New: Use ImageSharp for resizing

src/NzbDrone.Common/Disk/DiskProviderBase.cs

@@ -122,20 +122,6 @@ namespace NzbDrone.Common.Disk
             }
         }
 
-        public bool CanUseGDIPlus()
-        {
-            try
-            {
-                GdiPlusInterop.CheckGdiPlus();
-                return true;
-            }
-            catch (DllNotFoundException ex)
-            {
-                Logger.Trace(ex, "System does not have libgdiplus.");
-                return false;
-            }
-        }
-
         public bool FolderWritable(string path)
         {
             Ensure.That(path, () => path).IsValidPath();

src/NzbDrone.Common/Disk/GdiPlusInterop.cs

@@ -1,44 +0,0 @@
-using System;
-using System.Drawing;
-using NzbDrone.Common.EnvironmentInfo;
-
-namespace NzbDrone.Common.Disk
-{
-    public static class GdiPlusInterop
-    {
-        private static Exception _gdiPlusException;
-
-        static GdiPlusInterop()
-        {
-            TestLibrary();
-        }
-
-        private static void TestLibrary()
-        {
-            if (OsInfo.IsWindows)
-            {
-                return;
-            }
-
-            try
-            {
-                // We use StringFormat as test coz it gets properly cleaned up by the finalizer even if gdiplus is absent and is relatively non-invasive.
-                var strFormat = new StringFormat();
-
-                strFormat.Dispose();
-            }
-            catch (Exception ex)
-            {
-                _gdiPlusException = ex;
-            }
-        }
-
-        public static void CheckGdiPlus()
-        {
-            if (_gdiPlusException != null)
-            {
-                throw new DllNotFoundException("Couldn't load GDIPlus library", _gdiPlusException);
-            }
-        }
-    }
-}

src/NzbDrone.Common/Disk/IDiskProvider.cs

@@ -19,7 +19,6 @@ namespace NzbDrone.Common.Disk
         bool FolderExists(string path);
         bool FileExists(string path);
         bool FileExists(string path, StringComparison stringComparison);
-        bool CanUseGDIPlus();
         bool FolderWritable(string path);
         string[] GetDirectories(string path);
         string[] GetFiles(string path, SearchOption searchOption);

src/NzbDrone.Core/MediaCover/ImageResizer.cs

@@ -1,6 +1,8 @@
-using ImageResizer;
 using System;
 using NzbDrone.Common.Disk;
+using SixLabors.ImageSharp;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.Memory;
 
 namespace NzbDrone.Core.MediaCover
 {
@@ -16,28 +18,20 @@ namespace NzbDrone.Core.MediaCover
         public ImageResizer(IDiskProvider diskProvider)
         {
             _diskProvider = diskProvider;
+
+            // More conservative memory allocation
+            SixLabors.ImageSharp.Configuration.Default.MemoryAllocator = new SimpleGcMemoryAllocator();
         }
 
         public void Resize(string source, string destination, int height)
         {
             try
             {
-                if (!_diskProvider.CanUseGDIPlus())
-                {
-                    throw new Exception("Can't resize without libgdiplus.");
-                }
-
-                using (var sourceStream = _diskProvider.OpenReadStream(source))
+                using (var image = Image.Load(source))
                 {
-                    using (var outputStream = _diskProvider.OpenWriteStream(destination))
-                    {
-                        var settings = new Instructions();
-                        settings.Height = height;
-
-                        var job = new ImageJob(sourceStream, outputStream, settings);
-
-                        ImageBuilder.Current.Build(job);
-                    }
+                    var width = (int)Math.Floor((double)image.Width * (double)height / (double)image.Height);
+                    image.Mutate(x => x.Resize(width, height));
+                    image.Save(destination);
                 }
             }
             catch

src/NzbDrone.Core/Radarr.Core.csproj

@@ -7,7 +7,7 @@
     <PackageReference Include="FluentMigrator.Runner" Version="4.0.0-alpha.268" />
     <PackageReference Include="FluentMigrator.Runner.SQLite" Version="4.0.0-alpha.268" />
     <PackageReference Include="FluentValidation" Version="8.4.0" />
-    <PackageReference Include="ImageResizer" Version="4.2.5" />
+    <PackageReference Include="SixLabors.ImageSharp" Version="1.0.0-beta0007" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
     <PackageReference Include="NLog" Version="4.6.7" />
     <PackageReference Include="OAuth" Version="1.0.3" />