public static Font Load(TextReader reader)
{
var document = XDocument.Load(reader);
var fontNode = document.Root;
var font = new Font();
font.Name = fontNode.Attribute("name").Value;
font.Style = fontNode.Attribute("style").Value;
font.Version = fontNode.Attribute("version").Value;
foreach (var letterNode in fontNode.Elements("letter"))
{
var letter = new Letter();
letter.Character = (char)(int)letterNode.Attribute("code");
letter.Start = (double)letterNode.Attribute("start");
letter.End = (double)letterNode.Attribute("end");
letter.Vectors = new List<List<Vector3d>>();
foreach (var pathNode in letterNode.Elements("path"))
{
var path = new List<Vector3d>();
var lastX = (double)pathNode.Attribute("x");
var lastY = (double)pathNode.Attribute("y");
path.Add(new Vector3d(lastX, lastY, 0));
foreach (var toNode in pathNode.Elements("to"))
{
var toX = (double)toNode.Attribute("x");
var toY = (double)toNode.Attribute("y");
if (toNode.Attribute("b") == null)
{
path.Add(Vector3d.Zero);
}
else
{
var b = (double)toNode.Attribute("b");
var chordX = toX - lastX;
var chordY = toY - lastY;
var deltaOver2 = 2 * Math.Atan(b);
var cs = Math.Cos(deltaOver2);
var sn = Math.Sin(deltaOver2);
var tangentX = chordX * cs - chordY * sn;
var tangentY = chordX * sn + chordY * cs;
var tangent = new Vector3d(tangentX, tangentY, 0);
path.Add(tangent);
}
path.Add(new Vector3d(toX, toY, 0));
lastX = toX;
lastY = toY;
}
letter.Vectors.Add(path);
}
font.Letters.Add(letter);
}
return font;
}
public Typewriter(Font font)
{
Letters = font.Letters.ToDictionary(o => o.Character);
}
public static void Save(Stream stream, Font font)
{
var xml = new XElement("bbfont",
new XAttribute("name", font.Name),
new XAttribute("style", font.Style),
new XAttribute("version", font.Version),
LettersToXml(font.Letters));
var document = new XDocument(xml);
document.Save(stream);
}