public static LookupType5Format1SubTable Load(BigEndianBinaryReader reader, long offset, LookupFlags lookupFlags)
{
// MarkLigPosFormat1 Subtable.
// +--------------------+---------------------------------+------------------------------------------------------+
// | Type | Name | Description |
// +====================+=================================+======================================================+
// | uint16 | posFormat | Format identifier: format = 1 |
// +--------------------+---------------------------------+------------------------------------------------------+
// | Offset16 | markCoverageOffset | Offset to markCoverage table, |
// | | | from beginning of MarkLigPos subtable. |
// +--------------------+---------------------------------+------------------------------------------------------+
// | Offset16 | ligatureCoverageOffset | Offset to ligatureCoverage table, |
// | | | from beginning of MarkLigPos subtable. |
// +--------------------+---------------------------------+------------------------------------------------------+
// | uint16 | markClassCount | Number of defined mark classes |
// +--------------------+---------------------------------+------------------------------------------------------+
// | Offset16 | markArrayOffset | Offset to MarkArray table, from beginning |
// | | | of MarkLigPos subtable. |
// +--------------------+---------------------------------+------------------------------------------------------+
// | Offset16 | ligatureArrayOffset | Offset to LigatureArray table, |
// | | | from beginning of MarkLigPos subtable. |
// +--------------------+---------------------------------+------------------------------------------------------+
ushort markCoverageOffset = reader.ReadOffset16();
ushort ligatureCoverageOffset = reader.ReadOffset16();
ushort markClassCount = reader.ReadUInt16();
ushort markArrayOffset = reader.ReadOffset16();
ushort ligatureArrayOffset = reader.ReadOffset16();
var markCoverage = CoverageTable.Load(reader, offset + markCoverageOffset);
var ligatureCoverage = CoverageTable.Load(reader, offset + ligatureCoverageOffset);
var markArrayTable = new MarkArrayTable(reader, offset + markArrayOffset);
var ligatureArrayTable = new LigatureArrayTable(reader, offset + ligatureArrayOffset, markClassCount);
return(new LookupType5Format1SubTable(markCoverage, ligatureCoverage, markArrayTable, ligatureArrayTable, lookupFlags));
}
public LookupType5Format1SubTable(
CoverageTable markCoverage,
CoverageTable ligatureCoverage,
MarkArrayTable markArrayTable,
LigatureArrayTable ligatureArrayTable,
LookupFlags lookupFlags)
: base(lookupFlags)
{
this.markCoverage = markCoverage;
this.ligatureCoverage = ligatureCoverage;
this.markArrayTable = markArrayTable;
this.ligatureArrayTable = ligatureArrayTable;
}
/// <summary>
/// Lookup Type 5: MarkToLigature Attachment Positioning Subtable
/// </summary>
/// <param name="reader"></param>
void ReadLookupType5(BinaryReader reader)
{
//USHORT PosFormat Format identifier-format = 1
//Offset MarkCoverage Offset to Mark Coverage table-from beginning of MarkLigPos subtable
//Offset LigatureCoverage Offset to Ligature Coverage table-from beginning of MarkLigPos subtable
//USHORT ClassCount Number of defined mark classes
//Offset MarkArray Offset to MarkArray table-from beginning of MarkLigPos subtable
//Offset LigatureArray Offset to LigatureArray table-from beginning of MarkLigPos subtable
long thisLookupTablePos = reader.BaseStream.Position;
int j = subTableOffsets.Length;
for (int i = 0; i < j; ++i)
{
long subTableStartAt = lookupTablePos + subTableOffsets[i];
reader.BaseStream.Seek(subTableStartAt, SeekOrigin.Begin);
//-----------------------
ushort format = reader.ReadUInt16();
if (format != 1)
{
throw new NotSupportedException();
}
short markCoverageOffset = reader.ReadInt16(); //from beginning of MarkLigPos subtable
short ligatureCoverageOffset = reader.ReadInt16();
ushort classCount = reader.ReadUInt16();
short markArrayOffset = reader.ReadInt16();
short ligatureArrayOffset = reader.ReadInt16();
//-----------------------
var subTable = new LkSubTableType5();
//-----------------------
subTable.MarkCoverage = CoverageTable.CreateFrom(reader, subTableStartAt + markCoverageOffset);
//-----------------------
subTable.LigatureCoverage = CoverageTable.CreateFrom(reader, subTableStartAt + ligatureCoverageOffset);
//-----------------------
subTable.MarkArrayTable = MarkArrayTable.CreateFrom(reader, subTableStartAt + markArrayOffset);
//-----------------------
reader.BaseStream.Seek(subTableStartAt + ligatureArrayOffset, SeekOrigin.Begin);
var ligatureArrayTable = new LigatureArrayTable();
ligatureArrayTable.ReadFrom(reader, classCount);
subTable.LigatureArrayTable = ligatureArrayTable;
//-----------------------
this.subTables.Add(subTable);
}
}