/// <summary>
/// Reads the contents of the "os/2" table from the supplied stream
/// at the current position.
/// </summary>
/// <param name="reader"></param>
protected internal override void Read(FontFileReader reader)
{
FontFileStream stream = reader.Stream;
version = stream.ReadUShort();
avgCharWidth = stream.ReadShort();
usWeightClass = stream.ReadUShort();
usWidthClass = stream.ReadUShort();
// According to the OpenType spec, bit 0 must be zero.
fsType = (ushort)(stream.ReadUShort() & ~1);
subscriptXSize = stream.ReadShort();
subscriptYSize = stream.ReadShort();
subscriptXOffset = stream.ReadShort();
subscriptYOffset = stream.ReadShort();
superscriptXSize = stream.ReadShort();
superscriptYSize = stream.ReadShort();
superscriptXOffset = stream.ReadShort();
superscriptYOffset = stream.ReadShort();
strikeoutSize = stream.ReadShort();
strikeoutPosition = stream.ReadShort();
short familyClass = stream.ReadShort();
classID = (byte)(familyClass >> 8);
subclassID = (byte)(familyClass & 255);
stream.Read(panose, 0, panose.Length);
unicodeRange1 = stream.ReadULong();
unicodeRange2 = stream.ReadULong();
unicodeRange3 = stream.ReadULong();
unicodeRange4 = stream.ReadULong();
vendorID[0] = stream.ReadChar();
vendorID[1] = stream.ReadChar();
vendorID[2] = stream.ReadChar();
vendorID[3] = stream.ReadChar();
fsSelection = stream.ReadUShort();
usFirstCharIndex = stream.ReadUShort();
usLastCharIndex = stream.ReadUShort();
typoAscender = stream.ReadShort();
typoDescender = stream.ReadShort();
typoLineGap = stream.ReadShort();
usWinAscent = stream.ReadUShort();
usWinDescent = stream.ReadUShort();
codePageRange1 = stream.ReadULong();
codePageRange2 = stream.ReadULong();
sxHeight = stream.ReadShort();
sCapHeight = stream.ReadShort();
usDefaultChar = stream.ReadUShort();
usBreakChar = stream.ReadUShort();
usMaxContext = stream.ReadUShort();
}
/// <summary>
/// Reads a string from the storage area beginning at <i>offset</i>
/// consisting of <i>length</i> bytes. The returned string will be
/// converted using the Unicode encoding.
/// </summary>
/// <param name="stream">Big-endian font stream.</param>
/// <param name="stringOffset">
/// The offset in bytes from the beginning of the string storage area.
/// </param>
/// <param name="length">The length of the string in bytes.</param>
/// <returns></returns>
private string ReadString(FontFileStream stream, int stringOffset, int length)
{
// Set a restore point
stream.SetRestorePoint();
// Navigate to beginning of string
stream.Position = Entry.Offset + storageOffset + stringOffset;
// Read string data
byte[] buffer = new byte[length];
stream.Read(buffer, 0, length);
stream.Restore();
// Convert to a little-endian Unicode string
return(Encoding.BigEndianUnicode.GetString(buffer));
}
/// <summary>
/// Reads a string from the storage area beginning at <i>offset</i>
/// consisting of <i>length</i> bytes. The returned string will be
/// converted using the Unicode encoding.
/// </summary>
/// <param name="stream">Big-endian font stream.</param>
/// <param name="stringOffset">
/// The offset in bytes from the beginning of the string storage area.
/// </param>
/// <param name="length">The length of the string in bytes.</param>
/// <returns></returns>
private string ReadString(FontFileStream stream, int stringOffset, int length) {
// Set a restore point
stream.SetRestorePoint();
// Navigate to beginning of string
stream.Position = Entry.Offset + storageOffset + stringOffset;
// Read string data
byte[] buffer = new byte[length];
stream.Read(buffer, 0, length);
stream.Restore();
// Convert to a little-endian Unicode string
return Encoding.BigEndianUnicode.GetString(buffer);
}
