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Ghost.Graphics/D3D12/Descriptors.cs

@@ -2,129 +2,131 @@ using Win32.Graphics.Direct3D12;
 
 namespace Ghost.Graphics.D3D12;
 
-/// <summary>
-/// Base class descriptor implementations.
-/// </summary>
-public abstract class Descriptor
-{
-    protected readonly uint index;
-    protected readonly bool isShaderVisible;
-
-    protected Descriptor(uint index, bool isShaderVisible)
-    {
-        this.index = index;
-        this.isShaderVisible = isShaderVisible;
-    }
-
-    public bool IsValid => index != uint.MaxValue;
-    public uint Index => index;
-    public bool IsShaderVisible => isShaderVisible;
-
-    /// <summary>
-    /// Gets the CPU descriptor handle.
-    /// </summary>
-    public abstract CpuDescriptorHandle CpuHandle
-    {
-        get;
-    }
-
-    /// <summary>
-    /// Gets the GPU descriptor handle (only valid for shader-visible descriptors).
-    /// </summary>
-    public abstract GpuDescriptorHandle GpuHandle
-    {
-        get;
-    }
-}
-
 /// <summary>
 /// Implementation of render target view (RTV) descriptor.
 /// </summary>
-public sealed class RenderTargetDescriptor : Descriptor
+public readonly struct RenderTargetDescriptor
 {
-    private readonly CpuDescriptorHandle _cpuHandle;
-
-    public RenderTargetDescriptor(uint index, CpuDescriptorHandle cpuHandle)
-        : base(index, false)
+    public uint Index
     {
-        _cpuHandle = cpuHandle;
+        get;
     }
 
-    public override CpuDescriptorHandle CpuHandle => _cpuHandle;
-    public override GpuDescriptorHandle GpuHandle => default;
+    public CpuDescriptorHandle CpuHandle
+    {
+        get;
+    }
+
+    public RenderTargetDescriptor(uint index, CpuDescriptorHandle cpuHandle)
+    {
+        Index = index;
+        CpuHandle = cpuHandle;
+    }
 }
 
 /// <summary>
 /// Implementation of depth stencil view (DSV) descriptor.
 /// </summary>
-public sealed class DepthStencilDescriptor : Descriptor
+public readonly struct DepthStencilDescriptor
 {
-    private readonly CpuDescriptorHandle _cpuHandle;
-
-    public DepthStencilDescriptor(uint index, CpuDescriptorHandle cpuHandle)
-        : base(index, false) // DSVs are not shader visible
+    public uint Index
     {
-        _cpuHandle = cpuHandle;
+        get;
     }
 
-    public override CpuDescriptorHandle CpuHandle => _cpuHandle;
-    public override GpuDescriptorHandle GpuHandle => default;
+    public CpuDescriptorHandle CpuHandle
+    {
+        get;
+    }
+
+    public DepthStencilDescriptor(uint index, CpuDescriptorHandle cpuHandle)
+    {
+        Index = index;
+        CpuHandle = cpuHandle;
+    }
 }
 
 /// <summary>
 /// Implementation of shader resource view (SRV) descriptor.
 /// </summary>
-public sealed class ShaderResourceDescriptor : Descriptor
+public sealed class ShaderResourceDescriptor
 {
-    private readonly CpuDescriptorHandle _cpuHandle;
-    private readonly GpuDescriptorHandle _gpuHandle;
-
-    public ShaderResourceDescriptor(uint index, CpuDescriptorHandle cpuHandle, GpuDescriptorHandle gpuHandle)
-        : base(index, true)
+    public uint Index
     {
-        _cpuHandle = cpuHandle;
-        _gpuHandle = gpuHandle;
+        get;
     }
 
-    public override CpuDescriptorHandle CpuHandle => _cpuHandle;
-    public override GpuDescriptorHandle GpuHandle => _gpuHandle;
+    public CpuDescriptorHandle CpuHandle
+    {
+        get;
+    }
+
+    public GpuDescriptorHandle GpuHandle
+    {
+        get;
+    }
+
+    public ShaderResourceDescriptor(uint index, CpuDescriptorHandle cpuHandle, GpuDescriptorHandle gpuHandle)
+    {
+        Index = index;
+        CpuHandle = cpuHandle;
+        GpuHandle = gpuHandle;
+    }
 }
 
 /// <summary>
 /// Implementation of sampler descriptor.
 /// </summary>
-public sealed class SamplerDescriptor : Descriptor
+public sealed class SamplerDescriptor
 {
-    private readonly CpuDescriptorHandle _cpuHandle;
-    private readonly GpuDescriptorHandle _gpuHandle;
-
-    public SamplerDescriptor(uint index, CpuDescriptorHandle cpuHandle, GpuDescriptorHandle gpuHandle)
-        : base(index, true)
+    public uint Index
     {
-        _cpuHandle = cpuHandle;
-        _gpuHandle = gpuHandle;
+        get;
     }
 
-    public override CpuDescriptorHandle CpuHandle => _cpuHandle;
-    public override GpuDescriptorHandle GpuHandle => _gpuHandle;
+    public CpuDescriptorHandle CpuHandle
+    {
+        get;
+    }
+
+    public GpuDescriptorHandle GpuHandle
+    {
+        get;
+    }
+
+    public SamplerDescriptor(uint index, CpuDescriptorHandle cpuHandle, GpuDescriptorHandle gpuHandle)
+    {
+        Index = index;
+        CpuHandle = cpuHandle;
+        GpuHandle = gpuHandle;
+    }
 }
 
 /// <summary>
 /// Implementation of bindless descriptor for SM 6.6 rendering.
 /// This descriptor maintains a 1:1 relationship between allocation indices and shader indices.
 /// </summary>
-public sealed class BindlessDescriptor : Descriptor
+public sealed class BindlessDescriptor
 {
-    private readonly CpuDescriptorHandle _cpuHandle;
-    private readonly GpuDescriptorHandle _gpuHandle;
-
-    public BindlessDescriptor(uint index, CpuDescriptorHandle cpuHandle, GpuDescriptorHandle gpuHandle)
-        : base(index, true)
+    public uint Index
     {
-        _cpuHandle = cpuHandle;
-        _gpuHandle = gpuHandle;
+        get;
     }
 
-    public override CpuDescriptorHandle CpuHandle => _cpuHandle;
-    public override GpuDescriptorHandle GpuHandle => _gpuHandle;
+    public CpuDescriptorHandle CpuHandle
+    {
+        get;
+    }
+
+    public GpuDescriptorHandle GpuHandle
+    {
+        get;
+    }
+
+    public BindlessDescriptor(uint index, CpuDescriptorHandle cpuHandle, GpuDescriptorHandle gpuHandle)
+    {
+        Index = index;
+        CpuHandle = cpuHandle;
+        GpuHandle = gpuHandle;
+    }
 }