Implemented the IEncoderOptions inside the jpeg encoder.

src/ImageSharp.Formats.Jpeg/IJpegEncoderOptions.cs

@@ -0,0 +1,29 @@
+// <copyright file="IJpegEncoderOptions.cs" company="James Jackson-South">
+// Copyright (c) James Jackson-South and contributors.
+// Licensed under the Apache License, Version 2.0.
+// </copyright>
+
+namespace ImageSharp.Formats
+{
+    /// <summary>
+    /// Encapsulates the options for the <see cref="JpegEncoder"/>.
+    /// </summary>
+    public interface IJpegEncoderOptions : IEncoderOptions
+    {
+        /// <summary>
+        /// Gets the quality, that will be used to encode the image. Quality
+        /// index must be between 0 and 100 (compression from max to min).
+        /// </summary>
+        /// <remarks>
+        /// If the quality is less than or equal to 80, the subsampling ratio will switch to <see cref="JpegSubsample.Ratio420"/>
+        /// </remarks>
+        /// <value>The quality of the jpg image from 0 to 100.</value>
+        int Quality { get; }
+
+        /// <summary>
+        /// Gets the subsample ration, that will be used to encode the image.
+        /// </summary>
+        /// <value>The subsample ratio of the jpg image.</value>
+        JpegSubsample? Subsample { get; }
+    }
+}

src/ImageSharp.Formats.Jpeg/ImageExtensions.cs

@@ -21,13 +21,18 @@ namespace ImageSharp
         /// <typeparam name="TColor">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="stream">The stream to save the image to.</param>
-        /// <param name="quality">The quality to save the image to. Between 1 and 100.</param>
+        /// <param name="options">The options for the encoder.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
         /// <returns>
         /// The <see cref="Image{TColor}"/>.
         /// </returns>
-        public static Image<TColor> SaveAsJpeg<TColor>(this Image<TColor> source, Stream stream, int quality = 75)
+        public static Image<TColor> SaveAsJpeg<TColor>(this Image<TColor> source, Stream stream, IJpegEncoderOptions options = null)
             where TColor : struct, IPixel<TColor>
-                        => source.Save(stream, new JpegEncoder { Quality = quality });
+        {
+            JpegEncoder encoder = new JpegEncoder();
+            encoder.Encode(source, stream, options);
+
+            return source;
+        }
     }
 }

src/ImageSharp.Formats.Jpeg/JpegEncoder.cs

@@ -5,7 +5,6 @@
 
 namespace ImageSharp.Formats
 {
-    using System;
     using System.IO;
 
     /// <summary>
@@ -13,73 +12,27 @@ namespace ImageSharp.Formats
     /// </summary>
     public class JpegEncoder : IImageEncoder
     {
-        /// <summary>
-        /// The quality used to encode the image.
-        /// </summary>
-        private int quality = 75;
-
-        /// <summary>
-        /// The subsamples scheme used to encode the image.
-        /// </summary>
-        private JpegSubsample subsample = JpegSubsample.Ratio420;
-
-        /// <summary>
-        /// Whether subsampling has been specifically set.
-        /// </summary>
-        private bool subsampleSet;
-
-        /// <summary>
-        /// Gets or sets the quality, that will be used to encode the image. Quality
-        /// index must be between 0 and 100 (compression from max to min).
-        /// </summary>
-        /// <remarks>
-        /// If the quality is less than or equal to 80, the subsampling ratio will switch to <see cref="JpegSubsample.Ratio420"/>
-        /// </remarks>
-        /// <value>The quality of the jpg image from 0 to 100.</value>
-        public int Quality
+        /// <inheritdoc/>
+        public void Encode<TColor>(Image<TColor> image, Stream stream, IEncoderOptions options)
+            where TColor : struct, IPixel<TColor>
         {
-            get { return this.quality; }
-            set { this.quality = value.Clamp(1, 100); }
+            IJpegEncoderOptions gifOptions = JpegEncoderOptions.Create(options);
+
+            this.Encode(image, stream, gifOptions);
         }
 
         /// <summary>
-        /// Gets or sets the subsample ration, that will be used to encode the image.
+        /// Encodes the image to the specified stream from the <see cref="Image{TColor}"/>.
         /// </summary>
-        /// <value>The subsample ratio of the jpg image.</value>
-        public JpegSubsample Subsample
-        {
-            get
-            {
-                return this.subsample;
-            }
-
-            set
-            {
-                this.subsample = value;
-                this.subsampleSet = true;
-            }
-        }
-
-        /// <inheritdoc/>
-        public void Encode<TColor>(Image<TColor> image, Stream stream, IEncoderOptions options)
+        /// <typeparam name="TColor">The pixel format.</typeparam>
+        /// <param name="image">The <see cref="Image{TColor}"/> to encode from.</param>
+        /// <param name="stream">The <see cref="Stream"/> to encode the image data to.</param>
+        /// <param name="options">The options for the encoder.</param>
+        public void Encode<TColor>(Image<TColor> image, Stream stream, IJpegEncoderOptions options)
             where TColor : struct, IPixel<TColor>
         {
-            // Ensure that quality can be set but has a fallback.
-            if (image.MetaData.Quality > 0)
-            {
-                this.Quality = image.MetaData.Quality;
-            }
-
-            JpegEncoderCore encode = new JpegEncoderCore();
-            if (this.subsampleSet)
-            {
-                encode.Encode(image, stream, this.Quality, this.Subsample);
-            }
-            else
-            {
-                // Use 4:2:0 Subsampling at quality < 91% for reduced filesize.
-                encode.Encode(image, stream, this.Quality, this.Quality >= 91 ? JpegSubsample.Ratio444 : JpegSubsample.Ratio420);
-            }
+            JpegEncoderCore encode = new JpegEncoderCore(options);
+            encode.Encode(image, stream);
         }
     }
 }

src/ImageSharp.Formats.Jpeg/JpegEncoderCore.cs

@@ -118,6 +118,11 @@ namespace ImageSharp.Formats
         /// </summary>
         private readonly byte[] huffmanBuffer = new byte[179];
 
+        /// <summary>
+        /// The options for the encoder.
+        /// </summary>
+        private readonly IJpegEncoderOptions options;
+
         /// <summary>
         /// The accumulated bits to write to the stream.
         /// </summary>
@@ -148,15 +153,22 @@ namespace ImageSharp.Formats
         /// </summary>
         private JpegSubsample subsample;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="JpegEncoderCore"/> class.
+        /// </summary>
+        /// <param name="options">The options for the encoder.</param>
+        public JpegEncoderCore(IJpegEncoderOptions options)
+        {
+            this.options = options ?? new JpegEncoderOptions();
+        }
+
         /// <summary>
         /// Encode writes the image to the jpeg baseline format with the given options.
         /// </summary>
         /// <typeparam name="TColor">The pixel format.</typeparam>
         /// <param name="image">The image to write from.</param>
         /// <param name="stream">The stream to write to.</param>
-        /// <param name="quality">The quality.</param>
-        /// <param name="sample">The subsampling mode.</param>
-        public void Encode<TColor>(Image<TColor> image, Stream stream, int quality, JpegSubsample sample)
+        public void Encode<TColor>(Image<TColor> image, Stream stream)
             where TColor : struct, IPixel<TColor>
         {
             Guard.NotNull(image, nameof(image));
@@ -168,18 +180,17 @@ namespace ImageSharp.Formats
                 throw new ImageFormatException($"Image is too large to encode at {image.Width}x{image.Height}.");
             }
 
-            this.outputStream = stream;
-            this.subsample = sample;
-
-            if (quality < 1)
+            // Ensure that quality can be set but has a fallback.
+            int quality = this.options.Quality > 0 ? this.options.Quality : image.MetaData.Quality;
+            if (quality == 0)
             {
-                quality = 1;
+                quality = 75;
             }
 
-            if (quality > 100)
-            {
-                quality = 100;
-            }
+            quality = quality.Clamp(1, 100);
+
+            this.outputStream = stream;
+            this.subsample = this.options.Subsample ?? (quality >= 91 ? JpegSubsample.Ratio444 : JpegSubsample.Ratio420);
 
             // Convert from a quality rating to a scaling factor.
             int scale;
@@ -706,6 +717,11 @@ namespace ImageSharp.Formats
         private void WriteProfiles<TColor>(Image<TColor> image)
             where TColor : struct, IPixel<TColor>
         {
+            if (this.options.IgnoreMetadata)
+            {
+                return;
+            }
+
             image.MetaData.SyncProfiles();
             this.WriteProfile(image.MetaData.ExifProfile);
         }

src/ImageSharp.Formats.Jpeg/JpegEncoderOptions.cs

@@ -0,0 +1,62 @@
+// <copyright file="JpegEncoderOptions.cs" company="James Jackson-South">
+// Copyright (c) James Jackson-South and contributors.
+// Licensed under the Apache License, Version 2.0.
+// </copyright>
+
+namespace ImageSharp.Formats
+{
+    /// <summary>
+    /// Encapsulates the options for the <see cref="JpegEncoder"/>.
+    /// </summary>
+    public sealed class JpegEncoderOptions : EncoderOptions, IJpegEncoderOptions
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="JpegEncoderOptions"/> class.
+        /// </summary>
+        public JpegEncoderOptions()
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="JpegEncoderOptions"/> class.
+        /// </summary>
+        /// <param name="options">The options for the encoder.</param>
+        private JpegEncoderOptions(IEncoderOptions options)
+            : base(options)
+        {
+        }
+
+        /// <summary>
+        /// Gets or sets the quality, that will be used to encode the image. Quality
+        /// index must be between 0 and 100 (compression from max to min).
+        /// </summary>
+        /// <remarks>
+        /// If the quality is less than or equal to 80, the subsampling ratio will switch to <see cref="JpegSubsample.Ratio420"/>
+        /// </remarks>
+        /// <value>The quality of the jpg image from 0 to 100.</value>
+        public int Quality { get; set; }
+
+        /// <summary>
+        /// Gets or sets the subsample ration, that will be used to encode the image.
+        /// </summary>
+        /// <value>The subsample ratio of the jpg image.</value>
+        public JpegSubsample? Subsample { get; set; }
+
+        /// <summary>
+        /// Converts the options to a <see cref="IJpegEncoderOptions"/> instance with a
+        /// cast or by creating a new instance with the specfied options.
+        /// </summary>
+        /// <param name="options">The options for the encoder.</param>
+        /// <returns>The options for the <see cref="JpegEncoder"/>.</returns>
+        internal static IJpegEncoderOptions Create(IEncoderOptions options)
+        {
+            IJpegEncoderOptions jpegOptions = options as IJpegEncoderOptions;
+            if (jpegOptions != null)
+            {
+                return jpegOptions;
+            }
+
+            return new JpegEncoderOptions(options);
+        }
+    }
+}

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

@@ -61,12 +61,13 @@ namespace ImageSharp.Tests
             byte[] data;
             using (Image<TColor> image = provider.GetImage())
             {
-                JpegEncoder encoder = new JpegEncoder() { Subsample = subsample, Quality = quality };
+                JpegEncoder encoder = new JpegEncoder();
+                JpegEncoderOptions options = new JpegEncoderOptions { Subsample = subsample, Quality = quality };
 
                 data = new byte[65536];
                 using (MemoryStream ms = new MemoryStream(data))
                 {
-                    image.Save(ms, encoder);
+                    image.Save(ms, encoder, options);
                 }
             }
 

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

@@ -38,11 +38,12 @@ namespace ImageSharp.Tests
             {
                 image.MetaData.Quality = quality;
                 image.MetaData.ExifProfile = null; // Reduce the size of the file
-                JpegEncoder encoder = new JpegEncoder { Subsample = subsample, Quality = quality };
+                JpegEncoder encoder = new JpegEncoder();
+                JpegEncoderOptions options = new JpegEncoderOptions { Subsample = subsample, Quality = quality };
 
                 provider.Utility.TestName += $"{subsample}_Q{quality}";
                 provider.Utility.SaveTestOutputFile(image, "png");
-                provider.Utility.SaveTestOutputFile(image, "jpg", encoder);
+                provider.Utility.SaveTestOutputFile(image, "jpg", encoder, options);
             }
         }
 
@@ -59,13 +60,63 @@ namespace ImageSharp.Tests
 
                 using (FileStream outputStream = File.OpenWrite(utility.GetTestOutputFileName("jpg")))
                 {
-                    JpegEncoder encoder = new JpegEncoder()
-                                              {
-                                                  Subsample = subSample,
-                                                  Quality = quality
-                                              };
+                    JpegEncoder encoder = new JpegEncoder();
 
-                    image.Save(outputStream, encoder);
+                    image.Save(outputStream, encoder, new JpegEncoderOptions()
+                    {
+                      Subsample = subSample,
+                      Quality = quality
+                    });
+                }
+            }
+        }
+
+        [Fact]
+        public void Encode_IgnoreMetadataIsFalse_ExifProfileIsWritten()
+        {
+            var options = new EncoderOptions()
+            {
+                IgnoreMetadata = false
+            };
+
+            TestFile testFile = TestFile.Create(TestImages.Jpeg.Baseline.Floorplan);
+
+            using (Image input = testFile.CreateImage())
+            {
+                using (MemoryStream memStream = new MemoryStream())
+                {
+                    input.Save(memStream, new JpegFormat(), options);
+
+                    memStream.Position = 0;
+                    using (Image output = new Image(memStream))
+                    {
+                        Assert.NotNull(output.MetaData.ExifProfile);
+                    }
+                }
+            }
+        }
+
+        [Fact]
+        public void Encode_IgnoreMetadataIsTrue_ExifProfileIgnored()
+        {
+            var options = new JpegEncoderOptions()
+            {
+                IgnoreMetadata = true
+            };
+
+            TestFile testFile = TestFile.Create(TestImages.Jpeg.Baseline.Floorplan);
+
+            using (Image input = testFile.CreateImage())
+            {
+                using (MemoryStream memStream = new MemoryStream())
+                {
+                    input.SaveAsJpeg(memStream, options);
+
+                    memStream.Position = 0;
+                    using (Image output = new Image(memStream))
+                    {
+                        Assert.Null(output.MetaData.ExifProfile);
+                    }
                 }
             }
         }

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

@@ -81,8 +81,9 @@ namespace ImageSharp.Tests
                     {
                         foreach (Image<Color> img in testImages)
                         {
-                            JpegEncoder encoder = new JpegEncoder() { Quality = quality, Subsample = subsample };
-                            img.Save(ms, encoder);
+                            JpegEncoder encoder = new JpegEncoder();
+                            JpegEncoderOptions options = new JpegEncoderOptions { Quality = quality, Subsample = subsample };
+                            img.Save(ms, encoder, options);
                             ms.Seek(0, SeekOrigin.Begin);
                         }
                     },

tests/ImageSharp.Tests/TestUtilities/ImagingTestCaseUtility.cs

@@ -75,7 +75,8 @@ namespace ImageSharp.Tests
         /// <param name="image">The image instance</param>
         /// <param name="extension">The requested extension</param>
         /// <param name="encoder">Optional encoder</param>
-        public void SaveTestOutputFile<TColor>(Image<TColor> image, string extension = null, IImageEncoder encoder = null)
+        /// <param name="options">Optional encoder options</param>
+        public void SaveTestOutputFile<TColor>(Image<TColor> image, string extension = null, IImageEncoder encoder = null, IEncoderOptions options = null)
             where TColor : struct, IPixel<TColor>
         {
             string path = this.GetTestOutputFileName(extension);
@@ -86,7 +87,7 @@ namespace ImageSharp.Tests
 
             using (var stream = File.OpenWrite(path))
             {
-                image.Save(stream, encoder);
+                image.Save(stream, encoder, options);
             }
         }