mirror of https://github.com/SixLabors/ImageSharp
James South
12 years ago
22 changed files with 295 additions and 202 deletions
@ -1,6 +1,6 @@ |
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<?xml version="1.0" encoding="utf-8"?> |
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<packages> |
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<package id="Microsoft.Bcl" version="1.1.8" targetFramework="net40" /> |
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<package id="Microsoft.Bcl" version="1.1.9" targetFramework="net40" /> |
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<package id="Microsoft.Bcl.Async" version="1.0.168" targetFramework="net40" /> |
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<package id="Microsoft.Bcl.Build" version="1.0.14" targetFramework="net40" /> |
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</packages> |
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// --------------------------------------------------------------------------------------------------------------------
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// <copyright file="AutoRotate.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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// <summary>
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// Performs auto-rotation to ensure that EXIF defined rotation is reflected in
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// the final image.
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// </summary>
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// --------------------------------------------------------------------------------------------------------------------
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namespace ImageProcessor.Processors |
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{ |
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using System.Collections.Generic; |
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using System.Drawing; |
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using System.Text.RegularExpressions; |
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using ImageProcessor.Imaging; |
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/// <summary>
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/// Performs auto-rotation to ensure that EXIF defined rotation is reflected in
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/// the final image.
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/// </summary>
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public class AutoRotate : IGraphicsProcessor |
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{ |
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/// <summary>
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/// The regular expression to search strings for.
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/// </summary>
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private static readonly Regex QueryRegex = new Regex(@"autorotate=true", RegexOptions.Compiled); |
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/// <summary>
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/// Gets the regular expression to search strings for.
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/// </summary>
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public Regex RegexPattern |
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{ |
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get |
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{ |
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return QueryRegex; |
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} |
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} |
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/// <summary>
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/// Gets or sets DynamicParameter.
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/// </summary>
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public dynamic DynamicParameter |
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{ |
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get; |
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set; |
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} |
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/// <summary>
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/// Gets the order in which this processor is to be used in a chain.
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/// </summary>
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public int SortOrder |
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{ |
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get; |
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private set; |
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} |
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/// <summary>
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/// Gets or sets any additional settings required by the processor.
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/// </summary>
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public Dictionary<string, string> Settings |
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{ |
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get; |
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set; |
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} |
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/// <summary>
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/// The position in the original string where the first character of the captured substring was found.
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/// </summary>
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/// <param name="queryString">
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/// The query string to search.
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/// </param>
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/// <returns>
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/// The zero-based starting position in the original string where the captured substring was found.
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/// </returns>
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public int MatchRegexIndex(string queryString) |
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{ |
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int index = 0; |
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// Set the sort order to max to allow filtering.
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this.SortOrder = int.MaxValue; |
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foreach (Match match in this.RegexPattern.Matches(queryString)) |
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{ |
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if (match.Success) |
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{ |
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if (index == 0) |
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{ |
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// Set the index on the first instance only.
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this.SortOrder = match.Index; |
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} |
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index += 1; |
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} |
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} |
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return this.SortOrder; |
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} |
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/// <summary>
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/// Processes the image.
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/// </summary>
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/// <param name="factory">The the current instance of the
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/// <see cref="T:ImageProcessor.ImageFactory" /> class containing
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/// the image to process.</param>
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/// <returns>
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/// The processed image from the current instance of the <see cref="T:ImageProcessor.ImageFactory" /> class.
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/// </returns>
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public Image ProcessImage(ImageFactory factory) |
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{ |
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Bitmap newImage = null; |
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Image image = factory.Image; |
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try |
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{ |
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const int Orientation = (int)ExifPropertyTag.Orientation; |
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if (!factory.PreserveExifData && factory.ExifPropertyItems.ContainsKey(Orientation)) |
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{ |
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newImage = new Bitmap(image); |
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int rotationValue = factory.ExifPropertyItems[Orientation].Value[0]; |
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switch (rotationValue) |
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{ |
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case 1: // Landscape, do nothing
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break; |
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case 8: // Rotated 90 right
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// De-rotate:
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newImage.RotateFlip(RotateFlipType.Rotate270FlipNone); |
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break; |
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case 3: // Bottoms up
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newImage.RotateFlip(RotateFlipType.Rotate180FlipNone); |
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break; |
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case 6: // Rotated 90 left
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newImage.RotateFlip(RotateFlipType.Rotate90FlipNone); |
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break; |
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} |
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// Reassign the image.
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image.Dispose(); |
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image = newImage; |
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} |
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} |
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catch |
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{ |
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if (newImage != null) |
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{ |
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newImage.Dispose(); |
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} |
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} |
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return image; |
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} |
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} |
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} |
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@ -0,0 +1 @@ |
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406a6a7916628c0c0bea8243565a7162ebd5a505 |
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@ -1,6 +1,6 @@ |
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<?xml version="1.0" encoding="utf-8"?> |
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<packages> |
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<package id="Microsoft.Bcl" version="1.1.8" targetFramework="net40" /> |
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<package id="Microsoft.Bcl" version="1.1.9" targetFramework="net40" /> |
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<package id="Microsoft.Bcl.Async" version="1.0.168" targetFramework="net40" /> |
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<package id="Microsoft.Bcl.Build" version="1.0.14" targetFramework="net40" /> |
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</packages> |
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