Refactoring Rendering backend

Ghost.Graphics/Data/ResourceHandle.cs

@@ -1,148 +1,30 @@
-using System.Runtime.CompilerServices;
-using Win32.Graphics.D3D12MemoryAllocator;
+using Ghost.Core;
 
 namespace Ghost.Graphics.Data;
 
-public readonly struct ResourceHandle : IEquatable<ResourceHandle>
+public readonly struct GPUResource : IHandleType;
+public readonly struct Texture : IHandleType;
+public readonly struct GraphicsBuffer : IHandleType;
+
+public static class ResourceHandleExtensions
 {
-    private const int _INVALID_ID = -1;
-
-    public readonly int id;
-    public readonly int generation;
-
-    public static ResourceHandle Invalid => new(_INVALID_ID, _INVALID_ID);
-
-    internal ResourceHandle(int id, int generation)
+    public static Handle<GPUResource> AsResource(this Handle<Texture> texture)
     {
-        this.id = id;
-        this.generation = generation;
+        return new Handle<GPUResource>(texture.id, texture.generation);
     }
 
-    public bool IsValid => id != _INVALID_ID && generation != _INVALID_ID;
-
-    public bool Equals(ResourceHandle other)
+    public static Handle<GPUResource> AsResource(this Handle<GraphicsBuffer> buffer)
     {
-        return id == other.id && generation == other.generation;
+        return new Handle<GPUResource>(buffer.id, buffer.generation);
     }
 
-    public override int GetHashCode()
+    internal static Handle<Texture> AsTexture(this Handle<GPUResource> resource)
     {
-        unchecked
-        {
-            return (id * 397) ^ generation;
-        }
+        return new Handle<Texture>(resource.id, resource.generation);
     }
 
-    public override bool Equals(object? obj)
+    internal static Handle<GraphicsBuffer> AsGraphicsBuffer(this Handle<GPUResource> resource)
     {
-        return obj is ResourceHandle handle && Equals(handle);
-    }
-
-    public static bool operator ==(ResourceHandle left, ResourceHandle right)
-    {
-        return left.Equals(right);
-    }
-
-    public static bool operator !=(ResourceHandle left, ResourceHandle right)
-    {
-        return !(left == right);
-    }
-}
-
-public readonly struct TextureHandle : IEquatable<TextureHandle>
-{
-    private readonly ResourceHandle _resourceHandle;
-    private readonly BindlessDescriptor _bindlessDescriptor;
-
-    public ResourceHandle ResourceHandle => _resourceHandle;
-    public static TextureHandle Invalid => new(ResourceHandle.Invalid);
-
-    internal TextureHandle(ResourceHandle resourceHandle)
-    {
-        _resourceHandle = resourceHandle;
-        _bindlessDescriptor = BindlessDescriptor.Invalid;
-    }
-
-    internal TextureHandle(ResourceHandle resourceHandle, BindlessDescriptor descriptor)
-    {
-        _resourceHandle = resourceHandle;
-        _bindlessDescriptor = descriptor;
-    }
-
-    public bool IsValid => _resourceHandle.IsValid;
-
-    public bool Equals(TextureHandle other)
-    {
-        return _resourceHandle.Equals(other._resourceHandle) && _bindlessDescriptor.Equals(other._bindlessDescriptor);
-    }
-
-    public override bool Equals(object? obj)
-    {
-        return obj is TextureHandle other && Equals(other);
-    }
-
-    public override int GetHashCode()
-    {
-        return HashCode.Combine(_resourceHandle, _bindlessDescriptor);
-    }
-
-    public static bool operator ==(TextureHandle left, TextureHandle right)
-    {
-        return left.Equals(right);
-    }
-
-    public static bool operator !=(TextureHandle left, TextureHandle right)
-    {
-        return !(left == right);
-    }
-}
-
-public readonly struct BufferHandle : IEquatable<BufferHandle>
-{
-    private readonly ResourceHandle _resourceHandle;
-    private readonly BindlessDescriptor _bindlessDescriptor;
-
-    public static BufferHandle Invalid => new(ResourceHandle.Invalid);
-
-    public ResourceHandle ResourceHandle => _resourceHandle;
-    public BindlessDescriptor BindlessDescriptor => _bindlessDescriptor;
-
-    internal BufferHandle(ResourceHandle resourceHandle)
-    {
-        _resourceHandle = resourceHandle;
-        _bindlessDescriptor = BindlessDescriptor.Invalid;
-    }
-
-    internal BufferHandle(ResourceHandle resourceHandle, BindlessDescriptor descriptor)
-    {
-        _resourceHandle = resourceHandle;
-        _bindlessDescriptor = descriptor;
-    }
-
-    public bool IsValid => _resourceHandle.IsValid;
-
-    public bool Equals(BufferHandle other)
-    {
-        return _resourceHandle.Equals(other._resourceHandle) && _bindlessDescriptor.Equals(other._bindlessDescriptor);
-    }
-
-    public override bool Equals(object? obj)
-    {
-        return obj is BufferHandle other && Equals(other);
-    }
-
-    public override int GetHashCode()
-    {
-        return HashCode.Combine(_resourceHandle, _bindlessDescriptor);
-    }
-
-    public static bool operator ==(BufferHandle left, BufferHandle right)
-    {
-        return left.Equals(right);
-    }
-
-    public static bool operator !=(BufferHandle left, BufferHandle right)
-    {
-        return !(left == right);
+        return new Handle<GraphicsBuffer>(resource.id, resource.generation);
     }
 }