Can encode Tiff MipMaps

src/ImageSharp/Formats/AnimatedImageFrameMetadata.cs

@@ -1,32 +0,0 @@
-// Copyright (c) Six Labors.
-// Licensed under the Six Labors Split License.
-
-namespace SixLabors.ImageSharp.Formats;
-
-internal class AnimatedImageFrameMetadata
-{
-    /// <summary>
-    /// Gets or sets the frame color table.
-    /// </summary>
-    public ReadOnlyMemory<Color>? ColorTable { get; set; }
-
-    /// <summary>
-    /// Gets or sets the frame color table mode.
-    /// </summary>
-    public FrameColorTableMode ColorTableMode { get; set; }
-
-    /// <summary>
-    /// Gets or sets the duration of the frame.
-    /// </summary>
-    public TimeSpan Duration { get; set; }
-
-    /// <summary>
-    /// Gets or sets the frame alpha blending mode.
-    /// </summary>
-    public FrameBlendMode BlendMode { get; set; }
-
-    /// <summary>
-    /// Gets or sets the frame disposal mode.
-    /// </summary>
-    public FrameDisposalMode DisposalMode { get; set; }
-}

src/ImageSharp/Formats/AnimatedImageMetadata.cs

@@ -1,33 +0,0 @@
-// Copyright (c) Six Labors.
-// Licensed under the Six Labors Split License.
-
-namespace SixLabors.ImageSharp.Formats;
-
-internal class AnimatedImageMetadata
-{
-    /// <summary>
-    /// Gets or sets the shared color table.
-    /// </summary>
-    public ReadOnlyMemory<Color>? ColorTable { get; set; }
-
-    /// <summary>
-    /// Gets or sets the shared color table mode.
-    /// </summary>
-    public FrameColorTableMode ColorTableMode { get; set; }
-
-    /// <summary>
-    /// Gets or sets the default background color of the canvas when animating.
-    /// This color may be used to fill the unused space on the canvas around the frames,
-    /// as well as the transparent pixels of the first frame.
-    /// The background color is also used when the disposal mode is <see cref="FrameDisposalMode.RestoreToBackground"/>.
-    /// </summary>
-    public Color BackgroundColor { get; set; }
-
-    /// <summary>
-    /// Gets or sets the number of times any animation is repeated.
-    /// <remarks>
-    /// 0 means to repeat indefinitely, count is set as repeat n-1 times. Defaults to 1.
-    /// </remarks>
-    /// </summary>
-    public ushort RepeatCount { get; set; }
-}

src/ImageSharp/Formats/Bmp/BmpMetadata.cs

@@ -154,4 +154,10 @@ public class BmpMetadata : IFormatMetadata<BmpMetadata>
 
     /// <inheritdoc/>
     public BmpMetadata DeepClone() => new(this);
+
+    /// <inheritdoc/>
+    public void AfterImageApply<TPixel>(Image<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+    }
 }

src/ImageSharp/Formats/Cur/CurDecoderCore.cs

@@ -35,10 +35,6 @@ internal sealed class CurDecoderCore : IconDecoderCore
             curMetadata.Compression = compression;
             curMetadata.BmpBitsPerPixel = bitsPerPixel;
             curMetadata.ColorTable = colorTable;
-            curMetadata.EncodingWidth = curFrameMetadata.EncodingWidth;
-            curMetadata.EncodingHeight = curFrameMetadata.EncodingHeight;
-            curMetadata.HotspotX = curFrameMetadata.HotspotX;
-            curMetadata.HotspotY = curFrameMetadata.HotspotY;
         }
     }
 }

src/ImageSharp/Formats/Cur/CurFrameMetadata.cs

@@ -132,6 +132,16 @@ public class CurFrameMetadata : IFormatFrameMetadata<CurFrameMetadata>
             EncodingHeight = this.EncodingHeight
         };
 
+    /// <inheritdoc/>
+    public void AfterFrameApply<TPixel>(ImageFrame<TPixel> source, ImageFrame<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+        float ratioX = destination.Width / (float)source.Width;
+        float ratioY = destination.Height / (float)source.Height;
+        this.EncodingWidth = Scale(this.EncodingWidth, destination.Width, ratioX);
+        this.EncodingHeight = Scale(this.EncodingHeight, destination.Height, ratioY);
+    }
+
     /// <inheritdoc/>
     IDeepCloneable IDeepCloneable.DeepClone() => this.DeepClone();
 
@@ -222,4 +232,14 @@ public class CurFrameMetadata : IFormatFrameMetadata<CurFrameMetadata>
             ColorType = color
         };
     }
+
+    private static byte Scale(byte? value, int destination, float ratio)
+    {
+        if (value is null)
+        {
+            return (byte)Math.Clamp(destination, 0, 255);
+        }
+
+        return Math.Min((byte)MathF.Ceiling(value.Value * ratio), (byte)Math.Clamp(destination, 0, 255));
+    }
 }

src/ImageSharp/Formats/Cur/CurMetadata.cs

@@ -22,10 +22,6 @@ public class CurMetadata : IFormatMetadata<CurMetadata>
     private CurMetadata(CurMetadata other)
     {
         this.Compression = other.Compression;
-        this.HotspotX = other.HotspotX;
-        this.HotspotY = other.HotspotY;
-        this.EncodingWidth = other.EncodingWidth;
-        this.EncodingHeight = other.EncodingHeight;
         this.BmpBitsPerPixel = other.BmpBitsPerPixel;
 
         if (other.ColorTable?.Length > 0)
@@ -39,28 +35,6 @@ public class CurMetadata : IFormatMetadata<CurMetadata>
     /// </summary>
     public IconFrameCompression Compression { get; set; }
 
-    /// <summary>
-    /// Gets or sets the horizontal coordinates of the hotspot in number of pixels from the left. Derived from the root frame.
-    /// </summary>
-    public ushort HotspotX { get; set; }
-
-    /// <summary>
-    /// Gets or sets the vertical coordinates of the hotspot in number of pixels from the top. Derived from the root frame.
-    /// </summary>
-    public ushort HotspotY { get; set; }
-
-    /// <summary>
-    /// Gets or sets the encoding width. <br />
-    /// Can be any number between 0 and 255. Value 0 means a frame height of 256 pixels or greater. Derived from the root frame.
-    /// </summary>
-    public byte EncodingWidth { get; set; }
-
-    /// <summary>
-    /// Gets or sets the encoding height. <br />
-    /// Can be any number between 0 and 255. Value 0 means a frame height of 256 pixels or greater. Derived from the root frame.
-    /// </summary>
-    public byte EncodingHeight { get; set; }
-
     /// <summary>
     /// Gets or sets the number of bits per pixel.<br/>
     /// Used when <see cref="Compression"/> is <see cref="IconFrameCompression.Bmp"/>
@@ -175,6 +149,12 @@ public class CurMetadata : IFormatMetadata<CurMetadata>
             ColorTable = this.ColorTable
         };
 
+    /// <inheritdoc/>
+    public void AfterImageApply<TPixel>(Image<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+    }
+
     /// <inheritdoc/>
     IDeepCloneable IDeepCloneable.DeepClone() => this.DeepClone();
 

src/ImageSharp/Formats/Gif/GifFrameMetadata.cs

@@ -126,40 +126,15 @@ public class GifFrameMetadata : IFormatFrameMetadata<GifFrameMetadata>
         };
     }
 
+    /// <inheritdoc/>
+    public void AfterFrameApply<TPixel>(ImageFrame<TPixel> source, ImageFrame<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+    }
+
     /// <inheritdoc/>
     IDeepCloneable IDeepCloneable.DeepClone() => this.DeepClone();
 
     /// <inheritdoc/>
     public GifFrameMetadata DeepClone() => new(this);
-
-    internal static GifFrameMetadata FromAnimatedMetadata(AnimatedImageFrameMetadata metadata)
-    {
-        // TODO: v4 How do I link the parent metadata to the frame metadata to get the global color table?
-        int index = -1;
-        const float background = 1f;
-        if (metadata.ColorTable.HasValue)
-        {
-            ReadOnlySpan<Color> colorTable = metadata.ColorTable.Value.Span;
-            for (int i = 0; i < colorTable.Length; i++)
-            {
-                Vector4 vector = colorTable[i].ToScaledVector4();
-                if (vector.W < background)
-                {
-                    index = i;
-                }
-            }
-        }
-
-        bool hasTransparency = index >= 0;
-
-        return new()
-        {
-            LocalColorTable = metadata.ColorTable,
-            ColorTableMode = metadata.ColorTableMode,
-            FrameDelay = (int)Math.Round(metadata.Duration.TotalMilliseconds / 10),
-            DisposalMode = metadata.DisposalMode,
-            HasTransparency = hasTransparency,
-            TransparencyIndex = hasTransparency ? unchecked((byte)index) : byte.MinValue,
-        };
-    }
 }

src/ImageSharp/Formats/Gif/GifMetadata.cs

@@ -130,6 +130,12 @@ public class GifMetadata : IFormatMetadata<GifMetadata>
         };
     }
 
+    /// <inheritdoc/>
+    public void AfterImageApply<TPixel>(Image<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+    }
+
     /// <inheritdoc/>
     IDeepCloneable IDeepCloneable.DeepClone() => this.DeepClone();
 

src/ImageSharp/Formats/IFormatFrameMetadata.cs

@@ -1,6 +1,8 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
 
+using SixLabors.ImageSharp.PixelFormats;
+
 namespace SixLabors.ImageSharp.Formats;
 
 /// <summary>
@@ -13,6 +15,15 @@ public interface IFormatFrameMetadata : IDeepCloneable
     /// </summary>
     /// <returns>The <see cref="FormatConnectingFrameMetadata"/>.</returns>
     FormatConnectingFrameMetadata ToFormatConnectingFrameMetadata();
+
+    /// <summary>
+    /// This method is called after a process has been applied to the image frame.
+    /// </summary>
+    /// <typeparam name="TPixel">The type of pixel format.</typeparam>
+    /// <param name="source">The source image frame.</param>
+    /// <param name="destination">The destination image frame.</param>
+    void AfterFrameApply<TPixel>(ImageFrame<TPixel> source, ImageFrame<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>;
 }
 
 /// <summary>

src/ImageSharp/Formats/IFormatMetadata.cs

@@ -21,6 +21,14 @@ public interface IFormatMetadata : IDeepCloneable
     /// </summary>
     /// <returns>The <see cref="FormatConnectingMetadata"/>.</returns>
     FormatConnectingMetadata ToFormatConnectingMetadata();
+
+    /// <summary>
+    /// This method is called after a process has been applied to the image.
+    /// </summary>
+    /// <typeparam name="TPixel">The type of pixel format.</typeparam>
+    /// <param name="destination">The destination image .</param>
+    void AfterImageApply<TPixel>(Image<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>;
 }
 
 /// <summary>

src/ImageSharp/Formats/Ico/IcoDecoderCore.cs

@@ -35,8 +35,6 @@ internal sealed class IcoDecoderCore : IconDecoderCore
             curMetadata.Compression = compression;
             curMetadata.BmpBitsPerPixel = bitsPerPixel;
             curMetadata.ColorTable = colorTable;
-            curMetadata.EncodingWidth = icoFrameMetadata.EncodingWidth;
-            curMetadata.EncodingHeight = icoFrameMetadata.EncodingHeight;
         }
     }
 }

src/ImageSharp/Formats/Ico/IcoFrameMetadata.cs

@@ -125,6 +125,16 @@ public class IcoFrameMetadata : IFormatFrameMetadata<IcoFrameMetadata>
             EncodingHeight = this.EncodingHeight
         };
 
+    /// <inheritdoc/>
+    public void AfterFrameApply<TPixel>(ImageFrame<TPixel> source, ImageFrame<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+        float ratioX = destination.Width / (float)source.Width;
+        float ratioY = destination.Height / (float)source.Height;
+        this.EncodingWidth = Scale(this.EncodingWidth, destination.Width, ratioX);
+        this.EncodingHeight = Scale(this.EncodingHeight, destination.Height, ratioY);
+    }
+
     /// <inheritdoc/>
     IDeepCloneable IDeepCloneable.DeepClone() => this.DeepClone();
 
@@ -217,4 +227,14 @@ public class IcoFrameMetadata : IFormatFrameMetadata<IcoFrameMetadata>
             ColorType = color
         };
     }
+
+    private static byte Scale(byte? value, int destination, float ratio)
+    {
+        if (value is null)
+        {
+            return (byte)Math.Clamp(destination, 0, 255);
+        }
+
+        return Math.Min((byte)MathF.Ceiling(value.Value * ratio), (byte)Math.Clamp(destination, 0, 255));
+    }
 }

src/ImageSharp/Formats/Ico/IcoMetadata.cs

@@ -22,8 +22,6 @@ public class IcoMetadata : IFormatMetadata<IcoMetadata>
     private IcoMetadata(IcoMetadata other)
     {
         this.Compression = other.Compression;
-        this.EncodingWidth = other.EncodingWidth;
-        this.EncodingHeight = other.EncodingHeight;
         this.BmpBitsPerPixel = other.BmpBitsPerPixel;
 
         if (other.ColorTable?.Length > 0)
@@ -37,18 +35,6 @@ public class IcoMetadata : IFormatMetadata<IcoMetadata>
     /// </summary>
     public IconFrameCompression Compression { get; set; }
 
-    /// <summary>
-    /// Gets or sets the encoding width. <br />
-    /// Can be any number between 0 and 255. Value 0 means a frame height of 256 pixels or greater. Derived from the root frame.
-    /// </summary>
-    public byte EncodingWidth { get; set; }
-
-    /// <summary>
-    /// Gets or sets the encoding height. <br />
-    /// Can be any number between 0 and 255. Value 0 means a frame height of 256 pixels or greater. Derived from the root frame.
-    /// </summary>
-    public byte EncodingHeight { get; set; }
-
     /// <summary>
     /// Gets or sets the number of bits per pixel.<br/>
     /// Used when <see cref="Compression"/> is <see cref="IconFrameCompression.Bmp"/>
@@ -163,6 +149,12 @@ public class IcoMetadata : IFormatMetadata<IcoMetadata>
             ColorTable = this.ColorTable
         };
 
+    /// <inheritdoc/>
+    public void AfterImageApply<TPixel>(Image<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+    }
+
     /// <inheritdoc/>
     IDeepCloneable IDeepCloneable.DeepClone() => this.DeepClone();
 

src/ImageSharp/Formats/Jpeg/JpegMetadata.cs

@@ -199,6 +199,12 @@ public class JpegMetadata : IFormatMetadata<JpegMetadata>
             Quality = this.Quality,
         };
 
+    /// <inheritdoc/>
+    public void AfterImageApply<TPixel>(Image<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+    }
+
     /// <inheritdoc/>
     IDeepCloneable IDeepCloneable.DeepClone() => this.DeepClone();
 

src/ImageSharp/Formats/Pbm/PbmMetadata.cs

@@ -129,6 +129,12 @@ public class PbmMetadata : IFormatMetadata<PbmMetadata>
             PixelTypeInfo = this.GetPixelTypeInfo(),
         };
 
+    /// <inheritdoc/>
+    public void AfterImageApply<TPixel>(Image<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+    }
+
     /// <inheritdoc/>
     IDeepCloneable IDeepCloneable.DeepClone() => this.DeepClone();
 

src/ImageSharp/Formats/Png/PngFrameMetadata.cs

@@ -2,6 +2,7 @@
 // Licensed under the Six Labors Split License.
 
 using SixLabors.ImageSharp.Formats.Png.Chunks;
+using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp.Formats.Png;
 
@@ -84,6 +85,12 @@ public class PngFrameMetadata : IFormatFrameMetadata<PngFrameMetadata>
         };
     }
 
+    /// <inheritdoc/>
+    public void AfterFrameApply<TPixel>(ImageFrame<TPixel> source, ImageFrame<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+    }
+
     /// <inheritdoc/>
     IDeepCloneable IDeepCloneable.DeepClone() => this.DeepClone();
 

src/ImageSharp/Formats/Png/PngMetadata.cs

@@ -247,6 +247,12 @@ public class PngMetadata : IFormatMetadata<PngMetadata>
             RepeatCount = (ushort)Numerics.Clamp(this.RepeatCount, 0, ushort.MaxValue),
         };
 
+    /// <inheritdoc/>
+    public void AfterImageApply<TPixel>(Image<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+    }
+
     /// <inheritdoc/>
     IDeepCloneable IDeepCloneable.DeepClone() => this.DeepClone();
 

src/ImageSharp/Formats/Qoi/QoiMetadata.cs

@@ -88,6 +88,12 @@ public class QoiMetadata : IFormatMetadata<QoiMetadata>
             PixelTypeInfo = this.GetPixelTypeInfo()
         };
 
+    /// <inheritdoc/>
+    public void AfterImageApply<TPixel>(Image<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+    }
+
     /// <inheritdoc/>
     IDeepCloneable IDeepCloneable.DeepClone() => this.DeepClone();
 

src/ImageSharp/Formats/Tga/TgaMetadata.cs

@@ -94,6 +94,12 @@ public class TgaMetadata : IFormatMetadata<TgaMetadata>
             PixelTypeInfo = this.GetPixelTypeInfo()
         };
 
+    /// <inheritdoc/>
+    public void AfterImageApply<TPixel>(Image<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+    }
+
     /// <inheritdoc/>
     IDeepCloneable IDeepCloneable.DeepClone() => this.DeepClone();
 

src/ImageSharp/Formats/Tiff/TiffDecoderCore.cs

@@ -211,17 +211,21 @@ internal class TiffDecoderCore : ImageDecoderCore
         IList<ExifProfile> directories = reader.Read();
 
         List<ImageFrameMetadata> framesMetadata = [];
-        foreach (ExifProfile dir in directories)
+        int width = 0;
+        int height = 0;
+
+        for (int i = 0; i < directories.Count; i++)
         {
-            framesMetadata.Add(this.CreateFrameMetadata(dir));
+            (ImageFrameMetadata FrameMetadata, TiffFrameMetadata TiffMetadata) meta
-        }
+                = this.CreateFrameMetadata(directories[i]);
 
-        ExifProfile rootFrameExifProfile = directories[0];
+            framesMetadata.Add(meta.FrameMetadata);
 
-        ImageMetadata metadata = TiffDecoderMetadataCreator.Create(framesMetadata, this.skipMetadata, reader.ByteOrder, reader.IsBigTiff);
+            width = Math.Max(width, meta.TiffMetadata.EncodingWidth);
+            height = Math.Max(height, meta.TiffMetadata.EncodingHeight);
+        }
 
-        int width = GetImageWidth(rootFrameExifProfile);
+        ImageMetadata metadata = TiffDecoderMetadataCreator.Create(framesMetadata, this.skipMetadata, reader.ByteOrder, reader.IsBigTiff);
-        int height = GetImageHeight(rootFrameExifProfile);
 
         return new ImageInfo(new(width, height), metadata, framesMetadata);
     }
@@ -237,11 +241,11 @@ internal class TiffDecoderCore : ImageDecoderCore
     private ImageFrame<TPixel> DecodeFrame<TPixel>(ExifProfile tags, Size? size, CancellationToken cancellationToken)
         where TPixel : unmanaged, IPixel<TPixel>
     {
-        ImageFrameMetadata imageFrameMetaData = this.CreateFrameMetadata(tags);
+        (ImageFrameMetadata FrameMetadata, TiffFrameMetadata TiffFrameMetadata) metadata = this.CreateFrameMetadata(tags);
-        bool isTiled = this.VerifyAndParse(tags, imageFrameMetaData.GetTiffMetadata());
+        bool isTiled = this.VerifyAndParse(tags, metadata.TiffFrameMetadata);
 
-        int width = GetImageWidth(tags);
+        int width = metadata.TiffFrameMetadata.EncodingWidth;
-        int height = GetImageHeight(tags);
+        int height = metadata.TiffFrameMetadata.EncodingHeight;
 
         // If size has a value and the width/height off the tiff is smaller we much capture the delta.
         if (size.HasValue)
@@ -256,7 +260,7 @@ internal class TiffDecoderCore : ImageDecoderCore
             size = new Size(width, height);
         }
 
-        ImageFrame<TPixel> frame = new(this.configuration, size.Value.Width, size.Value.Height, imageFrameMetaData);
+        ImageFrame<TPixel> frame = new(this.configuration, size.Value.Width, size.Value.Height, metadata.FrameMetadata);
 
         if (isTiled)
         {
@@ -270,7 +274,7 @@ internal class TiffDecoderCore : ImageDecoderCore
         return frame;
     }
 
-    private ImageFrameMetadata CreateFrameMetadata(ExifProfile tags)
+    private (ImageFrameMetadata FrameMetadata, TiffFrameMetadata TiffMetadata) CreateFrameMetadata(ExifProfile tags)
     {
         ImageFrameMetadata imageFrameMetaData = new();
         if (!this.skipMetadata)
@@ -278,9 +282,10 @@ internal class TiffDecoderCore : ImageDecoderCore
             imageFrameMetaData.ExifProfile = tags;
         }
 
-        TiffFrameMetadata.Parse(imageFrameMetaData.GetTiffMetadata(), tags);
+        TiffFrameMetadata tiffMetadata = TiffFrameMetadata.Parse(tags);
+        imageFrameMetaData.SetFormatMetadata(TiffFormat.Instance, tiffMetadata);
 
-        return imageFrameMetaData;
+        return (imageFrameMetaData, tiffMetadata);
     }
 
     /// <summary>
@@ -825,38 +830,6 @@ internal class TiffDecoderCore : ImageDecoderCore
         return bytesPerRow * height;
     }
 
-    /// <summary>
-    /// Gets the width of the image frame.
-    /// </summary>
-    /// <param name="exifProfile">The image frame exif profile.</param>
-    /// <returns>The image width.</returns>
-    private static int GetImageWidth(ExifProfile exifProfile)
-    {
-        if (!exifProfile.TryGetValue(ExifTag.ImageWidth, out IExifValue<Number> width))
-        {
-            TiffThrowHelper.ThrowInvalidImageContentException("The TIFF image frame is missing the ImageWidth");
-        }
-
-        DebugGuard.MustBeLessThanOrEqualTo((ulong)width.Value, (ulong)int.MaxValue, nameof(ExifTag.ImageWidth));
-
-        return (int)width.Value;
-    }
-
-    /// <summary>
-    /// Gets the height of the image frame.
-    /// </summary>
-    /// <param name="exifProfile">The image frame exif profile.</param>
-    /// <returns>The image height.</returns>
-    private static int GetImageHeight(ExifProfile exifProfile)
-    {
-        if (!exifProfile.TryGetValue(ExifTag.ImageLength, out IExifValue<Number> height))
-        {
-            TiffThrowHelper.ThrowImageFormatException("The TIFF image frame is missing the ImageLength");
-        }
-
-        return (int)height.Value;
-    }
-
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     private static int RoundUpToMultipleOfEight(int value) => (int)(((uint)value + 7) / 8);
 }

src/ImageSharp/Formats/Tiff/TiffEncoderCore.cs

@@ -189,11 +189,22 @@ internal sealed class TiffEncoderCore
         long ifdOffset)
         where TPixel : unmanaged, IPixel<TPixel>
     {
+        // Get the width and height of the frame.
+        // This can differ from the frame bounds in-memory if the image represents only
+        // a subregion.
+        TiffFrameMetadata frameMetaData = frame.Metadata.GetTiffMetadata();
+        int width = frameMetaData.EncodingWidth > 0 ? frameMetaData.EncodingWidth : frame.Width;
+        int height = frameMetaData.EncodingHeight > 0 ? frameMetaData.EncodingHeight : frame.Height;
+
+        width = Math.Min(width, frame.Width);
+        height = Math.Min(height, frame.Height);
+        Size encodingSize = new(width, height);
+
         using TiffBaseCompressor compressor = TiffCompressorFactory.Create(
             compression,
             writer.BaseStream,
             this.memoryAllocator,
-            frame.Width,
+            width,
             (int)bitsPerPixel,
             this.compressionLevel,
             this.HorizontalPredictor == TiffPredictor.Horizontal ? this.HorizontalPredictor.Value : TiffPredictor.None);
@@ -202,6 +213,7 @@ internal sealed class TiffEncoderCore
         using TiffBaseColorWriter<TPixel> colorWriter = TiffColorWriterFactory.Create(
             this.PhotometricInterpretation,
             frame,
+            encodingSize,
             this.quantizer,
             this.pixelSamplingStrategy,
             this.memoryAllocator,
@@ -209,7 +221,7 @@ internal sealed class TiffEncoderCore
             entriesCollector,
             (int)bitsPerPixel);
 
-        int rowsPerStrip = CalcRowsPerStrip(frame.Height, colorWriter.BytesPerRow, this.CompressionType);
+        int rowsPerStrip = CalcRowsPerStrip(height, colorWriter.BytesPerRow, this.CompressionType);
 
         colorWriter.Write(compressor, rowsPerStrip);
 
@@ -222,7 +234,7 @@ internal sealed class TiffEncoderCore
         // Write the metadata for the frame
         entriesCollector.ProcessMetadata(frame, this.skipMetadata);
 
-        entriesCollector.ProcessFrameInfo(frame, imageMetadata);
+        entriesCollector.ProcessFrameInfo(frame, encodingSize, imageMetadata);
         entriesCollector.ProcessImageFormat(this);
 
         if (writer.Position % 2 != 0)

src/ImageSharp/Formats/Tiff/TiffEncoderEntriesCollector.cs

@@ -24,8 +24,8 @@ internal class TiffEncoderEntriesCollector
     public void ProcessMetadata(ImageFrame frame, bool skipMetadata)
         => new MetadataProcessor(this).Process(frame, skipMetadata);
 
-    public void ProcessFrameInfo(ImageFrame frame, ImageMetadata imageMetadata)
+    public void ProcessFrameInfo(ImageFrame frame, Size encodingSize, ImageMetadata imageMetadata)
-        => new FrameInfoProcessor(this).Process(frame, imageMetadata);
+        => new FrameInfoProcessor(this).Process(frame, encodingSize, imageMetadata);
 
     public void ProcessImageFormat(TiffEncoderCore encoder)
         => new ImageFormatProcessor(this).Process(encoder);
@@ -267,16 +267,16 @@ internal class TiffEncoderEntriesCollector
         {
         }
 
-        public void Process(ImageFrame frame, ImageMetadata imageMetadata)
+        public void Process(ImageFrame frame, Size encodingSize, ImageMetadata imageMetadata)
         {
             this.Collector.AddOrReplace(new ExifLong(ExifTagValue.ImageWidth)
             {
-                Value = (uint)frame.Width
+                Value = (uint)encodingSize.Width
             });
 
             this.Collector.AddOrReplace(new ExifLong(ExifTagValue.ImageLength)
             {
-                Value = (uint)frame.Height
+                Value = (uint)encodingSize.Height
             });
 
             this.ProcessResolution(imageMetadata);

src/ImageSharp/Formats/Tiff/TiffFrameMetadata.cs

@@ -3,6 +3,7 @@
 
 using SixLabors.ImageSharp.Formats.Tiff.Constants;
 using SixLabors.ImageSharp.Metadata.Profiles.Exif;
+using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp.Formats.Tiff;
 
@@ -29,6 +30,8 @@ public class TiffFrameMetadata : IFormatFrameMetadata<TiffFrameMetadata>
         this.PhotometricInterpretation = other.PhotometricInterpretation;
         this.Predictor = other.Predictor;
         this.InkSet = other.InkSet;
+        this.EncodingWidth = other.EncodingWidth;
+        this.EncodingHeight = other.EncodingHeight;
     }
 
     /// <summary>
@@ -61,13 +64,59 @@ public class TiffFrameMetadata : IFormatFrameMetadata<TiffFrameMetadata>
     /// </summary>
     public TiffInkSet? InkSet { get; set; }
 
+    /// <summary>
+    /// Gets or sets the encoding width.
+    /// </summary>
+    public int EncodingWidth { get; set; }
+
+    /// <summary>
+    /// Gets or sets the encoding height.
+    /// </summary>
+    public int EncodingHeight { get; set; }
+
     /// <inheritdoc/>
     public static TiffFrameMetadata FromFormatConnectingFrameMetadata(FormatConnectingFrameMetadata metadata)
-        => new();
+    {
+        TiffFrameMetadata frameMetadata = new();
+        if (metadata.EncodingWidth.HasValue && metadata.EncodingHeight.HasValue)
+        {
+            frameMetadata.EncodingWidth = metadata.EncodingWidth.Value;
+            frameMetadata.EncodingHeight = metadata.EncodingHeight.Value;
+        }
+
+        return frameMetadata;
+    }
 
     /// <inheritdoc/>
     public FormatConnectingFrameMetadata ToFormatConnectingFrameMetadata()
-        => new();
+        => new()
+        {
+            EncodingWidth = this.EncodingWidth,
+            EncodingHeight = this.EncodingHeight
+        };
+
+    /// <inheritdoc/>
+    public void AfterFrameApply<TPixel>(ImageFrame<TPixel> source, ImageFrame<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+        float ratioX = destination.Width / (float)source.Width;
+        float ratioY = destination.Height / (float)source.Height;
+        this.EncodingWidth = Scale(this.EncodingWidth, destination.Width, ratioX);
+        this.EncodingHeight = Scale(this.EncodingHeight, destination.Height, ratioY);
+
+        // Overwrite the EXIF dimensional metadata with the encoding dimensions of the image.
+        destination.Metadata.ExifProfile?.SyncDimensions(this.EncodingWidth, this.EncodingHeight);
+    }
+
+    private static int Scale(int value, int destination, float ratio)
+    {
+        if (value <= 0)
+        {
+            return destination;
+        }
+
+        return Math.Min((int)MathF.Ceiling(value * ratio), destination);
+    }
 
     /// <inheritdoc/>
     IDeepCloneable IDeepCloneable.DeepClone() => this.DeepClone();
@@ -93,43 +142,75 @@ public class TiffFrameMetadata : IFormatFrameMetadata<TiffFrameMetadata>
     /// </summary>
     /// <param name="meta">The tiff frame meta data.</param>
     /// <param name="profile">The Exif profile containing tiff frame directory tags.</param>
-    internal static void Parse(TiffFrameMetadata meta, ExifProfile profile)
+    private static void Parse(TiffFrameMetadata meta, ExifProfile profile)
     {
-        if (profile != null)
+        meta.EncodingWidth = GetImageWidth(profile);
+        meta.EncodingHeight = GetImageHeight(profile);
+
+        if (profile.TryGetValue(ExifTag.BitsPerSample, out IExifValue<ushort[]>? bitsPerSampleValue)
+            && TiffBitsPerSample.TryParse(bitsPerSampleValue.Value, out TiffBitsPerSample bitsPerSample))
+        {
+            meta.BitsPerSample = bitsPerSample;
+        }
+
+        meta.BitsPerPixel = meta.BitsPerSample.BitsPerPixel();
+
+        if (profile.TryGetValue(ExifTag.Compression, out IExifValue<ushort>? compressionValue))
         {
-            if (profile.TryGetValue(ExifTag.BitsPerSample, out IExifValue<ushort[]>? bitsPerSampleValue)
+            meta.Compression = (TiffCompression)compressionValue.Value;
-                && TiffBitsPerSample.TryParse(bitsPerSampleValue.Value, out TiffBitsPerSample bitsPerSample))
-            {
-                meta.BitsPerSample = bitsPerSample;
-            }
-
-            meta.BitsPerPixel = meta.BitsPerSample.BitsPerPixel();
-
-            if (profile.TryGetValue(ExifTag.Compression, out IExifValue<ushort>? compressionValue))
-            {
-                meta.Compression = (TiffCompression)compressionValue.Value;
-            }
-
-            if (profile.TryGetValue(ExifTag.PhotometricInterpretation, out IExifValue<ushort>? photometricInterpretationValue))
-            {
-                meta.PhotometricInterpretation = (TiffPhotometricInterpretation)photometricInterpretationValue.Value;
-            }
-
-            if (profile.TryGetValue(ExifTag.Predictor, out IExifValue<ushort>? predictorValue))
-            {
-                meta.Predictor = (TiffPredictor)predictorValue.Value;
-            }
-
-            if (profile.TryGetValue(ExifTag.InkSet, out IExifValue<ushort>? inkSetValue))
-            {
-                meta.InkSet = (TiffInkSet)inkSetValue.Value;
-            }
-
-            // TODO: Why do we remove this? Encoding should overwrite.
-            profile.RemoveValue(ExifTag.BitsPerSample);
-            profile.RemoveValue(ExifTag.Compression);
-            profile.RemoveValue(ExifTag.PhotometricInterpretation);
-            profile.RemoveValue(ExifTag.Predictor);
         }
+
+        if (profile.TryGetValue(ExifTag.PhotometricInterpretation, out IExifValue<ushort>? photometricInterpretationValue))
+        {
+            meta.PhotometricInterpretation = (TiffPhotometricInterpretation)photometricInterpretationValue.Value;
+        }
+
+        if (profile.TryGetValue(ExifTag.Predictor, out IExifValue<ushort>? predictorValue))
+        {
+            meta.Predictor = (TiffPredictor)predictorValue.Value;
+        }
+
+        if (profile.TryGetValue(ExifTag.InkSet, out IExifValue<ushort>? inkSetValue))
+        {
+            meta.InkSet = (TiffInkSet)inkSetValue.Value;
+        }
+
+        // Remove values, we've explicitly captured them and they could change on encode.
+        profile.RemoveValue(ExifTag.BitsPerSample);
+        profile.RemoveValue(ExifTag.Compression);
+        profile.RemoveValue(ExifTag.PhotometricInterpretation);
+        profile.RemoveValue(ExifTag.Predictor);
+    }
+
+    /// <summary>
+    /// Gets the width of the image frame.
+    /// </summary>
+    /// <param name="exifProfile">The image frame exif profile.</param>
+    /// <returns>The image width.</returns>
+    private static int GetImageWidth(ExifProfile exifProfile)
+    {
+        if (!exifProfile.TryGetValue(ExifTag.ImageWidth, out IExifValue<Number>? width))
+        {
+            TiffThrowHelper.ThrowInvalidImageContentException("The TIFF image frame is missing the ImageWidth");
+        }
+
+        DebugGuard.MustBeLessThanOrEqualTo((ulong)width.Value, (ulong)int.MaxValue, nameof(ExifTag.ImageWidth));
+
+        return (int)width.Value;
+    }
+
+    /// <summary>
+    /// Gets the height of the image frame.
+    /// </summary>
+    /// <param name="exifProfile">The image frame exif profile.</param>
+    /// <returns>The image height.</returns>
+    private static int GetImageHeight(ExifProfile exifProfile)
+    {
+        if (!exifProfile.TryGetValue(ExifTag.ImageLength, out IExifValue<Number>? height))
+        {
+            TiffThrowHelper.ThrowImageFormatException("The TIFF image frame is missing the ImageLength");
+        }
+
+        return (int)height.Value;
     }
 }

src/ImageSharp/Formats/Tiff/TiffMetadata.cs

@@ -180,6 +180,12 @@ public class TiffMetadata : IFormatMetadata<TiffMetadata>
             PixelTypeInfo = this.GetPixelTypeInfo()
         };
 
+    /// <inheritdoc/>
+    public void AfterImageApply<TPixel>(Image<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+    }
+
     /// <inheritdoc/>
     IDeepCloneable IDeepCloneable.DeepClone() => this.DeepClone();
 

src/ImageSharp/Formats/Tiff/Writers/TiffBaseColorWriter{TPixel}.cs

@@ -13,8 +13,15 @@ internal abstract class TiffBaseColorWriter<TPixel> : IDisposable
 {
     private bool isDisposed;
 
-    protected TiffBaseColorWriter(ImageFrame<TPixel> image, MemoryAllocator memoryAllocator, Configuration configuration, TiffEncoderEntriesCollector entriesCollector)
+    protected TiffBaseColorWriter(
+        ImageFrame<TPixel> image,
+        Size encodingSize,
+        MemoryAllocator memoryAllocator,
+        Configuration configuration,
+        TiffEncoderEntriesCollector entriesCollector)
     {
+        this.Width = encodingSize.Width;
+        this.Height = encodingSize.Height;
         this.Image = image;
         this.MemoryAllocator = memoryAllocator;
         this.Configuration = configuration;
@@ -26,10 +33,20 @@ internal abstract class TiffBaseColorWriter<TPixel> : IDisposable
     /// </summary>
     public abstract int BitsPerPixel { get; }
 
+    /// <summary>
+    /// Gets the width of the portion of the image to be encoded.
+    /// </summary>
+    public int Width { get; }
+
+    /// <summary>
+    /// Gets the height of the portion of the image to be encoded.
+    /// </summary>
+    public int Height { get; }
+
     /// <summary>
     /// Gets the bytes per row.
     /// </summary>
-    public int BytesPerRow => (int)(((uint)(this.Image.Width * this.BitsPerPixel) + 7) / 8);
+    public int BytesPerRow => (int)(((uint)(this.Width * this.BitsPerPixel) + 7) / 8);
 
     protected ImageFrame<TPixel> Image { get; }
 
@@ -42,18 +59,18 @@ internal abstract class TiffBaseColorWriter<TPixel> : IDisposable
     public virtual void Write(TiffBaseCompressor compressor, int rowsPerStrip)
     {
         DebugGuard.IsTrue(this.BytesPerRow == compressor.BytesPerRow, "bytes per row of the compressor does not match tiff color writer");
-        int stripsCount = (this.Image.Height + rowsPerStrip - 1) / rowsPerStrip;
+        int stripsCount = (this.Height + rowsPerStrip - 1) / rowsPerStrip;
 
         uint[] stripOffsets = new uint[stripsCount];
         uint[] stripByteCounts = new uint[stripsCount];
 
         int stripIndex = 0;
         compressor.Initialize(rowsPerStrip);
-        for (int y = 0; y < this.Image.Height; y += rowsPerStrip)
+        for (int y = 0; y < this.Height; y += rowsPerStrip)
         {
             long offset = compressor.Output.Position;
 
-            int height = Math.Min(rowsPerStrip, this.Image.Height - y);
+            int height = Math.Min(rowsPerStrip, this.Height - y);
             this.EncodeStrip(y, height, compressor);
 
             long endOffset = compressor.Output.Position;

src/ImageSharp/Formats/Tiff/Writers/TiffBiColorWriter{TPixel}.cs

@@ -21,11 +21,16 @@ internal sealed class TiffBiColorWriter<TPixel> : TiffBaseColorWriter<TPixel>
 
     private IMemoryOwner<byte> bitStrip;
 
-    public TiffBiColorWriter(ImageFrame<TPixel> image, MemoryAllocator memoryAllocator, Configuration configuration, TiffEncoderEntriesCollector entriesCollector)
+    public TiffBiColorWriter(
-        : base(image, memoryAllocator, configuration, entriesCollector)
+        ImageFrame<TPixel> image,
+        Size encodingSize,
+        MemoryAllocator memoryAllocator,
+        Configuration configuration,
+        TiffEncoderEntriesCollector entriesCollector)
+        : base(image, encodingSize, memoryAllocator, configuration, entriesCollector)
     {
         // Convert image to black and white.
-        this.imageBlackWhite = new Image<TPixel>(configuration, new ImageMetadata(), new[] { image.Clone() });
+        this.imageBlackWhite = new Image<TPixel>(configuration, new ImageMetadata(), [image.Clone()]);
         this.imageBlackWhite.Mutate(img => img.BinaryDither(KnownDitherings.FloydSteinberg));
     }
 
@@ -35,9 +40,9 @@ internal sealed class TiffBiColorWriter<TPixel> : TiffBaseColorWriter<TPixel>
     /// <inheritdoc/>
     protected override void EncodeStrip(int y, int height, TiffBaseCompressor compressor)
     {
-        int width = this.Image.Width;
+        int width = this.Width;
 
-        if (compressor.Method == TiffCompression.CcittGroup3Fax || compressor.Method == TiffCompression.Ccitt1D || compressor.Method == TiffCompression.CcittGroup4Fax)
+        if (compressor.Method is TiffCompression.CcittGroup3Fax or TiffCompression.Ccitt1D or TiffCompression.CcittGroup4Fax)
         {
             // Special case for T4BitCompressor.
             int stripPixels = width * height;
@@ -77,9 +82,9 @@ internal sealed class TiffBiColorWriter<TPixel> : TiffBaseColorWriter<TPixel>
                 int bitIndex = 0;
                 int byteIndex = 0;
                 Span<byte> outputRow = rows[(outputRowIdx * this.BytesPerRow)..];
-                Span<TPixel> pixelsBlackWhiteRow = blackWhiteBuffer.DangerousGetRowSpan(row);
+                Span<TPixel> pixelsBlackWhiteRow = blackWhiteBuffer.DangerousGetRowSpan(row)[..width];
                 PixelOperations<TPixel>.Instance.ToL8Bytes(this.Configuration, pixelsBlackWhiteRow, pixelAsGraySpan, width);
-                for (int x = 0; x < this.Image.Width; x++)
+                for (int x = 0; x < this.Width; x++)
                 {
                     int shift = 7 - bitIndex;
                     if (pixelAsGraySpan[x] == 255)

src/ImageSharp/Formats/Tiff/Writers/TiffColorWriterFactory.cs

@@ -13,6 +13,7 @@ internal static class TiffColorWriterFactory
     public static TiffBaseColorWriter<TPixel> Create<TPixel>(
         TiffPhotometricInterpretation? photometricInterpretation,
         ImageFrame<TPixel> image,
+        Size encodingSize,
         IQuantizer quantizer,
         IPixelSamplingStrategy pixelSamplingStrategy,
         MemoryAllocator memoryAllocator,
@@ -20,22 +21,15 @@ internal static class TiffColorWriterFactory
         TiffEncoderEntriesCollector entriesCollector,
         int bitsPerPixel)
         where TPixel : unmanaged, IPixel<TPixel>
-    {
+        => photometricInterpretation switch
-        switch (photometricInterpretation)
         {
-            case TiffPhotometricInterpretation.PaletteColor:
+            TiffPhotometricInterpretation.PaletteColor => new TiffPaletteWriter<TPixel>(image, encodingSize, quantizer, pixelSamplingStrategy, memoryAllocator, configuration, entriesCollector, bitsPerPixel),
-                return new TiffPaletteWriter<TPixel>(image, quantizer, pixelSamplingStrategy, memoryAllocator, configuration, entriesCollector, bitsPerPixel);
+            TiffPhotometricInterpretation.BlackIsZero or TiffPhotometricInterpretation.WhiteIsZero => bitsPerPixel switch
-            case TiffPhotometricInterpretation.BlackIsZero:
+            {
-            case TiffPhotometricInterpretation.WhiteIsZero:
+                1 => new TiffBiColorWriter<TPixel>(image, encodingSize, memoryAllocator, configuration, entriesCollector),
-                return bitsPerPixel switch
+                16 => new TiffGrayL16Writer<TPixel>(image, encodingSize, memoryAllocator, configuration, entriesCollector),
-                {
+                _ => new TiffGrayWriter<TPixel>(image, encodingSize, memoryAllocator, configuration, entriesCollector)
-                    1 => new TiffBiColorWriter<TPixel>(image, memoryAllocator, configuration, entriesCollector),
+            },
-                    16 => new TiffGrayL16Writer<TPixel>(image, memoryAllocator, configuration, entriesCollector),
+            _ => new TiffRgbWriter<TPixel>(image, encodingSize, memoryAllocator, configuration, entriesCollector),
-                    _ => new TiffGrayWriter<TPixel>(image, memoryAllocator, configuration, entriesCollector)
+        };
-                };
-
-            default:
-                return new TiffRgbWriter<TPixel>(image, memoryAllocator, configuration, entriesCollector);
-        }
-    }
 }

src/ImageSharp/Formats/Tiff/Writers/TiffCompositeColorWriter{TPixel}.cs

@@ -12,35 +12,36 @@ namespace SixLabors.ImageSharp.Formats.Tiff.Writers;
 /// <summary>
 /// The base class for composite color types: 8-bit gray, 24-bit RGB (4-bit gray, 16-bit (565/555) RGB, 32-bit RGB, CMYK, YCbCr).
 /// </summary>
+/// <typeparam name="TPixel">The tpe of pixel format.</typeparam>
 internal abstract class TiffCompositeColorWriter<TPixel> : TiffBaseColorWriter<TPixel>
     where TPixel : unmanaged, IPixel<TPixel>
 {
     private IMemoryOwner<byte> rowBuffer;
 
-    protected TiffCompositeColorWriter(ImageFrame<TPixel> image, MemoryAllocator memoryAllocator, Configuration configuration, TiffEncoderEntriesCollector entriesCollector)
+    protected TiffCompositeColorWriter(
-        : base(image, memoryAllocator, configuration, entriesCollector)
+        ImageFrame<TPixel> image,
+        Size encodingSize,
+        MemoryAllocator memoryAllocator,
+        Configuration configuration,
+        TiffEncoderEntriesCollector entriesCollector)
+        : base(image, encodingSize, memoryAllocator, configuration, entriesCollector)
     {
     }
 
     protected override void EncodeStrip(int y, int height, TiffBaseCompressor compressor)
     {
-        if (this.rowBuffer == null)
+        (this.rowBuffer ??= this.MemoryAllocator.Allocate<byte>(this.BytesPerRow * height)).Clear();
-        {
-            this.rowBuffer = this.MemoryAllocator.Allocate<byte>(this.BytesPerRow * height);
-        }
-
-        this.rowBuffer.Clear();
 
         Span<byte> outputRowSpan = this.rowBuffer.GetSpan()[..(this.BytesPerRow * height)];
 
-        int width = this.Image.Width;
+        int width = this.Width;
         using IMemoryOwner<TPixel> stripPixelBuffer = this.MemoryAllocator.Allocate<TPixel>(height * width);
         Span<TPixel> stripPixels = stripPixelBuffer.GetSpan();
         int lastRow = y + height;
         int stripPixelsRowIdx = 0;
         for (int row = y; row < lastRow; row++)
         {
-            Span<TPixel> stripPixelsRow = this.Image.PixelBuffer.DangerousGetRowSpan(row);
+            Span<TPixel> stripPixelsRow = this.Image.PixelBuffer.DangerousGetRowSpan(row)[..width];
             stripPixelsRow.CopyTo(stripPixels.Slice(stripPixelsRowIdx * width, width));
             stripPixelsRowIdx++;
         }

src/ImageSharp/Formats/Tiff/Writers/TiffGrayL16Writer{TPixel}.cs

@@ -9,8 +9,13 @@ namespace SixLabors.ImageSharp.Formats.Tiff.Writers;
 internal sealed class TiffGrayL16Writer<TPixel> : TiffCompositeColorWriter<TPixel>
     where TPixel : unmanaged, IPixel<TPixel>
 {
-    public TiffGrayL16Writer(ImageFrame<TPixel> image, MemoryAllocator memoryAllocator, Configuration configuration, TiffEncoderEntriesCollector entriesCollector)
+    public TiffGrayL16Writer(
-        : base(image, memoryAllocator, configuration, entriesCollector)
+        ImageFrame<TPixel> image,
+        Size encodingSize,
+        MemoryAllocator memoryAllocator,
+        Configuration configuration,
+        TiffEncoderEntriesCollector entriesCollector)
+        : base(image, encodingSize, memoryAllocator, configuration, entriesCollector)
     {
     }
 
@@ -18,5 +23,6 @@ internal sealed class TiffGrayL16Writer<TPixel> : TiffCompositeColorWriter<TPixe
     public override int BitsPerPixel => 16;
 
     /// <inheritdoc />
-    protected override void EncodePixels(Span<TPixel> pixels, Span<byte> buffer) => PixelOperations<TPixel>.Instance.ToL16Bytes(this.Configuration, pixels, buffer, pixels.Length);
+    protected override void EncodePixels(Span<TPixel> pixels, Span<byte> buffer)
+        => PixelOperations<TPixel>.Instance.ToL16Bytes(this.Configuration, pixels, buffer, pixels.Length);
 }

src/ImageSharp/Formats/Tiff/Writers/TiffGrayWriter{TPixel}.cs

@@ -9,8 +9,13 @@ namespace SixLabors.ImageSharp.Formats.Tiff.Writers;
 internal sealed class TiffGrayWriter<TPixel> : TiffCompositeColorWriter<TPixel>
     where TPixel : unmanaged, IPixel<TPixel>
 {
-    public TiffGrayWriter(ImageFrame<TPixel> image, MemoryAllocator memoryAllocator, Configuration configuration, TiffEncoderEntriesCollector entriesCollector)
+    public TiffGrayWriter(
-        : base(image, memoryAllocator, configuration, entriesCollector)
+        ImageFrame<TPixel> image,
+        Size encodingSize,
+        MemoryAllocator memoryAllocator,
+        Configuration configuration,
+        TiffEncoderEntriesCollector entriesCollector)
+        : base(image, encodingSize, memoryAllocator, configuration, entriesCollector)
     {
     }
 
@@ -18,5 +23,6 @@ internal sealed class TiffGrayWriter<TPixel> : TiffCompositeColorWriter<TPixel>
     public override int BitsPerPixel => 8;
 
     /// <inheritdoc />
-    protected override void EncodePixels(Span<TPixel> pixels, Span<byte> buffer) => PixelOperations<TPixel>.Instance.ToL8Bytes(this.Configuration, pixels, buffer, pixels.Length);
+    protected override void EncodePixels(Span<TPixel> pixels, Span<byte> buffer)
+        => PixelOperations<TPixel>.Instance.ToL8Bytes(this.Configuration, pixels, buffer, pixels.Length);
 }

src/ImageSharp/Formats/Tiff/Writers/TiffPaletteWriter{TPixel}.cs

@@ -23,13 +23,14 @@ internal sealed class TiffPaletteWriter<TPixel> : TiffBaseColorWriter<TPixel>
 
     public TiffPaletteWriter(
         ImageFrame<TPixel> frame,
+        Size encodingSize,
         IQuantizer quantizer,
         IPixelSamplingStrategy pixelSamplingStrategy,
         MemoryAllocator memoryAllocator,
         Configuration configuration,
         TiffEncoderEntriesCollector entriesCollector,
         int bitsPerPixel)
-         : base(frame, memoryAllocator, configuration, entriesCollector)
+         : base(frame, encodingSize, memoryAllocator, configuration, entriesCollector)
     {
         DebugGuard.NotNull(quantizer, nameof(quantizer));
         DebugGuard.NotNull(quantizer, nameof(pixelSamplingStrategy));
@@ -49,7 +50,7 @@ internal sealed class TiffPaletteWriter<TPixel> : TiffBaseColorWriter<TPixel>
             });
 
         frameQuantizer.BuildPalette(pixelSamplingStrategy, frame);
-        this.quantizedFrame = frameQuantizer.QuantizeFrame(frame, frame.Bounds());
+        this.quantizedFrame = frameQuantizer.QuantizeFrame(frame, new Rectangle(Point.Empty, encodingSize));
 
         this.AddColorMapTag();
     }
@@ -60,7 +61,7 @@ internal sealed class TiffPaletteWriter<TPixel> : TiffBaseColorWriter<TPixel>
     /// <inheritdoc />
     protected override void EncodeStrip(int y, int height, TiffBaseCompressor compressor)
     {
-        int width = this.Image.Width;
+        int width = this.quantizedFrame.Width;
 
         if (this.BitsPerPixel == 4)
         {

src/ImageSharp/Formats/Tiff/Writers/TiffRgbWriter{TPixel}.cs

@@ -9,8 +9,13 @@ namespace SixLabors.ImageSharp.Formats.Tiff.Writers;
 internal sealed class TiffRgbWriter<TPixel> : TiffCompositeColorWriter<TPixel>
     where TPixel : unmanaged, IPixel<TPixel>
 {
-    public TiffRgbWriter(ImageFrame<TPixel> image, MemoryAllocator memoryAllocator, Configuration configuration, TiffEncoderEntriesCollector entriesCollector)
+    public TiffRgbWriter(
-        : base(image, memoryAllocator, configuration, entriesCollector)
+        ImageFrame<TPixel> image,
+        Size encodingSize,
+        MemoryAllocator memoryAllocator,
+        Configuration configuration,
+        TiffEncoderEntriesCollector entriesCollector)
+        : base(image, encodingSize, memoryAllocator, configuration, entriesCollector)
     {
     }
 
@@ -18,5 +23,6 @@ internal sealed class TiffRgbWriter<TPixel> : TiffCompositeColorWriter<TPixel>
     public override int BitsPerPixel => 24;
 
     /// <inheritdoc />
-    protected override void EncodePixels(Span<TPixel> pixels, Span<byte> buffer) => PixelOperations<TPixel>.Instance.ToRgb24Bytes(this.Configuration, pixels, buffer, pixels.Length);
+    protected override void EncodePixels(Span<TPixel> pixels, Span<byte> buffer)
+        => PixelOperations<TPixel>.Instance.ToRgb24Bytes(this.Configuration, pixels, buffer, pixels.Length);
 }

src/ImageSharp/Formats/Webp/WebpFrameMetadata.cs

@@ -1,6 +1,8 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
 
+using SixLabors.ImageSharp.PixelFormats;
+
 namespace SixLabors.ImageSharp.Formats.Webp;
 
 /// <summary>
@@ -61,6 +63,12 @@ public class WebpFrameMetadata : IFormatFrameMetadata<WebpFrameMetadata>
             BlendMode = this.BlendMethod,
         };
 
+    /// <inheritdoc/>
+    public void AfterFrameApply<TPixel>(ImageFrame<TPixel> source, ImageFrame<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+    }
+
     /// <inheritdoc/>
     IDeepCloneable IDeepCloneable.DeepClone() => this.DeepClone();
 

src/ImageSharp/Formats/Webp/WebpMetadata.cs

@@ -145,6 +145,12 @@ public class WebpMetadata : IFormatMetadata<WebpMetadata>
             BackgroundColor = this.BackgroundColor
         };
 
+    /// <inheritdoc/>
+    public void AfterImageApply<TPixel>(Image<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+    }
+
     /// <inheritdoc/>
     IDeepCloneable IDeepCloneable.DeepClone() => this.DeepClone();
 

src/ImageSharp/Image.cs

@@ -72,7 +72,7 @@ public abstract partial class Image : IDisposable, IConfigurationProvider
     /// <summary>
     /// Gets any metadata associated with the image.
     /// </summary>
-    public ImageMetadata Metadata { get; }
+    public ImageMetadata Metadata { get; private set; }
 
     /// <summary>
     /// Gets the size of the image in px units.
@@ -185,6 +185,12 @@ public abstract partial class Image : IDisposable, IConfigurationProvider
     /// <param name="size">The <see cref="Size"/>.</param>
     protected void UpdateSize(Size size) => this.Size = size;
 
+    /// <summary>
+    /// Updates the metadata of the image after mutation.
+    /// </summary>
+    /// <param name="metadata">The <see cref="Metadata"/>.</param>
+    protected void UpdateMetadata(ImageMetadata metadata) => this.Metadata = metadata;
+
     /// <summary>
     /// Disposes the object and frees resources for the Garbage Collector.
     /// </summary>

src/ImageSharp/ImageFrame.cs

@@ -42,7 +42,7 @@ public abstract partial class ImageFrame : IConfigurationProvider, IDisposable
     /// <summary>
     /// Gets the metadata of the frame.
     /// </summary>
-    public ImageFrameMetadata Metadata { get; }
+    public ImageFrameMetadata Metadata { get; private set; }
 
     /// <inheritdoc/>
     public Configuration Configuration { get; }
@@ -75,8 +75,14 @@ public abstract partial class ImageFrame : IConfigurationProvider, IDisposable
         where TDestinationPixel : unmanaged, IPixel<TDestinationPixel>;
 
     /// <summary>
-    /// Updates the size of the image frame.
+    /// Updates the size of the image frame after mutation.
     /// </summary>
-    /// <param name="size">The size.</param>
+    /// <param name="size">The <see cref="Size"/>.</param>
     protected void UpdateSize(Size size) => this.Size = size;
+
+    /// <summary>
+    /// Updates the metadata of the image frame after mutation.
+    /// </summary>
+    /// <param name="metadata">The <see cref="Metadata"/>.</param>
+    protected void UpdateMetadata(ImageFrameMetadata metadata) => this.Metadata = metadata;
 }

src/ImageSharp/ImageFrame{TPixel}.cs

@@ -331,17 +331,29 @@ public sealed class ImageFrame<TPixel> : ImageFrame, IPixelSource<TPixel>
     }
 
     /// <summary>
-    /// Switches the buffers used by the image and the pixelSource meaning that the Image will "own" the buffer from the pixelSource and the pixelSource will now own the Images buffer.
+    /// Switches the buffers used by the image and the pixel source meaning that the Image will "own" the buffer
+    /// from the pixelSource and the pixel source will now own the Image buffer.
     /// </summary>
-    /// <param name="pixelSource">The pixel source.</param>
+    /// <param name="source">The pixel source.</param>
-    internal void SwapOrCopyPixelsBufferFrom(ImageFrame<TPixel> pixelSource)
+    internal void SwapOrCopyPixelsBufferFrom(ImageFrame<TPixel> source)
     {
-        Guard.NotNull(pixelSource, nameof(pixelSource));
+        Guard.NotNull(source, nameof(source));
 
-        Buffer2D<TPixel>.SwapOrCopyContent(this.PixelBuffer, pixelSource.PixelBuffer);
+        Buffer2D<TPixel>.SwapOrCopyContent(this.PixelBuffer, source.PixelBuffer);
         this.UpdateSize(this.PixelBuffer.Size());
     }
 
+    /// <summary>
+    /// Copies the metadata from the source image.
+    /// </summary>
+    /// <param name="source">The metadata source.</param>
+    internal void CopyMetadataFrom(ImageFrame<TPixel> source)
+    {
+        Guard.NotNull(source, nameof(source));
+
+        this.UpdateMetadata(source.Metadata);
+    }
+
     /// <inheritdoc/>
     protected override void Dispose(bool disposing)
     {

src/ImageSharp/Image{TPixel}.cs

@@ -395,22 +395,42 @@ public sealed class Image<TPixel> : Image
     }
 
     /// <summary>
-    /// Switches the buffers used by the image and the pixelSource meaning that the Image will "own" the buffer from the pixelSource and the pixelSource will now own the Images buffer.
+    /// Switches the buffers used by the image and the pixel source meaning that the Image will
+    /// "own" the buffer from the pixelSource and the pixel source will now own the Image buffer.
     /// </summary>
-    /// <param name="pixelSource">The pixel source.</param>
+    /// <param name="source">The pixel source.</param>
-    internal void SwapOrCopyPixelsBuffersFrom(Image<TPixel> pixelSource)
+    internal void SwapOrCopyPixelsBuffersFrom(Image<TPixel> source)
     {
-        Guard.NotNull(pixelSource, nameof(pixelSource));
+        Guard.NotNull(source, nameof(source));
 
         this.EnsureNotDisposed();
 
-        ImageFrameCollection<TPixel> sourceFrames = pixelSource.Frames;
+        ImageFrameCollection<TPixel> sourceFrames = source.Frames;
         for (int i = 0; i < this.frames.Count; i++)
         {
             this.frames[i].SwapOrCopyPixelsBufferFrom(sourceFrames[i]);
         }
 
-        this.UpdateSize(pixelSource.Size);
+        this.UpdateSize(source.Size);
+    }
+
+    /// <summary>
+    /// Copies the metadata from the source image.
+    /// </summary>
+    /// <param name="source">The metadata source.</param>
+    internal void CopyMetadataFrom(Image<TPixel> source)
+    {
+        Guard.NotNull(source, nameof(source));
+
+        this.EnsureNotDisposed();
+
+        ImageFrameCollection<TPixel> sourceFrames = source.Frames;
+        for (int i = 0; i < this.frames.Count; i++)
+        {
+            this.frames[i].CopyMetadataFrom(sourceFrames[i]);
+        }
+
+        this.UpdateMetadata(source.Metadata);
     }
 
     private static Size ValidateFramesAndGetSize(IEnumerable<ImageFrame<TPixel>> frames)

src/ImageSharp/Metadata/ImageFrameMetadata.cs

@@ -7,6 +7,7 @@ using SixLabors.ImageSharp.Metadata.Profiles.Exif;
 using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using SixLabors.ImageSharp.Metadata.Profiles.Iptc;
 using SixLabors.ImageSharp.Metadata.Profiles.Xmp;
+using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp.Metadata;
 
@@ -110,16 +111,23 @@ public sealed class ImageFrameMetadata : IDeepCloneable<ImageFrameMetadata>
             && this.formatMetadata.TryGetValue(this.DecodedImageFormat, out IFormatFrameMetadata? decodedMetadata))
         {
             TFormatFrameMetadata derivedMeta = TFormatFrameMetadata.FromFormatConnectingFrameMetadata(decodedMetadata.ToFormatConnectingFrameMetadata());
-            this.formatMetadata[key] = derivedMeta;
+            this.SetFormatMetadata(key, derivedMeta);
             return derivedMeta;
         }
 
         TFormatFrameMetadata newMeta = key.CreateDefaultFormatFrameMetadata();
-        this.formatMetadata[key] = newMeta;
+        this.SetFormatMetadata(key, newMeta);
         return newMeta;
     }
 
-    internal void SetFormatMetadata<TFormatMetadata, TFormatFrameMetadata>(IImageFormat<TFormatMetadata, TFormatFrameMetadata> key, TFormatFrameMetadata value)
+    /// <summary>
+    /// Sets the metadata value associated with the specified key.
+    /// </summary>
+    /// <typeparam name="TFormatMetadata">The type of format metadata.</typeparam>
+    /// <typeparam name="TFormatFrameMetadata">The type of format frame metadata.</typeparam>
+    /// <param name="key">The key of the value to set.</param>
+    /// <param name="value">The value to set.</param>
+    public void SetFormatMetadata<TFormatMetadata, TFormatFrameMetadata>(IImageFormat<TFormatMetadata, TFormatFrameMetadata> key, TFormatFrameMetadata value)
         where TFormatMetadata : class
         where TFormatFrameMetadata : class, IFormatFrameMetadata<TFormatFrameMetadata>
         => this.formatMetadata[key] = value;
@@ -143,4 +151,23 @@ public sealed class ImageFrameMetadata : IDeepCloneable<ImageFrameMetadata>
     /// Synchronizes the profiles with the current metadata.
     /// </summary>
     internal void SynchronizeProfiles() => this.ExifProfile?.Sync(this);
+
+    /// <summary>
+    /// This method is called after a process has been applied to the image frame.
+    /// </summary>
+    /// <typeparam name="TPixel">The type of pixel format.</typeparam>
+    /// <param name="source">The source image frame.</param>
+    /// <param name="destination">The destination image frame.</param>
+    internal void AfterFrameApply<TPixel>(ImageFrame<TPixel> source, ImageFrame<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+        // Always updated using the full frame dimensions.
+        // Individual format frame metadata will update with sub region dimensions if appropriate.
+        this.ExifProfile?.SyncDimensions(destination.Width, destination.Height);
+
+        foreach (KeyValuePair<IImageFormat, IFormatFrameMetadata> meta in this.formatMetadata)
+        {
+            meta.Value.AfterFrameApply(source, destination);
+        }
+    }
 }

src/ImageSharp/Metadata/ImageMetadata.cs

@@ -230,6 +230,22 @@ public sealed class ImageMetadata : IDeepCloneable<ImageMetadata>
     /// </summary>
     internal void SynchronizeProfiles() => this.ExifProfile?.Sync(this);
 
+    /// <summary>
+    /// This method is called after a process has been applied to the image.
+    /// </summary>
+    /// <typeparam name="TPixel">The type of pixel format.</typeparam>
+    /// <param name="destination">The destination image.</param>
+    internal void AfterImageApply<TPixel>(Image<TPixel> destination)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+        this.ExifProfile?.SyncDimensions(destination.Width, destination.Height);
+
+        foreach (KeyValuePair<IImageFormat, IFormatMetadata> meta in this.formatMetadata)
+        {
+            meta.Value.AfterImageApply(destination);
+        }
+    }
+
     internal PixelTypeInfo GetDecodedPixelTypeInfo()
     {
         // None found. Check if we have a decoded format to convert from.

src/ImageSharp/Metadata/Profiles/Exif/ExifProfile.cs

@@ -3,6 +3,7 @@
 
 using System.Diagnostics.CodeAnalysis;
 using SixLabors.ImageSharp.PixelFormats;
+using static System.Runtime.InteropServices.JavaScript.JSType;
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Exif;
 
@@ -298,6 +299,19 @@ public sealed class ExifProfile : IDeepCloneable<ExifProfile>
         this.SyncResolution(ExifTag.YResolution, metadata.VerticalResolution);
     }
 
+    internal void SyncDimensions(int width, int height)
+    {
+        if (this.TryGetValue(ExifTag.PixelXDimension, out _))
+        {
+            this.SetValue(ExifTag.PixelXDimension, width);
+        }
+
+        if (this.TryGetValue(ExifTag.PixelYDimension, out _))
+        {
+            this.SetValue(ExifTag.PixelYDimension, height);
+        }
+    }
+
     /// <summary>
     /// Synchronizes the profiles with the specified metadata.
     /// </summary>

src/ImageSharp/Processing/Processors/CloningImageProcessor{TPixel}.cs

@@ -48,7 +48,6 @@ public abstract class CloningImageProcessor<TPixel> : ICloningImageProcessor<TPi
         Image<TPixel> clone = this.CreateTarget();
         this.CheckFrameCount(this.Source, clone);
 
-        Configuration configuration = this.Configuration;
         this.BeforeImageApply(clone);
 
         for (int i = 0; i < this.Source.Frames.Count; i++)
@@ -77,9 +76,10 @@ public abstract class CloningImageProcessor<TPixel> : ICloningImageProcessor<TPi
         {
             clone = ((ICloningImageProcessor<TPixel>)this).CloneAndExecute();
 
-            // We now need to move the pixel data/size data from the clone to the source.
+            // We now need to move the pixel data/size data and any metadata from the clone to the source.
             this.CheckFrameCount(this.Source, clone);
             this.Source.SwapOrCopyPixelsBuffersFrom(clone);
+            this.Source.CopyMetadataFrom(clone);
         }
         finally
         {
@@ -157,7 +157,7 @@ public abstract class CloningImageProcessor<TPixel> : ICloningImageProcessor<TPi
         Size destinationSize = this.GetDestinationSize();
 
         // We will always be creating the clone even for mutate because we may need to resize the canvas.
-        var destinationFrames = new ImageFrame<TPixel>[source.Frames.Count];
+        ImageFrame<TPixel>[] destinationFrames = new ImageFrame<TPixel>[source.Frames.Count];
         for (int i = 0; i < destinationFrames.Length; i++)
         {
             destinationFrames[i] = new ImageFrame<TPixel>(

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

@@ -1,39 +0,0 @@
-// Copyright (c) Six Labors.
-// Licensed under the Six Labors Split License.
-
-using SixLabors.ImageSharp.Metadata.Profiles.Exif;
-using SixLabors.ImageSharp.PixelFormats;
-
-namespace SixLabors.ImageSharp.Processing.Processors.Transforms;
-
-/// <summary>
-/// Contains helper methods for working with transforms.
-/// </summary>
-internal static class TransformProcessorHelpers
-{
-    /// <summary>
-    /// Updates the dimensional metadata of a transformed image
-    /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    /// <param name="image">The image to update</param>
-    public static void UpdateDimensionalMetadata<TPixel>(Image<TPixel> image)
-        where TPixel : unmanaged, IPixel<TPixel>
-    {
-        ExifProfile? profile = image.Metadata.ExifProfile;
-        if (profile is null)
-        {
-            return;
-        }
-
-        // Only set the value if it already exists.
-        if (profile.TryGetValue(ExifTag.PixelXDimension, out _))
-        {
-            profile.SetValue(ExifTag.PixelXDimension, image.Width);
-        }
-
-        if (profile.TryGetValue(ExifTag.PixelYDimension, out _))
-        {
-            profile.SetValue(ExifTag.PixelYDimension, image.Height);
-        }
-    }
-}

src/ImageSharp/Processing/Processors/Transforms/TransformProcessor.cs → src/ImageSharp/Processing/Processors/Transforms/TransformProcessor{TPixel}.cs

@@ -23,10 +23,17 @@ internal abstract class TransformProcessor<TPixel> : CloningImageProcessor<TPixe
     {
     }
 
+    /// <inheritdoc/>
+    protected override void AfterFrameApply(ImageFrame<TPixel> source, ImageFrame<TPixel> destination)
+    {
+        base.AfterFrameApply(source, destination);
+        destination.Metadata.AfterFrameApply(source, destination);
+    }
+
     /// <inheritdoc/>
     protected override void AfterImageApply(Image<TPixel> destination)
     {
-        TransformProcessorHelpers.UpdateDimensionalMetadata(destination);
         base.AfterImageApply(destination);
+        destination.Metadata.AfterImageApply(destination);
     }
 }

tests/ImageSharp.Tests/Formats/Tiff/TiffEncoderTests.cs

@@ -4,6 +4,7 @@
 using SixLabors.ImageSharp.Formats.Tiff;
 using SixLabors.ImageSharp.Formats.Tiff.Constants;
 using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
 using static SixLabors.ImageSharp.Tests.TestImages.Tiff;
 
 namespace SixLabors.ImageSharp.Tests.Formats.Tiff;
@@ -292,6 +293,82 @@ public class TiffEncoderTests : TiffEncoderBaseTester
         Assert.Equal(expectedCompression, frameMetaData.Compression);
     }
 
+    [Theory]
+    [WithFile(MultiFrameMipMap, PixelTypes.Rgba32)]
+    public void TiffEncoder_EncodesMultiFrameMipMap<TPixel>(TestImageProvider<TPixel> provider)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+        using Image<TPixel> image = provider.GetImage(TiffDecoder.Instance);
+        Assert.Equal(7, image.Frames.Count);
+
+        using MemoryStream memStream = new();
+        image.SaveAsTiff(memStream);
+
+        memStream.Position = 0;
+        using Image<TPixel> output = Image.Load<TPixel>(memStream);
+
+        Assert.Equal(image.Size, output.Size);
+        Assert.Equal(image.Frames.Count, output.Frames.Count);
+
+        for (int i = 0; i < image.Frames.Count; i++)
+        {
+            TiffFrameMetadata inputMetadata = image.Frames[i].Metadata.GetTiffMetadata();
+            TiffFrameMetadata outputMetadata = output.Frames[i].Metadata.GetTiffMetadata();
+
+            Assert.Equal(inputMetadata.EncodingWidth, outputMetadata.EncodingWidth);
+            Assert.Equal(inputMetadata.EncodingHeight, outputMetadata.EncodingHeight);
+        }
+    }
+
+    [Theory]
+    [WithFile(MultiFrameMipMap, PixelTypes.Rgba32)]
+    public void TiffEncoder_EncodesMultiFrameMipMap_WithScaling<TPixel>(TestImageProvider<TPixel> provider)
+    where TPixel : unmanaged, IPixel<TPixel>
+    {
+        using Image<TPixel> image = provider.GetImage(TiffDecoder.Instance);
+        Assert.Equal(7, image.Frames.Count);
+
+        Size size = image.Size;
+
+        List<Size> encodedDimensions = [];
+        foreach (ImageFrame<TPixel> frame in image.Frames)
+        {
+            TiffFrameMetadata metadata = frame.Metadata.GetTiffMetadata();
+            encodedDimensions.Add(new Size(metadata.EncodingWidth, metadata.EncodingHeight));
+        }
+
+        const int scale = 2;
+        image.Mutate(x => x.Resize(image.Width / scale, image.Height / scale));
+
+        using MemoryStream memStream = new();
+        image.SaveAsTiff(memStream);
+
+        memStream.Position = 0;
+        using Image<TPixel> output = Image.Load<TPixel>(memStream);
+
+        Assert.Equal(image.Size, output.Size);
+        Assert.Equal(image.Frames.Count, output.Frames.Count);
+
+        // The encoded dimensions should automatically be scaled down by the
+        // horizontal and vertical scaling factors.
+        float ratioX = output.Width / (float)size.Width;
+        float ratioY = output.Height / (float)size.Height;
+
+        for (int i = 0; i < image.Frames.Count; i++)
+        {
+            TiffFrameMetadata inputMetadata = image.Frames[i].Metadata.GetTiffMetadata();
+            TiffFrameMetadata outputMetadata = output.Frames[i].Metadata.GetTiffMetadata();
+
+            int expectedWidth = (int)MathF.Ceiling(encodedDimensions[i].Width * ratioX);
+            int expectedHeight = (int)MathF.Ceiling(encodedDimensions[i].Height * ratioY);
+
+            Assert.Equal(expectedWidth, inputMetadata.EncodingWidth);
+            Assert.Equal(expectedHeight, inputMetadata.EncodingHeight);
+            Assert.Equal(inputMetadata.EncodingWidth, outputMetadata.EncodingWidth);
+            Assert.Equal(inputMetadata.EncodingHeight, outputMetadata.EncodingHeight);
+        }
+    }
+
     // This makes sure, that when decoding a planar tiff, the planar configuration is not carried over to the encoded image.
     [Theory]
     [WithFile(FlowerRgb444Planar, PixelTypes.Rgba32)]

tests/ImageSharp.Tests/Processing/Transforms/TransformsHelpersTest.cs

@@ -1,35 +0,0 @@
-// Copyright (c) Six Labors.
-// Licensed under the Six Labors Split License.
-
-using SixLabors.ImageSharp.Metadata.Profiles.Exif;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing.Processors.Transforms;
-using SixLabors.ImageSharp.Tests.TestUtilities;
-
-namespace SixLabors.ImageSharp.Tests.Processing.Transforms;
-
-[Trait("Category", "Processors")]
-public class TransformsHelpersTest
-{
-    [Fact]
-    public void HelperCanChangeExifDataType()
-    {
-        int xy = 1;
-
-        using (var img = new Image<A8>(xy, xy))
-        {
-            var profile = new ExifProfile();
-            img.Metadata.ExifProfile = profile;
-            profile.SetValue(ExifTag.PixelXDimension, xy + ushort.MaxValue);
-            profile.SetValue(ExifTag.PixelYDimension, xy + ushort.MaxValue);
-
-            Assert.Equal(ExifDataType.Long, profile.GetValue(ExifTag.PixelXDimension).DataType);
-            Assert.Equal(ExifDataType.Long, profile.GetValue(ExifTag.PixelYDimension).DataType);
-
-            TransformProcessorHelpers.UpdateDimensionalMetadata(img);
-
-            Assert.Equal(ExifDataType.Short, profile.GetValue(ExifTag.PixelXDimension).DataType);
-            Assert.Equal(ExifDataType.Short, profile.GetValue(ExifTag.PixelYDimension).DataType);
-        }
-    }
-}