public static Typeface ResolveTypefaceFromFile(this InstalledTypefaceCollection fontCollection, string filename)
{
//from user input typeface filename
bool enable_absPath = false; //enable abs path or not
#if DEBUG
enable_absPath = true;//in debug mode
#endif
//TODO: review here again!!!
if (!fontCollection._installedTypefacesByFilenames.TryGetValue(filename, out InstalledTypeface found))
{
if (!enable_absPath && Path.IsPathRooted(filename))
{
return(null);//***
}
//search for a file
if (File.Exists(filename))
{
//TODO: handle duplicated font!!
//try read this
InstalledTypeface instTypeface;
using (FileStream fs = new FileStream(filename, FileMode.Open))
{
OpenFontReader reader = new OpenFontReader();
Typeface typeface = reader.Read(fs);
//
OpenFont.Extensions.TypefaceExtensions.SetCustomTypefaceKey(
typeface,
TinyCRC32Calculator.CalculateCrc32(typeface.Name.ToUpper()));
instTypeface = new InstalledTypeface(typeface, filename);
fontCollection._installedTypefacesByFilenames.Add(filename, instTypeface);
return(instTypeface.ResolvedTypeface = typeface);//assign and return
}
}
}
else
{
//found inst type
return(ResolveTypeface(fontCollection, found));
}
return(null);
}
public static Typeface ResolveTypeface(this InstalledTypefaceCollection fontCollection, InstalledTypeface installedFont)
{
if (installedFont.ResolvedTypeface != null)
{
return(installedFont.ResolvedTypeface);
}
//load
Typeface typeface;
if (CustomFontStreamLoader != null)
{
using (var fontStream = CustomFontStreamLoader(installedFont.FontPath))
{
var reader = new OpenFontReader();
typeface = reader.Read(fontStream, installedFont.ActualStreamOffset);
typeface.Filename = installedFont.FontPath;
installedFont.ResolvedTypeface = typeface;//cache
}
}
else
{
using (var fs = new FileStream(installedFont.FontPath, FileMode.Open, FileAccess.Read))
{
var reader = new OpenFontReader();
typeface = reader.Read(fs, installedFont.ActualStreamOffset);
typeface.Filename = installedFont.FontPath;
installedFont.ResolvedTypeface = typeface;//cache
}
}
//calculate typeface key for the new create typeface
//custom key
OpenFont.Extensions.TypefaceExtensions.SetCustomTypefaceKey(
typeface,
TinyCRC32Calculator.CalculateCrc32(typeface.Name.ToUpper()));
return(typeface);
}
