Internal
' REQ'
-- tag used for required features
For TeX
ITLC
-- Italic
correctionTCHL
-- TeX Charlist
TEXL
-- TeX Extension
List
The table begins with a table header containing a version number and a count of sub-tables
uint32 version currently 0x00010000 uint32 count This is followed by a table of contents, there will be count replications of the following structure (ie. a tag and offset for each sub-table
uint32 tag uint32 offset from start of 'PfEd' table The format of the subtable depends on the sub-table's tag. There are currently 3 tags supported, these are
The sub-table header begins with a version number, and a count of ranges
uint16 version 0 uint16 count of ranges After this will be <count> instances of the following structure
uint16 starting glyph index uint16 ending glyph index uint32 color expressed as a 24bit rgb value
The sub-table header begins with a version number, and a count of ranges
uint16 version 0 uint16 count of ranges After this will be <count> instances of the following structure
uint16 starting glyph index uint16 ending glyph index uint32 offset from the start of this sub-table The offset points to an array of offsets (<end>-<start>+1+1) elements in the array, so one element for each glyph index mentioned in the range structure above, with one left over which allows readers to compute the the length of the last string.
uint32 offset from start of table ... And each of these offsets points to a unicode (UCS2) string. The strings are assumed to be consecutive, so the length of each may be calculated by subtracting its offset from the offset to the next string.
The sub-table header begins with a version number, and a count of ranges
uint16 version 0 uint16 length number of characters in the string And this is followed by <length> Unicode (UCS2) characters. Currently these unicode characters will always contain ASCII values, but that may change some day.