Merge branch 'master' into js/deps

.github/CONTRIBUTING.md

@@ -20,6 +20,12 @@
 
 * Do not open an issue on GitHub until you have collected positive feedback about the change. GitHub issues are primarily intended for bug reports and fixes.
 
+#### **Building**
+
+ * When first cloning the repo, make sure to run `git submodule update --init --recursive` otherwise the submodules (e.g. `shared-infrastructure`) will be missing.
+
+ * Run `dotnet build` in the root of the repo, or open the ImageSharp.sln file in Visual Studio and build from there.
+
 #### **Running tests and Debugging**
 
 * Expected test output is pulled in as a submodule from the [ImageSharp.Tests.Images repository](https://github.com/SixLabors/Imagesharp.Tests.Images/tree/master/ReferenceOutput). To succesfully run tests, make sure that you have updated the submodules!
@@ -27,7 +33,7 @@
 
 #### **Do you have questions about consuming the library or the source code?**
 
-* Ask any question about how to use ImageSharp in the [ImageSharp Gitter Chat Room](https://gitter.im/ImageSharp/General).
+* Ask any question about how to use ImageSharp over in the [discussions section](https://github.com/SixLabors/ImageSharp/discussions).
 
 #### Code of Conduct  
 This project has adopted the code of conduct defined by the [Contributor Covenant](https://contributor-covenant.org/) to clarify expected behavior in our community.

src/ImageSharp/Formats/Bmp/ImageExtensions.cs

@@ -1,8 +1,8 @@
-// Copyright (c) Six Labors.
+// Copyright (c) Six Labors.
 // Licensed under the Apache License, Version 2.0.
 
 using System.IO;
-
+using System.Threading.Tasks;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Formats.Bmp;
 
@@ -13,13 +13,64 @@ namespace SixLabors.ImageSharp
     /// </summary>
     public static partial class ImageExtensions
     {
+        /// <summary>
+        /// Saves the image to the given stream with the bmp format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        public static void SaveAsBmp(this Image source, string path) => SaveAsBmp(source, path, null);
+
+        /// <summary>
+        /// Saves the image to the given stream with the bmp format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsBmpAsync(this Image source, string path) => SaveAsBmpAsync(source, path, null);
+
+        /// <summary>
+        /// Saves the image to the given stream with the bmp format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        public static void SaveAsBmp(this Image source, string path, BmpEncoder encoder) =>
+            source.Save(
+                path,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(BmpFormat.Instance));
+
+        /// <summary>
+        /// Saves the image to the given stream with the bmp format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsBmpAsync(this Image source, string path, BmpEncoder encoder) =>
+            source.SaveAsync(
+                path,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(BmpFormat.Instance));
+
+        /// <summary>
+        /// Saves the image to the given stream with the bmp format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="stream">The stream to save the image to.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
+        public static void SaveAsBmp(this Image source, Stream stream) => SaveAsBmp(source, stream, null);
+
         /// <summary>
         /// Saves the image to the given stream with the bmp format.
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="stream">The stream to save the image to.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        public static void SaveAsBmp(this Image source, Stream stream) => source.SaveAsBmp(stream, null);
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsBmpAsync(this Image source, Stream stream) => SaveAsBmpAsync(source, stream, null);
 
         /// <summary>
         /// Saves the image to the given stream with the bmp format.
@@ -32,5 +83,18 @@ namespace SixLabors.ImageSharp
             source.Save(
                 stream,
                 encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(BmpFormat.Instance));
+
+        /// <summary>
+        /// Saves the image to the given stream with the bmp format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="stream">The stream to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsBmpAsync(this Image source, Stream stream, BmpEncoder encoder) =>
+            source.SaveAsync(
+                stream,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(BmpFormat.Instance));
     }
-}
+}

src/ImageSharp/Formats/Gif/ImageExtensions.cs

@@ -1,8 +1,8 @@
-// Copyright (c) Six Labors.
+// Copyright (c) Six Labors.
 // Licensed under the Apache License, Version 2.0.
 
 using System.IO;
-
+using System.Threading.Tasks;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Formats.Gif;
 
@@ -14,23 +14,87 @@ namespace SixLabors.ImageSharp
     public static partial class ImageExtensions
     {
         /// <summary>
-        /// Saves the image to the given stream in the gif format.
+        /// Saves the image to the given stream with the gif format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        public static void SaveAsGif(this Image source, string path) => SaveAsGif(source, path, null);
+
+        /// <summary>
+        /// Saves the image to the given stream with the gif format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsGifAsync(this Image source, string path) => SaveAsGifAsync(source, path, null);
+
+        /// <summary>
+        /// Saves the image to the given stream with the gif format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        public static void SaveAsGif(this Image source, string path, GifEncoder encoder) =>
+            source.Save(
+                path,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(GifFormat.Instance));
+
+        /// <summary>
+        /// Saves the image to the given stream with the gif format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsGifAsync(this Image source, string path, GifEncoder encoder) =>
+            source.SaveAsync(
+                path,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(GifFormat.Instance));
+
+        /// <summary>
+        /// Saves the image to the given stream with the gif format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="stream">The stream to save the image to.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
+        public static void SaveAsGif(this Image source, Stream stream) => SaveAsGif(source, stream, null);
+
+        /// <summary>
+        /// Saves the image to the given stream with the gif format.
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="stream">The stream to save the image to.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        public static void SaveAsGif(this Image source, Stream stream) => source.SaveAsGif(stream, null);
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsGifAsync(this Image source, Stream stream) => SaveAsGifAsync(source, stream, null);
 
         /// <summary>
-        /// Saves the image to the given stream in the gif format.
+        /// Saves the image to the given stream with the gif format.
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="stream">The stream to save the image to.</param>
-        /// <param name="encoder">The options for the encoder.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
         public static void SaveAsGif(this Image source, Stream stream, GifEncoder encoder) =>
             source.Save(
                 stream,
                 encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(GifFormat.Instance));
+
+        /// <summary>
+        /// Saves the image to the given stream with the gif format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="stream">The stream to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsGifAsync(this Image source, Stream stream, GifEncoder encoder) =>
+            source.SaveAsync(
+                stream,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(GifFormat.Instance));
     }
-}
+}

src/ImageSharp/Formats/Jpeg/ImageExtensions.cs

@@ -1,8 +1,8 @@
-// Copyright (c) Six Labors.
+// Copyright (c) Six Labors.
 // Licensed under the Apache License, Version 2.0.
 
 using System.IO;
-
+using System.Threading.Tasks;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Formats.Jpeg;
 
@@ -13,6 +13,48 @@ namespace SixLabors.ImageSharp
     /// </summary>
     public static partial class ImageExtensions
     {
+        /// <summary>
+        /// Saves the image to the given stream with the jpeg format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        public static void SaveAsJpeg(this Image source, string path) => SaveAsJpeg(source, path, null);
+
+        /// <summary>
+        /// Saves the image to the given stream with the jpeg format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsJpegAsync(this Image source, string path) => SaveAsJpegAsync(source, path, null);
+
+        /// <summary>
+        /// Saves the image to the given stream with the jpeg format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        public static void SaveAsJpeg(this Image source, string path, JpegEncoder encoder) =>
+            source.Save(
+                path,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(JpegFormat.Instance));
+
+        /// <summary>
+        /// Saves the image to the given stream with the jpeg format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsJpegAsync(this Image source, string path, JpegEncoder encoder) =>
+            source.SaveAsync(
+                path,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(JpegFormat.Instance));
+
         /// <summary>
         /// Saves the image to the given stream with the jpeg format.
         /// </summary>
@@ -26,11 +68,33 @@ namespace SixLabors.ImageSharp
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="stream">The stream to save the image to.</param>
-        /// <param name="encoder">The options for the encoder.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsJpegAsync(this Image source, Stream stream) => SaveAsJpegAsync(source, stream, null);
+
+        /// <summary>
+        /// Saves the image to the given stream with the jpeg format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="stream">The stream to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
         public static void SaveAsJpeg(this Image source, Stream stream, JpegEncoder encoder) =>
             source.Save(
                 stream,
                 encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(JpegFormat.Instance));
+
+        /// <summary>
+        /// Saves the image to the given stream with the jpeg format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="stream">The stream to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsJpegAsync(this Image source, Stream stream, JpegEncoder encoder) =>
+            source.SaveAsync(
+                stream,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(JpegFormat.Instance));
     }
-}
+}

src/ImageSharp/Formats/Png/ImageExtensions.cs

@@ -1,8 +1,8 @@
-// Copyright (c) Six Labors.
+// Copyright (c) Six Labors.
 // Licensed under the Apache License, Version 2.0.
 
 using System.IO;
-
+using System.Threading.Tasks;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Formats.Png;
 
@@ -13,6 +13,48 @@ namespace SixLabors.ImageSharp
     /// </summary>
     public static partial class ImageExtensions
     {
+        /// <summary>
+        /// Saves the image to the given stream with the png format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        public static void SaveAsPng(this Image source, string path) => SaveAsPng(source, path, null);
+
+        /// <summary>
+        /// Saves the image to the given stream with the png format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsPngAsync(this Image source, string path) => SaveAsPngAsync(source, path, null);
+
+        /// <summary>
+        /// Saves the image to the given stream with the png format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        public static void SaveAsPng(this Image source, string path, PngEncoder encoder) =>
+            source.Save(
+                path,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(PngFormat.Instance));
+
+        /// <summary>
+        /// Saves the image to the given stream with the png format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsPngAsync(this Image source, string path, PngEncoder encoder) =>
+            source.SaveAsync(
+                path,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(PngFormat.Instance));
+
         /// <summary>
         /// Saves the image to the given stream with the png format.
         /// </summary>
@@ -26,11 +68,33 @@ namespace SixLabors.ImageSharp
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="stream">The stream to save the image to.</param>
-        /// <param name="encoder">The options for the encoder.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsPngAsync(this Image source, Stream stream) => SaveAsPngAsync(source, stream, null);
+
+        /// <summary>
+        /// Saves the image to the given stream with the png format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="stream">The stream to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
         public static void SaveAsPng(this Image source, Stream stream, PngEncoder encoder) =>
             source.Save(
                 stream,
                 encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(PngFormat.Instance));
+
+        /// <summary>
+        /// Saves the image to the given stream with the png format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="stream">The stream to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsPngAsync(this Image source, Stream stream, PngEncoder encoder) =>
+            source.SaveAsync(
+                stream,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(PngFormat.Instance));
     }
-}
+}

src/ImageSharp/Formats/Tga/ImageExtensions.cs

@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System.IO;
-
+using System.Threading.Tasks;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Formats.Tga;
 
@@ -13,6 +13,48 @@ namespace SixLabors.ImageSharp
     /// </summary>
     public static partial class ImageExtensions
     {
+        /// <summary>
+        /// Saves the image to the given stream with the tga format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        public static void SaveAsTga(this Image source, string path) => SaveAsTga(source, path, null);
+
+        /// <summary>
+        /// Saves the image to the given stream with the tga format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsTgaAsync(this Image source, string path) => SaveAsTgaAsync(source, path, null);
+
+        /// <summary>
+        /// Saves the image to the given stream with the tga format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        public static void SaveAsTga(this Image source, string path, TgaEncoder encoder) =>
+            source.Save(
+                path,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(TgaFormat.Instance));
+
+        /// <summary>
+        /// Saves the image to the given stream with the tga format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="path">The file path to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the path is null.</exception>
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsTgaAsync(this Image source, string path, TgaEncoder encoder) =>
+            source.SaveAsync(
+                path,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(TgaFormat.Instance));
+
         /// <summary>
         /// Saves the image to the given stream with the tga format.
         /// </summary>
@@ -26,11 +68,33 @@ namespace SixLabors.ImageSharp
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="stream">The stream to save the image to.</param>
-        /// <param name="encoder">The options for the encoder.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsTgaAsync(this Image source, Stream stream) => SaveAsTgaAsync(source, stream, null);
+
+        /// <summary>
+        /// Saves the image to the given stream with the tga format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="stream">The stream to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
         public static void SaveAsTga(this Image source, Stream stream, TgaEncoder encoder) =>
             source.Save(
                 stream,
                 encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(TgaFormat.Instance));
+
+        /// <summary>
+        /// Saves the image to the given stream with the tga format.
+        /// </summary>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="stream">The stream to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
+        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        public static Task SaveAsTgaAsync(this Image source, Stream stream, TgaEncoder encoder) =>
+            source.SaveAsync(
+                stream,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(TgaFormat.Instance));
     }
 }

tests/ImageSharp.Tests/Formats/Bmp/ImageExtensionsTest.cs

@@ -0,0 +1,155 @@
+// Copyright (c) Six Labors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.IO;
+using System.Threading.Tasks;
+using SixLabors.ImageSharp.Formats;
+using SixLabors.ImageSharp.Formats.Bmp;
+using SixLabors.ImageSharp.PixelFormats;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Formats.Bmp
+{
+    public class ImageExtensionsTest
+    {
+        [Fact]
+        public void SaveAsBmp_Path()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensionsTest));
+            string file = Path.Combine(dir, "SaveAsBmp_Path.bmp");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsBmp(file);
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/bmp", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsBmpAsync_Path()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensionsTest));
+            string file = Path.Combine(dir, "SaveAsBmpAsync_Path.bmp");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsBmpAsync(file);
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/bmp", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public void SaveAsBmp_Path_Encoder()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensions));
+            string file = Path.Combine(dir, "SaveAsBmp_Path_Encoder.bmp");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsBmp(file, new BmpEncoder());
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/bmp", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsBmpAsync_Path_Encoder()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensions));
+            string file = Path.Combine(dir, "SaveAsBmpAsync_Path_Encoder.bmp");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsBmpAsync(file, new BmpEncoder());
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/bmp", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public void SaveAsBmp_Stream()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsBmp(memoryStream);
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/bmp", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsBmpAsync_StreamAsync()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsBmpAsync(memoryStream);
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/bmp", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public void SaveAsBmp_Stream_Encoder()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsBmp(memoryStream, new BmpEncoder());
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/bmp", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsBmpAsync_Stream_Encoder()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsBmpAsync(memoryStream, new BmpEncoder());
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/bmp", mime.DefaultMimeType);
+            }
+        }
+    }
+}

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

@@ -0,0 +1,155 @@
+// Copyright (c) Six Labors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.IO;
+using System.Threading.Tasks;
+using SixLabors.ImageSharp.Formats;
+using SixLabors.ImageSharp.Formats.Gif;
+using SixLabors.ImageSharp.PixelFormats;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Formats.Gif
+{
+    public class ImageExtensionsTest
+    {
+        [Fact]
+        public void SaveAsGif_Path()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensionsTest));
+            string file = Path.Combine(dir, "SaveAsGif_Path.gif");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsGif(file);
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/gif", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsGifAsync_Path()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensionsTest));
+            string file = Path.Combine(dir, "SaveAsGifAsync_Path.gif");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsGifAsync(file);
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/gif", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public void SaveAsGif_Path_Encoder()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensions));
+            string file = Path.Combine(dir, "SaveAsGif_Path_Encoder.gif");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsGif(file, new GifEncoder());
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/gif", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsGifAsync_Path_Encoder()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensions));
+            string file = Path.Combine(dir, "SaveAsGifAsync_Path_Encoder.gif");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsGifAsync(file, new GifEncoder());
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/gif", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public void SaveAsGif_Stream()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsGif(memoryStream);
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/gif", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsGifAsync_StreamAsync()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsGifAsync(memoryStream);
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/gif", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public void SaveAsGif_Stream_Encoder()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsGif(memoryStream, new GifEncoder());
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/gif", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsGifAsync_Stream_Encoder()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsGifAsync(memoryStream, new GifEncoder());
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/gif", mime.DefaultMimeType);
+            }
+        }
+    }
+}

tests/ImageSharp.Tests/Formats/Jpg/ImageExtensionsTest.cs

@@ -0,0 +1,155 @@
+// Copyright (c) Six Labors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.IO;
+using System.Threading.Tasks;
+using SixLabors.ImageSharp.Formats;
+using SixLabors.ImageSharp.Formats.Jpeg;
+using SixLabors.ImageSharp.PixelFormats;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Formats.Jpg
+{
+    public class ImageExtensionsTest
+    {
+        [Fact]
+        public void SaveAsJpeg_Path()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensionsTest));
+            string file = Path.Combine(dir, "SaveAsJpeg_Path.jpg");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsJpeg(file);
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/jpeg", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsJpegAsync_Path()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensionsTest));
+            string file = Path.Combine(dir, "SaveAsJpegAsync_Path.jpg");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsJpegAsync(file);
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/jpeg", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public void SaveAsJpeg_Path_Encoder()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensions));
+            string file = Path.Combine(dir, "SaveAsJpeg_Path_Encoder.jpg");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsJpeg(file, new JpegEncoder());
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/jpeg", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsJpegAsync_Path_Encoder()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensions));
+            string file = Path.Combine(dir, "SaveAsJpegAsync_Path_Encoder.jpg");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsJpegAsync(file, new JpegEncoder());
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/jpeg", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public void SaveAsJpeg_Stream()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsJpeg(memoryStream);
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/jpeg", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsJpegAsync_StreamAsync()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsJpegAsync(memoryStream);
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/jpeg", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public void SaveAsJpeg_Stream_Encoder()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsJpeg(memoryStream, new JpegEncoder());
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/jpeg", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsJpegAsync_Stream_Encoder()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsJpegAsync(memoryStream, new JpegEncoder());
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/jpeg", mime.DefaultMimeType);
+            }
+        }
+    }
+}

tests/ImageSharp.Tests/Formats/Png/ImageExtensionsTest.cs

@@ -0,0 +1,155 @@
+// Copyright (c) Six Labors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.IO;
+using System.Threading.Tasks;
+using SixLabors.ImageSharp.Formats;
+using SixLabors.ImageSharp.Formats.Png;
+using SixLabors.ImageSharp.PixelFormats;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Formats.Png
+{
+    public class ImageExtensionsTest
+    {
+        [Fact]
+        public void SaveAsPng_Path()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensionsTest));
+            string file = Path.Combine(dir, "SaveAsPng_Path.png");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsPng(file);
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/png", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsPngAsync_Path()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensionsTest));
+            string file = Path.Combine(dir, "SaveAsPngAsync_Path.png");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsPngAsync(file);
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/png", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public void SaveAsPng_Path_Encoder()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensions));
+            string file = Path.Combine(dir, "SaveAsPng_Path_Encoder.png");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsPng(file, new PngEncoder());
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/png", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsPngAsync_Path_Encoder()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensions));
+            string file = Path.Combine(dir, "SaveAsPngAsync_Path_Encoder.png");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsPngAsync(file, new PngEncoder());
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/png", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public void SaveAsPng_Stream()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsPng(memoryStream);
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/png", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsPngAsync_StreamAsync()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsPngAsync(memoryStream);
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/png", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public void SaveAsPng_Stream_Encoder()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsPng(memoryStream, new PngEncoder());
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/png", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsPngAsync_Stream_Encoder()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsPngAsync(memoryStream, new PngEncoder());
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/png", mime.DefaultMimeType);
+            }
+        }
+    }
+}

tests/ImageSharp.Tests/Formats/Tga/ImageExtensionsTest.cs

@@ -0,0 +1,155 @@
+// Copyright (c) Six Labors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.IO;
+using System.Threading.Tasks;
+using SixLabors.ImageSharp.Formats;
+using SixLabors.ImageSharp.Formats.Tga;
+using SixLabors.ImageSharp.PixelFormats;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Formats.Tga
+{
+    public class ImageExtensionsTest
+    {
+        [Fact]
+        public void SaveAsTga_Path()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensionsTest));
+            string file = Path.Combine(dir, "SaveAsTga_Path.tga");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsTga(file);
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/tga", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsTgaAsync_Path()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensionsTest));
+            string file = Path.Combine(dir, "SaveAsTgaAsync_Path.tga");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsTgaAsync(file);
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/tga", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public void SaveAsTga_Path_Encoder()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensions));
+            string file = Path.Combine(dir, "SaveAsTga_Path_Encoder.tga");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsTga(file, new TgaEncoder());
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/tga", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsTgaAsync_Path_Encoder()
+        {
+            string dir = TestEnvironment.CreateOutputDirectory(nameof(ImageExtensions));
+            string file = Path.Combine(dir, "SaveAsTgaAsync_Path_Encoder.tga");
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsTgaAsync(file, new TgaEncoder());
+            }
+
+            using (Image.Load(file, out IImageFormat mime))
+            {
+                Assert.Equal("image/tga", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public void SaveAsTga_Stream()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsTga(memoryStream);
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/tga", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsTgaAsync_StreamAsync()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsTgaAsync(memoryStream);
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/tga", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public void SaveAsTga_Stream_Encoder()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                image.SaveAsTga(memoryStream, new TgaEncoder());
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/tga", mime.DefaultMimeType);
+            }
+        }
+
+        [Fact]
+        public async Task SaveAsTgaAsync_Stream_Encoder()
+        {
+            using var memoryStream = new MemoryStream();
+
+            using (var image = new Image<Rgba32>(10, 10))
+            {
+                await image.SaveAsTgaAsync(memoryStream, new TgaEncoder());
+            }
+
+            memoryStream.Position = 0;
+
+            using (Image.Load(memoryStream, out IImageFormat mime))
+            {
+                Assert.Equal("image/tga", mime.DefaultMimeType);
+            }
+        }
+    }
+}