Revert "Revert the Metal Experiment (#701)"

This reverts commit fe1617ffea.

src/Ryujinx.Graphics.Gpu/Engine/Threed/ComputeDraw/VtgAsComputeContext.cs

@@ -11,8 +11,6 @@ namespace Ryujinx.Graphics.Gpu.Engine.Threed.ComputeDraw
     /// </summary>
     class VtgAsComputeContext : IDisposable
     {
-        private const int DummyBufferSize = 16;
-
         private readonly GpuContext _context;
 
         /// <summary>
@@ -48,7 +46,7 @@ namespace Ryujinx.Graphics.Gpu.Engine.Threed.ComputeDraw
                         1,
                         1,
                         1,
-                        1,
+                        format.GetBytesPerElement(),
                         format,
                         DepthStencilMode.Depth,
                         Target.TextureBuffer,
@@ -521,21 +519,6 @@ namespace Ryujinx.Graphics.Gpu.Engine.Threed.ComputeDraw
             return new BufferRange(_geometryIndexDataBuffer.Handle, offset, size, write);
         }
 
-        /// <summary>
-        /// Gets the range for a dummy 16 bytes buffer, filled with zeros.
-        /// </summary>
-        /// <returns>Dummy buffer range</returns>
-        public BufferRange GetDummyBufferRange()
-        {
-            if (_dummyBuffer == BufferHandle.Null)
-            {
-                _dummyBuffer = _context.Renderer.CreateBuffer(DummyBufferSize, BufferAccess.DeviceMemory);
-                _context.Renderer.Pipeline.ClearBuffer(_dummyBuffer, 0, DummyBufferSize, 0);
-            }
-
-            return new BufferRange(_dummyBuffer, 0, DummyBufferSize);
-        }
-
         /// <summary>
         /// Gets the range for a sequential index buffer, with ever incrementing index values.
         /// </summary>