global property store on configuration on processing context

src/ImageSharp/Configuration.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Net.Http;
 using SixLabors.ImageSharp.Formats;
 using SixLabors.ImageSharp.Formats.Bmp;
 using SixLabors.ImageSharp.Formats.Gif;
@@ -27,6 +28,8 @@ namespace SixLabors.ImageSharp
 
         private int maxDegreeOfParallelism = Environment.ProcessorCount;
 
+        private Dictionary<object, object> properties = new Dictionary<object, object>();
+
         /// <summary>
         /// Initializes a new instance of the <see cref="Configuration" /> class.
         /// </summary>
@@ -73,6 +76,12 @@ namespace SixLabors.ImageSharp
             }
         }
 
+        /// <summary>
+        /// Gets a set of properties for the Congiguration.
+        /// </summary>
+        /// <remarks>This can be used for storing global settings and defaults to be accessable to processors.</remarks>
+        public IDictionary<object, object> Properties => this.properties;
+
         /// <summary>
         /// Gets the currently registered <see cref="IImageFormat"/>s.
         /// </summary>

src/ImageSharp/GraphicOptionsDefaultsExtensions.cs

@@ -0,0 +1,67 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.Processing;
+
+namespace SixLabors.ImageSharp
+{
+    /// <summary>
+    /// Adds extensions that allow the processing of images to the <see cref="Image{TPixel}"/> type.
+    /// </summary>
+    public static class GraphicOptionsDefaultsExtensions
+    {
+        /// <summary>
+        /// Sets the default options against the image processing context.
+        /// </summary>
+        /// <param name="context">The image processing context to store default against.</param>
+        /// <param name="options">The default options to use.</param>
+        public static void SetDefaultOptions(this IImageProcessingContext context, GraphicsOptions options)
+        {
+            context.Properties[typeof(GraphicsOptions)] = options;
+        }
+
+        /// <summary>
+        /// Sets the default options against the configuration.
+        /// </summary>
+        /// <param name="context">The image processing context to store default against.</param>
+        /// <param name="options">The default options to use.</param>
+        public static void SetDefaultOptions(this Configuration context, GraphicsOptions options)
+        {
+            context.Properties[typeof(GraphicsOptions)] = options;
+        }
+
+        /// <summary>
+        /// Gets the default options against the image processing context.
+        /// </summary>
+        /// <param name="context">The image processing context to retrieve defaults from.</param>
+        /// <returns>The globaly configued default options.</returns>
+        public static GraphicsOptions GetDefaultGraphicsOptions(this IImageProcessingContext context)
+        {
+            if (context.Properties.TryGetValue(typeof(GraphicsOptions), out var options) && options is GraphicsOptions go)
+            {
+                return go;
+            }
+
+            var configOptions = context.Configuration.GetDefaultGraphicsOptions();
+            context.Properties[typeof(GraphicsOptions)] = configOptions;
+            return configOptions;
+        }
+
+        /// <summary>
+        /// Gets the default options against the image processing context.
+        /// </summary>
+        /// <param name="context">The image processing context to retrieve defaults from.</param>
+        /// <returns>The globaly configued default options.</returns>
+        public static GraphicsOptions GetDefaultGraphicsOptions(this Configuration context)
+        {
+            if (context.Properties.TryGetValue(typeof(GraphicsOptions), out var options) && options is GraphicsOptions go)
+            {
+                return go;
+            }
+
+            var configOptions = new GraphicsOptions();
+            context.Properties[typeof(GraphicsOptions)] = configOptions;
+            return configOptions;
+        }
+    }
+}

src/ImageSharp/Processing/DefaultImageProcessorContext{TPixel}.cs

@@ -1,6 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System.Collections.Generic;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors;
 
@@ -15,6 +16,7 @@ namespace SixLabors.ImageSharp.Processing
     {
         private readonly bool mutate;
         private readonly Image<TPixel> source;
+        private readonly Dictionary<object, object> properties = new Dictionary<object, object>();
         private Image<TPixel> destination;
 
         /// <summary>
@@ -39,6 +41,9 @@ namespace SixLabors.ImageSharp.Processing
         /// <inheritdoc/>
         public Configuration Configuration { get; }
 
+        /// <inheritdoc/>
+        public IDictionary<object, object> Properties => this.properties;
+
         /// <inheritdoc/>
         public Image<TPixel> GetResultImage()
         {

src/ImageSharp/Processing/Extensions/Drawing/DrawImageExtensions.cs

@@ -23,7 +23,7 @@ namespace SixLabors.ImageSharp.Processing
             Image image,
             float opacity)
         {
-            var options = new GraphicsOptions();
+            var options = source.GetDefaultGraphicsOptions();
             return source.ApplyProcessor(
                 new DrawImageProcessor(
                 image,
@@ -51,7 +51,7 @@ namespace SixLabors.ImageSharp.Processing
                     image,
                     Point.Empty,
                     colorBlending,
-                    new GraphicsOptions().AlphaCompositionMode,
+                    source.GetDefaultGraphicsOptions().AlphaCompositionMode,
                     opacity));
 
         /// <summary>
@@ -104,7 +104,7 @@ namespace SixLabors.ImageSharp.Processing
             Point location,
             float opacity)
         {
-            var options = new GraphicsOptions();
+            var options = source.GetDefaultGraphicsOptions();
             return source.ApplyProcessor(
                 new DrawImageProcessor(
                 image,
@@ -134,7 +134,7 @@ namespace SixLabors.ImageSharp.Processing
                     image,
                     location,
                     colorBlending,
-                    new GraphicsOptions().AlphaCompositionMode,
+                    source.GetDefaultGraphicsOptions().AlphaCompositionMode,
                     opacity));
 
         /// <summary>

src/ImageSharp/Processing/Extensions/Filters/LomographExtensions.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.Processing.Processors.Filters;
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Lomograph(this IImageProcessingContext source)
-            => source.ApplyProcessor(new LomographProcessor());
+            => source.ApplyProcessor(new LomographProcessor(source.GetDefaultGraphicsOptions()));
 
         /// <summary>
         /// Alters the colors of the image recreating an old Lomograph camera effect.
@@ -28,6 +28,6 @@ namespace SixLabors.ImageSharp.Processing
         /// </param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Lomograph(this IImageProcessingContext source, Rectangle rectangle)
-            => source.ApplyProcessor(new LomographProcessor(), rectangle);
+            => source.ApplyProcessor(new LomographProcessor(source.GetDefaultGraphicsOptions()), rectangle);
     }
-}
+}

src/ImageSharp/Processing/Extensions/Filters/PolaroidExtensions.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.Processing.Processors.Filters;
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Polaroid(this IImageProcessingContext source)
-            => source.ApplyProcessor(new PolaroidProcessor());
+            => source.ApplyProcessor(new PolaroidProcessor(source.GetDefaultGraphicsOptions()));
 
         /// <summary>
         /// Alters the colors of the image recreating an old Polaroid camera effect.
@@ -28,6 +28,6 @@ namespace SixLabors.ImageSharp.Processing
         /// </param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Polaroid(this IImageProcessingContext source, Rectangle rectangle)
-            => source.ApplyProcessor(new PolaroidProcessor(), rectangle);
+            => source.ApplyProcessor(new PolaroidProcessor(source.GetDefaultGraphicsOptions()), rectangle);
     }
 }

src/ImageSharp/Processing/Extensions/Overlays/BackgroundColorExtensions.cs

@@ -18,7 +18,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="color">The color to set as the background.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext BackgroundColor(this IImageProcessingContext source, Color color) =>
-            BackgroundColor(source, new GraphicsOptions(), color);
+            BackgroundColor(source, source.GetDefaultGraphicsOptions(), color);
 
         /// <summary>
         /// Replaces the background color of image with the given one.
@@ -33,7 +33,7 @@ namespace SixLabors.ImageSharp.Processing
             this IImageProcessingContext source,
             Color color,
             Rectangle rectangle) =>
-            BackgroundColor(source, new GraphicsOptions(), color, rectangle);
+            BackgroundColor(source, source.GetDefaultGraphicsOptions(), color, rectangle);
 
         /// <summary>
         /// Replaces the background color of image with the given one.

src/ImageSharp/Processing/Extensions/Overlays/GlowExtensions.cs

@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Glow(this IImageProcessingContext source) =>
-            Glow(source, new GraphicsOptions());
+            Glow(source, source.GetDefaultGraphicsOptions());
 
         /// <summary>
         /// Applies a radial glow effect to an image.
@@ -27,7 +27,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Glow(this IImageProcessingContext source, Color color)
         {
-            return Glow(source, new GraphicsOptions(), color);
+            return Glow(source, source.GetDefaultGraphicsOptions(), color);
         }
 
         /// <summary>
@@ -37,7 +37,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="radius">The the radius.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Glow(this IImageProcessingContext source, float radius) =>
-            Glow(source, new GraphicsOptions(), radius);
+            Glow(source, source.GetDefaultGraphicsOptions(), radius);
 
         /// <summary>
         /// Applies a radial glow effect to an image.
@@ -48,7 +48,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Glow(this IImageProcessingContext source, Rectangle rectangle) =>
-            source.Glow(new GraphicsOptions(), rectangle);
+            source.Glow(source.GetDefaultGraphicsOptions(), rectangle);
 
         /// <summary>
         /// Applies a radial glow effect to an image.
@@ -65,7 +65,7 @@ namespace SixLabors.ImageSharp.Processing
             Color color,
             float radius,
             Rectangle rectangle) =>
-            source.Glow(new GraphicsOptions(), color, ValueSize.Absolute(radius), rectangle);
+            source.Glow(source.GetDefaultGraphicsOptions(), color, ValueSize.Absolute(radius), rectangle);
 
         /// <summary>
         /// Applies a radial glow effect to an image.

src/ImageSharp/Processing/Extensions/Overlays/VignetteExtensions.cs

@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Vignette(this IImageProcessingContext source) =>
-            Vignette(source, new GraphicsOptions());
+            Vignette(source, source.GetDefaultGraphicsOptions());
 
         /// <summary>
         /// Applies a radial vignette effect to an image.
@@ -26,7 +26,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="color">The color to set as the vignette.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Vignette(this IImageProcessingContext source, Color color) =>
-            Vignette(source, new GraphicsOptions(), color);
+            Vignette(source, source.GetDefaultGraphicsOptions(), color);
 
         /// <summary>
         /// Applies a radial vignette effect to an image.
@@ -39,7 +39,7 @@ namespace SixLabors.ImageSharp.Processing
             this IImageProcessingContext source,
             float radiusX,
             float radiusY) =>
-            Vignette(source, new GraphicsOptions(), radiusX, radiusY);
+            Vignette(source, source.GetDefaultGraphicsOptions(), radiusX, radiusY);
 
         /// <summary>
         /// Applies a radial vignette effect to an image.
@@ -50,7 +50,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Vignette(this IImageProcessingContext source, Rectangle rectangle) =>
-            Vignette(source, new GraphicsOptions(), rectangle);
+            Vignette(source, source.GetDefaultGraphicsOptions(), rectangle);
 
         /// <summary>
         /// Applies a radial vignette effect to an image.
@@ -69,7 +69,7 @@ namespace SixLabors.ImageSharp.Processing
             float radiusX,
             float radiusY,
             Rectangle rectangle) =>
-            source.Vignette(new GraphicsOptions(), color, radiusX, radiusY, rectangle);
+            source.Vignette(source.GetDefaultGraphicsOptions(), color, radiusX, radiusY, rectangle);
 
         /// <summary>
         /// Applies a radial vignette effect to an image.

src/ImageSharp/Processing/IImageProcessingContext.cs

@@ -1,6 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System.Collections.Generic;
 using SixLabors.ImageSharp.Processing.Processors;
 
 namespace SixLabors.ImageSharp.Processing
@@ -15,6 +16,12 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         Configuration Configuration { get; }
 
+        /// <summary>
+        /// Gets a set of properties for the Image Processing Context.
+        /// </summary>
+        /// <remarks>This can be used for storing global settings and defaults to be accessable to processors.</remarks>
+        IDictionary<object, object> Properties { get; }
+
         /// <summary>
         /// Gets the image dimensions at the current point in the processing pipeline.
         /// </summary>

src/ImageSharp/Processing/Processors/Filters/LomographProcessor.cs

@@ -11,11 +11,18 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         /// <summary>
         /// Initializes a new instance of the <see cref="LomographProcessor" /> class.
         /// </summary>
-        public LomographProcessor()
+        /// <param name="graphicsOptions">Graphics options to use within the processor.</param>
+        public LomographProcessor(GraphicsOptions graphicsOptions)
             : base(KnownFilterMatrices.LomographFilter)
         {
+            this.GraphicsOptions = graphicsOptions;
         }
 
+        /// <summary>
+        /// Gets the options effecting blending and composition
+        /// </summary>
+        public GraphicsOptions GraphicsOptions { get; }
+
         /// <inheritdoc />
         public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>(Configuration configuration, Image<TPixel> source, Rectangle sourceRectangle) =>
             new LomographProcessor<TPixel>(configuration, this, source, sourceRectangle);

src/ImageSharp/Processing/Processors/Filters/LomographProcessor{TPixel}.cs

@@ -13,6 +13,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         where TPixel : unmanaged, IPixel<TPixel>
     {
         private static readonly Color VeryDarkGreen = Color.FromRgba(0, 10, 0, 255);
+        private readonly LomographProcessor definition;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="LomographProcessor{TPixel}"/> class.
@@ -24,12 +25,13 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         public LomographProcessor(Configuration configuration, LomographProcessor definition, Image<TPixel> source, Rectangle sourceRectangle)
             : base(configuration, definition, source, sourceRectangle)
         {
+            this.definition = definition;
         }
 
         /// <inheritdoc/>
         protected override void AfterImageApply()
         {
-            new VignetteProcessor(VeryDarkGreen).Execute(this.Configuration, this.Source, this.SourceRectangle);
+            new VignetteProcessor(this.definition.GraphicsOptions, VeryDarkGreen).Execute(this.Configuration, this.Source, this.SourceRectangle);
             base.AfterImageApply();
         }
     }

src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor.cs

@@ -11,11 +11,18 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         /// <summary>
         /// Initializes a new instance of the <see cref="PolaroidProcessor" /> class.
         /// </summary>
-        public PolaroidProcessor()
+        /// <param name="graphicsOptions">Graphics options to use within the processor.</param>
+        public PolaroidProcessor(GraphicsOptions graphicsOptions)
             : base(KnownFilterMatrices.PolaroidFilter)
         {
+            this.GraphicsOptions = graphicsOptions;
         }
 
+        /// <summary>
+        /// Gets the options effecting blending and composition
+        /// </summary>
+        public GraphicsOptions GraphicsOptions { get; }
+
         /// <inheritdoc />
         public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>(Configuration configuration, Image<TPixel> source, Rectangle sourceRectangle) =>
             new PolaroidProcessor<TPixel>(configuration, this, source, sourceRectangle);

src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor{TPixel}.cs

@@ -14,6 +14,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     {
         private static readonly Color LightOrange = Color.FromRgba(255, 153, 102, 128);
         private static readonly Color VeryDarkOrange = Color.FromRgb(102, 34, 0);
+        private readonly PolaroidProcessor definition;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="PolaroidProcessor{TPixel}"/> class.
@@ -25,13 +26,14 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         public PolaroidProcessor(Configuration configuration, PolaroidProcessor definition, Image<TPixel> source, Rectangle sourceRectangle)
             : base(configuration, definition, source, sourceRectangle)
         {
+            this.definition = definition;
         }
 
         /// <inheritdoc/>
         protected override void AfterImageApply()
         {
-            new VignetteProcessor(VeryDarkOrange).Execute(this.Configuration, this.Source, this.SourceRectangle);
-            new GlowProcessor(LightOrange, this.Source.Width / 4F).Execute(this.Configuration, this.Source, this.SourceRectangle);
+            new VignetteProcessor(this.definition.GraphicsOptions, VeryDarkOrange).Execute(this.Configuration, this.Source, this.SourceRectangle);
+            new GlowProcessor(this.definition.GraphicsOptions, LightOrange, this.Source.Width / 4F).Execute(this.Configuration, this.Source, this.SourceRectangle);
             base.AfterImageApply();
         }
     }

src/ImageSharp/Processing/Processors/Overlays/GlowProcessor.cs

@@ -10,15 +10,6 @@ namespace SixLabors.ImageSharp.Processing.Processors.Overlays
     /// </summary>
     public sealed class GlowProcessor : IImageProcessor
     {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="GlowProcessor" /> class.
-        /// </summary>
-        /// <param name="color">The color or the glow.</param>
-        public GlowProcessor(Color color)
-            : this(color, 0)
-        {
-        }
-
         /// <summary>
         /// Initializes a new instance of the <see cref="GlowProcessor" /> class.
         /// </summary>
@@ -29,16 +20,6 @@ namespace SixLabors.ImageSharp.Processing.Processors.Overlays
         {
         }
 
-        /// <summary>
-        /// Initializes a new instance of the <see cref="GlowProcessor" /> class.
-        /// </summary>
-        /// <param name="color">The color or the glow.</param>
-        /// <param name="radius">The radius of the glow.</param>
-        internal GlowProcessor(Color color, ValueSize radius)
-            : this(new GraphicsOptions(), color, radius)
-        {
-        }
-
         /// <summary>
         /// Initializes a new instance of the <see cref="GlowProcessor" /> class.
         /// </summary>

src/ImageSharp/Processing/Processors/Overlays/VignetteProcessor.cs

@@ -10,15 +10,6 @@ namespace SixLabors.ImageSharp.Processing.Processors.Overlays
     /// </summary>
     public sealed class VignetteProcessor : IImageProcessor
     {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="VignetteProcessor" /> class.
-        /// </summary>
-        /// <param name="color">The color of the vignette.</param>
-        public VignetteProcessor(Color color)
-            : this(new GraphicsOptions(), color)
-        {
-        }
-
         /// <summary>
         /// Initializes a new instance of the <see cref="VignetteProcessor" /> class.
         /// </summary>

tests/ImageSharp.Tests/Processing/FakeImageOperationsProvider.cs

@@ -56,6 +56,8 @@ namespace SixLabors.ImageSharp.Tests.Processing
 
             public Configuration Configuration { get; }
 
+            public IDictionary<object, object> Properties { get; } = new Dictionary<object, object>();
+
             public Image<TPixel> GetResultImage()
             {
                 return this.Source;