Added RenderPipelineBase

src/Runtime/Ghost.Core/Ghost.Core.csproj

@@ -22,7 +22,7 @@
   <ItemGroup>
     <PackageReference Include="Misaki.HighPerformance" Version="1.0.4" />
     <PackageReference Include="Misaki.HighPerformance.Jobs" Version="1.3.1" />
-    <PackageReference Include="Misaki.HighPerformance.LowLevel" Version="1.3.8">
+    <PackageReference Include="Misaki.HighPerformance.LowLevel" Version="1.3.9">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>

src/Runtime/Ghost.Engine/Components/Camera.cs

@@ -0,0 +1,34 @@
+using Ghost.Core;
+using Ghost.Entities;
+using Ghost.Graphics.Core;
+using Ghost.Graphics.RHI;
+using Misaki.HighPerformance.Mathematics;
+
+namespace Ghost.Engine.Components;
+
+[RequireComponent<LocalToWorld>]
+public unsafe struct Camera : IComponent
+{
+    public float nearClipPlane;
+    public float farClipPlane;
+
+    public float2 sensorSize;
+    public GateFit gateFit;
+    public float iso;
+    public float shutterSpeed;
+    public float aperture;
+    public float focalLength;
+    public float focusDistance;
+
+    public RenderingLayerMask renderingLayerMask;
+
+    public int swapChainIndex; // The index of the swap chain to render to. -1 means render to rt only.
+    public int priority;
+
+    public Handle<Texture> colorTarget;
+    public Handle<Texture> depthTarget;
+    // TODO: Add more render targets like motion vector, etc.
+
+    // Custim render function. If it's not null, the render system will call this function instead of the default render pipeline.
+    public delegate*<ref readonly RenderingContext, ref readonly RenderRequest, void> renderFunc;
+}

src/Runtime/Ghost.Entities/Component.cs

@@ -6,12 +6,14 @@ using System.Runtime.CompilerServices;
 
 namespace Ghost.Entities;
 
-public interface IComponent
+public interface IComponent;
-{
+public interface IEnableableComponent : IComponent;
-}
 
-public interface IEnableableComponent : IComponent
+[AttributeUsage(AttributeTargets.Struct)]
+public class RequireComponentAttribute<T> : Attribute
+    where T : unmanaged, IComponent
 {
+    public Type RequiredType => typeof(T);
 }
 
 internal struct ComponentInfo

src/Runtime/Ghost.Graphics.D3D12/D3D12RenderDevice.cs

@@ -116,7 +116,7 @@ internal unsafe class D3D12RenderDevice : IRenderDevice
                 support |= FeatureSupport.BindlessResources;
             }
 
-            if (options.ResourceHeapTier == D3D12_RESOURCE_HEAP_TIER.D3D12_RESOURCE_HEAP_TIER_2)
+            if (options.ResourceHeapTier == D3D12_RESOURCE_HEAP_TIER_2)
             {
                 support |= FeatureSupport.AliasBuffersAndTextures;
             }

src/Runtime/Ghost.Graphics/Core/RenderList.cs

@@ -12,7 +12,7 @@ public record struct RenderRecord
 
 public struct RenderList : IDisposable
 {
-    public unsafe ref struct Reader
+    public unsafe ref struct Enumerator
     {
         private readonly UnsafeList<RenderRecord>* pList;
         private readonly int length;
@@ -20,7 +20,7 @@ public struct RenderList : IDisposable
         private int _listIndex;
         private int _itemIndex;
 
-        internal Reader(RenderList List)
+        internal Enumerator(RenderList List)
         {
             pList = (UnsafeList<RenderRecord>*)List._threadLocalRecords.GetUnsafePtr();
             length = List._threadLocalRecords.Length;
@@ -59,8 +59,16 @@ public struct RenderList : IDisposable
 
     private UnsafeArray<UnsafeList<RenderRecord>> _threadLocalRecords;
 
+    public readonly int ThreadLocalCount => _threadLocalRecords.Length;
+    public readonly bool IsCreated => _threadLocalRecords.IsCreated;
+
     public RenderList(int maxLevelOfConcurrency, int capacity, AllocationHandle allocationHandle)
     {
+        if (maxLevelOfConcurrency <= 0)
+        {
+            throw new ArgumentOutOfRangeException(nameof(maxLevelOfConcurrency), "Max level of concurrency must be greater than zero.");
+        }
+
         _threadLocalRecords = new UnsafeArray<UnsafeList<RenderRecord>>(maxLevelOfConcurrency, allocationHandle);
 
         for (int i = 0; i < maxLevelOfConcurrency; i++)
@@ -74,16 +82,70 @@ public struct RenderList : IDisposable
     {
     }
 
-    public readonly Reader GetEnumerator()
+    private readonly void ThrowIfNotCreated()
     {
-        return new Reader(this);
+        if (!IsCreated)
+        {
+            throw new InvalidOperationException("RenderList is not created.");
+        }
+    }
+
+    public readonly Enumerator GetEnumerator()
+    {
+        ThrowIfNotCreated();
+        return new Enumerator(this);
     }
 
     public readonly void Add(RenderRecord record, int threadIndex)
     {
+        ThrowIfNotCreated();
         _threadLocalRecords[threadIndex].Add(record);
     }
 
+    public readonly ReadOnlyUnsafeCollection<RenderRecord> GetThreadLocalRecords(int threadIndex)
+    {
+        ThrowIfNotCreated();
+        return _threadLocalRecords[threadIndex].AsReadOnly();
+    }
+
+    public readonly void Clear()
+    {
+        ThrowIfNotCreated();
+        for (int i = 0; i < _threadLocalRecords.Length; i++)
+        {
+            _threadLocalRecords[i].Clear();
+        }
+    }
+
+    public readonly void ClearThreadLocal(int threadIndex)
+    {
+        ThrowIfNotCreated();
+        _threadLocalRecords[threadIndex].Clear();
+    }
+
+    public readonly void Append(RenderList other)
+    {
+        if (!IsCreated || !other.IsCreated)
+        {
+            throw new InvalidOperationException("Both RenderLists must be created before appending.");
+        }
+
+        var maxConcurrency = Math.Min(_threadLocalRecords.Length, other._threadLocalRecords.Length);
+        for (int i = 0; i < maxConcurrency; i++)
+        {
+            _threadLocalRecords[i].AddRange(other._threadLocalRecords[i].AsSpan());
+        }
+
+        if (other._threadLocalRecords.Length > _threadLocalRecords.Length)
+        {
+            // Add remaining records from other lists to the first list if other has more thread local lists than this
+            for (int i = _threadLocalRecords.Length; i < other._threadLocalRecords.Length; i++)
+            {
+                _threadLocalRecords[0].AddRange(other._threadLocalRecords[i].AsSpan());
+            }
+        }
+    }
+
     public void Dispose()
     {
         for (int i = 0; i < _threadLocalRecords.Length; i++)

src/Runtime/Ghost.Graphics/Core/RenderRequest.cs

@@ -5,6 +5,15 @@ using System.Runtime.InteropServices;
 
 namespace Ghost.Graphics.Core;
 
+public enum GateFit : uint
+{
+    Vertical,
+    Horizontal,
+    Fill,
+    Overscan,
+    None
+}
+
 [StructLayout(LayoutKind.Sequential, Pack = 4)]
 public struct Frustum
 {
@@ -33,6 +42,7 @@ public struct Frustum
     public float3 corner7;
 }
 
+// Since we are using ByteAddressBuffer in hlsl, we don't need to care about the 16 bytes alignment of the data like in CBuffer.
 [StructLayout(LayoutKind.Sequential, Pack = 4)]
 public struct RenderView
 {
@@ -46,13 +56,14 @@ public struct RenderView
     public float farClipPlane;
 
     public float2 sensorSize;
+    public GateFit gateFit;
     public float iso;
     public float shutterSpeed;
     public float aperture;
     public float focalLength;
     public float focusDistance;
 
-    public uint renderingLayerMask;
+    public RenderingLayerMask renderingLayerMask;
 }
 
 public unsafe struct RenderRequest

src/Runtime/Ghost.Graphics/Core/RenderingLayerMask.cs

@@ -0,0 +1,33 @@
+using System.Diagnostics;
+
+namespace Ghost.Graphics.Core;
+
+public struct RenderingLayerMask
+{
+    private static readonly Dictionary<string, uint> _layerNameToBit = new (32);
+    private static readonly Dictionary<uint, string> _bitToLayerName = new (32);
+
+    internal static void SetLayerName(int layerIndex, string name)
+    {
+        Debug.Assert(layerIndex >= 0 && layerIndex < 32, "Layer index must be between 0 and 31.");
+
+        var bit = 1u << layerIndex;
+        _layerNameToBit[name] = bit;
+        _bitToLayerName[bit] = name;
+    }
+
+    public static uint GetLayerBit(string name)
+    {
+        if (_layerNameToBit.TryGetValue(name, out var bit))
+        {
+            return bit;
+        }
+
+        return ~0u;
+    }
+
+    public uint value;
+
+    public static implicit operator uint(RenderingLayerMask mask) => mask.value;
+    public static implicit operator RenderingLayerMask(uint value) => new RenderingLayerMask { value = value };
+}

src/Runtime/Ghost.Graphics/RenderPasses/SimpleRenderPipeline.cs

@@ -1,5 +0,0 @@
-namespace Ghost.Graphics.RenderPasses;
-
-internal class SimpleRenderPipeline
-{
-}

src/Runtime/Ghost.Graphics/RenderPipeline/GhostRenderPipeline.cs

@@ -3,13 +3,9 @@ using Ghost.Graphics.RHI;
 
 namespace Ghost.Graphics.RenderPipeline;
 
-public partial class GhostRenderPipeline : IRenderPipeline
+public partial class GhostRenderPipeline : RenderPipelineBase
 {
-    public void Render(RenderContext ctx, ReadOnlySpan<RenderRequest> requests)
+    public override void Render(RenderContext ctx, ReadOnlySpan<RenderRequest> requests)
-    {
-    }
-
-    public void Dispose()
     {
     }
 }

src/Runtime/Ghost.Graphics/RenderPipeline/IRenderPipeline.cs

@@ -1,9 +0,0 @@
-using Ghost.Graphics.Core;
-using Ghost.Graphics.RHI;
-
-namespace Ghost.Graphics.RenderPipeline;
-
-public interface IRenderPipeline : IDisposable
-{
-    void Render(RenderContext ctx, ReadOnlySpan<RenderRequest> requests);
-}

src/Runtime/Ghost.Graphics/RenderPipeline/RenderPipeline.cs

@@ -0,0 +1,70 @@
+using Ghost.Graphics.Core;
+using Ghost.Graphics.RHI;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+namespace Ghost.Graphics.RenderPipeline;
+
+public interface IRenderPipeline : IDisposable
+{
+    void AddRenderList(RenderList renderList, string key);
+
+    void Render(RenderContext ctx, ReadOnlySpan<RenderRequest> requests);
+}
+
+public abstract class RenderPipelineBase : IRenderPipeline
+{
+    protected readonly Dictionary<string, RenderList> _renderLists = new();
+
+    private bool _disposed;
+
+    ~RenderPipelineBase()
+    {
+        Dispose();
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    protected void ThrowIfDisposed()
+    {
+        ObjectDisposedException.ThrowIf(_disposed, this);
+    }
+
+    public void AddRenderList(RenderList renderList, string key)
+    {
+        ThrowIfDisposed();
+
+        ref var existingList = ref CollectionsMarshal.GetValueRefOrAddDefault(_renderLists, key, out var exists);
+        if (!exists)
+        {
+            existingList = renderList;
+        }
+        else
+        {
+            existingList.Append(renderList);
+        }
+    }
+
+    public abstract void Render(RenderContext ctx, ReadOnlySpan<RenderRequest> requests);
+
+    public void Dispose()
+    {
+        if (_disposed)
+        {
+            return;
+        }
+
+        Dispose(true);
+
+        foreach (var list in _renderLists.Values)
+        {
+            list.Dispose();
+        }
+
+        _disposed = true;
+        GC.SuppressFinalize(this);
+    }
+
+    public virtual void Dispose(bool disposing)
+    {
+    }
+}

src/Runtime/Ghost.Graphics/SwapChainManager.cs

@@ -0,0 +1,112 @@
+using Ghost.Graphics.RHI;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Ghost.Graphics;
+
+internal sealed class SwapChainRecord
+{
+    private int _refCount;
+
+    public ISwapChain SwapChain { get; }
+
+    public SwapChainRecord(ISwapChain swapChain)
+    {
+        SwapChain = swapChain;
+        _refCount = 1;
+    }
+
+    public bool TryAddRef()
+    {
+        while (true)
+        {
+            int current = Volatile.Read(ref _refCount);
+            if (current == 0) return false; // It's dead, let it go.
+
+            if (Interlocked.CompareExchange(ref _refCount, current + 1, current) == current)
+            {
+                return true; // Successfully atomically incremented
+            }
+        }
+    }
+
+    public bool ReleaseRef()
+    {
+        while (true)
+        {
+            int current = Volatile.Read(ref _refCount);
+            if (current == 0)
+            {
+                return false;
+            }
+
+            if (Interlocked.CompareExchange(ref _refCount, current - 1, current) == current)
+            {
+                return (current - 1) == 0;
+            }
+        }
+    }
+}
+
+internal class SwapChainManager
+{
+    public const int MAX_SWAP_CHAINS = 8;
+    private readonly IGraphicsEngine _graphicsEngine;
+    private readonly SwapChainRecord?[] _swapChains = new SwapChainRecord?[MAX_SWAP_CHAINS];
+
+    public SwapChainManager(IGraphicsEngine graphicsEngine)
+    {
+        _graphicsEngine = graphicsEngine;
+    }
+
+    public ISwapChain EnsureSwapChain(int index, SwapChainDesc desc)
+    {
+        while (true)
+        {
+            var record = Volatile.Read(ref _swapChains[index]);
+
+            if (record != null)
+            {
+                if (record.TryAddRef()) return record.SwapChain;
+
+                Thread.Yield();
+                continue;
+            }
+
+            var newRecord = new SwapChainRecord(_graphicsEngine.CreateSwapChain(desc));
+            var previous = Interlocked.CompareExchange(ref _swapChains[index], newRecord, null);
+
+            if (previous == null)
+            {
+                return newRecord.SwapChain;
+            }
+            else
+            {
+                newRecord.SwapChain.Dispose();
+            }
+        }
+    }
+
+    public bool TryGetSwapChain(int index, [MaybeNullWhen(false)] out ISwapChain swapChain)
+    {
+        var record = Volatile.Read(ref _swapChains[index]);
+        if (record != null && record.TryAddRef())
+        {
+            swapChain = record.SwapChain;
+            return true;
+        }
+
+        swapChain = null;
+        return false;
+    }
+
+    public void ReleaseSwapChain(int index)
+    {
+        var record = Volatile.Read(ref _swapChains[index]);
+
+        if (record != null && record.ReleaseRef())
+        {
+            record.SwapChain.Dispose();
+            Interlocked.CompareExchange(ref _swapChains[index], null, record);
+        }
+    }
+}