mirror of https://github.com/SixLabors/ImageSharp
Browse Source
Code is an absolute mess just now. Former-commit-id: 10e1e7f8b6806b1a83d1a54ae7d685e3d590cffcpull/17/head
James South
12 years ago
12 changed files with 788 additions and 76 deletions
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// --------------------------------------------------------------------------------------------------------------------
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// <copyright file="GifEncoder - Copy.cs" company="James South">
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// Copyright (c) James South.
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// Licensed under the Apache License, Version 2.0.
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// </copyright>
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// --------------------------------------------------------------------------------------------------------------------
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namespace ImageProcessor.Imaging |
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{ |
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#region
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using System; |
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using System.Drawing; |
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using System.Drawing.Imaging; |
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using System.IO; |
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using System.Linq; |
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#endregion
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/// <summary>
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/// Encodes multiple images as an animated gif to a stream.
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/// <remarks>
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/// Always wire this up in a using block.
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/// Disposing the encoder will complete the file.
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/// Uses default .NET GIF encoding and adds animation headers.
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/// </remarks>
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/// </summary>
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/// <summary>
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/// Encodes multiple images as an animated gif to a stream. <br />
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/// ALWAYS ALWAYS ALWAYS wire this up in a using block <br />
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/// Disposing the encoder will complete the file. <br />
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/// Uses default .net GIF encoding and adds animation headers.
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/// </summary>
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public class GifEncoder2 : IDisposable |
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{ |
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#region Constants
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/// <summary>
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/// The application block size.
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/// </summary>
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private const byte ApplicationBlockSize = 0x0b; |
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/// <summary>
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/// The application extension block identifier.
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/// </summary>
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private const int ApplicationExtensionBlockIdentifier = 0xff21; |
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/// <summary>
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/// The application identification.
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/// </summary>
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private const string ApplicationIdentification = "NETSCAPE2.0"; |
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/// <summary>
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/// The file trailer.
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/// </summary>
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private const byte FileTrailer = 0x3b; |
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/// <summary>
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/// The file type.
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/// </summary>
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private const string FileType = "GIF"; |
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/// <summary>
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/// The file version.
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/// </summary>
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private const string FileVersion = "89a"; |
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/// <summary>
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/// The graphic control extension block identifier.
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/// </summary>
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private const int GraphicControlExtensionBlockIdentifier = 0xf921; |
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/// <summary>
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/// The graphic control extension block size.
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/// </summary>
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private const byte GraphicControlExtensionBlockSize = 0x04; |
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/// <summary>
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/// The source color block length.
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/// </summary>
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private const long SourceColorBlockLength = 768; |
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/// <summary>
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/// The source color block position.
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/// </summary>
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private const long SourceColorBlockPosition = 13; |
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/// <summary>
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/// The source global color info position.
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/// </summary>
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private const long SourceGlobalColorInfoPosition = 10; |
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/// <summary>
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/// The source graphic control extension length.
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/// </summary>
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private const long SourceGraphicControlExtensionLength = 8; |
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/// <summary>
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/// The source graphic control extension position.
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/// </summary>
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private const long SourceGraphicControlExtensionPosition = 781; |
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/// <summary>
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/// The source image block header length.
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/// </summary>
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private const long SourceImageBlockHeaderLength = 11; |
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/// <summary>
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/// The source image block position.
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/// </summary>
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private const long SourceImageBlockPosition = 789; |
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#endregion
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#region Fields
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/// <summary>
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/// The _stream.
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/// </summary>
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private readonly Stream _stream; |
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/// <summary>
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/// The _height.
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/// </summary>
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private int? _height; |
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/// <summary>
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/// The _is first image.
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/// </summary>
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private bool _isFirstImage = true; |
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/// <summary>
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/// The _repeat count.
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/// </summary>
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private int? _repeatCount; |
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/// <summary>
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/// The _width.
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/// </summary>
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private int? _width; |
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#endregion
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#region Constructors and Destructors
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/// <summary>
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/// Initializes a new instance of the <see cref="GifEncoder2"/> class.
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/// Encodes multiple images as an animated gif to a stream. <br/>
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/// ALWAYS ALWAYS ALWAYS wire this in a using block <br/>
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/// Disposing the encoder will complete the file. <br/>
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/// Uses default .net GIF encoding and adds animation headers.
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/// </summary>
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/// <param name="stream">
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/// The stream that will be written to.
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/// </param>
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/// <param name="width">
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/// Sets the width for this gif or null to use the first frame's width.
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/// </param>
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/// <param name="height">
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/// Sets the height for this gif or null to use the first frame's height.
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/// </param>
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/// <param name="repeatCount">
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/// The repeat Count.
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/// </param>
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public GifEncoder2(Stream stream, int? width = null, int? height = null, int? repeatCount = null) |
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{ |
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this._stream = stream; |
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this._width = width; |
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this._height = height; |
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this._repeatCount = repeatCount; |
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} |
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#endregion
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#region Public Properties
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/// <summary>
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/// Gets or sets the frame delay.
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/// </summary>
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public TimeSpan FrameDelay { get; set; } |
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#endregion
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#region Public Methods and Operators
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/// <summary>
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/// Adds a frame to this animation.
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/// </summary>
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/// <param name="img">
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/// The image to add
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/// </param>
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/// <param name="x">
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/// The positioning x offset this image should be displayed at.
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/// </param>
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/// <param name="y">
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/// The positioning y offset this image should be displayed at.
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/// </param>
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/// <param name="frameDelay">
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/// The frame Delay.
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/// </param>
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public void AddFrame(Image img, int x = 0, int y = 0, TimeSpan? frameDelay = null) |
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{ |
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using (var gifStream = new MemoryStream()) |
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{ |
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img.Save(gifStream, ImageFormat.Gif); |
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if (this._isFirstImage) |
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{ |
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// Steal the global color table info
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this.InitHeader(gifStream, img.Width, img.Height); |
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} |
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this.WriteGraphicControlBlock(gifStream, frameDelay.GetValueOrDefault(this.FrameDelay)); |
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this.WriteImageBlock(gifStream, !this._isFirstImage, x, y, img.Width, img.Height); |
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} |
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this._isFirstImage = false; |
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} |
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/// <summary>
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/// The dispose.
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/// </summary>
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public void Dispose() |
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{ |
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// Complete Application Block
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this.WriteByte(0); |
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// Complete File
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this.WriteByte(FileTrailer); |
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// Pushing data
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this._stream.Flush(); |
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} |
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#endregion
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#region Methods
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/// <summary>
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/// The init header.
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/// </summary>
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/// <param name="sourceGif">
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/// The source gif.
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/// </param>
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/// <param name="w">
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/// The w.
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/// </param>
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/// <param name="h">
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/// The h.
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/// </param>
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private void InitHeader(Stream sourceGif, int w, int h) |
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{ |
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// File Header
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this.WriteString(FileType); |
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this.WriteString(FileVersion); |
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this.WriteShort(this._width.GetValueOrDefault(w)); // Initial Logical Width
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this.WriteShort(this._height.GetValueOrDefault(h)); // Initial Logical Height
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sourceGif.Position = SourceGlobalColorInfoPosition; |
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this.WriteByte(sourceGif.ReadByte()); // Global Color Table Info
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this.WriteByte(0); // Background Color Index
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this.WriteByte(0); // Pixel aspect ratio
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this.WriteColorTable(sourceGif); |
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// App Extension Header
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this.WriteShort(ApplicationExtensionBlockIdentifier); |
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this.WriteByte(ApplicationBlockSize); |
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this.WriteString(ApplicationIdentification); |
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this.WriteByte(3); // Application block length
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this.WriteByte(1); |
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this.WriteShort(this._repeatCount.GetValueOrDefault(0)); // Repeat count for images.
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this.WriteByte(0); // terminator
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} |
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/// <summary>
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/// The write byte.
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/// </summary>
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/// <param name="value">
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/// The value.
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/// </param>
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private void WriteByte(int value) |
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{ |
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this._stream.WriteByte(Convert.ToByte(value)); |
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} |
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/// <summary>
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/// The write color table.
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/// </summary>
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/// <param name="sourceGif">
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/// The source gif.
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/// </param>
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private void WriteColorTable(Stream sourceGif) |
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{ |
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sourceGif.Position = SourceColorBlockPosition; // Locating the image color table
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var colorTable = new byte[SourceColorBlockLength]; |
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sourceGif.Read(colorTable, 0, colorTable.Length); |
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this._stream.Write(colorTable, 0, colorTable.Length); |
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} |
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/// <summary>
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/// The write graphic control block.
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/// </summary>
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/// <param name="sourceGif">
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/// The source gif.
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/// </param>
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/// <param name="frameDelay">
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/// The frame delay.
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/// </param>
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private void WriteGraphicControlBlock(Stream sourceGif, TimeSpan frameDelay) |
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{ |
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sourceGif.Position = SourceGraphicControlExtensionPosition; // Locating the source GCE
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var blockhead = new byte[SourceGraphicControlExtensionLength]; |
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sourceGif.Read(blockhead, 0, blockhead.Length); // Reading source GCE
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this.WriteShort(GraphicControlExtensionBlockIdentifier); // Identifier
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this.WriteByte(GraphicControlExtensionBlockSize); // Block Size
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this.WriteByte(blockhead[3] & 0xf7 | 0x08); // Setting disposal flag
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this.WriteShort(Convert.ToInt32(frameDelay.TotalMilliseconds / 10)); // Setting frame delay
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this.WriteByte(blockhead[6]); // Transparent color index
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this.WriteByte(0); // Terminator
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} |
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/// <summary>
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/// The write image block.
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/// </summary>
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/// <param name="sourceGif">
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/// The source gif.
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/// </param>
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/// <param name="includeColorTable">
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/// The include color table.
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/// </param>
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/// <param name="x">
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/// The x.
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/// </param>
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/// <param name="y">
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/// The y.
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/// </param>
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/// <param name="h">
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/// The h.
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/// </param>
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/// <param name="w">
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/// The w.
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/// </param>
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private void WriteImageBlock(Stream sourceGif, bool includeColorTable, int x, int y, int h, int w) |
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{ |
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sourceGif.Position = SourceImageBlockPosition; // Locating the image block
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var header = new byte[SourceImageBlockHeaderLength]; |
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sourceGif.Read(header, 0, header.Length); |
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this.WriteByte(header[0]); // Separator
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this.WriteShort(x); // Position X
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this.WriteShort(y); // Position Y
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this.WriteShort(h); // Height
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this.WriteShort(w); // Width
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if (includeColorTable) |
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{ |
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// If first frame, use global color table - else use local
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sourceGif.Position = SourceGlobalColorInfoPosition; |
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this.WriteByte(sourceGif.ReadByte() & 0x3f | 0x80); // Enabling local color table
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this.WriteColorTable(sourceGif); |
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} |
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else |
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{ |
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this.WriteByte(header[9] & 0x07 | 0x07); // Disabling local color table
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} |
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this.WriteByte(header[10]); // LZW Min Code Size
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// Read/Write image data
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sourceGif.Position = SourceImageBlockPosition + SourceImageBlockHeaderLength; |
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int dataLength = sourceGif.ReadByte(); |
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while (dataLength > 0) |
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{ |
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var imgData = new byte[dataLength]; |
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sourceGif.Read(imgData, 0, dataLength); |
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this._stream.WriteByte(Convert.ToByte(dataLength)); |
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this._stream.Write(imgData, 0, dataLength); |
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dataLength = sourceGif.ReadByte(); |
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} |
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this._stream.WriteByte(0); // Terminator
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} |
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/// <summary>
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/// The write short.
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/// </summary>
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/// <param name="value">
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/// The value.
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/// </param>
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private void WriteShort(int value) |
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{ |
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this._stream.WriteByte(Convert.ToByte(value & 0xff)); |
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this._stream.WriteByte(Convert.ToByte((value >> 8) & 0xff)); |
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} |
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/// <summary>
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/// The write string.
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/// </summary>
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/// <param name="value">
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/// The value.
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/// </param>
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private void WriteString(string value) |
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{ |
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this._stream.Write(value.ToArray().Select(c => (byte)c).ToArray(), 0, value.Length); |
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} |
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#endregion
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} |
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} |
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<?xml version="1.0" encoding="utf-8" ?> |
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<configuration> |
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<startup> |
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<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.1" /> |
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</startup> |
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</configuration> |
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<?xml version="1.0" encoding="utf-8"?> |
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<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> |
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<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" /> |
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<PropertyGroup> |
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<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> |
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<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform> |
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<ProjectGuid>{7BF5274B-56A7-4B62-8105-E9BDF25BAFE7}</ProjectGuid> |
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<OutputType>Exe</OutputType> |
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<AppDesignerFolder>Properties</AppDesignerFolder> |
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<RootNamespace>ImageProcessorConsole</RootNamespace> |
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<AssemblyName>ImageProcessorConsole</AssemblyName> |
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<TargetFrameworkVersion>v4.5.1</TargetFrameworkVersion> |
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<FileAlignment>512</FileAlignment> |
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<AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects> |
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</PropertyGroup> |
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> |
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<PlatformTarget>AnyCPU</PlatformTarget> |
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<DebugSymbols>true</DebugSymbols> |
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<DebugType>full</DebugType> |
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<Optimize>false</Optimize> |
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<OutputPath>bin\Debug\</OutputPath> |
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<DefineConstants>DEBUG;TRACE</DefineConstants> |
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<ErrorReport>prompt</ErrorReport> |
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<WarningLevel>4</WarningLevel> |
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</PropertyGroup> |
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' "> |
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<PlatformTarget>AnyCPU</PlatformTarget> |
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<DebugType>pdbonly</DebugType> |
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<Optimize>true</Optimize> |
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<OutputPath>bin\Release\</OutputPath> |
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<DefineConstants>TRACE</DefineConstants> |
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<ErrorReport>prompt</ErrorReport> |
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<WarningLevel>4</WarningLevel> |
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</PropertyGroup> |
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<ItemGroup> |
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<Reference Include="System" /> |
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<Reference Include="System.Core" /> |
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<Reference Include="System.Drawing" /> |
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<Reference Include="System.Xml.Linq" /> |
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<Reference Include="System.Data.DataSetExtensions" /> |
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<Reference Include="Microsoft.CSharp" /> |
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<Reference Include="System.Data" /> |
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<Reference Include="System.Xml" /> |
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</ItemGroup> |
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<ItemGroup> |
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<Compile Include="Program.cs" /> |
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<Compile Include="Properties\AssemblyInfo.cs" /> |
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</ItemGroup> |
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<ItemGroup> |
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<None Include="App.config" /> |
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</ItemGroup> |
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<ItemGroup> |
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<ProjectReference Include="..\ImageProcessor\ImageProcessor.csproj"> |
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<Project>{3b5dd734-fb7a-487d-8ce6-55e7af9aea7e}</Project> |
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<Name>ImageProcessor</Name> |
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</ProjectReference> |
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</ItemGroup> |
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<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" /> |
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<!-- To modify your build process, add your task inside one of the targets below and uncomment it. |
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Other similar extension points exist, see Microsoft.Common.targets. |
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<Target Name="BeforeBuild"> |
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</Target> |
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<Target Name="AfterBuild"> |
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</Target> |
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--> |
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</Project> |
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using System; |
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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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using System.Threading.Tasks; |
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namespace ImageProcessorConsole |
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{ |
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using System.Drawing; |
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using System.Drawing.Imaging; |
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using System.IO; |
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using ImageProcessor; |
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class Program |
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{ |
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static void Main(string[] args) |
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{ |
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string path = new Uri(System.Reflection.Assembly.GetExecutingAssembly().CodeBase).LocalPath; |
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// ReSharper disable once AssignNullToNotNullAttribute
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string resolvedPath = Path.Combine(Path.GetDirectoryName(path), "images"); |
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DirectoryInfo di = new DirectoryInfo(resolvedPath); |
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if (!di.Exists) |
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{ |
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di.Create(); |
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} |
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FileInfo[] files = di.GetFiles("*.gif"); |
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foreach (FileInfo fileInfo in files) |
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{ |
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byte[] photoBytes = File.ReadAllBytes(fileInfo.FullName); |
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|
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// ImageProcessor
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using (MemoryStream inStream = new MemoryStream(photoBytes)) |
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{ |
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using (ImageFactory imageFactory = new ImageFactory()) |
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{ |
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Size size = new Size(150, 150); |
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ImageFormat format = ImageFormat.Gif; |
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// Load, resize, set the format and quality and save an image.
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imageFactory.Load(inStream) |
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.Constrain(size) |
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.Format(format) |
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.Save(Path.Combine(Path.GetDirectoryName(path), "output", fileInfo.Name)); |
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} |
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} |
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} |
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} |
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} |
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} |
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@ -0,0 +1,36 @@ |
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using System.Reflection; |
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using System.Runtime.CompilerServices; |
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using System.Runtime.InteropServices; |
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|
|||
// General Information about an assembly is controlled through the following
|
|||
// set of attributes. Change these attribute values to modify the information
|
|||
// associated with an assembly.
|
|||
[assembly: AssemblyTitle("ImageProcessorConsole")] |
|||
[assembly: AssemblyDescription("")] |
|||
[assembly: AssemblyConfiguration("")] |
|||
[assembly: AssemblyCompany("")] |
|||
[assembly: AssemblyProduct("ImageProcessorConsole")] |
|||
[assembly: AssemblyCopyright("Copyright © 2014")] |
|||
[assembly: AssemblyTrademark("")] |
|||
[assembly: AssemblyCulture("")] |
|||
|
|||
// Setting ComVisible to false makes the types in this assembly not visible
|
|||
// to COM components. If you need to access a type in this assembly from
|
|||
// COM, set the ComVisible attribute to true on that type.
|
|||
[assembly: ComVisible(false)] |
|||
|
|||
// The following GUID is for the ID of the typelib if this project is exposed to COM
|
|||
[assembly: Guid("ac215639-6e27-4b9c-9ebb-9116c7a5d8a6")] |
|||
|
|||
// Version information for an assembly consists of the following four values:
|
|||
//
|
|||
// Major Version
|
|||
// Minor Version
|
|||
// Build Number
|
|||
// Revision
|
|||
//
|
|||
// You can specify all the values or you can default the Build and Revision Numbers
|
|||
// by using the '*' as shown below:
|
|||
// [assembly: AssemblyVersion("1.0.*")]
|
|||
[assembly: AssemblyVersion("1.0.0.0")] |
|||
[assembly: AssemblyFileVersion("1.0.0.0")] |
|||
Loading…
Reference in new issue