mirror of https://github.com/SixLabors/ImageSharp
James South
12 years ago
14 changed files with 248 additions and 8 deletions
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// --------------------------------------------------------------------------------------------------------------------
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// <copyright file="Tint.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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// Tints an image with the given colour.
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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; |
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using System.Collections.Generic; |
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using System.Drawing; |
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using System.Drawing.Drawing2D; |
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using System.Drawing.Imaging; |
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using System.Text.RegularExpressions; |
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using ImageProcessor.Extensions; |
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/// <summary>
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/// Tints an image with the given colour.
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/// </summary>
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public class Tint : 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(@"tint=(\d+,\d+,\d+,\d+|([0-9a-fA-F]{3}){1,2})", RegexOptions.Compiled); |
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#region IGraphicsProcessor Members
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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 { return QueryRegex; } |
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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 { get; set; } |
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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 { get; private set; } |
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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 { get; set; } |
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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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this.DynamicParameter = this.ParseColor(match.Value); |
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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">
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/// The the current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class containing
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/// the image to process.
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/// </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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Color tintColour = (Color)this.DynamicParameter; |
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float[][] colorMatrixElements = |
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{ |
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new[] { tintColour.R / 255f, 0, 0, 0, 0 }, // Red
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new[] { 0, tintColour.G / 255f, 0, 0, 0 }, // Green
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new[] { 0, 0, tintColour.B / 255f, 0, 0 }, // Blue
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new[] { 0, 0, 0, tintColour.A / 255f, 0 }, // Alpha
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new float[] { 0, 0, 0, 0, 1 } |
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}; |
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ColorMatrix colorMatrix = new ColorMatrix(colorMatrixElements); |
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newImage = new Bitmap(image.Width, image.Height, PixelFormat.Format32bppPArgb); |
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using (Graphics graphics = Graphics.FromImage(newImage)) |
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{ |
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graphics.InterpolationMode = InterpolationMode.HighQualityBicubic; |
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graphics.PixelOffsetMode = PixelOffsetMode.HighQuality; |
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graphics.CompositingQuality = CompositingQuality.HighQuality; |
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using (ImageAttributes attributes = new ImageAttributes()) |
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{ |
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attributes.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap); |
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graphics.DrawImage(image, new Rectangle(0, 0, image.Width, image.Height), 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, attributes); |
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image.Dispose(); |
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image = newImage; |
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} |
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} |
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return image; |
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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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#endregion
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/// <summary>
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/// Returns the correct <see cref="T:System.Drawing.Color"/> for the given string.
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/// </summary>
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/// <param name="input">
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/// The input string containing the value to parse.
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/// </param>
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/// <returns>
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/// The correct <see cref="T:System.Drawing.Color"/>
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/// </returns>
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private Color ParseColor(string input) |
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{ |
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foreach (Match match in QueryRegex.Matches(input)) |
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{ |
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string value = match.Value.Split('=')[1]; |
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if (value.Contains(",")) |
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{ |
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int[] split = value.ToPositiveIntegerArray(); |
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byte red = split[0].ToByte(); |
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byte green = split[1].ToByte(); |
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byte blue = split[2].ToByte(); |
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byte alpha = split[3].ToByte(); |
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return Color.FromArgb(alpha, red, green, blue); |
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} |
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// Split on color-hex
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return ColorTranslator.FromHtml("#" + value); |
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} |
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return Color.Transparent; |
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} |
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} |
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} |
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7880376ac9108d4e74412efb31f544484079ce16 |
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17e154964bfb4da80c1e0aec623cd2486d493b47 |
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673e6c6d9223e0906fe342a17496168b8d9017fb |
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@ -0,0 +1 @@ |
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069f8472ed7b83ea57f4cf511f83396e1a0b8877 |
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