rework image libs

MediaBrowser.ServerApplication/ImageEncoderHelper.cs

@@ -0,0 +1,48 @@
+using System;
+using Emby.Drawing;
+using Emby.Drawing.Net;
+using Emby.Drawing.ImageMagick;
+using Emby.Server.Core;
+using Emby.Server.Implementations;
+using MediaBrowser.Common.Configuration;
+using MediaBrowser.Common.Net;
+using MediaBrowser.Controller.Drawing;
+using MediaBrowser.Model.IO;
+using MediaBrowser.Model.Logging;
+
+namespace MediaBrowser.Server.Startup.Common
+{
+    public class ImageEncoderHelper
+    {
+        public static IImageEncoder GetImageEncoder(ILogger logger, 
+            ILogManager logManager, 
+            IFileSystem fileSystem, 
+            StartupOptions startupOptions, 
+            Func<IHttpClient> httpClient,
+            IApplicationPaths appPaths)
+        {
+            if (!startupOptions.ContainsOption("-enablegdi"))
+            {
+                try
+                {
+                    return new ImageMagickEncoder(logManager.GetLogger("ImageMagick"), appPaths, httpClient, fileSystem);
+                }
+                catch
+                {
+                    logger.Error("Error loading ImageMagick. Will revert to GDI.");
+                }
+            }
+
+            try
+            {
+                return new GDIImageEncoder(fileSystem, logManager.GetLogger("GDI"));
+            }
+            catch
+            {
+                logger.Error("Error loading GDI. Will revert to NullImageEncoder.");
+            }
+
+            return new NullImageEncoder();
+        }
+    }
+}