From 44aa14f476974dc9568c9eb719032f910a273f08 Mon Sep 17 00:00:00 2001
From: Florian Levis <levis.florian@gmail.com>
Date: Fri, 8 Mar 2024 13:49:16 +0100
Subject: [PATCH] fix: add guards for MagickImage.SetBitDepth

---
 src/Magick.NET/MagickImage.cs                            | 6 +++++-
 .../MagickImageTests/TheSetBitDepthMethod.cs             | 9 +++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/Magick.NET/MagickImage.cs b/src/Magick.NET/MagickImage.cs
index e873129de6..4ef8337e79 100644
--- a/src/Magick.NET/MagickImage.cs
+++ b/src/Magick.NET/MagickImage.cs
@@ -5784,7 +5784,11 @@ public void SetBitDepth(int value)
     /// <param name="channels">The channel to set the depth for.</param>
     /// <exception cref="MagickException">Thrown when an error is raised by ImageMagick.</exception>
     public void SetBitDepth(int value, Channels channels)
-        => _nativeInstance.SetBitDepth(value, channels);
+    {
+        Throw.IfNegative(nameof(value), value);
+
+        _nativeInstance.SetBitDepth(value, channels);
+    }
 
     /// <summary>
     /// Sets the default clipping path.
diff --git a/tests/Magick.NET.Tests/MagickImageTests/TheSetBitDepthMethod.cs b/tests/Magick.NET.Tests/MagickImageTests/TheSetBitDepthMethod.cs
index 97918f7ee4..b5dd82e9d6 100644
--- a/tests/Magick.NET.Tests/MagickImageTests/TheSetBitDepthMethod.cs
+++ b/tests/Magick.NET.Tests/MagickImageTests/TheSetBitDepthMethod.cs
@@ -1,6 +1,7 @@
 // Copyright Dirk Lemstra https://github.com/dlemstra/Magick.NET.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
 using ImageMagick;
 using Xunit;
 
@@ -10,6 +11,14 @@ public partial class MagickImageTests
 {
     public class TheSetBitDepthMethod
     {
+        [Fact]
+        public void ShouldThrowExceptionWhenValueIsNegative()
+        {
+            using var image = new MagickImage(Files.RoseSparkleGIF);
+
+            Assert.Throws<ArgumentException>("value", () => image.SetBitDepth(-1));
+        }
+
         [Fact]
         public void ShouldChangeTheBitDepth()
         {