Cleanup and normalization

src/ImageSharp/Formats/Gif/GifDecoder.cs

@@ -3,7 +3,6 @@
 
 using System.IO;
 using System.Threading;
-using SixLabors.ImageSharp.IO;
 using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 
@@ -42,9 +41,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
             Guard.NotNull(stream, nameof(stream));
 
             var decoder = new GifDecoderCore(configuration, this);
-
-            using var bufferedStream = new BufferedReadStream(configuration, stream);
-            return decoder.Identify(bufferedStream, cancellationToken);
+            return decoder.Identify(configuration, stream, cancellationToken);
         }
     }
 }

src/ImageSharp/Formats/ImageDecoderUtilities.cs

@@ -16,7 +16,7 @@ namespace SixLabors.ImageSharp.Formats
             this IImageDecoderInternals decoder,
             Configuration configuration,
             Stream stream,
-            CancellationToken cancellationToken = default)
+            CancellationToken cancellationToken)
         {
             using var bufferedReadStream = new BufferedReadStream(configuration, stream);
 
@@ -34,7 +34,7 @@ namespace SixLabors.ImageSharp.Formats
             this IImageDecoderInternals decoder,
             Configuration configuration,
             Stream stream,
-            CancellationToken cancellationToken = default)
+            CancellationToken cancellationToken)
             where TPixel : unmanaged, IPixel<TPixel>
             => decoder.Decode<TPixel>(configuration, stream, DefaultLargeImageExceptionFactory, cancellationToken);
 
@@ -43,7 +43,7 @@ namespace SixLabors.ImageSharp.Formats
             Configuration configuration,
             Stream stream,
             Func<InvalidMemoryOperationException, Size, InvalidImageContentException> largeImageExceptionFactory,
-            CancellationToken cancellationToken = default)
+            CancellationToken cancellationToken)
             where TPixel : unmanaged, IPixel<TPixel>
         {
             using var bufferedReadStream = new BufferedReadStream(configuration, stream);
@@ -61,6 +61,6 @@ namespace SixLabors.ImageSharp.Formats
         private static InvalidImageContentException DefaultLargeImageExceptionFactory(
             InvalidMemoryOperationException memoryOperationException,
             Size dimensions) =>
-            new InvalidImageContentException(dimensions, memoryOperationException);
+            new(dimensions, memoryOperationException);
     }
 }

src/ImageSharp/Formats/Tiff/TiffDecoder.cs

@@ -21,14 +21,15 @@ namespace SixLabors.ImageSharp.Formats.Tiff
         public Image<TPixel> Decode<TPixel>(Configuration configuration, Stream stream, CancellationToken cancellationToken)
             where TPixel : unmanaged, IPixel<TPixel>
         {
-            Guard.NotNull(stream, "stream");
+            Guard.NotNull(stream, nameof(stream));
 
             var decoder = new TiffDecoderCore(configuration, this);
             return decoder.Decode<TPixel>(configuration, stream, cancellationToken);
         }
 
         /// <inheritdoc/>
-        public Image Decode(Configuration configuration, Stream stream, CancellationToken cancellationToken) => this.Decode<Rgba32>(configuration, stream, cancellationToken);
+        public Image Decode(Configuration configuration, Stream stream, CancellationToken cancellationToken)
+            => this.Decode<Rgba32>(configuration, stream, cancellationToken);
 
         /// <inheritdoc/>
         public IImageInfo Identify(Configuration configuration, Stream stream, CancellationToken cancellationToken)

src/ImageSharp/Formats/Webp/WebpDecoder.cs

@@ -38,6 +38,10 @@ namespace SixLabors.ImageSharp.Formats.Webp
             }
         }
 
+        /// <inheritdoc />
+        public Image Decode(Configuration configuration, Stream stream, CancellationToken cancellationToken)
+            => this.Decode<Rgba32>(configuration, stream, cancellationToken);
+
         /// <inheritdoc/>
         public IImageInfo Identify(Configuration configuration, Stream stream, CancellationToken cancellationToken)
         {
@@ -46,7 +50,5 @@ namespace SixLabors.ImageSharp.Formats.Webp
             return new WebpDecoderCore(configuration, this).Identify(configuration, stream, cancellationToken);
         }
 
-        /// <inheritdoc />
-        public Image Decode(Configuration configuration, Stream stream, CancellationToken cancellationToken) => this.Decode<Rgba32>(configuration, stream, cancellationToken);
     }
 }

src/ImageSharp/Image.Decode.cs

@@ -22,7 +22,7 @@ namespace SixLabors.ImageSharp
         /// The image might be filled with memory garbage.
         /// </summary>
         /// <typeparam name="TPixel">The pixel type</typeparam>
-        /// <param name="configuration">The <see cref="ImageSharp.Configuration"/></param>
+        /// <param name="configuration">The <see cref="Configuration"/></param>
         /// <param name="width">The width of the image</param>
         /// <param name="height">The height of the image</param>
         /// <param name="metadata">The <see cref="ImageMetadata"/></param>
@@ -159,7 +159,7 @@ namespace SixLabors.ImageSharp
         {
             IImageDecoder decoder = DiscoverDecoder(stream, config, out IImageFormat format);
 
-            if (!(decoder is IImageInfoDetector detector))
+            if (decoder is not IImageInfoDetector detector)
             {
                 return (null, null);
             }

src/ImageSharp/Image.FromStream.cs

@@ -432,9 +432,9 @@ namespace SixLabors.ImageSharp
         /// <exception cref="InvalidImageContentException">Image contains invalid content.</exception>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <returns>A <see cref="Task{ValueTuple}"/> representing the asynchronous operation.</returns>
-        public static async Task<(Image<TPixel> Image, IImageFormat Format)> LoadWithFormatAsync<TPixel>(Stream stream, CancellationToken cancellationToken = default)
+        public static Task<(Image<TPixel> Image, IImageFormat Format)> LoadWithFormatAsync<TPixel>(Stream stream, CancellationToken cancellationToken = default)
             where TPixel : unmanaged, IPixel<TPixel>
-            => await LoadWithFormatAsync<TPixel>(Configuration.Default, stream, cancellationToken).ConfigureAwait(false);
+            => LoadWithFormatAsync<TPixel>(Configuration.Default, stream, cancellationToken);
 
         /// <summary>
         /// Create a new instance of the <see cref="Image{TPixel}"/> class from the given stream.