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authorLukePulverenti <luke.pulverenti@gmail.com>2013-02-20 20:33:05 -0500
committerLukePulverenti <luke.pulverenti@gmail.com>2013-02-20 20:33:05 -0500
commit767cdc1f6f6a63ce997fc9476911e2c361f9d402 (patch)
tree49add55976f895441167c66cfa95e5c7688d18ce /MediaBrowser.Controller/Drawing/ImageManager.cs
parent845554722efaed872948a9e0f7202e3ef52f1b6e (diff)
Pushing missing changes
Diffstat (limited to 'MediaBrowser.Controller/Drawing/ImageManager.cs')
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diff --git a/MediaBrowser.Controller/Drawing/ImageManager.cs b/MediaBrowser.Controller/Drawing/ImageManager.cs
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+using MediaBrowser.Common.Drawing;
+using MediaBrowser.Common.Extensions;
+using MediaBrowser.Common.IO;
+using MediaBrowser.Common.Kernel;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Entities.TV;
+using MediaBrowser.Controller.Persistence;
+using MediaBrowser.Controller.Providers;
+using MediaBrowser.Model.Drawing;
+using MediaBrowser.Model.Entities;
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Drawing.Drawing2D;
+using System.Drawing.Imaging;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Controller.Drawing
+{
+ /// <summary>
+ /// Class ImageManager
+ /// </summary>
+ public class ImageManager : BaseManager<Kernel>
+ {
+ /// <summary>
+ /// Gets the image size cache.
+ /// </summary>
+ /// <value>The image size cache.</value>
+ private FileSystemRepository ImageSizeCache { get; set; }
+
+ /// <summary>
+ /// Gets or sets the resized image cache.
+ /// </summary>
+ /// <value>The resized image cache.</value>
+ private FileSystemRepository ResizedImageCache { get; set; }
+ /// <summary>
+ /// Gets the cropped image cache.
+ /// </summary>
+ /// <value>The cropped image cache.</value>
+ private FileSystemRepository CroppedImageCache { get; set; }
+
+ /// <summary>
+ /// Gets the cropped image cache.
+ /// </summary>
+ /// <value>The cropped image cache.</value>
+ private FileSystemRepository EnhancedImageCache { get; set; }
+
+ /// <summary>
+ /// The cached imaged sizes
+ /// </summary>
+ private readonly ConcurrentDictionary<string, Task<ImageSize>> _cachedImagedSizes = new ConcurrentDictionary<string, Task<ImageSize>>();
+
+ /// <summary>
+ /// Initializes a new instance of the <see cref="ImageManager" /> class.
+ /// </summary>
+ /// <param name="kernel">The kernel.</param>
+ public ImageManager(Kernel kernel)
+ : base(kernel)
+ {
+ ImageSizeCache = new FileSystemRepository(Path.Combine(Kernel.ApplicationPaths.ImageCachePath, "image-sizes"));
+ ResizedImageCache = new FileSystemRepository(Path.Combine(Kernel.ApplicationPaths.ImageCachePath, "resized-images"));
+ CroppedImageCache = new FileSystemRepository(Path.Combine(Kernel.ApplicationPaths.ImageCachePath, "cropped-images"));
+ EnhancedImageCache = new FileSystemRepository(Path.Combine(Kernel.ApplicationPaths.ImageCachePath, "enhanced-images"));
+ }
+
+ /// <summary>
+ /// Processes an image by resizing to target dimensions
+ /// </summary>
+ /// <param name="entity">The entity that owns the image</param>
+ /// <param name="imageType">The image type</param>
+ /// <param name="imageIndex">The image index (currently only used with backdrops)</param>
+ /// <param name="cropWhitespace">if set to <c>true</c> [crop whitespace].</param>
+ /// <param name="dateModified">The last date modified of the original image file</param>
+ /// <param name="toStream">The stream to save the new image to</param>
+ /// <param name="width">Use if a fixed width is required. Aspect ratio will be preserved.</param>
+ /// <param name="height">Use if a fixed height is required. Aspect ratio will be preserved.</param>
+ /// <param name="maxWidth">Use if a max width is required. Aspect ratio will be preserved.</param>
+ /// <param name="maxHeight">Use if a max height is required. Aspect ratio will be preserved.</param>
+ /// <param name="quality">Quality level, from 0-100. Currently only applies to JPG. The default value should suffice.</param>
+ /// <returns>Task.</returns>
+ /// <exception cref="System.ArgumentNullException">entity</exception>
+ public async Task ProcessImage(BaseItem entity, ImageType imageType, int imageIndex, bool cropWhitespace, DateTime dateModified, Stream toStream, int? width, int? height, int? maxWidth, int? maxHeight, int? quality)
+ {
+ if (entity == null)
+ {
+ throw new ArgumentNullException("entity");
+ }
+
+ if (toStream == null)
+ {
+ throw new ArgumentNullException("toStream");
+ }
+
+ var originalImagePath = GetImagePath(entity, imageType, imageIndex);
+
+ if (cropWhitespace)
+ {
+ try
+ {
+ originalImagePath = GetCroppedImage(originalImagePath, dateModified);
+ }
+ catch (Exception ex)
+ {
+ // We have to have a catch-all here because some of the .net image methods throw a plain old Exception
+ Logger.ErrorException("Error cropping image", ex);
+ }
+ }
+
+ try
+ {
+ // Enhance if we have enhancers
+ var ehnancedImagePath = await GetEnhancedImage(originalImagePath, dateModified, entity, imageType, imageIndex).ConfigureAwait(false);
+
+ // If the path changed update dateModified
+ if (!ehnancedImagePath.Equals(originalImagePath, StringComparison.OrdinalIgnoreCase))
+ {
+ dateModified = File.GetLastWriteTimeUtc(ehnancedImagePath);
+ originalImagePath = ehnancedImagePath;
+ }
+ }
+ catch
+ {
+ Logger.Error("Error enhancing image");
+ }
+
+ var originalImageSize = await GetImageSize(originalImagePath, dateModified).ConfigureAwait(false);
+
+ // Determine the output size based on incoming parameters
+ var newSize = DrawingUtils.Resize(originalImageSize, width, height, maxWidth, maxHeight);
+
+ if (!quality.HasValue)
+ {
+ quality = 90;
+ }
+
+ var cacheFilePath = GetCacheFilePath(originalImagePath, newSize, quality.Value, dateModified);
+
+ // Grab the cache file if it already exists
+ try
+ {
+ using (var fileStream = new FileStream(cacheFilePath, FileMode.Open, FileAccess.Read, FileShare.Read, StreamDefaults.DefaultFileStreamBufferSize, FileOptions.Asynchronous))
+ {
+ await fileStream.CopyToAsync(toStream).ConfigureAwait(false);
+ }
+ return;
+ }
+ catch (FileNotFoundException)
+ {
+ // Cache file doesn't exist. No biggie.
+ }
+
+ using (var fileStream = File.OpenRead(originalImagePath))
+ {
+ using (var originalImage = Bitmap.FromStream(fileStream, true, false))
+ {
+ var newWidth = Convert.ToInt32(newSize.Width);
+ var newHeight = Convert.ToInt32(newSize.Height);
+
+ // Graphics.FromImage will throw an exception if the PixelFormat is Indexed, so we need to handle that here
+ var thumbnail = originalImage.PixelFormat.HasFlag(PixelFormat.Indexed) ? new Bitmap(originalImage, newWidth, newHeight) : new Bitmap(newWidth, newHeight, originalImage.PixelFormat);
+
+ // Preserve the original resolution
+ thumbnail.SetResolution(originalImage.HorizontalResolution, originalImage.VerticalResolution);
+
+ var thumbnailGraph = Graphics.FromImage(thumbnail);
+
+ thumbnailGraph.CompositingQuality = CompositingQuality.HighQuality;
+ thumbnailGraph.SmoothingMode = SmoothingMode.HighQuality;
+ thumbnailGraph.InterpolationMode = InterpolationMode.HighQualityBicubic;
+ thumbnailGraph.PixelOffsetMode = PixelOffsetMode.HighQuality;
+ thumbnailGraph.CompositingMode = CompositingMode.SourceOver;
+
+ thumbnailGraph.DrawImage(originalImage, 0, 0, newWidth, newHeight);
+
+ var outputFormat = originalImage.RawFormat;
+
+ using (var memoryStream = new MemoryStream { })
+ {
+ // Save to the memory stream
+ thumbnail.Save(outputFormat, memoryStream, quality.Value);
+
+ var bytes = memoryStream.ToArray();
+
+ var outputTask = Task.Run(async () => await toStream.WriteAsync(bytes, 0, bytes.Length));
+
+ // Save to the cache location
+ using (var cacheFileStream = new FileStream(cacheFilePath, FileMode.Create, FileAccess.Write, FileShare.Read, StreamDefaults.DefaultFileStreamBufferSize, FileOptions.Asynchronous))
+ {
+ // Save to the filestream
+ await cacheFileStream.WriteAsync(bytes, 0, bytes.Length);
+ }
+
+ await outputTask.ConfigureAwait(false);
+ }
+
+ thumbnailGraph.Dispose();
+ thumbnail.Dispose();
+ }
+ }
+ }
+
+ /// <summary>
+ /// Gets the cache file path based on a set of parameters
+ /// </summary>
+ /// <param name="originalPath">The path to the original image file</param>
+ /// <param name="outputSize">The size to output the image in</param>
+ /// <param name="quality">Quality level, from 0-100. Currently only applies to JPG. The default value should suffice.</param>
+ /// <param name="dateModified">The last modified date of the image</param>
+ /// <returns>System.String.</returns>
+ private string GetCacheFilePath(string originalPath, ImageSize outputSize, int quality, DateTime dateModified)
+ {
+ var filename = originalPath;
+
+ filename += "width=" + outputSize.Width;
+
+ filename += "height=" + outputSize.Height;
+
+ filename += "quality=" + quality;
+
+ filename += "datemodified=" + dateModified.Ticks;
+
+ return ResizedImageCache.GetResourcePath(filename, Path.GetExtension(originalPath));
+ }
+
+
+ /// <summary>
+ /// Gets image dimensions
+ /// </summary>
+ /// <param name="imagePath">The image path.</param>
+ /// <param name="dateModified">The date modified.</param>
+ /// <returns>Task{ImageSize}.</returns>
+ /// <exception cref="System.ArgumentNullException">imagePath</exception>
+ public Task<ImageSize> GetImageSize(string imagePath, DateTime dateModified)
+ {
+ if (string.IsNullOrEmpty(imagePath))
+ {
+ throw new ArgumentNullException("imagePath");
+ }
+
+ var name = imagePath + "datemodified=" + dateModified.Ticks;
+
+ return _cachedImagedSizes.GetOrAdd(name, keyName => GetImageSizeTask(keyName, imagePath));
+ }
+
+ /// <summary>
+ /// Gets cached image dimensions, or results null if non-existant
+ /// </summary>
+ /// <param name="keyName">Name of the key.</param>
+ /// <param name="imagePath">The image path.</param>
+ /// <returns>Task{ImageSize}.</returns>
+ private Task<ImageSize> GetImageSizeTask(string keyName, string imagePath)
+ {
+ return Task.Run(() => GetImageSize(keyName, imagePath));
+ }
+
+ /// <summary>
+ /// Gets the size of the image.
+ /// </summary>
+ /// <param name="keyName">Name of the key.</param>
+ /// <param name="imagePath">The image path.</param>
+ /// <returns>ImageSize.</returns>
+ private ImageSize GetImageSize(string keyName, string imagePath)
+ {
+ // Now check the file system cache
+ var fullCachePath = ImageSizeCache.GetResourcePath(keyName, ".pb");
+
+ try
+ {
+ var result = Kernel.ProtobufSerializer.DeserializeFromFile<int[]>(fullCachePath);
+
+ return new ImageSize { Width = result[0], Height = result[1] };
+ }
+ catch (FileNotFoundException)
+ {
+ // Cache file doesn't exist no biggie
+ }
+
+ var size = ImageHeader.GetDimensions(imagePath);
+
+ var imageSize = new ImageSize { Width = size.Width, Height = size.Height };
+
+ // Update the file system cache
+ CacheImageSize(fullCachePath, size.Width, size.Height);
+
+ return imageSize;
+ }
+
+ /// <summary>
+ /// Caches image dimensions
+ /// </summary>
+ /// <param name="cachePath">The cache path.</param>
+ /// <param name="width">The width.</param>
+ /// <param name="height">The height.</param>
+ private void CacheImageSize(string cachePath, int width, int height)
+ {
+ var output = new[] { width, height };
+
+ Kernel.ProtobufSerializer.SerializeToFile(output, cachePath);
+ }
+
+ /// <summary>
+ /// Gets the image path.
+ /// </summary>
+ /// <param name="item">The item.</param>
+ /// <param name="imageType">Type of the image.</param>
+ /// <param name="imageIndex">Index of the image.</param>
+ /// <returns>System.String.</returns>
+ /// <exception cref="System.ArgumentNullException">item</exception>
+ /// <exception cref="System.InvalidOperationException"></exception>
+ public string GetImagePath(BaseItem item, ImageType imageType, int imageIndex)
+ {
+ if (item == null)
+ {
+ throw new ArgumentNullException("item");
+ }
+
+ if (imageType == ImageType.Backdrop)
+ {
+ if (item.BackdropImagePaths == null)
+ {
+ throw new InvalidOperationException(string.Format("Item {0} does not have any Backdrops.", item.Name));
+ }
+
+ return item.BackdropImagePaths[imageIndex];
+ }
+
+ if (imageType == ImageType.Screenshot)
+ {
+ if (item.ScreenshotImagePaths == null)
+ {
+ throw new InvalidOperationException(string.Format("Item {0} does not have any Screenshots.", item.Name));
+ }
+
+ return item.ScreenshotImagePaths[imageIndex];
+ }
+
+ if (imageType == ImageType.ChapterImage)
+ {
+ var video = (Video)item;
+
+ if (video.Chapters == null)
+ {
+ throw new InvalidOperationException(string.Format("Item {0} does not have any Chapters.", item.Name));
+ }
+
+ return video.Chapters[imageIndex].ImagePath;
+ }
+
+ return item.GetImage(imageType);
+ }
+
+ /// <summary>
+ /// Gets the image date modified.
+ /// </summary>
+ /// <param name="item">The item.</param>
+ /// <param name="imageType">Type of the image.</param>
+ /// <param name="imageIndex">Index of the image.</param>
+ /// <returns>DateTime.</returns>
+ /// <exception cref="System.ArgumentNullException">item</exception>
+ public DateTime GetImageDateModified(BaseItem item, ImageType imageType, int imageIndex)
+ {
+ if (item == null)
+ {
+ throw new ArgumentNullException("item");
+ }
+
+ var imagePath = GetImagePath(item, imageType, imageIndex);
+
+ return GetImageDateModified(item, imagePath);
+ }
+
+ /// <summary>
+ /// Gets the image date modified.
+ /// </summary>
+ /// <param name="item">The item.</param>
+ /// <param name="imagePath">The image path.</param>
+ /// <returns>DateTime.</returns>
+ /// <exception cref="System.ArgumentNullException">item</exception>
+ public DateTime GetImageDateModified(BaseItem item, string imagePath)
+ {
+ if (item == null)
+ {
+ throw new ArgumentNullException("item");
+ }
+
+ if (string.IsNullOrEmpty(imagePath))
+ {
+ throw new ArgumentNullException("imagePath");
+ }
+
+ var metaFileEntry = item.ResolveArgs.GetMetaFileByPath(imagePath);
+
+ // If we didn't the metafile entry, check the Season
+ if (!metaFileEntry.HasValue)
+ {
+ var episode = item as Episode;
+
+ if (episode != null && episode.Season != null)
+ {
+ episode.Season.ResolveArgs.GetMetaFileByPath(imagePath);
+ }
+ }
+
+ // See if we can avoid a file system lookup by looking for the file in ResolveArgs
+ return metaFileEntry == null ? File.GetLastWriteTimeUtc(imagePath) : metaFileEntry.Value.LastWriteTimeUtc;
+ }
+
+ /// <summary>
+ /// Crops whitespace from an image, caches the result, and returns the cached path
+ /// </summary>
+ /// <param name="originalImagePath">The original image path.</param>
+ /// <param name="dateModified">The date modified.</param>
+ /// <returns>System.String.</returns>
+ private string GetCroppedImage(string originalImagePath, DateTime dateModified)
+ {
+ var name = originalImagePath;
+ name += "datemodified=" + dateModified.Ticks;
+
+ var croppedImagePath = CroppedImageCache.GetResourcePath(name, Path.GetExtension(originalImagePath));
+
+ if (!CroppedImageCache.ContainsFilePath(croppedImagePath))
+ {
+ using (var fileStream = File.OpenRead(originalImagePath))
+ {
+ using (var originalImage = (Bitmap)Bitmap.FromStream(fileStream, true, false))
+ {
+ var outputFormat = originalImage.RawFormat;
+
+ using (var croppedImage = originalImage.CropWhitespace())
+ {
+ using (var cacheFileStream = new FileStream(croppedImagePath, FileMode.Create))
+ {
+ croppedImage.Save(outputFormat, cacheFileStream, 100);
+ }
+ }
+ }
+ }
+ }
+
+ return croppedImagePath;
+ }
+
+ /// <summary>
+ /// Runs an image through the image enhancers, caches the result, and returns the cached path
+ /// </summary>
+ /// <param name="originalImagePath">The original image path.</param>
+ /// <param name="dateModified">The date modified of the original image file.</param>
+ /// <param name="item">The item.</param>
+ /// <param name="imageType">Type of the image.</param>
+ /// <param name="imageIndex">Index of the image.</param>
+ /// <returns>System.String.</returns>
+ /// <exception cref="System.ArgumentNullException">originalImagePath</exception>
+ public async Task<string> GetEnhancedImage(string originalImagePath, DateTime dateModified, BaseItem item, ImageType imageType, int imageIndex)
+ {
+ if (string.IsNullOrEmpty(originalImagePath))
+ {
+ throw new ArgumentNullException("originalImagePath");
+ }
+
+ if (item == null)
+ {
+ throw new ArgumentNullException("item");
+ }
+
+ var supportedEnhancers = Kernel.ImageEnhancers.Where(i => i.Supports(item, imageType)).ToList();
+
+ // No enhancement - don't cache
+ if (supportedEnhancers.Count == 0)
+ {
+ return originalImagePath;
+ }
+
+ var cacheGuid = GetImageCacheTag(originalImagePath, dateModified, supportedEnhancers, item, imageType);
+
+ // All enhanced images are saved as png to allow transparency
+ var enhancedImagePath = EnhancedImageCache.GetResourcePath(cacheGuid + ".png");
+
+ if (!EnhancedImageCache.ContainsFilePath(enhancedImagePath))
+ {
+ using (var fileStream = File.OpenRead(originalImagePath))
+ {
+ using (var originalImage = Image.FromStream(fileStream, true, false))
+ {
+ //Pass the image through registered enhancers
+ using (var newImage = await ExecuteImageEnhancers(supportedEnhancers, originalImage, item, imageType, imageIndex).ConfigureAwait(false))
+ {
+ //And then save it in the cache
+ newImage.Save(enhancedImagePath, ImageFormat.Png);
+ }
+ }
+ }
+ }
+
+ return enhancedImagePath;
+ }
+
+ /// <summary>
+ /// Gets the image cache tag.
+ /// </summary>
+ /// <param name="item">The item.</param>
+ /// <param name="imageType">Type of the image.</param>
+ /// <param name="imagePath">The image path.</param>
+ /// <returns>Guid.</returns>
+ /// <exception cref="System.ArgumentNullException">item</exception>
+ public Guid GetImageCacheTag(BaseItem item, ImageType imageType, string imagePath)
+ {
+ if (item == null)
+ {
+ throw new ArgumentNullException("item");
+ }
+
+ if (string.IsNullOrEmpty(imagePath))
+ {
+ throw new ArgumentNullException("imagePath");
+ }
+
+ var dateModified = GetImageDateModified(item, imagePath);
+
+ var supportedEnhancers = Kernel.ImageEnhancers.Where(i => i.Supports(item, imageType));
+
+ return GetImageCacheTag(imagePath, dateModified, supportedEnhancers, item, imageType);
+ }
+
+ /// <summary>
+ /// Gets the image cache tag.
+ /// </summary>
+ /// <param name="originalImagePath">The original image path.</param>
+ /// <param name="dateModified">The date modified of the original image file.</param>
+ /// <param name="imageEnhancers">The image enhancers.</param>
+ /// <param name="item">The item.</param>
+ /// <param name="imageType">Type of the image.</param>
+ /// <returns>Guid.</returns>
+ /// <exception cref="System.ArgumentNullException">item</exception>
+ public Guid GetImageCacheTag(string originalImagePath, DateTime dateModified, IEnumerable<BaseImageEnhancer> imageEnhancers, BaseItem item, ImageType imageType)
+ {
+ if (item == null)
+ {
+ throw new ArgumentNullException("item");
+ }
+
+ if (imageEnhancers == null)
+ {
+ throw new ArgumentNullException("imageEnhancers");
+ }
+
+ if (string.IsNullOrEmpty(originalImagePath))
+ {
+ throw new ArgumentNullException("originalImagePath");
+ }
+
+ // Cache name is created with supported enhancers combined with the last config change so we pick up new config changes
+ var cacheKeys = imageEnhancers.Select(i => i.GetType().Name + i.LastConfigurationChange(item, imageType).Ticks).ToList();
+ cacheKeys.Add(originalImagePath + dateModified.Ticks);
+
+ return string.Join("|", cacheKeys.ToArray()).GetMD5();
+ }
+
+ /// <summary>
+ /// Executes the image enhancers.
+ /// </summary>
+ /// <param name="imageEnhancers">The image enhancers.</param>
+ /// <param name="originalImage">The original image.</param>
+ /// <param name="item">The item.</param>
+ /// <param name="imageType">Type of the image.</param>
+ /// <param name="imageIndex">Index of the image.</param>
+ /// <returns>Task{EnhancedImage}.</returns>
+ private async Task<Image> ExecuteImageEnhancers(IEnumerable<BaseImageEnhancer> imageEnhancers, Image originalImage, BaseItem item, ImageType imageType, int imageIndex)
+ {
+ var result = originalImage;
+
+ // Run the enhancers sequentially in order of priority
+ foreach (var enhancer in imageEnhancers)
+ {
+ result = await enhancer.EnhanceImageAsync(item, result, imageType, imageIndex).ConfigureAwait(false);
+ }
+
+ return result;
+ }
+
+ /// <summary>
+ /// Releases unmanaged and - optionally - managed resources.
+ /// </summary>
+ /// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
+ protected override void Dispose(bool dispose)
+ {
+ if (dispose)
+ {
+ ImageSizeCache.Dispose();
+ ResizedImageCache.Dispose();
+ CroppedImageCache.Dispose();
+ EnhancedImageCache.Dispose();
+ }
+
+ base.Dispose(dispose);
+ }
+ }
+}