Buffer improvements

Bearded.Graphics/Core/BufferStream.cs

@@ -77,11 +77,11 @@ public void Add(T item0, T item1, T item2, T item3)
             IsDirty = true;
         }
 
-        public void Add(T[] items)
+        public void Add(ReadOnlySpan<T> items)
         {
             var newCount = Count + items.Length;
             ensureCapacity(newCount);
-            Array.Copy(items, 0, data, Count, items.Length);
+            items.CopyTo(data.AsSpan(Count));
             Count = newCount;
             IsDirty = true;
         }

Bearded.Graphics/Pipelines/Pipeline.Extensions.cs

@@ -8,7 +8,7 @@ public static partial class Pipeline
     {
         public static IPipeline<TState> Then<TState>(this IPipeline<TState> basePipeline, IPipeline<TState> continuation)
         {
-            return new Composite<TState>(basePipeline, continuation);
+            return new Composite<TState>([basePipeline, continuation]);
         }
 
         public static IPipeline<TStateOuter> Elevate<TStateInner, TStateOuter>(

Bearded.Graphics/Pipelines/Pipeline.cs

@@ -1,3 +1,4 @@
+using System.Collections.Generic;
 using Bearded.Graphics.Pipelines.Steps;
 
 namespace Bearded.Graphics.Pipelines
@@ -18,5 +19,10 @@ public static IPipeline<TState> InOrder(params IPipeline<TState>[] steps)
         {
             return new Composite<TState>(steps);
         }
+
+        public static IPipeline<TState> InOrder(IEnumerable<IPipeline<TState>> steps)
+        {
+            return new Composite<TState>(steps);
+        }
     }
 }

Bearded.Graphics/Pipelines/Steps/Composite.cs

@@ -3,15 +3,10 @@
 
 namespace Bearded.Graphics.Pipelines.Steps
 {
-    sealed class Composite<TState> : IPipeline<TState>
+    sealed class Composite<TState>(IEnumerable<IPipeline<TState>> steps) : IPipeline<TState>
     {
         private bool flattened;
-        private ImmutableArray<IPipeline<TState>> steps;
-
-        public Composite(params IPipeline<TState>[] steps)
-        {
-            this.steps = steps.ToImmutableArray();
-        }
+        private ImmutableArray<IPipeline<TState>> steps = steps.ToImmutableArray();
 
         public void Execute(TState state)
         {