void LoadFontFile(string fileName)
{
CTFont nativeFont;
var dpiSize = 0;
var ext = Path.GetExtension(fileName);
if (!String.IsNullOrEmpty(ext))
{
if (nativeFontDescriptors == null)
nativeFontDescriptors = new Dictionary<string, CTFontDescriptor> ();
//Try loading from Bundle first
var fontName = fileName.Substring (0, fileName.Length - ext.Length);
var pathForResource = NSBundle.MainBundle.PathForResource (fontName, ext.Substring(1));
NSUrl url;
if (!string.IsNullOrEmpty(pathForResource))
url = NSUrl.FromFilename (pathForResource);
else
url = NSUrl.FromFilename (fileName);
// We will not use CTFontManager.RegisterFontsForUrl (url, CTFontManagerScope.Process);
// here. The reason is that there is no way we can be sure that the font can be created to
// to identify the family name afterwards. So instead we will create a CGFont from a data provider.
// create CTFont to obtain the CTFontDescriptor, store family name and font descriptor to be accessed
// later.
try {
var dataProvider = new CGDataProvider (url.Path);
var cgFont = CGFont.CreateFromProvider (dataProvider);
try {
nativeFont = new CTFont(cgFont, dpiSize, null);
if (!nativeFontDescriptors.ContainsKey(nativeFont.FamilyName))
{
nativeFontDescriptors.Add(nativeFont.FamilyName, nativeFont.GetFontDescriptor());
NSError error;
var registered = CTFontManager.RegisterGraphicsFont(cgFont, out error);
if (!registered)
{
// If the error code is 105 then the font we are trying to register is already registered
// We will not report this as an error.
if (error.Code != 105)
throw new ArgumentException("Error registering: " + Path.GetFileName(fileName));
}
}
}
catch
{
// note: MS throw the same exception FileNotFoundException if the file exists but isn't a valid font file
throw new System.IO.FileNotFoundException (fileName);
}
}
catch (Exception)
{
// note: MS throw the same exception FileNotFoundException if the file exists but isn't a valid font file
throw new System.IO.FileNotFoundException (fileName);
}
}
}
