Make decoder cancellation token default.

src/ImageSharp/Formats/IImageDecoder.cs

@@ -27,7 +27,7 @@ public interface IImageDecoder
     /// <param name="cancellationToken">The token to monitor for cancellation requests.</param>
     /// <returns>The <see cref="Task{IImageInfo}"/> object.</returns>
     /// <exception cref="ImageFormatException">Thrown if the encoded image contains errors.</exception>
-    public Task<IImageInfo> IdentifyAsync(DecoderOptions options, Stream stream, CancellationToken cancellationToken);
+    public Task<IImageInfo> IdentifyAsync(DecoderOptions options, Stream stream, CancellationToken cancellationToken = default);
 
     /// <summary>
     /// Decodes the image from the specified stream to an <see cref="Image{TPixel}"/> of a specific pixel type.
@@ -58,7 +58,7 @@ public interface IImageDecoder
     /// <param name="cancellationToken">The token to monitor for cancellation requests.</param>
     /// <returns>A <see cref="Task{Image}"/> representing the asynchronous operation.</returns>
     /// <exception cref="ImageFormatException">Thrown if the encoded image contains errors.</exception>
-    public Task<Image<TPixel>> DecodeAsync<TPixel>(DecoderOptions options, Stream stream, CancellationToken cancellationToken)
+    public Task<Image<TPixel>> DecodeAsync<TPixel>(DecoderOptions options, Stream stream, CancellationToken cancellationToken = default)
         where TPixel : unmanaged, IPixel<TPixel>;
 
     /// <summary>
@@ -69,5 +69,5 @@ public interface IImageDecoder
     /// <param name="cancellationToken">The token to monitor for cancellation requests.</param>
     /// <returns>A <see cref="Task{Image}"/> representing the asynchronous operation.</returns>
     /// <exception cref="ImageFormatException">Thrown if the encoded image contains errors.</exception>
-    public Task<Image> DecodeAsync(DecoderOptions options, Stream stream, CancellationToken cancellationToken);
+    public Task<Image> DecodeAsync(DecoderOptions options, Stream stream, CancellationToken cancellationToken = default);
 }

src/ImageSharp/Formats/ISpecializedImageDecoder{T}.cs

@@ -41,7 +41,7 @@ public interface ISpecializedImageDecoder<T> : IImageDecoder
     /// <param name="cancellationToken">The token to monitor for cancellation requests.</param>
     /// <returns>A <see cref="Task{Image}"/> representing the asynchronous operation.</returns>
     /// <exception cref="ImageFormatException">Thrown if the encoded image contains errors.</exception>
-    public Task<Image<TPixel>> DecodeAsync<TPixel>(T options, Stream stream, CancellationToken cancellationToken)
+    public Task<Image<TPixel>> DecodeAsync<TPixel>(T options, Stream stream, CancellationToken cancellationToken = default)
         where TPixel : unmanaged, IPixel<TPixel>;
 
     /// <summary>
@@ -52,5 +52,5 @@ public interface ISpecializedImageDecoder<T> : IImageDecoder
     /// <param name="cancellationToken">The token to monitor for cancellation requests.</param>
     /// <returns>A <see cref="Task{Image}"/> representing the asynchronous operation.</returns>
     /// <exception cref="ImageFormatException">Thrown if the encoded image contains errors.</exception>
-    public Task<Image> DecodeAsync(T options, Stream stream, CancellationToken cancellationToken);
+    public Task<Image> DecodeAsync(T options, Stream stream, CancellationToken cancellationToken = default);
 }

src/ImageSharp/Formats/SpecializedImageDecoder{T}.cs

@@ -30,7 +30,7 @@ public abstract class SpecializedImageDecoder<T> : ImageDecoder, ISpecializedIma
             s => this.Decode(options, s, default));
 
     /// <inheritdoc/>
-    public Task<Image<TPixel>> DecodeAsync<TPixel>(T options, Stream stream, CancellationToken cancellationToken)
+    public Task<Image<TPixel>> DecodeAsync<TPixel>(T options, Stream stream, CancellationToken cancellationToken = default)
         where TPixel : unmanaged, IPixel<TPixel>
         => WithSeekableMemoryStreamAsync(
             options.GeneralOptions,
@@ -39,7 +39,7 @@ public abstract class SpecializedImageDecoder<T> : ImageDecoder, ISpecializedIma
             cancellationToken);
 
     /// <inheritdoc/>
-    public Task<Image> DecodeAsync(T options, Stream stream, CancellationToken cancellationToken)
+    public Task<Image> DecodeAsync(T options, Stream stream, CancellationToken cancellationToken = default)
         => WithSeekableMemoryStreamAsync(
             options.GeneralOptions,
             stream,

tests/ImageSharp.Tests/Formats/Gif/GifMetadataTests.cs

@@ -128,7 +128,7 @@ public class GifMetadataTests
         var testFile = TestFile.Create(imagePath);
         using var stream = new MemoryStream(testFile.Bytes, false);
         var decoder = new GifDecoder();
-        IImageInfo image = await decoder.IdentifyAsync(DecoderOptions.Default, stream, default);
+        IImageInfo image = await decoder.IdentifyAsync(DecoderOptions.Default, stream);
         ImageMetadata meta = image.Metadata;
         Assert.Equal(xResolution, meta.HorizontalResolution);
         Assert.Equal(yResolution, meta.VerticalResolution);
@@ -156,7 +156,7 @@ public class GifMetadataTests
         var testFile = TestFile.Create(imagePath);
         using var stream = new MemoryStream(testFile.Bytes, false);
         var decoder = new GifDecoder();
-        using Image<Rgba32> image = await decoder.DecodeAsync<Rgba32>(DecoderOptions.Default, stream, default);
+        using Image<Rgba32> image = await decoder.DecodeAsync<Rgba32>(DecoderOptions.Default, stream);
         ImageMetadata meta = image.Metadata;
         Assert.Equal(xResolution, meta.HorizontalResolution);
         Assert.Equal(yResolution, meta.VerticalResolution);

tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Metadata.cs

@@ -106,7 +106,7 @@ public partial class JpegDecoderTests
         var testFile = TestFile.Create(imagePath);
         using var stream = new MemoryStream(testFile.Bytes, false);
         var decoder = new JpegDecoder();
-        IImageInfo image = await decoder.IdentifyAsync(DecoderOptions.Default, stream, default);
+        IImageInfo image = await decoder.IdentifyAsync(DecoderOptions.Default, stream);
         ImageMetadata meta = image.Metadata;
         Assert.Equal(xResolution, meta.HorizontalResolution);
         Assert.Equal(yResolution, meta.VerticalResolution);
@@ -142,7 +142,7 @@ public partial class JpegDecoderTests
     {
         var testFile = TestFile.Create(imagePath);
         using var stream = new MemoryStream(testFile.Bytes, false);
-        using Image image = await JpegDecoder.DecodeAsync(DecoderOptions.Default, stream, default);
+        using Image image = await JpegDecoder.DecodeAsync(DecoderOptions.Default, stream);
         JpegMetadata meta = image.Metadata.GetJpegMetadata();
         Assert.Equal(quality, meta.Quality);
     }

tests/ImageSharp.Tests/TestUtilities/ImageProviders/FileProvider.cs

@@ -213,7 +213,7 @@ public abstract partial class TestImageProvider<TPixel> : IXunitSerializable
             // TODO: Check Path here. Why combined?
             string path = Path.Combine(TestEnvironment.InputImagesDirectoryFullPath, this.FilePath);
             using Stream stream = System.IO.File.OpenRead(path);
-            return await decoder.DecodeAsync<TPixel>(options, stream, default);
+            return await decoder.DecodeAsync<TPixel>(options, stream);
         }
 
         public override Image<TPixel> GetImage<T>(ISpecializedImageDecoder<T> decoder, T options)
@@ -250,7 +250,7 @@ public abstract partial class TestImageProvider<TPixel> : IXunitSerializable
             // TODO: Check Path here. Why combined?
             string path = Path.Combine(TestEnvironment.InputImagesDirectoryFullPath, this.FilePath);
             using Stream stream = System.IO.File.OpenRead(path);
-            return await decoder.DecodeAsync<TPixel>(options, stream, default);
+            return await decoder.DecodeAsync<TPixel>(options, stream);
         }
 
         public override void Deserialize(IXunitSerializationInfo info)