support null image encoder

Emby.Drawing/NullImageEncoder.cs

@@ -0,0 +1,64 @@
+using System;
+using MediaBrowser.Controller.Drawing;
+using MediaBrowser.Model.Drawing;
+
+namespace Emby.Drawing
+{
+    public class NullImageEncoder : IImageEncoder
+    {
+        public string[] SupportedInputFormats
+        {
+            get
+            {
+                return new[]
+                {
+                    "png",
+                    "jpeg",
+                    "jpg"
+                };
+            }
+        }
+
+        public ImageFormat[] SupportedOutputFormats
+        {
+            get
+            {
+                return new[] { ImageFormat.Jpg, ImageFormat.Png };
+            }
+        }
+
+        public void CropWhiteSpace(string inputPath, string outputPath)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void EncodeImage(string inputPath, string outputPath, int width, int height, int quality, ImageProcessingOptions options)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void CreateImageCollage(ImageCollageOptions options)
+        {
+            throw new NotImplementedException();
+        }
+
+        public string Name
+        {
+            get { return "Null Image Encoder"; }
+        }
+
+        public bool SupportsImageCollageCreation
+        {
+            get { return false; }
+        }
+
+        public bool SupportsImageEncoding
+        {
+            get { return false; }
+        }
+
+        public void Dispose()
+        {
+        }
+    }
+}