mirror of https://github.com/SixLabors/ImageSharp
Vicente Penades
8 years ago
2 changed files with 209 additions and 70 deletions
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using System; |
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using System.Collections.Concurrent; |
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using System.Collections.Generic; |
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using System.Linq; |
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using System.Text; |
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namespace SixLabors.ImageSharp.Formats |
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{ |
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/// <summary>
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/// Collection of Image Formats to be used in <see cref="Configuration" /> class.
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/// </summary>
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public class ImageFormatsManager |
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{ |
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/// <summary>
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/// Initializes a new instance of the <see cref="ImageFormatsManager" /> class.
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/// </summary>
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public ImageFormatsManager() |
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{ |
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} |
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/// <summary>
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/// The list of supported <see cref="IImageEncoder"/> keyed to mime types.
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/// </summary>
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private readonly ConcurrentDictionary<IImageFormat, IImageEncoder> mimeTypeEncoders = new ConcurrentDictionary<IImageFormat, IImageEncoder>(); |
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/// <summary>
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/// The list of supported <see cref="IImageEncoder"/> keyed to mime types.
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/// </summary>
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private readonly ConcurrentDictionary<IImageFormat, IImageDecoder> mimeTypeDecoders = new ConcurrentDictionary<IImageFormat, IImageDecoder>(); |
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/// <summary>
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/// The list of supported <see cref="IImageFormat"/>s.
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/// </summary>
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private readonly ConcurrentBag<IImageFormat> imageFormats = new ConcurrentBag<IImageFormat>(); |
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/// <summary>
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/// The list of supported <see cref="IImageFormatDetector"/>s.
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/// </summary>
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private ConcurrentBag<IImageFormatDetector> imageFormatDetectors = new ConcurrentBag<IImageFormatDetector>(); |
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/// <summary>
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/// Gets the maximum header size of all the formats.
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/// </summary>
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internal int MaxHeaderSize { get; private set; } |
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/// <summary>
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/// Gets the currently registered <see cref="IImageFormat"/>s.
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/// </summary>
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public IEnumerable<IImageFormat> ImageFormats => this.imageFormats; |
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/// <summary>
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/// Gets the currently registered <see cref="IImageFormatDetector"/>s.
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/// </summary>
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internal IEnumerable<IImageFormatDetector> FormatDetectors => this.imageFormatDetectors; |
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/// <summary>
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/// Gets the currently registered <see cref="IImageDecoder"/>s.
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/// </summary>
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internal IEnumerable<KeyValuePair<IImageFormat, IImageDecoder>> ImageDecoders => this.mimeTypeDecoders; |
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/// <summary>
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/// Gets the currently registered <see cref="IImageEncoder"/>s.
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/// </summary>
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internal IEnumerable<KeyValuePair<IImageFormat, IImageEncoder>> ImageEncoders => this.mimeTypeEncoders; |
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/// <summary>
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/// Registers a new format provider.
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/// </summary>
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/// <param name="format">The format to register as a known format.</param>
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public void AddImageFormat(IImageFormat format) |
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{ |
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Guard.NotNull(format, nameof(format)); |
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Guard.NotNull(format.MimeTypes, nameof(format.MimeTypes)); |
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Guard.NotNull(format.FileExtensions, nameof(format.FileExtensions)); |
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this.imageFormats.Add(format); |
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} |
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/// <summary>
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/// For the specified file extensions type find the e <see cref="IImageFormat"/>.
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/// </summary>
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/// <param name="extension">The extension to discover</param>
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/// <returns>The <see cref="IImageFormat"/> if found otherwise null</returns>
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public IImageFormat FindFormatByFileExtension(string extension) |
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{ |
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return this.imageFormats.FirstOrDefault(x => x.FileExtensions.Contains(extension, StringComparer.OrdinalIgnoreCase)); |
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} |
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/// <summary>
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/// For the specified mime type find the <see cref="IImageFormat"/>.
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/// </summary>
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/// <param name="mimeType">The mime-type to discover</param>
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/// <returns>The <see cref="IImageFormat"/> if found; otherwise null</returns>
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public IImageFormat FindFormatByMimeType(string mimeType) |
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{ |
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return this.imageFormats.FirstOrDefault(x => x.MimeTypes.Contains(mimeType, StringComparer.OrdinalIgnoreCase)); |
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} |
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/// <summary>
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/// Sets a specific image encoder as the encoder for a specific image format.
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/// </summary>
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/// <param name="imageFormat">The image format to register the encoder for.</param>
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/// <param name="encoder">The encoder to use,</param>
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public void SetEncoder(IImageFormat imageFormat, IImageEncoder encoder) |
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{ |
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Guard.NotNull(imageFormat, nameof(imageFormat)); |
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Guard.NotNull(encoder, nameof(encoder)); |
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this.AddImageFormat(imageFormat); |
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this.mimeTypeEncoders.AddOrUpdate(imageFormat, encoder, (s, e) => encoder); |
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} |
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/// <summary>
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/// Sets a specific image decoder as the decoder for a specific image format.
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/// </summary>
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/// <param name="imageFormat">The image format to register the encoder for.</param>
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/// <param name="decoder">The decoder to use,</param>
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public void SetDecoder(IImageFormat imageFormat, IImageDecoder decoder) |
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{ |
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Guard.NotNull(imageFormat, nameof(imageFormat)); |
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Guard.NotNull(decoder, nameof(decoder)); |
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this.AddImageFormat(imageFormat); |
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this.mimeTypeDecoders.AddOrUpdate(imageFormat, decoder, (s, e) => decoder); |
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} |
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/// <summary>
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/// Removes all the registered image format detectors.
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/// </summary>
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public void ClearImageFormatDetectors() |
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{ |
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this.imageFormatDetectors = new ConcurrentBag<IImageFormatDetector>(); |
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} |
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/// <summary>
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/// Adds a new detector for detecting mime types.
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/// </summary>
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/// <param name="detector">The detector to add</param>
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public void AddImageFormatDetector(IImageFormatDetector detector) |
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{ |
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Guard.NotNull(detector, nameof(detector)); |
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this.imageFormatDetectors.Add(detector); |
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this.SetMaxHeaderSize(); |
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} |
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/// <summary>
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/// For the specified mime type find the decoder.
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/// </summary>
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/// <param name="format">The format to discover</param>
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/// <returns>The <see cref="IImageDecoder"/> if found otherwise null</returns>
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public IImageDecoder FindDecoder(IImageFormat format) |
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{ |
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Guard.NotNull(format, nameof(format)); |
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if (this.mimeTypeDecoders.TryGetValue(format, out IImageDecoder decoder)) |
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{ |
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return decoder; |
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} |
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return null; |
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} |
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/// <summary>
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/// For the specified mime type find the encoder.
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/// </summary>
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/// <param name="format">The format to discover</param>
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/// <returns>The <see cref="IImageEncoder"/> if found otherwise null</returns>
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public IImageEncoder FindEncoder(IImageFormat format) |
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{ |
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Guard.NotNull(format, nameof(format)); |
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if (this.mimeTypeEncoders.TryGetValue(format, out IImageEncoder encoder)) |
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{ |
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return encoder; |
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} |
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return null; |
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} |
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/// <summary>
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/// Sets the max header size.
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/// </summary>
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private void SetMaxHeaderSize() |
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{ |
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this.MaxHeaderSize = this.imageFormatDetectors.Max(x => x.HeaderSize); |
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} |
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} |
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} |
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