List-1  Extended 'FOND' resource structure

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	t h e   S t r u c t u r e   o f   e x t e n d e d   F O N D   f o r   
						
						Vertical character mapping

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///////// Imaginary structure definition ////////////////////////////////////////

typedef	int8		(8 bit signed integer)
typedef	uint8		(8 bit unsigned integer)
typedef	int16		(16 bit signed integer)
typedef	uint16		(16 bit unsigned integer)
typedef	int32		(32 bit signed integer)
typedef	uint32		(32 bit unsigned integer)

struct	FOND {
	uint16	flags;				// flags for this family
	int16	familyID;			// family ID number
	uint16	firstChar;			// first character in font
	uint16	lastChar;			// last character in font
	int16	ascent;				// maximum Ascent expressed for 1 pt.
	int16	descent;			// maximum Descent expressed for 1 pt.
	int16	leading;			// maximum Leading expressed for 1 pt.
	int16	widthMax;			// maximum MaxWidth expressed for 1 pt.
	uint32	offsetToWidTab;			// offset to width table
	uint32	offsetToKernTab;		// offset to kerning table
	uint32	offsetToStyleTab;		// offset to Style Mapping Table
	uint16	property[9];			// contains style property info
	uint32	offsetToAddtionalTable;		// offset to additional data table
						// (reserved for internatioal)
	uint16	version;			// version
	uint16	numAssocTable;			// number of association tables

struct	assocTable {				// font association table
	uint16	size;				// font size
	uint16	style;				// font style
	uint16	resourceID;			// font resource ID
} [numAssocTable];
			•
			•
			•
AdditionalTableDirectory:
	struct	additionalTableDirectory {	// additional table directory
		uint32	version;		// version of this table
		uint16	numTables;		// number of tables
		uint16	searchRange;		// search range
		uint16	entrySelector;		// entry selector
		uint16	rangeShift;		// range shift value

	struct	tableDirectory {		// table directories
		uint32	tag;			// 4-byte identifier
		uint32	checkSum;		// check sum for this table
		uint32	offset;			// offset from beginning of
						// additional table directory
		uint32	length;			// length of this table
		} [numTables];
	};
			•
			•
			•
			
VerCharShift:
	uint32 verticalShiftValue;		// $500 for 10ku shift and $6A00 for 84Ku shift encoding

///////// Descriptions for this structure ///////////////////////////////////////

<<< Additional table directory >>>
This new structure looks exactly like a table directory in the beginning of
a 'sfnt' resource.

• version, numTables, searchRange, entrySelector and rangeShift
	See the TrueType™ Font Format Specification.

• Table directory entry for vertical character encoding
	A tag of vertical character encoding information in the table directory 
	entry is 'tate'.
	
• The shift value are used to calculate the vertical character's Shift-JIS
	code from horizontal character's Shift-JIS code.  For example,
	$8141 + $500 = $8641       // 1 Ku 2 Ten  --> 11 Ku 2 Ten for 10Ku shift.
	
	$8141 + $6A00 = $EB41      // 1 Ku 2 Ten  --> 85 Ku 2 ten for 84Ku Shift.

• If this table tag is not found, then the vertical characters can be
	assumed to be at 10ku shift position.  However, the font may not have 
	vertical characters at all (such as Tohaba fonts). The same applies when 
	the field "offsetToAddtionalTable" has zero as the offset.

Fig. 1 Extended FOND resource structure