1 map entry:cyberb @ Unicode @ <cyberbit.ttf PidEid = 3, 1 means cyberb < INFIX > = >look at Unicode.sfd = >find the mapping = >charcode = >PidEid = 3, 1 = >glyphs eg cyberb01 = >subfont 01 in Unicode.sfd = >charcodes Infix can be anything, thus the question:given a tfm name, how to find out
2 whether this is a subfont ?
3 It is safe to limit the infix to be composed from hexadecimal digits only ?
4 If so, one possibility is : (1)
6 -char -of - tfmname is a hexdigit
8 remove the last char from tfmname
10 a lookup for the tfmname
11 if found an entry with subfont flag then break enddo(2)
12 Or, when a map entry with subfont flag is scanned,
13 let pdftex create all the relevant entries.
14 Which may be a safer and faster solution(but wastes more memory)
17 Let 's do (2), as infix can be any word.
23 - let' s have a map entry : cyberb @ Unicode @ <cyberbit.ttf PidEid = 3, 1 - actions:
25 - create corresponding sfd mapping like("01", "Unicode") =
27 - added those subfont to an AVL tree -
28 create map entries for cyberb01-- cyberbff,
29 each has a pointer to the corresponding sfd mapping entry -
30 extended attributes for map entry:-Pid - Eid - sfd_map -
31 sfd_mapping:-name:sfd name, eg "Unicode" - infix,
32 eg "01" - mapping:long[256]
34 -how to find out whether a sfd has been loaded:
35 -lookup for any entry with the given sfd
36 name - functions:-load_sfd -
38 extend reading map entries -
39 when writting ttf:-if re - encoded-- >
40 process like in case of type1 fonts -
41 if PidEid is being used:-read cmap
42 tables:store(ttfname, pid, eid)
43 -search for used chars - use sfd to find the charcodes - look into cmap to