Changed optional arguments into overloads.

src/ImageSharp.Formats.Gif/ImageExtensions.cs

@@ -15,6 +15,22 @@ namespace ImageSharp
     /// </summary>
     public static partial class ImageExtensions
     {
+        /// <summary>
+        /// Saves the image to the given stream with the gif format.
+        /// </summary>
+        /// <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>
+        /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
+        /// <returns>
+        /// The <see cref="Image{TColor}"/>.
+        /// </returns>
+        public static Image<TColor> SaveAsGif<TColor>(this Image<TColor> source, Stream stream)
+            where TColor : struct, IPixel<TColor>
+        {
+            return SaveAsGif(source, stream, null);
+        }
+
         /// <summary>
         /// Saves the image to the given stream with the gif format.
         /// </summary>
@@ -26,7 +42,7 @@ namespace ImageSharp
         /// <returns>
         /// The <see cref="Image{TColor}"/>.
         /// </returns>
-        public static Image<TColor> SaveAsGif<TColor>(this Image<TColor> source, Stream stream, IGifEncoderOptions options = null)
+        public static Image<TColor> SaveAsGif<TColor>(this Image<TColor> source, Stream stream, IGifEncoderOptions options)
             where TColor : struct, IPixel<TColor>
         {
             GifEncoder encoder = new GifEncoder();

src/ImageSharp.Formats.Jpeg/ImageExtensions.cs

@@ -15,6 +15,22 @@ namespace ImageSharp
     /// </summary>
     public static partial class ImageExtensions
     {
+        /// <summary>
+        /// Saves the image to the given stream with the jpeg format.
+        /// </summary>
+        /// <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>
+        /// <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)
+            where TColor : struct, IPixel<TColor>
+        {
+            return SaveAsJpeg(source, stream, null);
+        }
+
         /// <summary>
         /// Saves the image to the given stream with the jpeg format.
         /// </summary>
@@ -26,7 +42,7 @@ namespace ImageSharp
         /// <returns>
         /// The <see cref="Image{TColor}"/>.
         /// </returns>
-        public static Image<TColor> SaveAsJpeg<TColor>(this Image<TColor> source, Stream stream, IJpegEncoderOptions options = null)
+        public static Image<TColor> SaveAsJpeg<TColor>(this Image<TColor> source, Stream stream, IJpegEncoderOptions options)
             where TColor : struct, IPixel<TColor>
         {
             JpegEncoder encoder = new JpegEncoder();

src/ImageSharp.Formats.Png/ImageExtensions.cs

@@ -14,6 +14,22 @@ namespace ImageSharp
     /// </summary>
     public static partial class ImageExtensions
     {
+        /// <summary>
+        /// Saves the image to the given stream with the png format.
+        /// </summary>
+        /// <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>
+        /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
+        /// <returns>
+        /// The <see cref="Image{TColor}"/>.
+        /// </returns>
+        public static Image<TColor> SaveAsPng<TColor>(this Image<TColor> source, Stream stream)
+            where TColor : struct, IPixel<TColor>
+        {
+            return SaveAsPng(source, stream, null);
+        }
+
         /// <summary>
         /// Saves the image to the given stream with the png format.
         /// </summary>
@@ -25,7 +41,7 @@ namespace ImageSharp
         /// <returns>
         /// The <see cref="Image{TColor}"/>.
         /// </returns>
-        public static Image<TColor> SaveAsPng<TColor>(this Image<TColor> source, Stream stream, IPngEncoderOptions options = null)
+        public static Image<TColor> SaveAsPng<TColor>(this Image<TColor> source, Stream stream, IPngEncoderOptions options)
             where TColor : struct, IPixel<TColor>
         {
             PngEncoder encoder = new PngEncoder();

src/ImageSharp/Image.cs

@@ -31,6 +31,48 @@ namespace ImageSharp
         {
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image"/> class.
+        /// </summary>
+        /// <param name="stream">
+        /// The stream containing image information.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="stream"/> is null.</exception>
+        public Image(Stream stream)
+            : base(stream, null, null)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image"/> class.
+        /// </summary>
+        /// <param name="stream">
+        /// The stream containing image information.
+        /// </param>
+        /// <param name="options">
+        /// The options for the decoder.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="stream"/> is null.</exception>
+        public Image(Stream stream, IDecoderOptions options)
+            : base(stream, options, null)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image"/> class.
+        /// </summary>
+        /// <param name="stream">
+        /// The stream containing image information.
+        /// </param>
+        /// <param name="configuration">
+        /// The configuration providing initialization code which allows extending the library.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="stream"/> is null.</exception>
+        public Image(Stream stream, Configuration configuration)
+            : base(stream, null, configuration)
+        {
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="Image"/> class.
         /// </summary>
@@ -44,12 +86,54 @@ namespace ImageSharp
         /// The configuration providing initialization code which allows extending the library.
         /// </param>
         /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="stream"/> is null.</exception>
-        public Image(Stream stream, IDecoderOptions options = null, Configuration configuration = null)
+        public Image(Stream stream, IDecoderOptions options, Configuration configuration)
             : base(stream, options, configuration)
         {
         }
 
 #if !NETSTANDARD1_1
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image"/> class.
+        /// </summary>
+        /// <param name="filePath">
+        /// A file path to read image information.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="filePath"/> is null.</exception>
+        public Image(string filePath)
+            : base(filePath, null, null)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image"/> class.
+        /// </summary>
+        /// <param name="filePath">
+        /// A file path to read image information.
+        /// </param>
+        /// <param name="options">
+        /// The options for the decoder.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="filePath"/> is null.</exception>
+        public Image(string filePath, IDecoderOptions options)
+            : base(filePath, options, null)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image"/> class.
+        /// </summary>
+        /// <param name="filePath">
+        /// A file path to read image information.
+        /// </param>
+        /// <param name="configuration">
+        /// The configuration providing initialization code which allows extending the library.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="filePath"/> is null.</exception>
+        public Image(string filePath, Configuration configuration)
+            : base(filePath, null, configuration)
+        {
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="Image"/> class.
         /// </summary>
@@ -63,12 +147,54 @@ namespace ImageSharp
         /// The configuration providing initialization code which allows extending the library.
         /// </param>
         /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="filePath"/> is null.</exception>
-        public Image(string filePath, IDecoderOptions options = null, Configuration configuration = null)
+        public Image(string filePath, IDecoderOptions options, Configuration configuration)
             : base(filePath, options, configuration)
         {
         }
 #endif
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image"/> class.
+        /// </summary>
+        /// <param name="bytes">
+        /// The byte array containing image information.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="bytes"/> is null.</exception>
+        public Image(byte[] bytes)
+           : base(bytes, null, null)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image"/> class.
+        /// </summary>
+        /// <param name="bytes">
+        /// The byte array containing image information.
+        /// </param>
+        /// <param name="options">
+        /// The options for the decoder.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="bytes"/> is null.</exception>
+        public Image(byte[] bytes, IDecoderOptions options)
+           : base(bytes, options, null)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image"/> class.
+        /// </summary>
+        /// <param name="bytes">
+        /// The byte array containing image information.
+        /// </param>
+        /// <param name="configuration">
+        /// The configuration providing initialization code which allows extending the library.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="bytes"/> is null.</exception>
+        public Image(byte[] bytes, Configuration configuration)
+           : base(bytes, null, configuration)
+        {
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="Image"/> class.
         /// </summary>
@@ -82,7 +208,7 @@ namespace ImageSharp
         /// The configuration providing initialization code which allows extending the library.
         /// </param>
         /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="bytes"/> is null.</exception>
-        public Image(byte[] bytes, IDecoderOptions options = null, Configuration configuration = null)
+        public Image(byte[] bytes, IDecoderOptions options, Configuration configuration)
            : base(bytes, options, configuration)
         {
         }

src/ImageSharp/Image/Image{TColor}.cs

@@ -46,6 +46,48 @@ namespace ImageSharp
             this.CurrentImageFormat = this.Configuration.ImageFormats.First();
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image{TColor}"/> class.
+        /// </summary>
+        /// <param name="stream">
+        /// The stream containing image information.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="stream"/> is null.</exception>
+        public Image(Stream stream)
+            : this(stream, null, null)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image{TColor}"/> class.
+        /// </summary>
+        /// <param name="stream">
+        /// The stream containing image information.
+        /// </param>
+        /// <param name="options">
+        /// The options for the decoder.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="stream"/> is null.</exception>
+        public Image(Stream stream, IDecoderOptions options)
+            : this(stream, options, null)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image{TColor}"/> class.
+        /// </summary>
+        /// <param name="stream">
+        /// The stream containing image information.
+        /// </param>
+        /// <param name="configuration">
+        /// The configuration providing initialization code which allows extending the library.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="stream"/> is null.</exception>
+        public Image(Stream stream, Configuration configuration)
+            : this(stream, null, configuration)
+        {
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="Image{TColor}"/> class.
         /// </summary>
@@ -59,7 +101,7 @@ namespace ImageSharp
         /// The configuration providing initialization code which allows extending the library.
         /// </param>
         /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="stream"/> is null.</exception>
-        public Image(Stream stream, IDecoderOptions options = null, Configuration configuration = null)
+        public Image(Stream stream, IDecoderOptions options, Configuration configuration)
             : base(configuration)
         {
             Guard.NotNull(stream, nameof(stream));
@@ -67,6 +109,48 @@ namespace ImageSharp
         }
 
 #if !NETSTANDARD1_1
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image{TColor}"/> class.
+        /// </summary>
+        /// <param name="filePath">
+        /// The file containing image information.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="filePath"/> is null.</exception>
+        public Image(string filePath)
+            : this(filePath, null, null)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image{TColor}"/> class.
+        /// </summary>
+        /// <param name="filePath">
+        /// The file containing image information.
+        /// </param>
+        /// <param name="options">
+        /// The options for the decoder.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="filePath"/> is null.</exception>
+        public Image(string filePath, IDecoderOptions options)
+            : this(filePath, options, null)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image{TColor}"/> class.
+        /// </summary>
+        /// <param name="filePath">
+        /// The file containing image information.
+        /// </param>
+        /// <param name="configuration">
+        /// The configuration providing initialization code which allows extending the library.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="filePath"/> is null.</exception>
+        public Image(string filePath, Configuration configuration)
+            : this(filePath, null, configuration)
+        {
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="Image{TColor}"/> class.
         /// </summary>
@@ -80,7 +164,7 @@ namespace ImageSharp
         /// The configuration providing initialization code which allows extending the library.
         /// </param>
         /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="filePath"/> is null.</exception>
-        public Image(string filePath, IDecoderOptions options = null, Configuration configuration = null)
+        public Image(string filePath, IDecoderOptions options, Configuration configuration)
             : base(configuration)
         {
             Guard.NotNull(filePath, nameof(filePath));
@@ -91,6 +175,48 @@ namespace ImageSharp
         }
 #endif
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image{TColor}"/> class.
+        /// </summary>
+        /// <param name="bytes">
+        /// The byte array containing image information.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="bytes"/> is null.</exception>
+        public Image(byte[] bytes)
+            : this(bytes, null, null)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image{TColor}"/> class.
+        /// </summary>
+        /// <param name="bytes">
+        /// The byte array containing image information.
+        /// </param>
+        /// <param name="options">
+        /// The options for the decoder.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="bytes"/> is null.</exception>
+        public Image(byte[] bytes, IDecoderOptions options)
+            : this(bytes, options, null)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image{TColor}"/> class.
+        /// </summary>
+        /// <param name="bytes">
+        /// The byte array containing image information.
+        /// </param>
+        /// <param name="configuration">
+        /// The configuration providing initialization code which allows extending the library.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="bytes"/> is null.</exception>
+        public Image(byte[] bytes, Configuration configuration)
+            : this(bytes, null, configuration)
+        {
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="Image{TColor}"/> class.
         /// </summary>
@@ -104,7 +230,7 @@ namespace ImageSharp
         /// The configuration providing initialization code which allows extending the library.
         /// </param>
         /// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="bytes"/> is null.</exception>
-        public Image(byte[] bytes, IDecoderOptions options = null, Configuration configuration = null)
+        public Image(byte[] bytes, IDecoderOptions options, Configuration configuration)
             : base(configuration)
         {
             Guard.NotNull(bytes, nameof(bytes));
@@ -202,6 +328,17 @@ namespace ImageSharp
             }
         }
 
+        /// <summary>
+        /// Saves the image to the given stream using the currently loaded image format.
+        /// </summary>
+        /// <param name="stream">The stream to save the image to.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
+        /// <returns>The <see cref="Image{TColor}"/></returns>
+        public Image<TColor> Save(Stream stream)
+        {
+            return this.Save(stream, (IEncoderOptions)null);
+        }
+
         /// <summary>
         /// Saves the image to the given stream using the currently loaded image format.
         /// </summary>
@@ -209,13 +346,24 @@ namespace ImageSharp
         /// <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 Image<TColor> Save(Stream stream, IEncoderOptions options = null)
+        public Image<TColor> Save(Stream stream, IEncoderOptions options)
         {
             Guard.NotNull(stream, nameof(stream));
             this.CurrentImageFormat.Encoder.Encode(this, stream, options);
             return this;
         }
 
+        /// <summary>
+        /// Saves the image to the given stream using the given image format.
+        /// </summary>
+        /// <param name="stream">The stream to save the image to.</param>
+        /// <param name="format">The format to save the image as.</param>
+        /// <returns>The <see cref="Image{TColor}"/></returns>
+        public Image<TColor> Save(Stream stream, IImageFormat format)
+        {
+            return this.Save(stream, format, null);
+        }
+
         /// <summary>
         /// Saves the image to the given stream using the given image format.
         /// </summary>
@@ -223,7 +371,7 @@ namespace ImageSharp
         /// <param name="format">The format to save the image as.</param>
         /// <param name="options">The options for the encoder.</param>
         /// <returns>The <see cref="Image{TColor}"/></returns>
-        public Image<TColor> Save(Stream stream, IImageFormat format, IEncoderOptions options = null)
+        public Image<TColor> Save(Stream stream, IImageFormat format, IEncoderOptions options)
         {
             Guard.NotNull(stream, nameof(stream));
             Guard.NotNull(format, nameof(format));
@@ -231,6 +379,20 @@ namespace ImageSharp
             return this;
         }
 
+        /// <summary>
+        /// Saves the image to the given stream using the given image encoder.
+        /// </summary>
+        /// <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 or encoder is null.</exception>
+        /// <returns>
+        /// The <see cref="Image{TColor}"/>.
+        /// </returns>
+        public Image<TColor> Save(Stream stream, IImageEncoder encoder)
+        {
+            return this.Save(stream, encoder, null);
+        }
+
         /// <summary>
         /// Saves the image to the given stream using the given image encoder.
         /// </summary>
@@ -241,7 +403,7 @@ namespace ImageSharp
         /// <returns>
         /// The <see cref="Image{TColor}"/>.
         /// </returns>
-        public Image<TColor> Save(Stream stream, IImageEncoder encoder, IEncoderOptions options = null)
+        public Image<TColor> Save(Stream stream, IImageEncoder encoder, IEncoderOptions options)
         {
             Guard.NotNull(stream, nameof(stream));
             Guard.NotNull(encoder, nameof(encoder));
@@ -257,6 +419,17 @@ namespace ImageSharp
         }
 
 #if !NETSTANDARD1_1
+        /// <summary>
+        /// Saves the image to the given stream using the currently loaded image format.
+        /// </summary>
+        /// <param name="filePath">The file path to save the image to.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
+        /// <returns>The <see cref="Image{TColor}"/></returns>
+        public Image<TColor> Save(string filePath)
+        {
+            return this.Save(filePath, (IEncoderOptions)null);
+        }
+
         /// <summary>
         /// Saves the image to the given stream using the currently loaded image format.
         /// </summary>
@@ -264,7 +437,7 @@ namespace ImageSharp
         /// <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 Image<TColor> Save(string filePath, IEncoderOptions options = null)
+        public Image<TColor> Save(string filePath, IEncoderOptions options)
         {
             string ext = Path.GetExtension(filePath).Trim('.');
             IImageFormat format = this.Configuration.ImageFormats.SingleOrDefault(f => f.SupportedExtensions.Contains(ext, StringComparer.OrdinalIgnoreCase));
@@ -276,6 +449,18 @@ namespace ImageSharp
             return this.Save(filePath, format);
         }
 
+        /// <summary>
+        /// Saves the image to the given stream using the currently loaded image format.
+        /// </summary>
+        /// <param name="filePath">The file path to save the image to.</param>
+        /// <param name="format">The format to save the image as.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the format is null.</exception>
+        /// <returns>The <see cref="Image{TColor}"/></returns>
+        public Image<TColor> Save(string filePath, IImageFormat format)
+        {
+            return this.Save(filePath, format, null);
+        }
+
         /// <summary>
         /// Saves the image to the given stream using the currently loaded image format.
         /// </summary>
@@ -284,7 +469,7 @@ namespace ImageSharp
         /// <param name="options">The options for the encoder.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the format is null.</exception>
         /// <returns>The <see cref="Image{TColor}"/></returns>
-        public Image<TColor> Save(string filePath, IImageFormat format, IEncoderOptions options = null)
+        public Image<TColor> Save(string filePath, IImageFormat format, IEncoderOptions options)
         {
             Guard.NotNull(format, nameof(format));
             using (FileStream fs = File.Create(filePath))
@@ -293,6 +478,18 @@ namespace ImageSharp
             }
         }
 
+        /// <summary>
+        /// Saves the image to the given stream using the currently loaded image format.
+        /// </summary>
+        /// <param name="filePath">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 encoder is null.</exception>
+        /// <returns>The <see cref="Image{TColor}"/></returns>
+        public Image<TColor> Save(string filePath, IImageEncoder encoder)
+        {
+            return this.Save(filePath, encoder, null);
+        }
+
         /// <summary>
         /// Saves the image to the given stream using the currently loaded image format.
         /// </summary>
@@ -301,7 +498,7 @@ namespace ImageSharp
         /// <param name="options">The options for the encoder.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the encoder is null.</exception>
         /// <returns>The <see cref="Image{TColor}"/></returns>
-        public Image<TColor> Save(string filePath, IImageEncoder encoder, IEncoderOptions options = null)
+        public Image<TColor> Save(string filePath, IImageEncoder encoder, IEncoderOptions options)
         {
             Guard.NotNull(encoder, nameof(encoder));
             using (FileStream fs = File.Create(filePath))

tests/ImageSharp.Tests/Image/ImageTests.cs

@@ -59,7 +59,7 @@ namespace ImageSharp.Tests
             ArgumentNullException ex = Assert.Throws<ArgumentNullException>(
                 () =>
                 {
-                    new Image(null);
+                    new Image((string) null);
                 });
         }