
@@ -92,7 +92,27 @@ namespace Ryujinx.Graphics.Metal
 
         public void ClearBuffer(BufferHandle destination, int offset, int size, uint value)
         {
-            throw new NotImplementedException();
+            MTLBlitCommandEncoder blitCommandEncoder;
+
+            if (_currentEncoder is MTLBlitCommandEncoder encoder)
+            {
+                blitCommandEncoder = encoder;
+            }
+            else
+            {
+                blitCommandEncoder = BeginBlitPass();
+            }
+
+            // Might need a closer look, range's count, lower, and upper bound
+            // must be a multiple of 4
+            MTLBuffer mtlBuffer = new(Unsafe.As<BufferHandle, IntPtr>(ref destination));
+            blitCommandEncoder.FillBuffer(mtlBuffer,
+                new NSRange
+                {
+                    location = (ulong)offset,
+                    length = (ulong)size
+                },
+                (byte)value);
         }
 
         public void ClearRenderTargetColor(int index, int layer, int layerCount, uint componentMask, ColorF color)
diff --git a/src/Ryujinx.Graphics.Metal/Texture.cs b/src/Ryujinx.Graphics.Metal/Texture.cs
index 177582a2b2..1372ba5510 100644
--- a/src/Ryujinx.Graphics.Metal/Texture.cs
+++ b/src/Ryujinx.Graphics.Metal/Texture.cs
@@ -136,6 +136,7 @@ namespace Ryujinx.Graphics.Metal
             throw new NotImplementedException();
         }
 
+        // TODO: Rewrite using MTLBlitCommandEncoder
         public void SetData(SpanOrArray<byte> data, int layer, int level, Rectangle<int> region)
         {
             ulong bytesPerRow = (ulong)Info.GetMipStride(level);