This is a python interface to Adobe Font Metrics Files. Although a number of other python implementations exist (and may be more complete than mine) I decided not to go with them because either they were either
- copyrighted or used a non-BSD compatible license
- had too many dependencies and I wanted a free standing lib
- Did more than I needed and it was easier to write my own than figure out how to just get what I needed from theirs
It is pretty easy to use, and requires only built-in python libs:
>>> from afm import AFM
>>> fh = open('ptmr8a.afm')
>>> afm = AFM(fh)
>>> afm.string_width_height('What the heck?')
(6220.0, 683)
>>> afm.get_fontname()
'Times-Roman'
>>> afm.get_kern_dist('A', 'f')
0
>>> afm.get_kern_dist('A', 'y')
-92.0
>>> afm.get_bbox_char('!')
[130, -9, 238, 676]
>>> afm.get_bbox_font()
[-168, -218, 1000, 898]
Bases: object
Parse the AFM file in file object fh
Return the fontangle as float
Return the cap height as float
Return the font family name, eg, ‘Times’
Return the font name, eg, ‘Times-Roman’
Return the font full name, eg, ‘Times-Roman’
Get the height of character c from the bounding box. This is the ink height (space is 0)
Return the standard horizontal stem width as float, or None if not specified in AFM file.
Return the kerning pair distance (possibly 0) for chars c1 and c2
Return the kerning pair distance (possibly 0) for chars name1 and name2
Get the name of the character, ie, ‘;’ is ‘semicolon’
Return the string bounding box
Return the string bounding box
Return the underline thickness as float
Return the standard vertical stem width as float, or None if not specified in AFM file.
Return the font weight, eg, ‘Bold’ or ‘Roman’
Get the width of the character from the character metric WX field
Get the width of the character from a type1 character name
Return the xheight as float
Return the string width (including kerning) and string height as a (w, h) tuple.
Parse the Adobe Font Metics file in file handle fh. Return value is a (dhead, dcmetrics, dkernpairs, dcomposite) tuple where dhead is a _parse_header() dict, dcmetrics is a _parse_composites() dict, dkernpairs is a _parse_kern_pairs() dict (possibly {}), and dcomposite is a _parse_composites() dict (possibly {})