1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
#!/usr/bin/env python3
'Harfbuzz support for fonttools'
import gi
gi.require_version('HarfBuzz', '0.0')
from gi.repository import HarfBuzz as hb
from gi.repository import GLib
class Glyph(object):
def __init__(self, gid, **kw):
self.gid = gid
for k,v in kw.items():
setattr(self, k, v)
def __repr__(self):
return "[{gid}@({offset[0]},{offset[1]})+({advance[0]},{advance[1]})]".format(**self.__dict__)
def shape_text(f, text, features = [], lang=None, dir="", script="", shapers=""):
fontfile = f.reader.file
fontfile.seek(0, 0)
fontdata = fontfile.read()
blob = hb.glib_blob_create(GLib.Bytes.new(fontdata))
face = hb.face_create(blob, 0)
del blob
font = hb.font_create(face)
upem = hb.face_get_upem(face)
del face
hb.font_set_scale(font, upem, upem)
hb.ot_font_set_funcs(font)
buf = hb.buffer_create()
t = text.encode('utf-8')
hb.buffer_add_utf8(buf, t, 0, -1)
hb.buffer_guess_segment_properties(buf)
if dir:
hb.buffer_set_direction(buf, hb.direction_from_string(dir))
if script:
hb.buffer_set_script(buf, hb.script_from_string(script))
if lang:
hb.buffer_set_language(buf, hb.language_from_string(lang))
feats = []
if len(features):
for feat_string in features:
if hb.feature_from_string(feat_string, -1, aFeats):
feats.append(aFeats)
if shapers:
hb.shape_full(font, buf, feats, shapers)
else:
hb.shape(font, buf, feats)
num_glyphs = hb.buffer_get_length(buf)
info = hb.buffer_get_glyph_infos(buf)
pos = hb.buffer_get_glyph_positions(buf)
glyphs = []
for i in range(num_glyphs):
glyphs.append(Glyph(info[i].codepoint, cluster = info[i].cluster,
offset = (pos[i].x_offset, pos[i].y_offset),
advance = (pos[i].x_advance, pos[i].y_advance),
flags = info[i].mask))
return glyphs
if __name__ == '__main__':
import sys
from fontTools.ttLib import TTFont
font = sys.argv[1]
text = sys.argv[2]
f = TTFont(font)
glyphs = shape_text(f, text)
print(glyphs)
|
