Added PngCompressionSize to the IconWriteDefines.

Author: dlemstra

src/Magick.NET/Formats/Icon/IconWriteDefines.cs

@@ -11,7 +11,7 @@ namespace ImageMagick.Formats;
 public sealed class IconWriteDefines : IWriteDefines
 {
     /// <summary>
-    /// Gets or sets a value indicating whether automatic resizing is enabled.
+    /// Gets or sets a value indicating whether automatic resizing is enabled (icon:auto-resize).
     /// </summary>
     public bool? AutoResize { get; set; }
 
@@ -21,6 +21,11 @@ public sealed class IconWriteDefines : IWriteDefines
     public MagickFormat Format
         => MagickFormat.Icon;
 
+    /// <summary>
+    /// Gets or sets the minimum image size threshold above which a PNG image is stored instead of a BMP image (icon:png-compression-size).
+    /// </summary>
+    public uint? PngCompressionSize { get; set; }
+
     /// <summary>
     /// Gets the defines that should be set as a define on an image.
     /// </summary>
@@ -30,6 +35,9 @@ public IEnumerable<IDefine> Defines
         {
             if (AutoResize.HasValue)
                 yield return new MagickDefine(Format, "auto-resize", AutoResize.Value);
+
+            if (PngCompressionSize.HasValue)
+                yield return new MagickDefine(Format, "png-compression-size", PngCompressionSize.Value);
         }
     }
 }

tests/Magick.NET.Tests/Formats/Icon/IconWriteDefinesTests/TheConstructor.cs

@@ -18,6 +18,7 @@ public void ShouldNotSetAnyDefines()
             image.Settings.SetDefines(new IconWriteDefines());
 
             Assert.Null(image.Settings.GetDefine(MagickFormat.Icon, "auto-resize"));
+            Assert.Null(image.Settings.GetDefine(MagickFormat.Icon, "png-compression-size"));
         }
     }
 }

tests/Magick.NET.Tests/Formats/Icon/IconWriteDefinesTests/ThePngCompressionSizeProperty.cs

@@ -0,0 +1,28 @@
+// Copyright Dirk Lemstra https://github.com/dlemstra/Magick.NET.
+// Licensed under the Apache License, Version 2.0.
+
+using ImageMagick;
+using ImageMagick.Formats;
+using Xunit;
+
+namespace Magick.NET.Tests;
+
+public partial class IconWriteDefinesTests
+{
+    public class PngCompressionSize
+    {
+        [Fact]
+        public void ShouldSetTheDefine()
+        {
+            var defines = new IconWriteDefines
+            {
+                PngCompressionSize = 64,
+            };
+
+            using var image = new MagickImage();
+            image.Settings.SetDefines(defines);
+
+            Assert.Equal("64", image.Settings.GetDefine(MagickFormat.Icon, "png-compression-size"));
+        }
+    }
+}