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@ -1,7 +1,7 @@ |
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// Copyright (c) Six Labors.
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// Licensed under the Six Labors Split License.
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#nullable disable |
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using System.Diagnostics.CodeAnalysis; |
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using SixLabors.ImageSharp.PixelFormats; |
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namespace SixLabors.ImageSharp.Metadata.Profiles.Exif; |
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@ -14,12 +14,12 @@ public sealed class ExifProfile : IDeepCloneable<ExifProfile> |
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/// <summary>
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/// The byte array to read the EXIF profile from.
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/// </summary>
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private readonly byte[] data; |
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private readonly byte[]? data; |
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/// <summary>
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/// The collection of EXIF values
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/// </summary>
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private List<IExifValue> values; |
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private List<IExifValue>? values; |
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/// <summary>
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/// The thumbnail offset position in the byte stream
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@ -35,7 +35,7 @@ public sealed class ExifProfile : IDeepCloneable<ExifProfile> |
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/// Initializes a new instance of the <see cref="ExifProfile"/> class.
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/// </summary>
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public ExifProfile() |
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: this((byte[])null) |
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: this((byte[]?)null) |
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{ |
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} |
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@ -43,7 +43,7 @@ public sealed class ExifProfile : IDeepCloneable<ExifProfile> |
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/// Initializes a new instance of the <see cref="ExifProfile"/> class.
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/// </summary>
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/// <param name="data">The byte array to read the EXIF profile from.</param>
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public ExifProfile(byte[] data) |
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public ExifProfile(byte[]? data) |
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{ |
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this.Parts = ExifParts.All; |
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this.data = data; |
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@ -78,7 +78,7 @@ public sealed class ExifProfile : IDeepCloneable<ExifProfile> |
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this.InvalidTags = other.InvalidTags.Count > 0 |
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? new List<ExifTag>(other.InvalidTags) |
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: (IReadOnlyList<ExifTag>)Array.Empty<ExifTag>(); |
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: Array.Empty<ExifTag>(); |
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if (other.values != null) |
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{ |
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@ -110,6 +110,7 @@ public sealed class ExifProfile : IDeepCloneable<ExifProfile> |
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/// <summary>
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/// Gets the values of this EXIF profile.
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/// </summary>
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[MemberNotNull(nameof(values))] |
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public IReadOnlyList<IExifValue> Values |
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{ |
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get |
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@ -122,36 +123,47 @@ public sealed class ExifProfile : IDeepCloneable<ExifProfile> |
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/// <summary>
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/// Returns the thumbnail in the EXIF profile when available.
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/// </summary>
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/// <param name="image">The thumbnail</param>
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/// <returns>
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/// The <see cref="Image"/>.
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/// True, if there is a thumbnail otherwise false.
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/// </returns>
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public Image CreateThumbnail() => this.CreateThumbnail<Rgba32>(); |
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public bool TryCreateThumbnail([NotNullWhen(true)] out Image? image) |
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{ |
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if (this.TryCreateThumbnail(out Image<Rgba32>? innerimage)) |
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{ |
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image = innerimage; |
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return true; |
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} |
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image = null; |
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return false; |
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} |
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/// <summary>
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/// Returns the thumbnail in the EXIF profile when available.
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/// </summary>
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/// <typeparam name="TPixel">The pixel format.</typeparam>
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/// <returns>
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/// The <see cref="Image{TPixel}"/>.
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/// </returns>
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public Image<TPixel> CreateThumbnail<TPixel>() |
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/// <param name="image">The thumbnail.</param>
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/// <returns>True, if there is a thumbnail otherwise false.</returns>
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public bool TryCreateThumbnail<TPixel>([NotNullWhen(true)] out Image<TPixel>? image) |
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where TPixel : unmanaged, IPixel<TPixel> |
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{ |
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this.InitializeValues(); |
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image = null; |
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if (this.thumbnailOffset == 0 || this.thumbnailLength == 0) |
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{ |
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return null; |
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return false; |
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} |
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if (this.data is null || this.data.Length < (this.thumbnailOffset + this.thumbnailLength)) |
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{ |
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return null; |
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return false; |
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} |
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using (var memStream = new MemoryStream(this.data, this.thumbnailOffset, this.thumbnailLength)) |
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using (MemoryStream memStream = new(this.data, this.thumbnailOffset, this.thumbnailLength)) |
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{ |
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return Image.Load<TPixel>(memStream); |
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image = Image.Load<TPixel>(memStream); |
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return true; |
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} |
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} |
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@ -159,12 +171,21 @@ public sealed class ExifProfile : IDeepCloneable<ExifProfile> |
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/// Returns the value with the specified tag.
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/// </summary>
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/// <param name="tag">The tag of the exif value.</param>
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/// <returns>The value with the specified tag.</returns>
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/// <param name="exifValue">The value with the specified tag.</param>
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/// <returns>True when found, otherwise false</returns>
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/// <typeparam name="TValueType">The data type of the tag.</typeparam>
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public IExifValue<TValueType> GetValue<TValueType>(ExifTag<TValueType> tag) |
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public bool TryGetValue<TValueType>(ExifTag<TValueType> tag, [NotNullWhen(true)] out IExifValue<TValueType>? exifValue) |
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{ |
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IExifValue value = this.GetValueInternal(tag); |
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return value is null ? null : (IExifValue<TValueType>)value; |
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IExifValue? value = this.GetValueInternal(tag); |
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if (value is null) |
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{ |
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exifValue = null; |
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return false; |
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} |
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exifValue = (IExifValue<TValueType>)value; |
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return true; |
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} |
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/// <summary>
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@ -203,7 +224,7 @@ public sealed class ExifProfile : IDeepCloneable<ExifProfile> |
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/// Converts this instance to a byte array.
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/// </summary>
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/// <returns>The <see cref="T:byte[]"/></returns>
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public byte[] ToByteArray() |
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public byte[]? ToByteArray() |
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{ |
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if (this.values is null) |
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{ |
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@ -215,19 +236,19 @@ public sealed class ExifProfile : IDeepCloneable<ExifProfile> |
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return Array.Empty<byte>(); |
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} |
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var writer = new ExifWriter(this.values, this.Parts); |
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ExifWriter writer = new(this.values, this.Parts); |
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return writer.GetData(); |
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} |
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/// <inheritdoc/>
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public ExifProfile DeepClone() => new ExifProfile(this); |
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public ExifProfile DeepClone() => new(this); |
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/// <summary>
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/// Returns the value with the specified tag.
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/// </summary>
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/// <param name="tag">The tag of the exif value.</param>
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/// <returns>The value with the specified tag.</returns>
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internal IExifValue GetValueInternal(ExifTag tag) |
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internal IExifValue? GetValueInternal(ExifTag tag) |
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{ |
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foreach (IExifValue exifValue in this.Values) |
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{ |
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@ -245,7 +266,8 @@ public sealed class ExifProfile : IDeepCloneable<ExifProfile> |
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/// </summary>
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/// <param name="tag">The tag of the exif value.</param>
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/// <param name="value">The value.</param>
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internal void SetValueInternal(ExifTag tag, object value) |
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/// <exception cref="NotSupportedException">Newly created value is null.</exception>
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internal void SetValueInternal(ExifTag tag, object? value) |
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{ |
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foreach (IExifValue exifValue in this.Values) |
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{ |
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@ -256,10 +278,10 @@ public sealed class ExifProfile : IDeepCloneable<ExifProfile> |
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} |
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} |
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ExifValue newExifValue = ExifValues.Create(tag); |
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ExifValue? newExifValue = ExifValues.Create(tag); |
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if (newExifValue is null) |
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{ |
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throw new NotSupportedException(); |
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throw new NotSupportedException($"Newly created value for tag {tag} is null."); |
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} |
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newExifValue.TrySetValue(value); |
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@ -278,9 +300,7 @@ public sealed class ExifProfile : IDeepCloneable<ExifProfile> |
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private void SyncResolution(ExifTag<Rational> tag, double resolution) |
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{ |
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IExifValue<Rational> value = this.GetValue(tag); |
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if (value is null) |
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if (!this.TryGetValue(tag, out IExifValue<Rational>? value)) |
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{ |
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return; |
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} |
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@ -290,10 +310,11 @@ public sealed class ExifProfile : IDeepCloneable<ExifProfile> |
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this.RemoveValue(value.Tag); |
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} |
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var newResolution = new Rational(resolution, false); |
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Rational newResolution = new(resolution, false); |
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this.SetValue(tag, newResolution); |
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} |
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[MemberNotNull(nameof(values))] |
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private void InitializeValues() |
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{ |
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if (this.values != null) |
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@ -307,13 +328,13 @@ public sealed class ExifProfile : IDeepCloneable<ExifProfile> |
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return; |
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} |
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var reader = new ExifReader(this.data); |
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ExifReader reader = new(this.data); |
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this.values = reader.ReadValues(); |
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this.InvalidTags = reader.InvalidTags.Count > 0 |
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? new List<ExifTag>(reader.InvalidTags) |
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: (IReadOnlyList<ExifTag>)Array.Empty<ExifTag>(); |
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: Array.Empty<ExifTag>(); |
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this.thumbnailOffset = (int)reader.ThumbnailOffset; |
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this.thumbnailLength = (int)reader.ThumbnailLength; |
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James Jackson-South
3 years ago
GitHub