implement adding frames metadata to tiff image metadata

src/ImageSharp/Formats/Tiff/Ifd/DirectoryReader.cs

@@ -37,7 +37,7 @@ internal class DirectoryReader
     /// Reads image file directories.
     /// </summary>
     /// <returns>Image file directories.</returns>
-    public IEnumerable<ExifProfile> Read()
+    public IList<ExifProfile> Read()
     {
         this.ByteOrder = ReadByteOrder(this.stream);
         var headerReader = new HeaderReader(this.stream, this.ByteOrder);
@@ -66,7 +66,7 @@ internal class DirectoryReader
         throw TiffThrowHelper.ThrowInvalidHeader();
     }
 
-    private IEnumerable<ExifProfile> ReadIfds(bool isBigTiff)
+    private IList<ExifProfile> ReadIfds(bool isBigTiff)
     {
         var readers = new List<EntryReader>();
         while (this.nextIfdOffset != 0 && this.nextIfdOffset < (ulong)this.stream.Length)

src/ImageSharp/Formats/Tiff/TiffDecoderCore.cs

@@ -169,7 +169,7 @@ internal class TiffDecoderCore : IImageDecoderInternals
             this.inputStream = stream;
             var reader = new DirectoryReader(stream, this.configuration.MemoryAllocator);
 
-            IEnumerable<ExifProfile> directories = reader.Read();
+            IList<ExifProfile> directories = reader.Read();
             this.byteOrder = reader.ByteOrder;
             this.isBigTiff = reader.IsBigTiff;
 
@@ -188,6 +188,8 @@ internal class TiffDecoderCore : IImageDecoderInternals
 
             ImageMetadata metadata = TiffDecoderMetadataCreator.Create(frames, this.skipMetadata, reader.ByteOrder, reader.IsBigTiff);
 
+            TiffDecoderMetadataCreator.FillFrames(metadata.GetTiffMetadata(), directories);
+
             // TODO: Tiff frames can have different sizes.
             ImageFrame<TPixel> root = frames[0];
             this.Dimensions = root.Size();
@@ -217,12 +219,15 @@ internal class TiffDecoderCore : IImageDecoderInternals
     {
         this.inputStream = stream;
         DirectoryReader reader = new(stream, this.configuration.MemoryAllocator);
-        IEnumerable<ExifProfile> directories = reader.Read();
+        IList<ExifProfile> directories = reader.Read();
 
         ExifProfile rootFrameExifProfile = directories.First();
         TiffFrameMetadata rootMetadata = TiffFrameMetadata.Parse(rootFrameExifProfile);
 
         ImageMetadata metadata = TiffDecoderMetadataCreator.Create(reader.ByteOrder, reader.IsBigTiff, rootFrameExifProfile);
+
+        TiffDecoderMetadataCreator.FillFrames(metadata.GetTiffMetadata(), directories);
+
         int width = GetImageWidth(rootFrameExifProfile);
         int height = GetImageHeight(rootFrameExifProfile);
 

src/ImageSharp/Formats/Tiff/TiffDecoderMetadataCreator.cs

@@ -61,10 +61,19 @@ internal static class TiffDecoderMetadataCreator
         TiffMetadata tiffMetadata = imageMetaData.GetTiffMetadata();
         tiffMetadata.ByteOrder = byteOrder;
         tiffMetadata.FormatType = isBigTiff ? TiffFormatType.BigTIFF : TiffFormatType.Default;
-
         return imageMetaData;
     }
 
+    public static void FillFrames(TiffMetadata tiffMetadata, IList<ExifProfile> directories)
+    {
+        foreach (ExifProfile dir in directories)
+        {
+            TiffFrameMetadata meta = TiffFormat.Instance.CreateDefaultFormatFrameMetadata();
+            TiffFrameMetadata.Parse(meta, dir);
+            tiffMetadata.Frames.Add(meta);
+        }
+    }
+
     private static void SetResolution(ImageMetadata imageMetaData, ExifProfile exifProfile)
     {
         imageMetaData.ResolutionUnits = exifProfile != null ? UnitConverter.ExifProfileToResolutionUnit(exifProfile) : PixelResolutionUnit.PixelsPerInch;

src/ImageSharp/Formats/Tiff/TiffMetadata.cs

@@ -31,6 +31,14 @@ public class TiffMetadata : IDeepCloneable
     /// </summary>
     public TiffFormatType FormatType { get; set; }
 
+    /// <summary>
+    /// Gets or sets the frames.
+    /// </summary>
+    /// <value>
+    /// The frames.
+    /// </value>
+    public IList<TiffFrameMetadata> Frames { get; set; } = new List<TiffFrameMetadata>();
+
     /// <inheritdoc/>
     public IDeepCloneable DeepClone() => new TiffMetadata(this);
 }