replace IBuffer<T> with IMemoryOwner<T>

src/ImageSharp.Drawing/Primitives/ShapeRegion.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using SixLabors.Memory;
 using SixLabors.Primitives;
 using SixLabors.Shapes;
@@ -45,7 +46,7 @@ namespace SixLabors.ImageSharp.Primitives
             var start = new PointF(this.Bounds.Left - 1, y);
             var end = new PointF(this.Bounds.Right + 1, y);
 
-            using (IBuffer<PointF> tempBuffer = configuration.MemoryAllocator.Allocate<PointF>(buffer.Length))
+            using (IMemoryOwner<PointF> tempBuffer = configuration.MemoryAllocator.Allocate<PointF>(buffer.Length))
             {
                 Span<PointF> innerBuffer = tempBuffer.GetSpan();
                 int count = this.Shape.FindIntersections(start, end, innerBuffer);

src/ImageSharp.Drawing/Processing/BrushApplicator.cs

@@ -2,6 +2,8 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
+
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Memory;
@@ -65,8 +67,8 @@ namespace SixLabors.ImageSharp.Processing
         {
             MemoryAllocator memoryAllocator = this.Target.MemoryAllocator;
 
-            using (IBuffer<float> amountBuffer = memoryAllocator.Allocate<float>(scanline.Length))
-            using (IBuffer<TPixel> overlay = memoryAllocator.Allocate<TPixel>(scanline.Length))
+            using (IMemoryOwner<float> amountBuffer = memoryAllocator.Allocate<float>(scanline.Length))
+            using (IMemoryOwner<TPixel> overlay = memoryAllocator.Allocate<TPixel>(scanline.Length))
             {
                 Span<float> amountSpan = amountBuffer.GetSpan();
                 Span<TPixel> overlaySpan = overlay.GetSpan();

src/ImageSharp.Drawing/Processing/ImageBrush{TPixel}.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Memory;
@@ -118,8 +119,8 @@ namespace SixLabors.ImageSharp.Processing
             internal override void Apply(Span<float> scanline, int x, int y)
             {
                 // Create a span for colors
-                using (IBuffer<float> amountBuffer = this.Target.MemoryAllocator.Allocate<float>(scanline.Length))
-                using (IBuffer<TPixel> overlay = this.Target.MemoryAllocator.Allocate<TPixel>(scanline.Length))
+                using (IMemoryOwner<float> amountBuffer = this.Target.MemoryAllocator.Allocate<float>(scanline.Length))
+                using (IMemoryOwner<TPixel> overlay = this.Target.MemoryAllocator.Allocate<TPixel>(scanline.Length))
                 {
                     Span<float> amountSpan = amountBuffer.GetSpan();
                     Span<TPixel> overlaySpan = overlay.GetSpan();

src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Numerics;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.PixelFormats;
@@ -153,8 +154,8 @@ namespace SixLabors.ImageSharp.Processing
                 int patternY = y % this.pattern.Rows;
                 MemoryAllocator memoryAllocator = this.Target.MemoryAllocator;
 
-                using (IBuffer<float> amountBuffer = memoryAllocator.Allocate<float>(scanline.Length))
-                using (IBuffer<TPixel> overlay = memoryAllocator.Allocate<TPixel>(scanline.Length))
+                using (IMemoryOwner<float> amountBuffer = memoryAllocator.Allocate<float>(scanline.Length))
+                using (IMemoryOwner<TPixel> overlay = memoryAllocator.Allocate<TPixel>(scanline.Length))
                 {
                     Span<float> amountSpan = amountBuffer.GetSpan();
                     Span<TPixel> overlaySpan = overlay.GetSpan();

src/ImageSharp.Drawing/Processing/Processors/Drawing/DrawImageProcessor.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Threading.Tasks;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.PixelFormats;
@@ -134,7 +135,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
 
             MemoryAllocator memoryAllocator = this.Image.GetConfiguration().MemoryAllocator;
 
-            using (IBuffer<float> amount = memoryAllocator.Allocate<float>(width))
+            using (IMemoryOwner<float> amount = memoryAllocator.Allocate<float>(width))
             {
                 amount.GetSpan().Fill(this.Opacity);
 

src/ImageSharp.Drawing/Processing/Processors/Drawing/FillProcessor.cs

@@ -2,10 +2,10 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Threading.Tasks;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
 using SixLabors.Memory;
 using SixLabors.Primitives;
 
@@ -76,7 +76,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
                     startY = 0;
                 }
 
-                using (IBuffer<float> amount = source.MemoryAllocator.Allocate<float>(width))
+                using (IMemoryOwner<float> amount = source.MemoryAllocator.Allocate<float>(width))
                 using (BrushApplicator<TPixel> applicator = this.brush.CreateApplicator(
                     source,
                     sourceRectangle,

src/ImageSharp.Drawing/Processing/Processors/Drawing/FillRegionProcessor.cs

@@ -2,6 +2,8 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
+
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
 using SixLabors.ImageSharp.Utils;
@@ -94,8 +96,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
             using (BrushApplicator<TPixel> applicator = this.Brush.CreateApplicator(source, rect, this.Options))
             {
                 int scanlineWidth = maxX - minX;
-                using (IBuffer<float> bBuffer = source.MemoryAllocator.Allocate<float>(maxIntersections))
-                using (IBuffer<float> bScanline = source.MemoryAllocator.Allocate<float>(scanlineWidth))
+                using (IMemoryOwner<float> bBuffer = source.MemoryAllocator.Allocate<float>(maxIntersections))
+                using (IMemoryOwner<float> bScanline = source.MemoryAllocator.Allocate<float>(scanlineWidth))
                 {
                     bool scanlineDirty = true;
                     float subpixelFraction = 1f / subpixelCount;

src/ImageSharp.Drawing/Processing/Processors/Text/DrawTextProcessor.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Collections.Generic;
 using SixLabors.Fonts;
 using SixLabors.ImageSharp.Advanced;
@@ -336,8 +337,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Text
                 // take the path inside the path builder, scan thing and generate a Buffer2d representing the glyph and cache it.
                 Buffer2D<float> fullBuffer = this.MemoryAllocator.Allocate2D<float>(size.Width + 1, size.Height + 1, AllocationOptions.Clean);
 
-                using (IBuffer<float> bufferBacking = this.MemoryAllocator.Allocate<float>(path.MaxIntersections))
-                using (IBuffer<PointF> rowIntersectionBuffer = this.MemoryAllocator.Allocate<PointF>(size.Width))
+                using (IMemoryOwner<float> bufferBacking = this.MemoryAllocator.Allocate<float>(path.MaxIntersections))
+                using (IMemoryOwner<PointF> rowIntersectionBuffer = this.MemoryAllocator.Allocate<PointF>(size.Width))
                 {
                     float subpixelFraction = 1f / subpixelCount;
                     float subpixelFractionPoint = subpixelFraction / subpixelCount;

src/ImageSharp.Drawing/Processing/RecolorBrush{TPixel}.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Numerics;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.PixelFormats;
@@ -138,8 +139,8 @@ namespace SixLabors.ImageSharp.Processing
             {
                 MemoryAllocator memoryAllocator = this.Target.MemoryAllocator;
 
-                using (IBuffer<float> amountBuffer = memoryAllocator.Allocate<float>(scanline.Length))
-                using (IBuffer<TPixel> overlay = memoryAllocator.Allocate<TPixel>(scanline.Length))
+                using (IMemoryOwner<float> amountBuffer = memoryAllocator.Allocate<float>(scanline.Length))
+                using (IMemoryOwner<TPixel> overlay = memoryAllocator.Allocate<TPixel>(scanline.Length))
                 {
                     Span<float> amountSpan = amountBuffer.GetSpan();
                     Span<TPixel> overlaySpan = overlay.GetSpan();

src/ImageSharp.Drawing/Processing/SolidBrush{TPixel}.cs

@@ -2,6 +2,8 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
+
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Memory;
@@ -65,7 +67,7 @@ namespace SixLabors.ImageSharp.Processing
             /// <summary>
             /// Gets the colors.
             /// </summary>
-            protected IBuffer<TPixel> Colors { get; }
+            protected IMemoryOwner<TPixel> Colors { get; }
 
             /// <summary>
             /// Gets the color for a single pixel.
@@ -96,7 +98,7 @@ namespace SixLabors.ImageSharp.Processing
                 }
                 else
                 {
-                    using (IBuffer<float> amountBuffer = memoryAllocator.Allocate<float>(scanline.Length))
+                    using (IMemoryOwner<float> amountBuffer = memoryAllocator.Allocate<float>(scanline.Length))
                     {
                         Span<float> amountSpan = amountBuffer.GetSpan();
 

src/ImageSharp/Common/Helpers/ParallelFor.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Buffers;
 using System.Threading.Tasks;
 using SixLabors.Memory;
 
@@ -32,23 +33,23 @@ namespace SixLabors.ImageSharp
             int toExclusive,
             Configuration configuration,
             int bufferLength,
-            Action<int, IBuffer<T>> body)
+            Action<int, IMemoryOwner<T>> body)
             where T : struct
         {
             MemoryAllocator memoryAllocator = configuration.MemoryAllocator;
             ParallelOptions parallelOptions = configuration.ParallelOptions;
 
-            IBuffer<T> InitBuffer()
+            IMemoryOwner<T> InitBuffer()
             {
                 return memoryAllocator.Allocate<T>(bufferLength);
             }
 
-            void CleanUpBuffer(IBuffer<T> buffer)
+            void CleanUpBuffer(IMemoryOwner<T> buffer)
             {
                 buffer.Dispose();
             }
 
-            IBuffer<T> BodyFunc(int i, ParallelLoopState state, IBuffer<T> buffer)
+            IMemoryOwner<T> BodyFunc(int i, ParallelLoopState state, IMemoryOwner<T> buffer)
             {
                 body(i, buffer);
                 return buffer;

src/ImageSharp/Formats/Gif/LzwDecoder.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.IO;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
@@ -32,17 +33,17 @@ namespace SixLabors.ImageSharp.Formats.Gif
         /// <summary>
         /// The prefix buffer.
         /// </summary>
-        private readonly IBuffer<int> prefix;
+        private readonly IMemoryOwner<int> prefix;
 
         /// <summary>
         /// The suffix buffer.
         /// </summary>
-        private readonly IBuffer<int> suffix;
+        private readonly IMemoryOwner<int> suffix;
 
         /// <summary>
         /// The pixel stack buffer.
         /// </summary>
-        private readonly IBuffer<int> pixelStack;
+        private readonly IMemoryOwner<int> pixelStack;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="LzwDecoder"/> class

src/ImageSharp/Formats/Gif/LzwEncoder.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.IO;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
@@ -66,12 +67,12 @@ namespace SixLabors.ImageSharp.Formats.Gif
         /// <summary>
         /// The hash table.
         /// </summary>
-        private readonly IBuffer<int> hashTable;
+        private readonly IMemoryOwner<int> hashTable;
 
         /// <summary>
         /// The code table.
         /// </summary>
-        private readonly IBuffer<int> codeTable;
+        private readonly IMemoryOwner<int> codeTable;
 
         /// <summary>
         /// Define the storage for the packet accumulator.

src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegBlockPostProcessor.cs

@@ -9,7 +9,7 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
 {
     /// <summary>
-    /// Encapsulates the implementation of processing "raw" <see cref="IBuffer{T}"/>-s into Jpeg image channels.
+    /// Encapsulates the implementation of processing "raw" jpeg buffers into Jpeg image channels.
     /// </summary>
     [StructLayout(LayoutKind.Sequential)]
     internal struct JpegBlockPostProcessor

src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegImagePostProcessor.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Linq;
 using System.Numerics;
 using SixLabors.ImageSharp.Advanced;
@@ -37,7 +38,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// <summary>
         /// Temporal buffer to store a row of colors.
         /// </summary>
-        private readonly IBuffer<Vector4> rgbaBuffer;
+        private readonly IMemoryOwner<Vector4> rgbaBuffer;
 
         /// <summary>
         /// The <see cref="JpegColorConverter"/> corresponding to the current <see cref="JpegColorSpace"/> determined by <see cref="IRawJpegData.ColorSpace"/>.

src/ImageSharp/Formats/Jpeg/PdfJsPort/Components/PdfJsHuffmanTable.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using SixLabors.Memory;
@@ -48,7 +49,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.PdfJsPort.Components
         public PdfJsHuffmanTable(MemoryAllocator memoryAllocator, ReadOnlySpan<byte> count, ReadOnlySpan<byte> values)
         {
             const int Length = 257;
-            using (IBuffer<short> huffcode = memoryAllocator.Allocate<short>(Length))
+            using (IMemoryOwner<short> huffcode = memoryAllocator.Allocate<short>(Length))
             {
                 ref short huffcodeRef = ref MemoryMarshal.GetReference(huffcode.GetSpan());
 

src/ImageSharp/Image.WrapMemory.cs

@@ -34,8 +34,7 @@ namespace SixLabors.ImageSharp
             ImageMetaData metaData)
             where TPixel : struct, IPixel<TPixel>
         {
-            var buffer = new ConsumedBuffer<TPixel>(pixelMemory);
-            return new Image<TPixel>(config, buffer, width, height, metaData);
+            return new Image<TPixel>(config, pixelMemory, width, height, metaData);
         }
 
         /// <summary>

src/ImageSharp/ImageFrameCollection.cs

@@ -30,7 +30,7 @@ namespace SixLabors.ImageSharp
             this.frames.Add(new ImageFrame<TPixel>(parent.GetConfiguration(), width, height, backgroundColor));
         }
 
-        internal ImageFrameCollection(Image<TPixel> parent, int width, int height, IBuffer<TPixel> consumedBuffer)
+        internal ImageFrameCollection(Image<TPixel> parent, int width, int height, Memory<TPixel> consumedBuffer)
         {
             Guard.NotNull(parent, nameof(parent));
 

src/ImageSharp/ImageFrame{TPixel}.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Numerics;
 using System.Runtime.CompilerServices;
 using System.Threading.Tasks;
@@ -94,7 +95,7 @@ namespace SixLabors.ImageSharp
         /// <summary>
         /// Initializes a new instance of the <see cref="ImageFrame{TPixel}" /> class wrapping an existing buffer.
         /// </summary>
-        internal ImageFrame(Configuration configuration, int width, int height, IBuffer<TPixel> consumedBuffer)
+        internal ImageFrame(Configuration configuration, int width, int height, Memory<TPixel> consumedBuffer)
             : this(configuration, width, height, consumedBuffer, new ImageFrameMetaData())
         {
         }
@@ -106,7 +107,7 @@ namespace SixLabors.ImageSharp
             Configuration configuration,
             int width,
             int height,
-            IBuffer<TPixel> consumedBuffer,
+            Memory<TPixel> consumedBuffer,
             ImageFrameMetaData metaData)
         {
             Guard.NotNull(configuration, nameof(configuration));
@@ -272,7 +273,7 @@ namespace SixLabors.ImageSharp
                 this.Height,
                 this.configuration,
                 this.Width,
-                (int y, IBuffer<Vector4> tempRowBuffer) =>
+                (int y, IMemoryOwner<Vector4> tempRowBuffer) =>
                 {
                     Span<TPixel> sourceRow = this.GetPixelRowSpan(y);
                     Span<TPixel2> targetRow = target.GetPixelRowSpan(y);

src/ImageSharp/Image{TPixel}.cs

@@ -86,7 +86,7 @@ namespace SixLabors.ImageSharp
         /// Initializes a new instance of the <see cref="Image{TPixel}"/> class
         /// consuming an external buffer instance.
         /// </summary>
-        internal Image(Configuration configuration, IBuffer<TPixel> consumedBuffer, int width, int height)
+        internal Image(Configuration configuration, Memory<TPixel> consumedBuffer, int width, int height)
             : this(configuration, consumedBuffer, width, height, new ImageMetaData())
         {
         }
@@ -95,7 +95,7 @@ namespace SixLabors.ImageSharp
         /// Initializes a new instance of the <see cref="Image{TPixel}"/> class
         /// consuming an external buffer instance.
         /// </summary>
-        internal Image(Configuration configuration, IBuffer<TPixel> consumedBuffer, int width, int height, ImageMetaData metadata)
+        internal Image(Configuration configuration, Memory<TPixel> consumedBuffer, int width, int height, ImageMetaData metadata)
         {
             this.configuration = configuration;
             this.PixelType = new PixelTypeInfo(Unsafe.SizeOf<TPixel>() * 8);

src/ImageSharp/Memory/ArrayPoolMemoryAllocator.Buffer{T}.cs

@@ -14,7 +14,6 @@ namespace SixLabors.Memory
     {
         /// <summary>
         /// The buffer implementation of <see cref="ArrayPoolMemoryAllocator"/>.
-        /// In this implementation <see cref="IBuffer{T}.Memory"/> is owned.
         /// </summary>
         private class Buffer<T> : ManagedBufferBase<T>
             where T : struct

src/ImageSharp/Memory/ArrayPoolMemoryAllocator.cs

@@ -89,7 +89,7 @@ namespace SixLabors.Memory
         }
 
         /// <inheritdoc />
-        internal override IBuffer<T> Allocate<T>(int length, AllocationOptions options)
+        internal override IMemoryOwner<T> Allocate<T>(int length, AllocationOptions options = AllocationOptions.None)
         {
             int itemSizeBytes = Unsafe.SizeOf<T>();
             int bufferSizeInBytes = length * itemSizeBytes;

src/ImageSharp/Memory/BasicArrayBuffer.cs

@@ -7,7 +7,7 @@ using System.Runtime.CompilerServices;
 namespace SixLabors.Memory
 {
     /// <summary>
-    /// Wraps an array as an <see cref="IBuffer{T}"/> instance. In this implementation <see cref="IBuffer{T}.Memory"/> is owned.
+    /// Wraps an array as an <see cref="IManagedByteBuffer"/> instance.
     /// </summary>
     internal class BasicArrayBuffer<T> : ManagedBufferBase<T>
         where T : struct

src/ImageSharp/Memory/Buffer2D{T}.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Runtime.CompilerServices;
 using SixLabors.Primitives;
 
@@ -15,19 +16,31 @@ namespace SixLabors.Memory
     internal sealed class Buffer2D<T> : IDisposable
         where T : struct
     {
+        private BufferManager<T> buffer;
+
         /// <summary>
         /// Initializes a new instance of the <see cref="Buffer2D{T}"/> class.
         /// </summary>
         /// <param name="wrappedBuffer">The buffer to wrap</param>
         /// <param name="width">The number of elements in a row</param>
         /// <param name="height">The number of rows</param>
-        public Buffer2D(IBuffer<T> wrappedBuffer, int width, int height)
+        public Buffer2D(BufferManager<T> wrappedBuffer, int width, int height)
         {
-            this.Buffer = wrappedBuffer;
+            this.buffer = wrappedBuffer;
             this.Width = width;
             this.Height = height;
         }
 
+        public Buffer2D(IMemoryOwner<T> ownedMemory, int width, int height)
+            : this(new BufferManager<T>(ownedMemory), width, height)
+        {
+        }
+
+        public Buffer2D(Memory<T> observedMemory, int width, int height)
+            : this(new BufferManager<T>(observedMemory), width, height)
+        {
+        }
+
         /// <summary>
         /// Gets the width.
         /// </summary>
@@ -39,13 +52,13 @@ namespace SixLabors.Memory
         public int Height { get; private set; }
 
         /// <summary>
-        /// Gets the backing <see cref="IBuffer{T}"/>
+        /// Gets the backing <see cref="BufferManager{T}"/>
         /// </summary>
-        public IBuffer<T> Buffer { get; private set; }
+        public BufferManager<T> Buffer => this.buffer;
 
         public Memory<T> Memory => this.Buffer.Memory;
 
-        public Span<T> Span => this.Buffer.GetSpan();
+        public Span<T> Span => this.Memory.Span;
 
         /// <summary>
         /// Gets a reference to the element at the specified position.
@@ -60,7 +73,7 @@ namespace SixLabors.Memory
             {
                 ImageSharp.DebugGuard.MustBeLessThan(x, this.Width, nameof(x));
                 DebugGuard.MustBeLessThan(y, this.Height, nameof(y));
-                Span<T> span = this.Buffer.GetSpan();
+                Span<T> span = this.Span;
                 return ref span[(this.Width * y) + x];
             }
         }
@@ -70,7 +83,7 @@ namespace SixLabors.Memory
         /// </summary>
         public void Dispose()
         {
-            this.Buffer?.Dispose();
+            this.Buffer.Dispose();
         }
 
         /// <summary>
@@ -79,36 +92,15 @@ namespace SixLabors.Memory
         /// </summary>
         public static void SwapOrCopyContent(Buffer2D<T> destination, Buffer2D<T> source)
         {
-            if (source.Buffer.IsMemoryOwner && destination.Buffer.IsMemoryOwner)
-            {
-                SwapContents(destination, source);
-            }
-            else
-            {
-                if (destination.Size() != source.Size())
-                {
-                    throw new InvalidOperationException("SwapOrCopyContents(): buffers should both owned or the same size!");
-                }
-
-                source.Span.CopyTo(destination.Span);
-            }
+            BufferManager<T>.SwapOrCopyContent(ref destination.buffer, ref source.buffer);
+            SwapDimensionData(destination, source);
         }
 
-        /// <summary>
-        /// Swap the contents (<see cref="Buffer"/>, <see cref="Width"/>, <see cref="Height"/>) of the two buffers.
-        /// Useful to transfer the contents of a temporary <see cref="Buffer2D{T}"/> to a persistent <see cref="SixLabors.ImageSharp.ImageFrame{T}.PixelBuffer"/>
-        /// </summary>
-        /// <param name="a">The first buffer</param>
-        /// <param name="b">The second buffer</param>
-        private static void SwapContents(Buffer2D<T> a, Buffer2D<T> b)
+        private static void SwapDimensionData(Buffer2D<T> a, Buffer2D<T> b)
         {
             Size aSize = a.Size();
             Size bSize = b.Size();
 
-            IBuffer<T> temp = a.Buffer;
-            a.Buffer = b.Buffer;
-            b.Buffer = temp;
-
             b.Width = aSize.Width;
             b.Height = aSize.Height;
 

src/ImageSharp/Memory/BufferExtensions.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.IO;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
@@ -11,8 +12,12 @@ namespace SixLabors.Memory
     internal static class BufferExtensions
     {
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static int Length<T>(this IBuffer<T> buffer)
-            where T : struct => buffer.GetSpan().Length;
+        public static Span<T> GetSpan<T>(this IMemoryOwner<T> buffer)
+            => buffer.Memory.Span;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int Length<T>(this IMemoryOwner<T> buffer)
+            => buffer.GetSpan().Length;
 
         /// <summary>
         /// Gets a <see cref="Span{T}"/> to an offseted position inside the buffer.
@@ -21,8 +26,7 @@ namespace SixLabors.Memory
         /// <param name="start">The start</param>
         /// <returns>The <see cref="Span{T}"/></returns>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static Span<T> Slice<T>(this IBuffer<T> buffer, int start)
-            where T : struct
+        public static Span<T> Slice<T>(this IMemoryOwner<T> buffer, int start)
         {
             return buffer.GetSpan().Slice(start);
         }
@@ -35,8 +39,7 @@ namespace SixLabors.Memory
         /// <param name="length">The length of the slice</param>
         /// <returns>The <see cref="Span{T}"/></returns>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static Span<T> Slice<T>(this IBuffer<T> buffer, int start, int length)
-            where T : struct
+        public static Span<T> Slice<T>(this IMemoryOwner<T> buffer, int start, int length)
         {
             return buffer.GetSpan().Slice(start, length);
         }
@@ -46,13 +49,12 @@ namespace SixLabors.Memory
         /// </summary>
         /// <param name="buffer">The buffer</param>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static void Clear<T>(this IBuffer<T> buffer)
-            where T : struct
+        public static void Clear<T>(this IMemoryOwner<T> buffer)
         {
             buffer.GetSpan().Clear();
         }
 
-        public static ref T GetReference<T>(this IBuffer<T> buffer)
+        public static ref T GetReference<T>(this IMemoryOwner<T> buffer)
             where T : struct =>
             ref MemoryMarshal.GetReference(buffer.GetSpan());
 

src/ImageSharp/Memory/BufferManager.cs

@@ -11,6 +11,11 @@ namespace SixLabors.Memory
     /// Implements content transfer logic in  <see cref="SwapOrCopyContent"/> that depends on the ownership status.
     /// This is needed to transfer the contents of a temporary <see cref="Buffer2D{T}"/> to a persistent <see cref="SixLabors.ImageSharp.ImageFrame{T}.PixelBuffer"/>
     /// </summary>
+    /// <remarks>
+    /// For a deeper understanding of the owner/consumer model, check out the following docs: <br/>
+    /// https://gist.github.com/GrabYourPitchforks/4c3e1935fd4d9fa2831dbfcab35dffc6
+    /// https://www.codemag.com/Article/1807051/Introducing-.NET-Core-2.1-Flagship-Types-Span-T-and-Memory-T
+    /// </remarks>
     internal struct BufferManager<T> : IDisposable
     {
         public BufferManager(IMemoryOwner<T> memoryOwner)
@@ -31,6 +36,10 @@ namespace SixLabors.Memory
 
         public bool OwnsMemory => this.MemoryOwner != null;
 
+        public Span<T> GetSpan() => this.Memory.Span;
+
+        public void Clear() => this.Memory.Span.Clear();
+
         /// <summary>
         /// Swaps the contents of 'destination' with 'source' if the buffers are owned (1),
         /// copies the contents of 'source' to 'destination' otherwise (2). Buffers should be of same size in case 2!

src/ImageSharp/Memory/ConsumedBuffer.cs

@@ -1,34 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-
-namespace SixLabors.Memory
-{
-    /// <summary>
-    /// A buffer implementation that consumes an existing <see cref="Memory{T}"/> instance.
-    /// The ownership of the memory remains external.
-    /// </summary>
-    /// <typeparam name="T">The value type</typeparam>
-    internal sealed class ConsumedBuffer<T> : IBuffer<T>
-        where T : struct
-    {
-        public ConsumedBuffer(Memory<T> memory)
-        {
-            this.Memory = memory;
-        }
-
-        public Memory<T> Memory { get; }
-
-        public bool IsMemoryOwner => false;
-
-        public Span<T> GetSpan()
-        {
-            return this.Memory.Span;
-        }
-
-        public void Dispose()
-        {
-        }
-    }
-}

src/ImageSharp/Memory/IBuffer{T}.cs

@@ -1,38 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-using System.Buffers;
-
-namespace SixLabors.Memory
-{
-    /// <summary>
-    /// Represents a contigous memory buffer of value-type items.
-    /// Depending on it's implementation, an <see cref="IBuffer{T}"/> can (1) OWN or (2) CONSUME the <see cref="Memory{T}"/> instance it wraps.
-    /// For a deeper understanding of the owner/consumer model, read the following docs: <br/>
-    /// https://gist.github.com/GrabYourPitchforks/4c3e1935fd4d9fa2831dbfcab35dffc6
-    /// TODO: We need more SOC here! For owned buffers we should use <see cref="IMemoryOwner{T}"/>.
-    /// For the consumption case we should not use buffers at all. We need to refactor Buffer2D{T} for this.
-    /// </summary>
-    /// <typeparam name="T">The value type</typeparam>
-    internal interface IBuffer<T> : IDisposable
-        where T : struct
-    {
-        /// <summary>
-        /// Gets a value indicating whether this instance is owning the <see cref="Memory"/>.
-        /// </summary>
-        bool IsMemoryOwner { get; }
-
-        /// <summary>
-        /// Gets the <see cref="Memory{T}"/> ownerd/consumed by this buffer.
-        /// </summary>
-        Memory<T> Memory { get; }
-
-        /// <summary>
-        /// Gets the span to the memory "promised" by this buffer when it's OWNED (1).
-        /// Gets `this.Memory.Span` when the buffer CONSUMED (2).
-        /// </summary>
-        /// <returns>The <see cref="Span{T}"/></returns>
-        Span<T> GetSpan();
-    }
-}

src/ImageSharp/Memory/IManagedByteBuffer.cs

@@ -1,12 +1,14 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System.Buffers;
+
 namespace SixLabors.Memory
 {
     /// <summary>
     /// Represents a byte buffer backed by a managed array. Useful for interop with classic .NET API-s.
     /// </summary>
-    internal interface IManagedByteBuffer : IBuffer<byte>
+    internal interface IManagedByteBuffer : IMemoryOwner<byte>
     {
         /// <summary>
         /// Gets the managed array backing this buffer instance.

src/ImageSharp/Memory/ManagedBufferBase.cs

@@ -7,9 +7,9 @@ using System.Runtime.InteropServices;
 namespace SixLabors.Memory
 {
     /// <summary>
-    /// Provides a base class for <see cref="IBuffer{T}"/> implementations by implementing pinning logic for <see cref="MemoryManager{T}"/> adaption.
+    /// Provides a base class for <see cref="IMemoryOwner{T}"/> implementations by implementing pinning logic for <see cref="MemoryManager{T}"/> adaption.
     /// </summary>
-    internal abstract class ManagedBufferBase<T> : MemoryManager<T>, IBuffer<T>
+    internal abstract class ManagedBufferBase<T> : MemoryManager<T>
         where T : struct
     {
         private GCHandle pinHandle;

src/ImageSharp/Memory/MemoryAllocator.cs

@@ -1,6 +1,8 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System.Buffers;
+
 namespace SixLabors.Memory
 {
     /// <summary>
@@ -9,13 +11,13 @@ namespace SixLabors.Memory
     public abstract class MemoryAllocator
     {
         /// <summary>
-        /// Allocates an <see cref="IBuffer{T}"/> of size <paramref name="length"/>.
+        /// Allocates an <see cref="IMemoryOwner{T}" />, holding a <see cref="System.Memory{T}"/> of length <paramref name="length"/>.
         /// </summary>
         /// <typeparam name="T">Type of the data stored in the buffer</typeparam>
         /// <param name="length">Size of the buffer to allocate</param>
         /// <param name="options">The allocation options.</param>
         /// <returns>A buffer of values of type <typeparamref name="T"/>.</returns>
-        internal abstract IBuffer<T> Allocate<T>(int length, AllocationOptions options = AllocationOptions.None)
+        internal abstract IMemoryOwner<T> Allocate<T>(int length, AllocationOptions options = AllocationOptions.None)
             where T : struct;
 
         /// <summary>

src/ImageSharp/Memory/MemoryAllocatorExtensions.cs

@@ -1,4 +1,6 @@
-using SixLabors.Primitives;
+using System.Buffers;
+
+using SixLabors.Primitives;
 
 namespace SixLabors.Memory
 {
@@ -14,7 +16,7 @@ namespace SixLabors.Memory
             AllocationOptions options = AllocationOptions.None)
             where T : struct
         {
-            IBuffer<T> buffer = memoryAllocator.Allocate<T>(width * height, options);
+            IMemoryOwner<T> buffer = memoryAllocator.Allocate<T>(width * height, options);
 
             return new Buffer2D<T>(buffer, width, height);
         }

src/ImageSharp/Memory/SimpleGcMemoryAllocator.cs

@@ -1,4 +1,6 @@
-namespace SixLabors.Memory
+using System.Buffers;
+
+namespace SixLabors.Memory
 {
     /// <summary>
     /// Implements <see cref="MemoryAllocator"/> by newing up arrays by the GC on every allocation requests.
@@ -6,7 +8,7 @@
     public sealed class SimpleGcMemoryAllocator : MemoryAllocator
     {
         /// <inheritdoc />
-        internal override IBuffer<T> Allocate<T>(int length, AllocationOptions options)
+        internal override IMemoryOwner<T> Allocate<T>(int length, AllocationOptions options = AllocationOptions.None)
         {
             return new BasicArrayBuffer<T>(new T[length]);
         }

src/ImageSharp/PixelFormats/PixelBlenders/DefaultPixelBlenders.Generated.cs

@@ -2,13 +2,13 @@
 // Licensed under the Apache License, Version 2.0.
 
 // <auto-generated />
+using System;
+using System.Numerics;
+using System.Buffers;
+using SixLabors.Memory;
+
 namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
 {
-    using System;
-    using System.Numerics;
-    using SixLabors.Memory;
-
-
     /// <summary>
     /// Collection of Porter Duff alpha blending functions applying different composition models.
     /// </summary>
@@ -44,7 +44,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -83,7 +83,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -122,7 +122,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -161,7 +161,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -200,7 +200,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -239,7 +239,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -278,7 +278,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -317,7 +317,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -356,7 +356,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -395,7 +395,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -434,7 +434,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -473,7 +473,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -512,7 +512,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -551,7 +551,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -590,7 +590,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -629,7 +629,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -668,7 +668,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -707,7 +707,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -746,7 +746,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -785,7 +785,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -824,7 +824,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);

src/ImageSharp/PixelFormats/PixelBlenders/DefaultPixelBlenders.Generated.tt

@@ -12,13 +12,13 @@
 // Licensed under the Apache License, Version 2.0.
 
 // <auto-generated />
+using System;
+using System.Numerics;
+using System.Buffers;
+using SixLabors.Memory;
+
 namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
 {
-    using System;
-    using System.Numerics;
-    using SixLabors.Memory;
-
-
     /// <summary>
     /// Collection of Porter Duff alpha blending functions applying different composition models.
     /// </summary>
@@ -86,7 +86,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                     Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
                     Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-                    using (IBuffer<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
+                    using (IMemoryOwner<Vector4> buffer = memoryManager.Allocate<Vector4>(destination.Length * 3))
                     {
                         Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                         Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);

src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationProcessor.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Numerics;
 using System.Runtime.CompilerServices;
 using SixLabors.ImageSharp.Advanced;
@@ -43,8 +44,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Normalization
             Span<TPixel> pixels = source.GetPixelSpan();
 
             // Build the histogram of the grayscale levels.
-            using (IBuffer<int> histogramBuffer = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
-            using (IBuffer<int> cdfBuffer = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
+            using (IMemoryOwner<int> histogramBuffer = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
+            using (IMemoryOwner<int> cdfBuffer = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
             {
                 Span<int> histogram = histogramBuffer.GetSpan();
                 for (int i = 0; i < pixels.Length; i++)

src/ImageSharp/Processing/Processors/Overlays/BackgroundColorProcessor.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Threading.Tasks;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.PixelFormats;
@@ -65,8 +66,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Overlays
 
             int width = maxX - minX;
 
-            using (IBuffer<TPixel> colors = source.MemoryAllocator.Allocate<TPixel>(width))
-            using (IBuffer<float> amount = source.MemoryAllocator.Allocate<float>(width))
+            using (IMemoryOwner<TPixel> colors = source.MemoryAllocator.Allocate<TPixel>(width))
+            using (IMemoryOwner<float> amount = source.MemoryAllocator.Allocate<float>(width))
             {
                 // Be careful! Do not capture colorSpan & amountSpan in the lambda below!
                 Span<TPixel> colorSpan = colors.GetSpan();

src/ImageSharp/Processing/Processors/Overlays/GlowProcessor.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Numerics;
 using System.Threading.Tasks;
 using SixLabors.ImageSharp.Advanced;
@@ -111,7 +112,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Overlays
             }
 
             int width = maxX - minX;
-            using (IBuffer<TPixel> rowColors = source.MemoryAllocator.Allocate<TPixel>(width))
+            using (IMemoryOwner<TPixel> rowColors = source.MemoryAllocator.Allocate<TPixel>(width))
             {
                 // Be careful! Do not capture rowColorsSpan in the lambda below!
                 Span<TPixel> rowColorsSpan = rowColors.GetSpan();
@@ -127,7 +128,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Overlays
                     configuration.ParallelOptions,
                     y =>
                     {
-                        using (IBuffer<float> amounts = source.MemoryAllocator.Allocate<float>(width))
+                        using (IMemoryOwner<float> amounts = source.MemoryAllocator.Allocate<float>(width))
                         {
                             Span<float> amountsSpan = amounts.GetSpan();
                             int offsetY = y - startY;

src/ImageSharp/Processing/Processors/Overlays/VignetteProcessor.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Numerics;
 using System.Threading.Tasks;
 using SixLabors.ImageSharp.Advanced;
@@ -113,7 +114,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Overlays
             }
 
             int width = maxX - minX;
-            using (IBuffer<TPixel> rowColors = source.MemoryAllocator.Allocate<TPixel>(width))
+            using (IMemoryOwner<TPixel> rowColors = source.MemoryAllocator.Allocate<TPixel>(width))
             {
                 // Be careful! Do not capture rowColorsSpan in the lambda below!
                 Span<TPixel> rowColorsSpan = rowColors.GetSpan();
@@ -129,7 +130,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Overlays
                     configuration.ParallelOptions,
                     y =>
                         {
-                            using (IBuffer<float> amounts = source.MemoryAllocator.Allocate<float>(width))
+                            using (IMemoryOwner<float> amounts = source.MemoryAllocator.Allocate<float>(width))
                             {
                                 Span<float> amountsSpan = amounts.GetSpan();
                                 int offsetY = y - startY;

src/ImageSharp/Processing/Processors/Quantization/QuantizedFrame{TPixel}.cs

@@ -2,6 +2,8 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
+
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Memory;
 
@@ -15,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
     public class QuantizedFrame<TPixel> : IDisposable
         where TPixel : struct, IPixel<TPixel>
     {
-        private IBuffer<byte> pixels;
+        private IMemoryOwner<byte> pixels;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="QuantizedFrame{TPixel}"/> class.

src/ImageSharp/Processing/Processors/Quantization/WuFrameQuantizer{TPixel}.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Collections.Generic;
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -70,37 +71,37 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// <summary>
         /// Moment of <c>P(c)</c>.
         /// </summary>
-        private IBuffer<long> vwt;
+        private IMemoryOwner<long> vwt;
 
         /// <summary>
         /// Moment of <c>r*P(c)</c>.
         /// </summary>
-        private IBuffer<long> vmr;
+        private IMemoryOwner<long> vmr;
 
         /// <summary>
         /// Moment of <c>g*P(c)</c>.
         /// </summary>
-        private IBuffer<long> vmg;
+        private IMemoryOwner<long> vmg;
 
         /// <summary>
         /// Moment of <c>b*P(c)</c>.
         /// </summary>
-        private IBuffer<long> vmb;
+        private IMemoryOwner<long> vmb;
 
         /// <summary>
         /// Moment of <c>a*P(c)</c>.
         /// </summary>
-        private IBuffer<long> vma;
+        private IMemoryOwner<long> vma;
 
         /// <summary>
         /// Moment of <c>c^2*P(c)</c>.
         /// </summary>
-        private IBuffer<float> m2;
+        private IMemoryOwner<float> m2;
 
         /// <summary>
         /// Color space tag.
         /// </summary>
-        private IBuffer<byte> tag;
+        private IMemoryOwner<byte> tag;
 
         /// <summary>
         /// Maximum allowed color depth
@@ -467,18 +468,18 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             Span<long> vmaSpan = this.vma.GetSpan();
             Span<float> m2Span = this.m2.GetSpan();
 
-            using (IBuffer<long> volume = memoryAllocator.Allocate<long>(IndexCount * IndexAlphaCount))
-            using (IBuffer<long> volumeR = memoryAllocator.Allocate<long>(IndexCount * IndexAlphaCount))
-            using (IBuffer<long> volumeG = memoryAllocator.Allocate<long>(IndexCount * IndexAlphaCount))
-            using (IBuffer<long> volumeB = memoryAllocator.Allocate<long>(IndexCount * IndexAlphaCount))
-            using (IBuffer<long> volumeA = memoryAllocator.Allocate<long>(IndexCount * IndexAlphaCount))
-            using (IBuffer<float> volume2 = memoryAllocator.Allocate<float>(IndexCount * IndexAlphaCount))
-            using (IBuffer<long> area = memoryAllocator.Allocate<long>(IndexAlphaCount))
-            using (IBuffer<long> areaR = memoryAllocator.Allocate<long>(IndexAlphaCount))
-            using (IBuffer<long> areaG = memoryAllocator.Allocate<long>(IndexAlphaCount))
-            using (IBuffer<long> areaB = memoryAllocator.Allocate<long>(IndexAlphaCount))
-            using (IBuffer<long> areaA = memoryAllocator.Allocate<long>(IndexAlphaCount))
-            using (IBuffer<float> area2 = memoryAllocator.Allocate<float>(IndexAlphaCount))
+            using (IMemoryOwner<long> volume = memoryAllocator.Allocate<long>(IndexCount * IndexAlphaCount))
+            using (IMemoryOwner<long> volumeR = memoryAllocator.Allocate<long>(IndexCount * IndexAlphaCount))
+            using (IMemoryOwner<long> volumeG = memoryAllocator.Allocate<long>(IndexCount * IndexAlphaCount))
+            using (IMemoryOwner<long> volumeB = memoryAllocator.Allocate<long>(IndexCount * IndexAlphaCount))
+            using (IMemoryOwner<long> volumeA = memoryAllocator.Allocate<long>(IndexCount * IndexAlphaCount))
+            using (IMemoryOwner<float> volume2 = memoryAllocator.Allocate<float>(IndexCount * IndexAlphaCount))
+            using (IMemoryOwner<long> area = memoryAllocator.Allocate<long>(IndexAlphaCount))
+            using (IMemoryOwner<long> areaR = memoryAllocator.Allocate<long>(IndexAlphaCount))
+            using (IMemoryOwner<long> areaG = memoryAllocator.Allocate<long>(IndexAlphaCount))
+            using (IMemoryOwner<long> areaB = memoryAllocator.Allocate<long>(IndexAlphaCount))
+            using (IMemoryOwner<long> areaA = memoryAllocator.Allocate<long>(IndexAlphaCount))
+            using (IMemoryOwner<float> area2 = memoryAllocator.Allocate<float>(IndexAlphaCount))
             {
                 Span<long> volumeSpan = volume.GetSpan();
                 Span<long> volumeRSpan = volumeR.GetSpan();
@@ -791,7 +792,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             this.colorCube = new Box[this.colors];
             float[] vv = new float[this.colors];
 
-            ref var cube = ref this.colorCube[0];
+            ref Box cube = ref this.colorCube[0];
             cube.R0 = cube.G0 = cube.B0 = cube.A0 = 0;
             cube.R1 = cube.G1 = cube.B1 = IndexCount - 1;
             cube.A1 = IndexAlphaCount - 1;
@@ -800,8 +801,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
 
             for (int i = 1; i < this.colors; i++)
             {
-                ref var nextCube = ref this.colorCube[next];
-                ref var currentCube = ref this.colorCube[i];
+                ref Box nextCube = ref this.colorCube[next];
+                ref Box currentCube = ref this.colorCube[i];
                 if (this.Cut(ref nextCube, ref currentCube))
                 {
                     vv[next] = nextCube.Volume > 1 ? this.Variance(ref nextCube) : 0F;

src/ImageSharp/Processing/Processors/Transforms/ResizeProcessor.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Collections.Generic;
 using System.Linq;
 using System.Numerics;
@@ -303,7 +304,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                     sourceRectangle.Bottom,
                     configuration,
                     source.Width,
-                    (int y, IBuffer<Vector4> tempRowBuffer) =>
+                    (int y, IMemoryOwner<Vector4> tempRowBuffer) =>
                         {
                             ref Vector4 firstPassRow = ref MemoryMarshal.GetReference(firstPassPixels.GetRowSpan(y));
                             Span<TPixel> sourceRow = source.GetPixelRowSpan(y);

src/ImageSharp/Processing/Processors/Transforms/WeightsWindow.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Numerics;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
@@ -32,7 +33,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         /// <summary>
         /// The buffer containing the weights values.
         /// </summary>
-        private readonly IBuffer<float> buffer;
+        private readonly BufferManager<float> buffer;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="WeightsWindow"/> struct.
@@ -66,7 +67,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         /// </summary>
         /// <returns>The <see cref="Span{T}"/></returns>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public Span<float> GetWindowSpan() => this.buffer.Slice(this.flatStartIndex, this.Length);
+        public Span<float> GetWindowSpan() => this.buffer.GetSpan().Slice(this.flatStartIndex, this.Length);
 
         /// <summary>
         /// Computes the sum of vectors in 'rowSpan' weighted by weight values, pointed by this <see cref="WeightsWindow"/> instance.

tests/ImageSharp.Benchmarks/Color/Bulk/PackFromVector4.cs

@@ -1,21 +1,24 @@
 // ReSharper disable InconsistentNaming
-namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces.Bulk
-{
-    using System.Numerics;
-    using System.Runtime.CompilerServices;
-    using System.Runtime.InteropServices;
-    using BenchmarkDotNet.Attributes;
 
-    using SixLabors.Memory;
-    using SixLabors.ImageSharp.PixelFormats;
+using System.Buffers;
+using System.Numerics;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+using BenchmarkDotNet.Attributes;
 
+using SixLabors.Memory;
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces.Bulk
+{
     [Config(typeof(Config.ShortClr))]
     public abstract class PackFromVector4<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
-        private IBuffer<Vector4> source;
+        private IMemoryOwner<Vector4> source;
 
-        private IBuffer<TPixel> destination;
+        private IMemoryOwner<TPixel> destination;
 
         [Params(16, 128, 512)]
         public int Count { get; set; }

tests/ImageSharp.Benchmarks/Color/Bulk/PackFromXyzw.cs

@@ -1,19 +1,21 @@
 // ReSharper disable InconsistentNaming
-namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces.Bulk
-{
-    using System;
 
-    using BenchmarkDotNet.Attributes;
+using System.Buffers;
+using System;
+
+using BenchmarkDotNet.Attributes;
 
-    using SixLabors.Memory;
-    using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Memory;
+using SixLabors.ImageSharp.PixelFormats;
 
+namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces.Bulk
+{
     public abstract class PackFromXyzw<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
-        private IBuffer<TPixel> destination;
+        private IMemoryOwner<TPixel> destination;
 
-        private IBuffer<byte> source;
+        private IMemoryOwner<byte> source;
 
         [Params(16, 128, 1024)]
         public int Count { get; set; }

tests/ImageSharp.Benchmarks/Color/Bulk/ToVector4.cs

@@ -1,20 +1,22 @@
 // ReSharper disable InconsistentNaming
-namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces.Bulk
-{
-    using System;
-    using System.Numerics;
 
-    using BenchmarkDotNet.Attributes;
+using System.Buffers;
+using System;
+using System.Numerics;
+
+using BenchmarkDotNet.Attributes;
 
-    using SixLabors.Memory;
-    using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Memory;
+using SixLabors.ImageSharp.PixelFormats;
 
+namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces.Bulk
+{
     public abstract class ToVector4<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
-        private IBuffer<TPixel> source;
+        private IMemoryOwner<TPixel> source;
 
-        private IBuffer<Vector4> destination;
+        private IMemoryOwner<Vector4> destination;
 
         [Params(64, 300, 1024)]
         public int Count { get; set; }

tests/ImageSharp.Benchmarks/Color/Bulk/ToXyz.cs

@@ -1,20 +1,21 @@
 // ReSharper disable InconsistentNaming
-namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces.Bulk
-{
-    using System;
-    using System.Numerics;
 
-    using BenchmarkDotNet.Attributes;
+using System.Buffers;
+using System;
+
+using BenchmarkDotNet.Attributes;
 
-    using SixLabors.Memory;
-    using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Memory;
+using SixLabors.ImageSharp.PixelFormats;
 
+namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces.Bulk
+{
     public abstract class ToXyz<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
-        private IBuffer<TPixel> source;
+        private IMemoryOwner<TPixel> source;
 
-        private IBuffer<byte> destination;
+        private IMemoryOwner<byte> destination;
 
         [Params(16, 128, 1024)]
         public int Count { get; set; }

tests/ImageSharp.Benchmarks/Color/Bulk/ToXyzw.cs

@@ -1,22 +1,20 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
+using System.Buffers;
+using BenchmarkDotNet.Attributes;
+
+using SixLabors.Memory;
+using SixLabors.ImageSharp.PixelFormats;
+
 // ReSharper disable InconsistentNaming
 
 namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces.Bulk
 {
-    using BenchmarkDotNet.Attributes;
-
-    using SixLabors.Memory;
-    using SixLabors.ImageSharp.PixelFormats;
-
     public abstract class ToXyzw<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
-        private IBuffer<TPixel> source;
+        private IMemoryOwner<TPixel> source;
 
-        private IBuffer<byte> destination;
+        private IMemoryOwner<byte> destination;
 
         [Params(16, 128, 1024)]
         public int Count { get; set; }

tests/ImageSharp.Benchmarks/PixelBlenders/PorterDuffBulkVsPixel.cs

@@ -3,6 +3,8 @@
 // Licensed under the Apache License, Version 2.0.
 // </copyright>
 
+using System.Buffers;
+
 namespace SixLabors.ImageSharp.Benchmarks
 {
     using System;
@@ -24,7 +26,7 @@ namespace SixLabors.ImageSharp.Benchmarks
             Guard.MustBeGreaterThanOrEqualTo(source.Length, destination.Length, nameof(source.Length));
             Guard.MustBeGreaterThanOrEqualTo(amount.Length, destination.Length, nameof(amount.Length));
 
-            using (IBuffer<Vector4> buffer = Configuration.Default.MemoryAllocator.Allocate<Vector4>(destination.Length * 3))
+            using (IMemoryOwner<Vector4> buffer = Configuration.Default.MemoryAllocator.Allocate<Vector4>(destination.Length * 3))
             {
                 Span<Vector4> destinationSpan = buffer.Slice(0, destination.Length);
                 Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
@@ -59,7 +61,7 @@ namespace SixLabors.ImageSharp.Benchmarks
         {
             using (var image = new Image<Rgba32>(800, 800))
             {
-                using (IBuffer<float> amounts = Configuration.Default.MemoryAllocator.Allocate<float>(image.Width))
+                using (IMemoryOwner<float> amounts = Configuration.Default.MemoryAllocator.Allocate<float>(image.Width))
                 {
                     amounts.GetSpan().Fill(1);
 
@@ -80,7 +82,7 @@ namespace SixLabors.ImageSharp.Benchmarks
         {
             using (var image = new Image<Rgba32>(800, 800))
             {
-                using (IBuffer<float> amounts = Configuration.Default.MemoryAllocator.Allocate<float>(image.Width))
+                using (IMemoryOwner<float> amounts = Configuration.Default.MemoryAllocator.Allocate<float>(image.Width))
                 {
                     amounts.GetSpan().Fill(1);
                     Buffer2D<Rgba32> pixels = image.GetRootFramePixelBuffer();

tests/ImageSharp.Benchmarks/Samplers/Glow.cs

@@ -3,6 +3,8 @@
 // Licensed under the Apache License, Version 2.0.
 // </copyright>
 
+using System.Buffers;
+
 namespace SixLabors.ImageSharp.Benchmarks
 {
 
@@ -102,7 +104,7 @@ namespace SixLabors.ImageSharp.Benchmarks
                 }
 
                 int width = maxX - minX;
-                using (IBuffer<TPixel> rowColors = Configuration.Default.MemoryAllocator.Allocate<TPixel>(width))
+                using (IMemoryOwner<TPixel> rowColors = Configuration.Default.MemoryAllocator.Allocate<TPixel>(width))
                 {
                     Buffer2D<TPixel> sourcePixels = source.PixelBuffer;
                     rowColors.GetSpan().Fill(glowColor);

tests/ImageSharp.Tests/Image/ImageTests.WrapMemory.cs

@@ -12,13 +12,6 @@ namespace SixLabors.ImageSharp.Tests
     {
         public class WrapMemory
         {
-            [Fact]
-            public void ConsumedBuffer_IsMemoryOwner_ReturnsFalse()
-            {
-                var memory = new Memory<int>(new int[55]);
-                var buffer = new ConsumedBuffer<int>(memory);
-                Assert.False(buffer.IsMemoryOwner);
-            }
         }
     }
 }

tests/ImageSharp.Tests/Memory/ArrayPoolMemoryManagerTests.cs

@@ -3,6 +3,8 @@
 
 // ReSharper disable InconsistentNaming
 
+using System.Buffers;
+
 using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp.Tests.Memory
@@ -30,7 +32,7 @@ namespace SixLabors.ImageSharp.Tests.Memory
         private bool CheckIsRentingPooledBuffer<T>(int length)
             where T : struct
         {
-            IBuffer<T> buffer = this.MemoryAllocator.Allocate<T>(length);
+            IMemoryOwner<T> buffer = this.MemoryAllocator.Allocate<T>(length);
             ref T ptrToPrevPosition0 = ref buffer.GetReference();
             buffer.Dispose();
             
@@ -130,12 +132,12 @@ namespace SixLabors.ImageSharp.Tests.Memory
         [InlineData(AllocationOptions.Clean)]
         public void CleaningRequests_AreControlledByAllocationParameter_Clean(AllocationOptions options)
         {
-            using (IBuffer<int> firstAlloc = this.MemoryAllocator.Allocate<int>(42))
+            using (IMemoryOwner<int> firstAlloc = this.MemoryAllocator.Allocate<int>(42))
             {
                 firstAlloc.GetSpan().Fill(666);
             }
 
-            using (IBuffer<int> secondAlloc = this.MemoryAllocator.Allocate<int>(42, options))
+            using (IMemoryOwner<int> secondAlloc = this.MemoryAllocator.Allocate<int>(42, options))
             {
                 int expected = options == AllocationOptions.Clean ? 0 : 666;
                 Assert.Equal(expected, secondAlloc.GetSpan()[0]);
@@ -147,7 +149,7 @@ namespace SixLabors.ImageSharp.Tests.Memory
         [InlineData(true)]
         public void ReleaseRetainedResources_ReplacesInnerArrayPool(bool keepBufferAlive)
         {
-            IBuffer<int> buffer = this.MemoryAllocator.Allocate<int>(32);
+            IMemoryOwner<int> buffer = this.MemoryAllocator.Allocate<int>(32);
             ref int ptrToPrev0 = ref MemoryMarshal.GetReference(buffer.GetSpan());
 
             if (!keepBufferAlive)
@@ -165,7 +167,7 @@ namespace SixLabors.ImageSharp.Tests.Memory
         [Fact]
         public void ReleaseRetainedResources_DisposingPreviouslyAllocatedBuffer_IsAllowed()
         {
-            IBuffer<int> buffer = this.MemoryAllocator.Allocate<int>(32);
+            IMemoryOwner<int> buffer = this.MemoryAllocator.Allocate<int>(32);
             this.MemoryAllocator.ReleaseRetainedResources();
             buffer.Dispose();
         }
@@ -181,11 +183,11 @@ namespace SixLabors.ImageSharp.Tests.Memory
 
             int arrayLengthThreshold = PoolSelectorThresholdInBytes / sizeof(int);
 
-            IBuffer<int> small = this.MemoryAllocator.Allocate<int>(arrayLengthThreshold - 1);
+            IMemoryOwner<int> small = this.MemoryAllocator.Allocate<int>(arrayLengthThreshold - 1);
             ref int ptr2Small = ref small.GetReference();
             small.Dispose();
 
-            IBuffer<int> large = this.MemoryAllocator.Allocate<int>(arrayLengthThreshold + 1);
+            IMemoryOwner<int> large = this.MemoryAllocator.Allocate<int>(arrayLengthThreshold + 1);
             
             Assert.False(Unsafe.AreSame(ref ptr2Small, ref large.GetReference()));
         }

tests/ImageSharp.Tests/Memory/Buffer2DTests.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
@@ -20,7 +21,7 @@ namespace SixLabors.ImageSharp.Tests.Memory
         // ReSharper disable once ClassNeverInstantiated.Local
         private class Assert : Xunit.Assert
         {
-            public static void SpanPointsTo<T>(Span<T> span, IBuffer<T> buffer, int bufferOffset = 0)
+            public static void SpanPointsTo<T>(Span<T> span, IMemoryOwner<T> buffer, int bufferOffset = 0)
                 where T : struct
             {
                 ref T actual = ref MemoryMarshal.GetReference(span);
@@ -41,7 +42,7 @@ namespace SixLabors.ImageSharp.Tests.Memory
             {
                 Assert.Equal(width, buffer.Width);
                 Assert.Equal(height, buffer.Height);
-                Assert.Equal(width * height, buffer.Buffer.Length());
+                Assert.Equal(width * height, buffer.Memory.Length);
             }
         }
 
@@ -70,7 +71,7 @@ namespace SixLabors.ImageSharp.Tests.Memory
 
                 // Assert.Equal(width * y, span.Start);
                 Assert.Equal(width, span.Length);
-                Assert.SpanPointsTo(span, buffer.Buffer, width * y);
+                Assert.SpanPointsTo(span, buffer.Buffer.MemoryOwner, width * y);
             }
         }
 
@@ -86,7 +87,7 @@ namespace SixLabors.ImageSharp.Tests.Memory
 
                 // Assert.Equal(width * y + x, span.Start);
                 Assert.Equal(width - x, span.Length);
-                Assert.SpanPointsTo(span, buffer.Buffer, width * y + x);
+                Assert.SpanPointsTo(span, buffer.Buffer.MemoryOwner, width * y + x);
             }
         }
 
@@ -107,92 +108,24 @@ namespace SixLabors.ImageSharp.Tests.Memory
                 Assert.True(Unsafe.AreSame(ref expected, ref actual));
             }
         }
-        
-        public class SwapOrCopyContent
-        {
-            private MemoryAllocator MemoryAllocator { get; } = new TestMemoryAllocator();
-            
-            [Fact]
-            public void WhenBothBuffersAreMemoryOwners_ShouldSwap()
-            {
-                using (Buffer2D<int> a = this.MemoryAllocator.Allocate2D<int>(10, 5))
-                using (Buffer2D<int> b = this.MemoryAllocator.Allocate2D<int>(3, 7))
-                {
-                    IBuffer<int> aa = a.Buffer;
-                    IBuffer<int> bb = b.Buffer;
 
-                    Buffer2D<int>.SwapOrCopyContent(a, b);
-
-                    Assert.Equal(bb, a.Buffer);
-                    Assert.Equal(aa, b.Buffer);
-                      
-                    Assert.Equal(new Size(3, 7), a.Size());
-                    Assert.Equal(new Size(10, 5), b.Size());
-                }
-            }
-
-            [Fact]
-            public void WhenDestIsNotMemoryOwner_SameSize_ShouldCopy()
+        [Fact]
+        public void SwapOrCopyContent()
+        {
+            using (Buffer2D<int> a = this.MemoryAllocator.Allocate2D<int>(10, 5))
+            using (Buffer2D<int> b = this.MemoryAllocator.Allocate2D<int>(3, 7))
             {
-                var data = new Rgba32[3 * 7];
-                var color = new Rgba32(1, 2, 3, 4);
-                
-                var mmg = new TestMemoryManager<Rgba32>(data);
-                var aBuff = new ConsumedBuffer<Rgba32>(mmg.Memory);
-
-                using (Buffer2D<Rgba32> a = new Buffer2D<Rgba32>(aBuff, 3, 7))
-                {
-                    IBuffer<Rgba32> aa = a.Buffer;
+                IMemoryOwner<int> aa = a.Buffer.MemoryOwner;
+                IMemoryOwner<int> bb = b.Buffer.MemoryOwner;
 
-                    // Precondition:
-                    Assert.Equal(aBuff, aa);
+                Buffer2D<int>.SwapOrCopyContent(a, b);
 
-                    using (Buffer2D<Rgba32> b = this.MemoryAllocator.Allocate2D<Rgba32>(3, 7))
-                    {
-                        IBuffer<Rgba32> bb = b.Buffer;
-                        bb.GetSpan()[10] = color;
+                Assert.Equal(bb, a.Buffer.MemoryOwner);
+                Assert.Equal(aa, b.Buffer.MemoryOwner);
 
-                        // Act:
-                        Buffer2D<Rgba32>.SwapOrCopyContent(a, b);
-
-                        // Assert:
-                        Assert.Equal(aBuff, a.Buffer);
-                        Assert.Equal(bb, b.Buffer);
-                    }
-
-                    // Assert:
-                    Assert.Equal(color, a.Buffer.GetSpan()[10]);
-                }
+                Assert.Equal(new Size(3, 7), a.Size());
+                Assert.Equal(new Size(10, 5), b.Size());
             }
-
-            [Fact]
-            public void WhenDestIsNotMemoryOwner_DifferentSize_Throws()
-            {
-                var data = new Rgba32[3 * 7];
-                var color = new Rgba32(1, 2, 3, 4);
-                data[10] = color;
-
-                var mmg = new TestMemoryManager<Rgba32>(data);
-                var aBuff = new ConsumedBuffer<Rgba32>(mmg.Memory);
-
-                using (Buffer2D<Rgba32> a = new Buffer2D<Rgba32>(aBuff, 3, 7))
-                {
-                    IBuffer<Rgba32> aa = a.Buffer;
-                    using (Buffer2D<Rgba32> b = this.MemoryAllocator.Allocate2D<Rgba32>(3, 8))
-                    {
-                        IBuffer<Rgba32> bb = b.Buffer;
-
-                        Assert.ThrowsAny<InvalidOperationException>(
-                            () =>
-                                {
-                                    Buffer2D<Rgba32>.SwapOrCopyContent(a, b);
-                                });
-                    }
-
-                    Assert.Equal(color, a.Buffer.GetSpan()[10]);
-                }
-            }
-
         }
     }
 }

tests/ImageSharp.Tests/Memory/BufferTestSuite.cs

@@ -63,15 +63,6 @@ namespace SixLabors.ImageSharp.Tests.Memory
 
         public static readonly TheoryData<int> LenthValues = new TheoryData<int> { 0, 1, 7, 1023, 1024 };
 
-        [Fact]
-        public void IsMemoryOwner()
-        {
-            using (IBuffer<float> buffer = this.MemoryAllocator.Allocate<float>(42))
-            {
-                Assert.True(buffer.IsMemoryOwner);
-            }
-        }
-
         [Theory]
         [MemberData(nameof(LenthValues))]
         public void HasCorrectLength_byte(int desiredLength)
@@ -96,7 +87,7 @@ namespace SixLabors.ImageSharp.Tests.Memory
         private void TestHasCorrectLength<T>(int desiredLength)
             where T : struct
         {
-            using (IBuffer<T> buffer = this.MemoryAllocator.Allocate<T>(desiredLength))
+            using (IMemoryOwner<T> buffer = this.MemoryAllocator.Allocate<T>(desiredLength))
             {
                 Assert.Equal(desiredLength, buffer.GetSpan().Length);
             }
@@ -124,12 +115,12 @@ namespace SixLabors.ImageSharp.Tests.Memory
             this.TestCanAllocateCleanBuffer<CustomStruct>(desiredLength);
         }
 
-        private IBuffer<T> Allocate<T>(int desiredLength, AllocationOptions options, bool managedByteBuffer)
+        private IMemoryOwner<T> Allocate<T>(int desiredLength, AllocationOptions options, bool managedByteBuffer)
             where T : struct
         {
             if (managedByteBuffer)
             {
-                if (!(this.MemoryAllocator.AllocateManagedByteBuffer(desiredLength, options) is IBuffer<T> buffer))
+                if (!(this.MemoryAllocator.AllocateManagedByteBuffer(desiredLength, options) is IMemoryOwner<T> buffer))
                 {
                     throw new InvalidOperationException("typeof(T) != typeof(byte)");
                 }
@@ -147,7 +138,7 @@ namespace SixLabors.ImageSharp.Tests.Memory
 
             for (int i = 0; i < 10; i++)
             {
-                using (IBuffer<T> buffer = this.Allocate<T>(desiredLength, AllocationOptions.Clean, testManagedByteBuffer))
+                using (IMemoryOwner<T> buffer = this.Allocate<T>(desiredLength, AllocationOptions.Clean, testManagedByteBuffer))
                 {
                     Assert.True(buffer.GetSpan().SequenceEqual(expected));
                 }
@@ -172,7 +163,7 @@ namespace SixLabors.ImageSharp.Tests.Memory
         private void TestSpanPropertyIsAlwaysTheSame<T>(int desiredLength, bool testManagedByteBuffer = false)
             where T : struct
         {
-            using (IBuffer<T> buffer = this.Allocate<T>(desiredLength, AllocationOptions.None, testManagedByteBuffer))
+            using (IMemoryOwner<T> buffer = this.Allocate<T>(desiredLength, AllocationOptions.None, testManagedByteBuffer))
             {
                 ref T a = ref MemoryMarshal.GetReference(buffer.GetSpan());
                 ref T b = ref MemoryMarshal.GetReference(buffer.GetSpan());
@@ -201,7 +192,7 @@ namespace SixLabors.ImageSharp.Tests.Memory
         private void TestWriteAndReadElements<T>(int desiredLength, Func<int, T> getExpectedValue, bool testManagedByteBuffer = false)
             where T : struct
         {
-            using (IBuffer<T> buffer = this.Allocate<T>(desiredLength, AllocationOptions.None, testManagedByteBuffer))
+            using (IMemoryOwner<T> buffer = this.Allocate<T>(desiredLength, AllocationOptions.None, testManagedByteBuffer))
             {
                 T[] expectedVals = new T[buffer.Length()];
 
@@ -247,7 +238,7 @@ namespace SixLabors.ImageSharp.Tests.Memory
         {
             var dummy = default(T);
 
-            using (IBuffer<T> buffer = this.Allocate<T>(desiredLength, AllocationOptions.None, testManagedByteBuffer))
+            using (IMemoryOwner<T> buffer = this.Allocate<T>(desiredLength, AllocationOptions.None, testManagedByteBuffer))
             {
                 Assert.ThrowsAny<Exception>(
                     () =>
@@ -294,7 +285,7 @@ namespace SixLabors.ImageSharp.Tests.Memory
         [Fact]
         public void GetMemory_ReturnsValidMemory()
         {
-            using (IBuffer<CustomStruct> buffer = this.MemoryAllocator.Allocate<CustomStruct>(42))
+            using (IMemoryOwner<CustomStruct> buffer = this.MemoryAllocator.Allocate<CustomStruct>(42))
             {
                 Span<CustomStruct> span0 = buffer.GetSpan();
                 span0[10].A = 30;
@@ -311,7 +302,7 @@ namespace SixLabors.ImageSharp.Tests.Memory
         [Fact]
         public unsafe void GetMemory_ResultIsPinnable()
         {
-            using (IBuffer<int> buffer = this.MemoryAllocator.Allocate<int>(42))
+            using (IMemoryOwner<int> buffer = this.MemoryAllocator.Allocate<int>(42))
             {
                 Span<int> span0 = buffer.GetSpan();
                 span0[10] = 30;

tests/ImageSharp.Tests/PixelFormats/PixelOperationsTests.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Numerics;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
@@ -57,8 +58,8 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
                 int times = 200000;
                 int count = 1024;
 
-                using (IBuffer<ImageSharp.PixelFormats.Rgba32> source = Configuration.Default.MemoryAllocator.Allocate<ImageSharp.PixelFormats.Rgba32>(count))
-                using (IBuffer<Vector4> dest = Configuration.Default.MemoryAllocator.Allocate<Vector4>(count))
+                using (IMemoryOwner<ImageSharp.PixelFormats.Rgba32> source = Configuration.Default.MemoryAllocator.Allocate<ImageSharp.PixelFormats.Rgba32>(count))
+                using (IMemoryOwner<Vector4> dest = Configuration.Default.MemoryAllocator.Allocate<Vector4>(count))
                 {
                     this.Measure(
                         times,
@@ -537,7 +538,7 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             where TDest : struct
         {
             public TSource[] SourceBuffer { get; }
-            public IBuffer<TDest> ActualDestBuffer { get; }
+            public IMemoryOwner<TDest> ActualDestBuffer { get; }
             public TDest[] ExpectedDestBuffer { get; }
 
             public TestBuffers(TSource[] source, TDest[] expectedDest)
@@ -586,7 +587,7 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
         internal static void TestOperation<TSource, TDest>(
             TSource[] source,
             TDest[] expected,
-            Action<TSource[], IBuffer<TDest>> action)
+            Action<TSource[], IMemoryOwner<TDest>> action)
             where TSource : struct
             where TDest : struct
         {

tests/ImageSharp.Tests/TestUtilities/ReferenceCodecs/SystemDrawingBridge.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Drawing;
 using System.Drawing.Imaging;
 
@@ -43,7 +44,7 @@ namespace SixLabors.ImageSharp.Tests.TestUtilities.ReferenceCodecs
 
             var image = new Image<TPixel>(w, h);
 
-            using (IBuffer<Bgra32> workBuffer = Configuration.Default.MemoryAllocator.Allocate<Bgra32>(w))
+            using (IMemoryOwner<Bgra32> workBuffer = Configuration.Default.MemoryAllocator.Allocate<Bgra32>(w))
             {
                 fixed (Bgra32* destPtr = &workBuffer.GetReference())
                 {
@@ -89,7 +90,7 @@ namespace SixLabors.ImageSharp.Tests.TestUtilities.ReferenceCodecs
 
             var image = new Image<TPixel>(w, h);
 
-            using (IBuffer<Bgr24> workBuffer = Configuration.Default.MemoryAllocator.Allocate<Bgr24>(w))
+            using (IMemoryOwner<Bgr24> workBuffer = Configuration.Default.MemoryAllocator.Allocate<Bgr24>(w))
             {
                 fixed (Bgr24* destPtr = &workBuffer.GetReference())
                 {
@@ -122,7 +123,7 @@ namespace SixLabors.ImageSharp.Tests.TestUtilities.ReferenceCodecs
             long destRowByteCount = data.Stride;
             long sourceRowByteCount = w * sizeof(Bgra32);
 
-            using (IBuffer<Bgra32> workBuffer = image.GetConfiguration().MemoryAllocator.Allocate<Bgra32>(w))
+            using (IMemoryOwner<Bgra32> workBuffer = image.GetConfiguration().MemoryAllocator.Allocate<Bgra32>(w))
             {
                 fixed (Bgra32* sourcePtr = &workBuffer.GetReference())
                 {

tests/ImageSharp.Tests/TestUtilities/TestMemoryAllocator.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Buffers;
 using System.Runtime.InteropServices;
 
 using SixLabors.Memory;
@@ -17,7 +18,7 @@ namespace SixLabors.ImageSharp.Tests.Memory
         /// </summary>
         public byte DirtyValue { get; }
 
-        internal override IBuffer<T> Allocate<T>(int length, AllocationOptions options = AllocationOptions.None)
+        internal override IMemoryOwner<T> Allocate<T>(int length, AllocationOptions options = AllocationOptions.None)
         {
             T[] array = this.AllocateArray<T>(length, options);
 

tests/ImageSharp.Tests/TestUtilities/TestMemoryManager.cs

@@ -3,9 +3,6 @@ using System.Buffers;
 
 namespace SixLabors.ImageSharp.Tests
 {
-    using SixLabors.ImageSharp.Advanced;
-    using SixLabors.ImageSharp.PixelFormats;
-
     class TestMemoryManager<T> : MemoryManager<T>
         where T : struct
     {