private void initialize(Reader reader, long parallax)
{
reader.Position = 0;
uint tag = (uint)reader.ReadUint32();
if (tag == 1953784678) //ttc tag
{
Point version = new Point();
version.X = reader.ReadUint16();
version.Y = reader.ReadUint16();
uint numFonts = (uint)reader.ReadUint32();
uint offsetTable = (uint)reader.ReadUint32();
reader.Position = (int)(offsetTable + 4);
}
ushort numTables = (ushort)reader.ReadUint16();
ushort searchRange = (ushort)reader.ReadUint16();
ushort entrySelector = (ushort)reader.ReadUint16();
ushort rangeShift = (ushort)reader.ReadUint16();
List <OffsetTable> offsetsTables = new List <OffsetTable>();
for (int i = 0; i < numTables; ++i)
{
OffsetTable table = new OffsetTable();
table.Read(reader);
offsetsTables.Add(table);
}
loadRequiredTables(offsetsTables, reader, parallax);
}
protected virtual void loadRequiredTables(List <OffsetTable> offsetsTables, Reader reader, long parallax)
{
string[] tags = { "head", "hhea", "maxp", "loca", "cmap", "glyf", "hmtx", "name", "post" };
for (int i = 0; i < tags.Length; ++i)
{
int index = findTable(offsetsTables, tags[i]);
if (index == -1)
{
throw new PDFWrongFontFileException();
}
OffsetTable offsetTable = offsetsTables[index];
switch (tags[i])
{
case "head":
offsetTable.Table = new HeadTable();
break;
case "hhea":
offsetTable.Table = new HHeaTable();
break;
case "maxp":
offsetTable.Table = new MaxpTable();
break;
case "loca":
short indexToLocFormat = (_tables["head"].Table as HeadTable).IndexToLocFormat;
ushort numGlyphs = (_tables["maxp"].Table as MaxpTable).NumGlyphs;
offsetTable.Table = new LocaTable(indexToLocFormat, numGlyphs);
break;
case "cmap":
offsetTable.Table = new CMapTable();
break;
case "glyf":
offsetTable.Table = new GlyphTable((_tables["loca"].Table as LocaTable).Offsets);
break;
case "hmtx":
ushort numGlyph = (_tables["maxp"].Table as MaxpTable).NumGlyphs;
ushort numOfLongHorMetrics = (_tables["hhea"].Table as HHeaTable).NumOfLongHorMetrics;
offsetTable.Table = new HMtxTable(numOfLongHorMetrics, numGlyph);
break;
case "name":
offsetTable.Table = new NameTable();
break;
case "post":
offsetTable.Table = new PostTable();
break;
}
offsetTable.Table.Read(reader, (int)(offsetTable.Offset - parallax), (int)offsetTable.Length);
_tables.Add(tags[i], offsetTable);
}
}
public override void Write(System.IO.Stream stream, ushort[] glyfIndexes, FontMap map)
{
string[] tags = { "CFF ", "head", "hhea", "hmtx", "maxp", "name", "post" };
int count = tags.Length;
writeHeader(stream, 1330926671);
byte[][] bytes = new byte[count][];
long offset = 12 + 16 * count;
int curTable = 0;
for (int i = 0; i < tags.Length; ++i)
{
if (Tables.ContainsKey(tags[i]))
{
OffsetTable table = Tables[tags[i]];
byte[] buffer;
if (table.Table is CMapTable)
{
buffer = (table.Table as CMapTable).GetData(map);
}
else
{
buffer = table.Table.GetData(glyfIndexes);
}
bytes[curTable] = buffer;
table.Length = buffer.Length;
table.Checksum = calculateCheckSum(buffer);
table.Offset = offset;
table.Write(stream);
offset += buffer.Length;
++curTable;
}
}
for (int i = 0; i < bytes.Length; ++i)
{
byte[] buf = bytes[i];
stream.Write(buf, 0, buf.Length);
}
}