Conventions

Many data types, listed below, are used in the TrueType Open table formats. As with all other TrueType data types, the TrueType Open tables store multi-byte values in "Motorola order," with the most significant byte first.

Data types

Type	Description
uint8	Unsigned character (length = 8 bits)
uint16	Unsigned integer (length = 16 bits)
int16	Signed integer (length = 16 bits)
uint32	Unsigned long integer (length = 32 bits)
fixed32	Fixed point 16.16 number (length = 32 bits)
Tag	Array of four uint8s (length = 32 bits)
	—used to identify a script, language system, feature, or baseline
GlyphID	Glyph index number, same as uint16 (length = 16 bits)
Offset	Offset to a table, same as uint16 (length = 16 bits)
	—NULL offset = 0x0000