uharfbuzz-test.py

#!/usr/bin/env python3
import shlex
import subprocess

import uharfbuzz as hb

font_dir = 'fonts/g/mac/10.15.7/'
font_path = f'{font_dir}Hiragino Kaku Gothic W4.ttc'
font_path = f'{font_dir}Hiragino MaruGothic ProN W4.ttc'
font_path = f'{font_dir}Hiragino Mincho ProN.ttc'
text = '\uFF11'

with open(font_path, 'rb') as fontfile:
    fontdata = fontfile.read()
face = hb.Face(fontdata)
font = hb.Font(face)

buf = hb.Buffer()
buf.set_message_func(lambda message: print(message))
buf.add_str(text)
# buf.language = 'x-hbotJAN'
# buf.script = 'hani'
buf.guess_segment_properties()

features = {'palt': True}
hb.shape(font, buf, features)

infos = buf.glyph_infos
positions = buf.glyph_positions

for info, pos in zip(infos, positions):
    gid = info.codepoint
    cluster = info.cluster
    x_advance = pos.x_advance
    x_offset = pos.x_offset
    y_offset = pos.y_offset
    print(f"gid{gid}={cluster}@{x_advance},{x_offset}+{y_offset}")

args = ['hb-shape',
        f'--font-file={font_path}',
        # '--face-index=0',
        # '--language=x-hbotJAN',
        # '--script=hani',
        '--trace',
        f'--text={text}']

# Without the feature.
# print(shlex.join(args))
# subprocess.run(args)

# With the feature.
args.append(f'--features={",".join(features.keys())}')
print(shlex.join(args))
subprocess.run(args)