Continue working on RHI

Ghost.Graphics/Data/CBufferCache.cs

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+using Ghost.Graphics.D3D12;
+using Misaki.HighPerformance.LowLevel.Buffer;
+using Misaki.HighPerformance.LowLevel.Collections;
+using Misaki.HighPerformance.LowLevel.Helpers;
+using System.Runtime.CompilerServices;
+
+namespace Ghost.Graphics.Data;
+
+internal struct CBufferCache : IDisposable
+{
+    public UnsafeArray<byte> CpuData
+    {
+        get;
+        set;
+    }
+
+    public GraphicsBuffer GpuResource
+    {
+        get;
+    }
+
+    private readonly uint _alignedSize;
+
+    internal unsafe CBufferCache(uint bufferSize)
+    {
+        _alignedSize = (bufferSize + 255u) & ~255u;
+
+        CpuData = new((int)_alignedSize, Allocator.Persistent);
+        GpuResource = GraphicsBuffer.Create(_alignedSize, GraphicsBuffer.Usage.Constant);
+        GpuResource.Name = "Material_CBufferCache";
+
+        UploadToGpu();
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public readonly void UploadToGpu()
+    {
+        GpuResource.SetData(CpuData.AsSpan(), 0);
+    }
+
+    public readonly void Dispose()
+    {
+        CpuData.Dispose();
+        GpuResource.Dispose();
+    }
+}