mirror of https://github.com/SixLabors/ImageSharp
James Jackson-South
8 years ago
31 changed files with 399 additions and 325 deletions
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// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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using SixLabors.ImageSharp.MetaData; |
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using SixLabors.Primitives; |
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namespace SixLabors.ImageSharp.Formats.Bmp |
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{ |
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/// <summary>
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/// Contains information about the bmp including dimensions, pixel type information and additional metadata.
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/// </summary>
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public class BmpInfo : ImageInfo |
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{ |
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/// <summary>
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/// Initializes a new instance of the <see cref="BmpInfo" /> class.
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/// </summary>
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/// <param name="pixelType">The image pixel type information.</param>
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/// <param name="size">The size of the image in pixels.</param>
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/// <param name="metaData">The images metadata.</param>
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internal BmpInfo(PixelTypeInfo pixelType, Size size, ImageMetaData metaData) |
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: base(pixelType, size, metaData) |
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{ |
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} |
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} |
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} |
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// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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namespace SixLabors.ImageSharp.Formats.Gif |
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{ |
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/// <summary>
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/// Provides Gif specific metadata information for the image frame.
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/// </summary>
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public class GifFrameMetaData |
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{ |
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/// <summary>
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/// Gets or sets the length of the color table for paletted images.
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/// If not 0, then this field indicates the maximum number of colors to use when quantizing the
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/// image frame.
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/// </summary>
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public int ColorTableLength { get; set; } |
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/// <summary>
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/// Gets or sets the frame delay for animated images.
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/// If not 0, when utilized in Gif animation, this field specifies the number of hundredths (1/100) of a second to
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/// wait before continuing with the processing of the Data Stream.
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/// The clock starts ticking immediately after the graphic is rendered.
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/// </summary>
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public int FrameDelay { get; set; } |
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/// <summary>
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/// Gets or sets the disposal method for animated images.
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/// Primarily used in Gif animation, this field indicates the way in which the graphic is to
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/// be treated after being displayed.
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/// </summary>
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public GifDisposalMethod DisposalMethod { get; set; } |
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} |
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} |
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// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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using SixLabors.ImageSharp.MetaData; |
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using SixLabors.Primitives; |
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namespace SixLabors.ImageSharp.Formats.Gif |
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{ |
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/// <summary>
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/// Contains information about the bmp including dimensions, pixel type information and additional metadata.
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/// </summary>
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public class GifInfo : ImageInfo |
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{ |
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/// <summary>
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/// Initializes a new instance of the <see cref="GifInfo" /> class.
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/// </summary>
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/// <param name="colorTableMode">The color table mode.</param>
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/// <param name="pixelType">The image pixel type information.</param>
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/// <param name="size">The size of the image in pixels.</param>
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/// <param name="metaData">The images metadata.</param>
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internal GifInfo( |
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GifColorTableMode colorTableMode, |
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PixelTypeInfo pixelType, |
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Size size, |
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ImageMetaData metaData) |
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: base(pixelType, size, metaData) => this.ColorTableMode = colorTableMode; |
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/// <summary>
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/// Gets the color table mode.
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/// </summary>
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public GifColorTableMode ColorTableMode { get; } |
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} |
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} |
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// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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namespace SixLabors.ImageSharp.Formats.Gif |
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{ |
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/// <summary>
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/// Provides Gif specific metadata information for the image.
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/// </summary>
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public class GifMetaData |
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{ |
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/// <summary>
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/// Gets or sets the number of times any animation is repeated.
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/// <remarks>
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/// 0 means to repeat indefinitely, count is set as play n + 1 times
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/// </remarks>
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/// </summary>
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public ushort RepeatCount { get; set; } |
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/// <summary>
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/// Gets or sets the color table mode.
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/// </summary>
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public GifColorTableMode ColorTableMode { get; set; } |
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/// <summary>
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/// Gets or sets the length of the global color table if present.
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/// </summary>
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public int GlobalColorTableLength { get; set; } |
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} |
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} |
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// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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using SixLabors.ImageSharp.MetaData; |
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namespace SixLabors.ImageSharp.Formats.Gif |
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{ |
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/// <summary>
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/// Extension methods for storing meta data specific to Gif images.
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/// </summary>
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public static class GifMetaDataExtensions |
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{ |
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/// <summary>
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/// Adds or updates the Gif specific meta data to the image.
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/// </summary>
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/// <param name="meta">The image meta data.</param>
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/// <param name="value">The gif meta data.</param>
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public static void AddOrUpdateGifMetaData(this ImageMetaData meta, GifMetaData value) => meta.AddOrUpdateMetaData(GifConstants.MetaDataKey, value); |
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/// <summary>
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/// Gets the Gif format specific meta data from the image.
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/// </summary>
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/// <param name="meta">The image meta data.</param>
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/// <returns>The <see cref="GifMetaData"/> or null.</returns>
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public static GifMetaData GetGifMetaData(this ImageMetaData meta) |
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{ |
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meta.TryGetMetaData(GifConstants.MetaDataKey, out GifMetaData value); |
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return value; |
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} |
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/// <summary>
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/// Adds or updates the Gif specific meta data to the image frame.
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/// </summary>
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/// <param name="meta">The image meta data.</param>
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/// <param name="value">The gif meta data.</param>
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public static void AddOrUpdateGifFrameMetaData(this ImageFrameMetaData meta, GifFrameMetaData value) => meta.AddOrUpdateMetaData(GifConstants.MetaDataKey, value); |
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/// <summary>
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/// Gets the Gif format specific meta data from the image frame.
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/// </summary>
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/// <param name="meta">The image meta data.</param>
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/// <returns>The <see cref="GifMetaData"/> or null.</returns>
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public static GifFrameMetaData GetGifFrameMetaData(this ImageFrameMetaData meta) |
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{ |
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meta.TryGetMetaData(GifConstants.MetaDataKey, out GifFrameMetaData value); |
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return value; |
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} |
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} |
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} |
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// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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using System; |
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using System.Buffers.Binary; |
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namespace SixLabors.ImageSharp.Formats.Gif |
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{ |
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internal readonly struct GifNetscapeLoopingApplicationExtension : IGifExtension |
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{ |
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public GifNetscapeLoopingApplicationExtension(ushort repeatCount) => this.RepeatCount = repeatCount; |
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public byte Label => GifConstants.ApplicationExtensionLabel; |
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/// <summary>
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/// Gets the repeat count.
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/// 0 means loop indefinitely. Count is set as play n + 1 times.
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/// </summary>
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public ushort RepeatCount { get; } |
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public static GifNetscapeLoopingApplicationExtension Parse(ReadOnlySpan<byte> buffer) |
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{ |
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ushort repeatCount = BinaryPrimitives.ReadUInt16LittleEndian(buffer.Slice(0, 2)); |
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return new GifNetscapeLoopingApplicationExtension(repeatCount); |
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} |
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public int WriteTo(Span<byte> buffer) |
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{ |
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buffer[0] = GifConstants.ApplicationBlockSize; |
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// Write NETSCAPE2.0
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GifConstants.NetscapeApplicationIdentificationBytes.AsSpan().CopyTo(buffer.Slice(1, 11)); |
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// Application Data ----
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buffer[12] = 3; // Application block length (always 3)
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buffer[13] = 1; // Data sub-block indentity (always 1)
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// 0 means loop indefinitely. Count is set as play n + 1 times.
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BinaryPrimitives.WriteUInt16LittleEndian(buffer.Slice(14, 2), this.RepeatCount); |
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return 16; // Length - Introducer + Label + Terminator.
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} |
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} |
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} |
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// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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using SixLabors.ImageSharp.MetaData; |
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using SixLabors.Primitives; |
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namespace SixLabors.ImageSharp.Formats.Jpeg |
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{ |
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/// <summary>
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/// Contains information about the bmp including dimensions, pixel type information and additional metadata.
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/// </summary>
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public class JpegInfo : ImageInfo |
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{ |
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/// <summary>
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/// Initializes a new instance of the <see cref="JpegInfo" /> class.
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/// </summary>
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/// <param name="pixelType">The image pixel type information.</param>
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/// <param name="size">The size of the image in pixels.</param>
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/// <param name="metaData">The images metadata.</param>
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internal JpegInfo(PixelTypeInfo pixelType, Size size, ImageMetaData metaData) |
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: base(pixelType, size, metaData) |
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{ |
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} |
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} |
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} |
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// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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using SixLabors.ImageSharp.MetaData; |
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using SixLabors.Primitives; |
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namespace SixLabors.ImageSharp.Formats.Png |
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{ |
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/// <summary>
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/// Contains information about the bmp including dimensions, pixel type information and additional metadata.
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/// </summary>
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public class PngInfo : ImageInfo |
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{ |
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/// <summary>
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/// Initializes a new instance of the <see cref="PngInfo" /> class.
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/// </summary>
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/// <param name="pixelType">The image pixel type information.</param>
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/// <param name="size">The size of the image in pixels.</param>
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/// <param name="metaData">The images metadata.</param>
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internal PngInfo(PixelTypeInfo pixelType, Size size, ImageMetaData metaData) |
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: base(pixelType, size, metaData) |
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{ |
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} |
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} |
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} |
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// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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namespace SixLabors.ImageSharp.Formats.Gif |
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namespace SixLabors.ImageSharp.MetaData |
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{ |
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/// <summary>
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/// Enumerated frame process modes to apply to multi-frame images.
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