WPF解析TTF 字体

偶遇需要自己解析 TTF 字体并显示，此做。。。

using System;
using System.Collections.Generic;
using System.Drawing.Text;
using System.IO;
using System.Linq;
using System.Runtime.Serialization;
using System.Text;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;namespace Helper.JilyData
{public class TTFInfo{public FileInfo TTFFileInfo { get; private set; }private GlyphTypeface GlyphTypeface { get; set; }public Size Bounds { get; private set; }public string ErrorMessage { get; private set; }public TTFInfo(string file){this.TTFFileInfo = new FileInfo(file);this.GlyphTypeface = new GlyphTypeface(new Uri(file, UriKind.Absolute));}public TTFInfo(FontFamily fontFamily, FontStyle fontStyle, FontWeight fontWeight, FontStretch fontStretch){this.TTFFileInfo = null;Typeface typeface = new Typeface(fontFamily, fontStyle, fontWeight, fontStretch);GlyphTypeface glyphTypeface = null;if (typeface.TryGetGlyphTypeface(out glyphTypeface)){this.GlyphTypeface = glyphTypeface;}if (this.GlyphTypeface == null){var missfont = Application.Current.MainWindow.FontFamily;typeface = new Typeface(missfont, fontStyle, fontWeight, fontStretch);if (typeface.TryGetGlyphTypeface(out glyphTypeface)){this.GlyphTypeface = glyphTypeface;}this.ErrorMessage = "当前系统无此字体";}}public ImageSource GetStrImage(string str, double fontsize, Brush foreBrush = null){if (str != null){var strs = ConverterText(str);if (str.Length > 0 && this.GlyphTypeface != null){DrawingGroup dg = new DrawingGroup();double width = 1;double height = 1;foreach (var text in strs){var glyphIndexes = new ushort[text.Length];var advanceWidths = new double[text.Length];for (int n = 0; n < text.Length; n++){var glyphIndex = this.GlyphTypeface.CharacterToGlyphMap[text[n]];glyphIndexes[n] = glyphIndex;advanceWidths[n] = this.GlyphTypeface.AdvanceWidths[glyphIndex] * 1.0;}var gr = new GlyphRun(this.GlyphTypeface, 0, false, 1.0, glyphIndexes, new Point(0, 0), advanceWidths, null, null, null, null, null, null);var glyphRunDrawing = new GlyphRunDrawing(foreBrush ?? Brushes.White, gr);var w = glyphRunDrawing.Bounds.Width * fontsize;var h = glyphRunDrawing.Bounds.Height * fontsize;ImageDrawing dring = new ImageDrawing(new DrawingImage(glyphRunDrawing), new Rect(new Point(0, height), new Size(w, h)));dg.Children.Add(dring);width += w;height += h;}Bounds = new Size(width, height);return new DrawingImage(dg);}}return null;}public List<string> ConverterText(string text){var t = text.Replace("&amp;", "&");t = t.Replace("\t", "   ");return t.Split(new string[] { "\r\n" }, StringSplitOptions.None).ToList();}}
}