public bool Read(Stream stream)
{
if (stream == null)
{
return(false);
}
Debug.Assert(_woffVersion == WoffUtils.Woff1Version || _woffVersion == WoffUtils.Woff2Version);
var headerSize = this.HeaderSize;
var header = new byte[headerSize];
var sizeRead = stream.Read(header, 0, headerSize);
Debug.Assert(sizeRead == headerSize);
var bufferSize = header.Length;
_signature = WoffBuffer.ReadUInt32BE(header, 0);
_flavor = WoffBuffer.ReadUInt32BE(header, 4);
_length = WoffBuffer.ReadUInt32BE(header, 8);
_numTables = WoffBuffer.ReadUInt16BE(header, 12);
_reserved = WoffBuffer.ReadUInt16BE(header, 14);
_totalSfntSize = WoffBuffer.ReadUInt32BE(header, 16);
if (_woffVersion == WoffUtils.Woff1Version)
{
_majorVersion = WoffBuffer.ReadUInt16BE(header, 20);
_minorVersion = WoffBuffer.ReadUInt16BE(header, 22);
_metaOffset = WoffBuffer.ReadUInt32BE(header, 24);
_metaLength = WoffBuffer.ReadUInt32BE(header, 28);
_metaOrigLength = WoffBuffer.ReadUInt32BE(header, 32);
_privateOffset = WoffBuffer.ReadUInt32BE(header, 36);
_privateLength = WoffBuffer.ReadUInt32BE(header, 40);
}
else
{
_totalCompressedSize = WoffBuffer.ReadUInt32BE(header, 20);
_majorVersion = WoffBuffer.ReadUInt16BE(header, 24);
_minorVersion = WoffBuffer.ReadUInt16BE(header, 26);
_metaOffset = WoffBuffer.ReadUInt32BE(header, 28);
_metaLength = WoffBuffer.ReadUInt32BE(header, 32);
_metaOrigLength = WoffBuffer.ReadUInt32BE(header, 36);
_privateOffset = WoffBuffer.ReadUInt32BE(header, 40);
_privateLength = WoffBuffer.ReadUInt32BE(header, 44);
}
// The signature field in the WOFF-1 header must contain the "magic number" 0x774F4646.
// If the field does not contain this value, user agents must reject the file as invalid.
Debug.Assert((bufferSize == WoffUtils.Woff1HeaderSize)
? _signature == WoffUtils.Woff1Signature : _signature == WoffUtils.Woff2Signature);
// The header includes a reserved field; this must be set to zero.
// If this field is non-zero, a conforming user agent must reject the file as invalid.
Debug.Assert(_reserved == 0);
return(true);
}
