RoyT.TrueType 0.1.0

Roy-T.TrueType

Current version: 0.1.0

A TrueType parser for reading, glyphIds, names, descriptions, and kerning information from TrueType fonts. Supports .NetStandard 1.6, .Net 4.6.1 and higher.

For more information please visit my blog at http://roy-t.nl.

To learn more about the TrueType font format and terminology used here see the Open Type specification.

Why choose this library?

• It can read all formats of the Cmap, Kern, and Name tables that exist in the fonts that come with a standard Windows 10 installation. This means you can use this library to read
  • The glyph ids of all characters supported by the font
  • (Localized) font names, font families, descriptions, and more
• It exposes both an easy to use API to directly get useful information from these tables, but also exposes the tables themselves so you add your own interpretation of the data
• It works on both .Net Core 1.0 and .Net 4.6.1 and higher by targetting .Net standard 1.6

Limitations

• This library aims to read meta-information from .ttf files, it does not give you enough information to render glyphs yourself. For that you need OpenType and HarfBuzz.

Supported Cmap formats

Reference

Usage example

var font = TrueTypeFont.FromFile(@"C:\Windows\Fonts\arial.ttf");

// Using the helper functions
var glyphIndex = GlyphHelper.GetGlyphIndex('A', font);  // 36
var horizontalKerning = KerningHelper.GetHorizontalKerning('A', 'W', 1.0f, font);   // -76
var name = NameHelper.GetName(NameId.FontSubfamilyName, new CultureInfo("nl-NL"), font); // Standaard

// Diving in deep yourself to get some specific information is also possible
if (font.KernTable.SubtableCount > 0)
{
    var leftCode = GlyphHelper.GetGlyphIndex(left, font);
    var rightCode = GlyphHelper.GetGlyphIndex(right, font);

    foreach (var subTable in font.KernTable.Subtables)
    {
        if (subTable.Format0 != null && subTable.Direction == Direction.Vertical
            && subTable.Values == Values.Kerning)
        {
            var pair = new KerningPair((ushort)leftCode, (ushort)rightCode);

            if (subTable.Format0.Map.TryGetValue(pair, out var value))
            {
                // Do something
            }
        }
    }
}