/******************
* protected methods
*/
protected static OffsetTable ReadOffsetTable(OTFile file, uint filepos)
{
// read the Offset Table from the file
const int SIZEOF_OFFSETTABLE = 12;
OffsetTable ot = null;
// read the offset table
MBOBuffer buf = file.ReadPaddedBuffer(filepos, SIZEOF_OFFSETTABLE);
if (buf != null)
{
if (OTFile.IsValidSfntVersion(buf.GetUint(0)))
{
ot = new OffsetTable(buf);
}
}
// now read the directory entries
if (ot != null)
{
const int SIZEOF_DIRECTORYENTRY = 16;
for (int i = 0; i < ot.numTables; i++)
{
uint dirFilePos = (uint)(filepos + SIZEOF_OFFSETTABLE + i * SIZEOF_DIRECTORYENTRY);
MBOBuffer DirEntBuf = file.ReadPaddedBuffer(dirFilePos, SIZEOF_DIRECTORYENTRY);
if (DirEntBuf != null)
{
DirectoryEntry de = new DirectoryEntry(DirEntBuf);
ot.DirectoryEntries.Add(de);
}
else
{
Debug.Assert(false);
break;
}
}
}
return(ot);
}
