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"""
A little example that shows how the various indexing into the font
tables relate to one another. Mainly for mpl developers....
"""
import matplotlib
from matplotlib.ft2font import FT2Font, KERNING_DEFAULT, KERNING_UNFITTED, KERNING_UNSCALED
#fname = '/usr/share/fonts/sfd/FreeSans.ttf'
fname = matplotlib.get_data_path() + '/fonts/ttf/Vera.ttf'
font = FT2Font(fname)
font.set_charmap(0)
codes = font.get_charmap().items()
#dsu = [(ccode, glyphind) for ccode, glyphind in codes]
#dsu.sort()
#for ccode, glyphind in dsu:
# try: name = font.get_glyph_name(glyphind)
# except RuntimeError: pass
# else: print '% 4d % 4d %s %s'%(glyphind, ccode, hex(int(ccode)), name)
# make a charname to charcode and glyphind dictionary
coded = {}
glyphd = {}
for ccode, glyphind in codes:
name = font.get_glyph_name(glyphind)
coded[name] = ccode
glyphd[name] = glyphind
code = coded['A']
glyph = font.load_char(code)
#print glyph.bbox
print glyphd['A'], glyphd['V'], coded['A'], coded['V']
print 'AV', font.get_kerning(glyphd['A'], glyphd['V'], KERNING_DEFAULT)
print 'AV', font.get_kerning(glyphd['A'], glyphd['V'], KERNING_UNFITTED)
print 'AV', font.get_kerning(glyphd['A'], glyphd['V'], KERNING_UNSCALED)
print 'AV', font.get_kerning(glyphd['A'], glyphd['T'], KERNING_UNSCALED)
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