Exemplo n.º 1
0
        public static T Parse <T>(TrueTypeHeaderTable table, TrueTypeDataBytes data, TableRegister.Builder register) where T : ITrueTypeTable
        {
            //checksum https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6.html
            uint sum    = 0;
            var  nLongs = (table.Length + 3) / 4;

            data.Seek(table.Offset);
            while (nLongs-- > 0)
            {
                sum += (uint)data.ReadSignedInt();
            }

            if (sum != table.CheckSum)
            {
                Trace.TraceWarning("Table with invalid checksum found in TrueType font file.");
            }

            if (typeof(T) == typeof(CMapTable))
            {
                return((T)(object)CMapTableParser.Parse(table, data, register));
            }

            if (typeof(T) == typeof(HorizontalMetricsTable))
            {
                return((T)(object)HorizontalMetricsTableParser.Parse(table, data, register));
            }

            if (typeof(T) == typeof(NameTable))
            {
                return((T)(object)NameTableParser.Parse(table, data, register));
            }

            if (typeof(T) == typeof(Os2Table))
            {
                return((T)(object)Os2TableParser.Parse(table, data, register));
            }

            if (typeof(T) == typeof(HorizontalHeaderTable))
            {
                return((T)(object)HorizontalHeaderTableParser.Parse(table, data, register));
            }

            throw new NotImplementedException();
        }