From 5be8f17eb1e62b6845d992813054b60fab5db458 Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Sat, 1 Apr 2017 19:06:01 +0200
Subject: [PATCH] Make all mutable brushes implement IMutableBrush.

---
 src/Avalonia.Visuals/Media/ImageBrush.cs          | 12 +++++++++---
 src/Avalonia.Visuals/Media/LinearGradientBrush.cs |  8 +++++++-
 src/Avalonia.Visuals/Media/RadialGradientBrush.cs |  8 +++++++-
 src/Avalonia.Visuals/Media/VisualBrush.cs         |  8 +++++++-
 4 files changed, 30 insertions(+), 6 deletions(-)

diff --git a/src/Avalonia.Visuals/Media/ImageBrush.cs b/src/Avalonia.Visuals/Media/ImageBrush.cs
index 85c1f6c71a..69b98fd35c 100644
--- a/src/Avalonia.Visuals/Media/ImageBrush.cs
+++ b/src/Avalonia.Visuals/Media/ImageBrush.cs
@@ -8,7 +8,7 @@ namespace Avalonia.Media
     /// <summary>
     /// Paints an area with an <see cref="IBitmap"/>.
     /// </summary>
-    public class ImageBrush : TileBrush, IImageBrush
+    public class ImageBrush : TileBrush, IImageBrush, IMutableBrush
     {
         /// <summary>
         /// Defines the <see cref="Visual"/> property.
@@ -17,14 +17,14 @@ namespace Avalonia.Media
             AvaloniaProperty.Register<ImageBrush, IBitmap>("Source");
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="VisualBrush"/> class.
+        /// Initializes a new instance of the <see cref="ImageBrush"/> class.
         /// </summary>
         public ImageBrush()
         {
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="VisualBrush"/> class.
+        /// Initializes a new instance of the <see cref="ImageBrush"/> class.
         /// </summary>
         /// <param name="source">The image to draw.</param>
         public ImageBrush(IBitmap source)
@@ -40,5 +40,11 @@ namespace Avalonia.Media
             get { return GetValue(SourceProperty); }
             set { SetValue(SourceProperty, value); }
         }
+
+        /// <inheritdoc/>
+        IBrush IMutableBrush.ToImmutable()
+        {
+            return new Immutable.ImmutableImageBrush(this);
+        }
     }
 }
diff --git a/src/Avalonia.Visuals/Media/LinearGradientBrush.cs b/src/Avalonia.Visuals/Media/LinearGradientBrush.cs
index 33eea4fbad..6c0d500343 100644
--- a/src/Avalonia.Visuals/Media/LinearGradientBrush.cs
+++ b/src/Avalonia.Visuals/Media/LinearGradientBrush.cs
@@ -6,7 +6,7 @@ namespace Avalonia.Media
     /// <summary>
     /// A brush that draws with a linear gradient.
     /// </summary>
-    public sealed class LinearGradientBrush : GradientBrush, ILinearGradientBrush
+    public sealed class LinearGradientBrush : GradientBrush, ILinearGradientBrush, IMutableBrush
     {
         /// <summary>
         /// Defines the <see cref="StartPoint"/> property.
@@ -41,5 +41,11 @@ namespace Avalonia.Media
             get { return GetValue(EndPointProperty); }
             set { SetValue(EndPointProperty, value); }
         }
+
+        /// <inheritdoc/>
+        IBrush IMutableBrush.ToImmutable()
+        {
+            return new Immutable.ImmutableLinearGradientBrush(this);
+        }
     }
 }
\ No newline at end of file
diff --git a/src/Avalonia.Visuals/Media/RadialGradientBrush.cs b/src/Avalonia.Visuals/Media/RadialGradientBrush.cs
index b721e19138..9f9c2733ec 100644
--- a/src/Avalonia.Visuals/Media/RadialGradientBrush.cs
+++ b/src/Avalonia.Visuals/Media/RadialGradientBrush.cs
@@ -7,7 +7,7 @@ namespace Avalonia.Media
     /// Paints an area with a radial gradient. A focal point defines the beginning of the gradient, 
     /// and a circle defines the end point of the gradient.
     /// </summary>
-    public sealed class RadialGradientBrush : GradientBrush, IRadialGradientBrush
+    public sealed class RadialGradientBrush : GradientBrush, IRadialGradientBrush, IMutableBrush
     {
         /// <summary>
         /// Defines the <see cref="Center"/> property.
@@ -61,5 +61,11 @@ namespace Avalonia.Media
             get { return GetValue(RadiusProperty); }
             set { SetValue(RadiusProperty, value); }
         }
+
+        /// <inheritdoc/>
+        IBrush IMutableBrush.ToImmutable()
+        {
+            return new Immutable.ImmutableRadialGradientBrush(this);
+        }
     }
 }
\ No newline at end of file
diff --git a/src/Avalonia.Visuals/Media/VisualBrush.cs b/src/Avalonia.Visuals/Media/VisualBrush.cs
index 85ccf7afc9..a6d2b8ae8f 100644
--- a/src/Avalonia.Visuals/Media/VisualBrush.cs
+++ b/src/Avalonia.Visuals/Media/VisualBrush.cs
@@ -8,7 +8,7 @@ namespace Avalonia.Media
     /// <summary>
     /// Paints an area with an <see cref="IVisual"/>.
     /// </summary>
-    public class VisualBrush : TileBrush, IVisualBrush
+    public class VisualBrush : TileBrush, IVisualBrush, IMutableBrush
     {
         /// <summary>
         /// Defines the <see cref="Visual"/> property.
@@ -40,5 +40,11 @@ namespace Avalonia.Media
             get { return GetValue(VisualProperty); }
             set { SetValue(VisualProperty, value); }
         }
+
+        /// <inheritdoc/>
+        IBrush IMutableBrush.ToImmutable()
+        {
+            return new Immutable.ImmutableVisualBrush(this);
+        }
     }
 }