def runHB(direction, script, language, features, text, fontname, positions):
font = getHbFont(fontname)
buf = HarfBuzz.buffer_create()
text = toUnicode(text)
HarfBuzz.buffer_add_utf8(buf, text.encode('utf-8'), 0, -1)
HarfBuzz.buffer_set_direction(buf, HarfBuzz.direction_from_string(toBytes(direction)))
HarfBuzz.buffer_set_script(buf, HarfBuzz.script_from_string(toBytes(script)))
if language:
HarfBuzz.buffer_set_language(buf, HarfBuzz.language_from_string(toBytes(language)))
if features:
features = [HarfBuzz.feature_from_string(toBytes(fea))[1] for fea in features.split(',')]
else:
features = []
HarfBuzz.shape(font, buf, features)
info = HarfBuzz.buffer_get_glyph_infos(buf)
ttfont = getTtFont(fontname)
if positions:
pos = HarfBuzz.buffer_get_glyph_positions(buf)
glyphs = []
for i, p in zip(info, pos):
glyph = ttfont.getGlyphName(i.codepoint)
if p.x_offset or p.y_offset:
glyph += "@%d,%d" % (p.x_offset, p.y_offset)
glyph += "+%d" % p.x_advance
if p.y_advance:
glyph += ",%d" % p.y_advance
glyphs.append(glyph)
out = "|".join(glyphs)
else:
out = "|".join([ttfont.getGlyphName(i.codepoint) for i in info])
return "[%s]" % out
