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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
1) copyrighted or used a non-BSD compatible license
2) had too many dependencies and I wanted a free standing lib
3) 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 = file('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]
AUTHOR:
John D. Hunter
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Check if the file at least looks like AFM.
If not, raise :exc:`RuntimeError`.
Ni t StartFontMetricss Not an AFM file( t tellt readlinet seekt
startswitht RuntimeError( t fht post line( ( s4 /usr/lib64/python2.6/site-packages/matplotlib/afm.pyt
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* '0'->0
* '-168 -218 1000 898'-> [-168, -218, 1000, 898]
Dictionary keys are
StartFontMetrics, FontName, FullName, FamilyName, Weight,
ItalicAngle, IsFixedPitch, FontBBox, UnderlinePosition,
UnderlineThickness, Version, Notice, EncodingScheme, CapHeight,
XHeight, Ascender, Descender, StartCharMetrics
R t FontNamet FullNamet
FamilyNamet Weightt ItalicAnglet IsFixedPitcht FontBBoxt UnderlinePositiont UnderlineThicknesst Versiont Noticet EncodingSchemet CapHeightt Capheightt XHeightt Ascendert Descendert StdHWt StdVWt StartCharMetricst CharacterSett
Characterst CommentR i i i t s" Value error parsing header in AFM:s/ Found an unknown keyword in AFM header (was %s)s Bad parseN( R
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Parse the Adobe Font Metics file in file handle *fh*. Return value
is a (*dhead*, *dcmetrics*, *dkernpairs*, *dcomposite*) tuple where
*dhead* is a :func:`_parse_header` dict, *dcmetrics* is a
:func:`_parse_composites` dict, *dkernpairs* is a
:func:`_parse_kern_pairs` dict (possibly {}), and *dcomposite* is a
:func:`_parse_composites` dict (possibly {})
i i ( R RA RN Rb ( R t dheadt dcmetrics_asciit dcmetrics_namet doptional( ( s4 /usr/lib64/python2.6/site-packages/matplotlib/afm.pyt parse_afm s
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Parse the AFM file in file object *fh*
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Return the string width (including kerning) and string height
as a (*w*, *h*) tuple.
i g eAs
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Return the string bounding box
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Return the string bounding box
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Get the name of the character, ie, ';' is 'semicolon'
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Get the width of the character from the character metric WX
field
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Get the width of the character from a type1 character name
( Rl ( Rn RL RK RM ( ( s4 /usr/lib64/python2.6/site-packages/matplotlib/afm.pyt get_width_from_char_name s c C s5 | p t | } n | i | \ } } } | d S( su
Get the height of character *c* from the bounding box. This
is the ink height (space is 0)
i( Rr Rk ( Rn Rs Rt RK RL RM ( ( s4 /usr/lib64/python2.6/site-packages/matplotlib/afm.pyt get_height_char s c C s/ | i | | i | } } | i | | S( s_
Return the kerning pair distance (possibly 0) for chars *c1*
and *c2*
( R t get_kern_dist_from_name( Rn RR RS t name1t name2( ( s4 /usr/lib64/python2.6/site-packages/matplotlib/afm.pyt
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Return the kerning pair distance (possibly 0) for chars
*name1* and *name2*
i N( Rj ( Rn R R ( ( s4 /usr/lib64/python2.6/site-packages/matplotlib/afm.pyR s c C s | i d S( s' Return the font name, eg, 'Times-Roman'R ( Ri ( Rn ( ( s4 /usr/lib64/python2.6/site-packages/matplotlib/afm.pyt get_fontname s c C s4 | i i d } | d j o | i d } n | S( s, Return the font full name, eg, 'Times-Roman'R R N( Ri R Rv ( Rn RL ( ( s4 /usr/lib64/python2.6/site-packages/matplotlib/afm.pyt get_fullname s
c C sI | i i d } | d j o | S| i } d } t i | d | S( s( Return the font family name, eg, 'Times'R sY (?i)([ -](regular|plain|italic|oblique|bold|semibold|light|ultralight|extra|condensed))+$R5 N( Ri R Rv R t ret sub( Rn RL t extras( ( s4 /usr/lib64/python2.6/site-packages/matplotlib/afm.pyt get_familyname s
c C s | i d S( s- Return the font weight, eg, 'Bold' or 'Roman'R! ( Ri ( Rn ( ( s4 /usr/lib64/python2.6/site-packages/matplotlib/afm.pyt
get_weight s c C s | i d S( s Return the fontangle as floatR" ( Ri ( Rn ( ( s4 /usr/lib64/python2.6/site-packages/matplotlib/afm.pyt get_angle s c C s | i d S( s Return the cap height as floatR* ( Ri ( Rn ( ( s4 /usr/lib64/python2.6/site-packages/matplotlib/afm.pyt
get_capheight s c C s | i d S( s Return the xheight as floatR, ( Ri ( Rn ( ( s4 /usr/lib64/python2.6/site-packages/matplotlib/afm.pyt get_xheight s c C s | i d S( s' Return the underline thickness as floatR& ( Ri ( Rn ( ( s4 /usr/lib64/python2.6/site-packages/matplotlib/afm.pyt get_underline_thickness s c C s | i i d d S( su
Return the standard horizontal stem width as float, or *None* if
not specified in AFM file.
R/ N( Ri R Rv ( Rn ( ( s4 /usr/lib64/python2.6/site-packages/matplotlib/afm.pyt get_horizontal_stem_width s c C s | i i d d S( ss
Return the standard vertical stem width as float, or *None* if
not specified in AFM file.
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