Serve original image file when possible

MediaBrowser.Controller/Drawing/ImageProcessingOptions.cs

@@ -40,5 +40,37 @@ namespace MediaBrowser.Controller.Drawing
         public int? PercentPlayed { get; set; }
 
         public string BackgroundColor { get; set; }
+
+        public bool HasDefaultOptions()
+        {
+            return HasDefaultOptionsWithoutSize() && 
+                !Width.HasValue && 
+                !Height.HasValue && 
+                !MaxWidth.HasValue && 
+                !MaxHeight.HasValue;
+        }
+
+        public bool HasDefaultOptionsWithoutSize()
+        {
+            return !CropWhiteSpace &&
+                (!Quality.HasValue || Quality.Value == 100) &&
+                IsOutputFormatDefault &&
+                !AddPlayedIndicator &&
+                !PercentPlayed.HasValue &&
+                string.IsNullOrEmpty(BackgroundColor);
+        }
+
+        private bool IsOutputFormatDefault
+        {
+            get
+            {
+                if (OutputFormat == ImageOutputFormat.Original)
+                {
+                    return true;
+                }
+
+                return false;
+            }
+        }
     }
 }

MediaBrowser.Model/Drawing/DrawingUtils.cs

@@ -141,5 +141,10 @@ namespace MediaBrowser.Model.Drawing
         /// </summary>
         /// <value>The width.</value>
         public double Width { get; set; }
+
+        public bool Equals(ImageSize size)
+        {
+            return Width.Equals(size.Width) && Height.Equals(size.Height);
+        }
     }
 }

MediaBrowser.Server.Implementations/Drawing/ImageProcessor.cs

@@ -3,7 +3,6 @@ using MediaBrowser.Common.IO;
 using MediaBrowser.Controller;
 using MediaBrowser.Controller.Drawing;
 using MediaBrowser.Controller.Entities;
-using MediaBrowser.Controller.IO;
 using MediaBrowser.Controller.Providers;
 using MediaBrowser.Model.Drawing;
 using MediaBrowser.Model.Entities;
@@ -85,6 +84,17 @@ namespace MediaBrowser.Server.Implementations.Drawing
             }
 
             var originalImagePath = options.OriginalImagePath;
+            
+            if (options.HasDefaultOptions())
+            {
+                // Just spit out the original file if all the options are default
+                using (var fileStream = _fileSystem.GetFileStream(originalImagePath, FileMode.Open, FileAccess.Read, FileShare.Read, true))
+                {
+                    await fileStream.CopyToAsync(toStream).ConfigureAwait(false);
+                    return;
+                }
+            }
+
             var dateModified = options.OriginalImageDateModified;
 
             if (options.CropWhiteSpace)
@@ -106,6 +116,16 @@ namespace MediaBrowser.Server.Implementations.Drawing
             // Determine the output size based on incoming parameters
             var newSize = DrawingUtils.Resize(originalImageSize, options.Width, options.Height, options.MaxWidth, options.MaxHeight);
 
+            if (options.HasDefaultOptionsWithoutSize() && newSize.Equals(originalImageSize))
+            {
+                // Just spit out the original file the new size equals the old
+                using (var fileStream = _fileSystem.GetFileStream(originalImagePath, FileMode.Open, FileAccess.Read, FileShare.Read, true))
+                {
+                    await fileStream.CopyToAsync(toStream).ConfigureAwait(false);
+                    return;
+                }
+            }
+            
             var quality = options.Quality ?? 90;
 
             var cacheFilePath = GetCacheFilePath(originalImagePath, newSize, quality, dateModified, options.OutputFormat, options.AddPlayedIndicator, options.PercentPlayed, options.BackgroundColor);