public static TTFStringMeasurer Create(TrueTypeFile forfont, CMapEncoding encoding, TypeMeasureOptions options)
{
HorizontalMetrics table = forfont.Directories["hmtx"].Table as HorizontalMetrics;
CMAPTable cmap = forfont.Directories["cmap"].Table as CMAPTable;
OS2Table os2 = forfont.Directories["OS/2"].Table as OS2Table;
FontHeader head = forfont.Directories["head"].Table as FontHeader;
HorizontalHeader hhead = forfont.Directories["hhea"].Table as HorizontalHeader;
CMAPSubTable map = cmap.GetOffsetTable(encoding);
if (map == null)
{
encoding = CMapEncoding.Unicode_20;
map = cmap.GetOffsetTable(CMapEncoding.Unicode_20);
}
if (map == null)
{
encoding = CMapEncoding.MacRoman;
map = cmap.GetOffsetTable(CMapEncoding.MacRoman);
}
return(new TTFStringMeasurer(head.UnitsPerEm, map, os2, hhead, table.HMetrics, forfont, encoding, options));
}
protected virtual ITypefaceFont ReadFile(TrueTypeHeader header, IEnumerable <TrueTypeTableEntry> dirs, BigEndianReader reader, long startOffset, IFontInfo reference)
{
var entries = new TrueTypeTableEntryList(dirs);
TrueTypeFile file = new TrueTypeFile(header, entries);
TrueTypeTableFactory factory = this.GetTableFactory();
foreach (TrueTypeTableEntry dir in dirs)
{
TrueTypeFontTable tbl = factory.ReadTable(dir, entries, reader);
if (tbl != null)
{
dir.SetTable(tbl);
}
}
file.EnsureReferenceMatched(reference);
byte[] data = CopyStreamData(reader.BaseStream, startOffset);
file.SetFileData(data, this.DataFormat);
return(file);
}
private TTFStringMeasurer(int unitsPerEm, CMAPSubTable offsets, OS2Table oS2, HorizontalHeader hheader, List <HMetric> metrics, TrueTypeFile font, CMapEncoding encoding, TypeMeasureOptions options)
{
this._unitsPerEm = unitsPerEm;
this._offsets = offsets;
this._os2 = oS2;
this._metrics = metrics;
this._lookup = new Dictionary <char, HMetric>();
this._options = options;
this._fontUseTypo = (oS2.Version >= OS2TableVersion.OpenType15) && ((oS2.Selection & FontSelection.UseTypographicSizes) > 0);
this._hheader = hheader;
this._fontfile = font;
this._cMapEncoding = encoding;
}