private void ReadCMAP_4_SubTable(ushort format, CMAPRecord rec, TrueTypeTableEntryList list, BigEndianReader reader)
{
//start of the subtable
long pos = reader.Position - 2;
CMAP_4_SubTable four = new CMAP_4_SubTable(format);
int len = reader.ReadUInt16();
reader.ReadUInt16();//skip language
int segCount = reader.ReadUInt16() / 2;
four.segCount = segCount;
int searchRange = reader.ReadUInt16();
four.entrySelector = reader.ReadUInt16();
four.rangeShift = reader.ReadUInt16() / 2;
four.startCount = new ushort[segCount];
four.endCount = new ushort[segCount];
four.idDelta = new short[segCount];
four.idRangeOffset = new ushort[segCount];
for (int i = 0; i < segCount; i++)
{
four.endCount[i] = reader.ReadUInt16();
}
reader.ReadUInt16();
for (int i = 0; i < segCount; i++)
{
four.startCount[i] = reader.ReadUInt16();
}
for (int i = 0; i < segCount; i++)
{
four.idDelta[i] = reader.ReadInt16();
}
for (int i = 0; i < segCount; i++)
{
ushort val = reader.ReadUInt16();
four.idRangeOffset[i] = (ushort)((val >> 1) & 0xffff);
}
List <ushort> glyphs = new List <ushort>();
while (reader.Position < pos + len)
{
glyphs.Add(reader.ReadUInt16());
}
four.glyphids = glyphs.ToArray();
rec.SubTable = four;
}
private void ReadCMAP_0_SubTable(ushort format, CMAPRecord rec, TrueTypeTableEntryList list, BigEndianReader reader)
{
CMAP_0_SubTable zero = new CMAP_0_SubTable(format);
zero.Length = reader.ReadUInt16();
zero.Language = reader.ReadUInt16();
byte[] offsets = new byte[256];
for (int i = 0; i < 256; i++)
{
offsets[i] = reader.ReadByte();
}
zero.GlyphOffsets = offsets;
rec.SubTable = zero;
}
private void ReadCMAP_12_SubTable(ushort format, CMAPRecord rec, TrueTypeTableEntryList list, BigEndianReader reader)
{
}
private TrueTypeFontTable ReadCMAPTable(uint length, TrueTypeTableEntryList list, BigEndianReader reader)
{
SubTables.CMAPTable tbl = new Scryber.OpenType.SubTables.CMAPTable(reader.Position);
Version vers = reader.ReadUShortVersion();
ushort num = reader.ReadUInt16();
tbl.NumberOfTables = num;
tbl.TableVersion = vers;
List <SubTables.CMAPRecord> recs = new List <Scryber.OpenType.SubTables.CMAPRecord>();
for (int i = 0; i < num; i++)
{
ushort plat = reader.ReadUInt16();
ushort enc = reader.ReadUInt16();
uint offset = reader.ReadUInt32();
CMAPRecord rec = new CMAPRecord();
rec.Encoding = new CMapEncoding((CharacterPlatforms)plat, enc);
rec.MapOffset = offset;
recs.Add(rec);
}
foreach (CMAPRecord rec in recs)
{
reader.Position = tbl.FileOffset + rec.MapOffset;
ushort format = reader.ReadUInt16();
switch (format)
{
case (0):
ReadCMAP_0_SubTable(format, rec, list, reader);
break;
case (2):
ReadCMAP_2_SubTable(format, rec, list, reader);
break;
case (4):
ReadCMAP_4_SubTable(format, rec, list, reader);
break;
case (6):
ReadCMAP_6_SubTable(format, rec, list, reader);
break;
case (8):
ReadCMAP_8_SubTable(format, rec, list, reader);
break;
case (10):
ReadCMAP_10_SubTable(format, rec, list, reader);
break;
case (12):
ReadCMAP_12_SubTable(format, rec, list, reader);
break;
default:
break;
}
}
//TODO:Read the CMAP Records
tbl.Records = new CMAPRecordList(recs);
return(tbl);
}
