support photo orientation

Emby.Drawing/GDI/GDIImageEncoder.cs

@@ -89,7 +89,7 @@ namespace Emby.Drawing.GDI
             }
         }
 
-        public void EncodeImage(string inputPath, string cacheFilePath, int width, int height, int quality, ImageProcessingOptions options, ImageFormat selectedOutputFormat)
+        public void EncodeImage(string inputPath, string cacheFilePath, int rotationAngle, int width, int height, int quality, ImageProcessingOptions options, ImageFormat selectedOutputFormat)
         {
             var hasPostProcessing = !string.IsNullOrEmpty(options.BackgroundColor) || options.UnplayedCount.HasValue || options.AddPlayedIndicator || options.PercentPlayed > 0;
 

Emby.Drawing/IImageEncoder.cs

@@ -27,12 +27,13 @@ namespace Emby.Drawing
         /// </summary>
         /// <param name="inputPath">The input path.</param>
         /// <param name="outputPath">The output path.</param>
+        /// <param name="rotationAngle">The rotation angle.</param>
         /// <param name="width">The width.</param>
         /// <param name="height">The height.</param>
         /// <param name="quality">The quality.</param>
         /// <param name="options">The options.</param>
         /// <param name="outputFormat">The output format.</param>
-        void EncodeImage(string inputPath, string outputPath, int width, int height, int quality, ImageProcessingOptions options, ImageFormat outputFormat);
+        void EncodeImage(string inputPath, string outputPath, int rotationAngle, int width, int height, int quality, ImageProcessingOptions options, ImageFormat outputFormat);
 
         /// <summary>
         /// Creates the image collage.

Emby.Drawing/ImageMagick/ImageMagickEncoder.cs

@@ -139,7 +139,7 @@ namespace Emby.Drawing.ImageMagick
                 string.Equals(ext, ".webp", StringComparison.OrdinalIgnoreCase);
         }
 
-        public void EncodeImage(string inputPath, string outputPath, int width, int height, int quality, ImageProcessingOptions options, ImageFormat selectedOutputFormat)
+        public void EncodeImage(string inputPath, string outputPath, int rotationAngle, int width, int height, int quality, ImageProcessingOptions options, ImageFormat selectedOutputFormat)
         {
             // Even if the caller specified 100, don't use it because it takes forever
             quality = Math.Min(quality, 99);
@@ -150,6 +150,11 @@ namespace Emby.Drawing.ImageMagick
                 {
                     ScaleImage(originalImage, width, height);
 
+                    if (rotationAngle > 0)
+                    {
+                        RotateImage(originalImage, rotationAngle);
+                    }
+
                     DrawIndicator(originalImage, width, height, options);
 
                     originalImage.CurrentImage.CompressionQuality = quality;
@@ -166,6 +171,11 @@ namespace Emby.Drawing.ImageMagick
                     {
                         ScaleImage(originalImage, width, height);
 
+                        if (rotationAngle > 0)
+                        {
+                            RotateImage(originalImage, rotationAngle);
+                        }
+
                         wand.CurrentImage.CompositeImage(originalImage, CompositeOperator.OverCompositeOp, 0, 0);
                         DrawIndicator(wand, width, height, options);
 
@@ -179,6 +189,14 @@ namespace Emby.Drawing.ImageMagick
             SaveDelay();
         }
 
+        public static void RotateImage(MagickWand wand, float angle)
+        {
+            using (var pixelWand = new PixelWand("none", 1))
+            {
+                wand.CurrentImage.RotateImage(pixelWand, angle);
+            }
+        }
+
         private void ScaleImage(MagickWand wand, int width, int height)
         {
             var highQuality = false;

Emby.Drawing/ImageProcessor.cs

@@ -257,7 +257,7 @@ namespace Emby.Drawing
 
                     imageProcessingLockTaken = true;
 
-                    _imageEncoder.EncodeImage(originalImagePath, cacheFilePath, newWidth, newHeight, quality, options, outputFormat);
+                    _imageEncoder.EncodeImage(originalImagePath, cacheFilePath, GetRotationAngle(options.Item), newWidth, newHeight, quality, options, outputFormat);
                 }
 
                 return new Tuple<string, string>(cacheFilePath, GetMimeType(outputFormat, cacheFilePath));
@@ -281,6 +281,35 @@ namespace Emby.Drawing
             }
         }
 
+        private int GetRotationAngle(IHasImages item)
+        {
+            var photo = item as Photo;
+            if (photo != null && photo.Orientation.HasValue)
+            {
+                switch (photo.Orientation.Value)
+                {
+                    case ImageOrientation.TopLeft:
+                        return 0;
+                    case ImageOrientation.TopRight:
+                        return 0;
+                    case ImageOrientation.BottomLeft:
+                        return 270;
+                    case ImageOrientation.BottomRight:
+                        return 180;
+                    case ImageOrientation.LeftBottom:
+                        return -90;
+                    case ImageOrientation.LeftTop:
+                        return 0;
+                    case ImageOrientation.RightBottom:
+                        return 0;
+                    case ImageOrientation.RightTop:
+                        return 90;
+                }
+            }
+
+            return 0;
+        }
+
         private string GetMimeType(ImageFormat format, string path)
         {
             if (format == ImageFormat.Bmp)

Emby.Drawing/NullImageEncoder.cs

@@ -32,7 +32,7 @@ namespace Emby.Drawing
             throw new NotImplementedException();
         }
 
-        public void EncodeImage(string inputPath, string outputPath, int width, int height, int quality, ImageProcessingOptions options, ImageFormat selectedOutputFormat)
+        public void EncodeImage(string inputPath, string outputPath, int rotationAngle, int width, int height, int quality, ImageProcessingOptions options, ImageFormat selectedOutputFormat)
         {
             throw new NotImplementedException();
         }

MediaBrowser.Server.Implementations/Dto/DtoService.cs

@@ -1783,11 +1783,31 @@ namespace MediaBrowser.Server.Implementations.Dto
                 }
             }
 
-            if (size.Width > 0 && size.Height > 0)
+            var width = size.Width;
+            var height = size.Height;
+
+            if (width == 0 || height == 0)
             {
-                return size.Width / size.Height;
+                return null;
             }
-            return null;
+
+            var photo = item as Photo;
+            if (photo != null && photo.Orientation.HasValue)
+            {
+                switch (photo.Orientation.Value)
+                {
+                    case ImageOrientation.LeftBottom:
+                    case ImageOrientation.LeftTop:
+                    case ImageOrientation.RightBottom:
+                    case ImageOrientation.RightTop:
+                        var temp = height;
+                        height = width;
+                        width = temp;
+                        break;
+                }
+            }
+
+            return width / height;
         }
     }
 }