internal void Read()
{
try
{
int tableOffset = _fontData.Position;
version = _fontData.ReadUShort();
numTables = _fontData.ReadUShort();
bool success = false;
for (int idx = 0; idx < numTables; idx++)
{
PlatformId platformId = (PlatformId)_fontData.ReadUShort();
WinEncodingId encodingId = (WinEncodingId)_fontData.ReadUShort();
int offset = _fontData.ReadLong();
int currentPosition = _fontData.Position;
// Just read Windows stuff.
if (platformId == PlatformId.Win && (encodingId == WinEncodingId.Symbol || encodingId == WinEncodingId.Unicode))
{
symbol = encodingId == WinEncodingId.Symbol;
_fontData.Position = tableOffset + offset;
cmap4 = new CMap4(_fontData, encodingId);
_fontData.Position = currentPosition;
// We have found what we are looking for, so break.
success = true;
break;
}
}
if (!success)
{
throw new InvalidOperationException("Font has no usable platform or encoding ID. It cannot be used with PDFsharp.");
}
}
catch (Exception ex)
{
throw new InvalidOperationException(PSSR.ErrorReadingFontData, ex);
}
}