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#!/usr/bin/env python3
'''
Build script for Variable Fonts (VF)
'''
from pathlib import Path
import argparse
import subprocess
import shutil
FAMILY_NAME = 'SourceSans3VF'
ROOT_DIR = Path(__file__).parent
def get_args():
parser = argparse.ArgumentParser(
description=(__doc__))
parser.add_argument(
'-v', '--verbose',
action='store_true',
default=False,
help='verbose output')
parser.add_argument(
'--hinted',
action='store_true',
default=False,
help='hint VFs')
parser.add_argument(
'-d', '--debug',
action='store_true',
default=False,
help='do not delete temporary files')
return parser.parse_args()
def remove_source_otfs(slope):
# deletes source otf files
for i in range(4):
source_directory = ROOT_DIR.joinpath(
f'{slope}', 'Poles', f'pole_{i}')
for otf_to_delete in source_directory.glob("*.otf"):
subprocess.call(['rm', otf_to_delete])
def build_vf(args, slope):
# default mode is being quiet
STDOUT = subprocess.DEVNULL
STDERR = subprocess.DEVNULL
if any([args.verbose, args.debug]):
# verbose output
STDOUT = None
STDERR = None
target_dir = ROOT_DIR.joinpath(f'{slope}')
if slope == 'Italic':
vf_output_name = ROOT_DIR.joinpath(
target_dir, f'{FAMILY_NAME}-{slope}')
else:
slope == 'Upright'
vf_output_name = ROOT_DIR.joinpath(
target_dir, f'{FAMILY_NAME}-{slope}')
output_otf = vf_output_name.with_suffix('.otf')
output_ttf = vf_output_name.with_suffix('.ttf')
designspace_file = vf_output_name.with_suffix('.designspace')
# build pole OTFs
subprocess.call(
# --mkot to set makeotf options:
# gs to omit glyphs not in the GOADB
# osv 4 to write os/2 table v4
['buildmasterotfs', '--mkot', '-gs,-osv,4', '-d', designspace_file],
stdout=STDOUT,
stderr=STDERR
)
if args.hinted:
# split combined private dicts into FDArrays
subprocess.call(
['splitpsdicts', '-m', f'{slope}/vf_hinting_metadata.plist', '-d', designspace_file],
stdout=STDOUT,
stderr=STDERR
)
# merge OTFs into CFF2
subprocess.call(
# -k is for using 'post' table format 2
['buildcff2vf', '-k', '--omit-mac-names', '-d', designspace_file],
stdout=STDOUT,
stderr=STDERR
)
if args.hinted:
# hint the file
subprocess.call(
['psautohint', '--no-flex', output_otf],
stdout=STDOUT,
stderr=STDERR
)
if not args.hinted:
# at the moment, we don’t subroutinize the hinted fonts.
# extract and subroutinize the CFF2 table
subprocess.call(
['tx', '-cff2', '+S', '+b', '-std', output_otf, '/tmp/.tb_cff2'],
stdout=STDOUT,
stderr=STDERR
)
# replace CFF2 table with subroutinized version
subprocess.call(
['sfntedit', '-a', 'CFF2=/tmp/.tb_cff2', output_otf],
stdout=STDOUT,
stderr=STDERR
)
# build VF TTF with fontmake.
subprocess.call([
'fontmake', '-m', designspace_file, '-o', 'variable',
'--production-names', '--output-path', output_ttf,
'--feature-writer', 'None', '--no-check-compatibility'],
stdout=STDOUT,
stderr=STDERR
)
# use DSIG, name, OS/2, hhea, post, and STAT tables from OTFs
tables_from_otf = (
'DSIG=/tmp/.tb_DSIG,name=/tmp/.tb_name,OS/2=/tmp/.tb_os2,'
'hhea=/tmp/.tb_hhea,post=/tmp/.tb_post,STAT=/tmp/.tb_STAT,'
'fvar=/tmp/.tb_fvar')
subprocess.call([
'sfntedit', '-x', tables_from_otf, output_otf])
subprocess.call([
'sfntedit', '-a', tables_from_otf, output_ttf])
# use cmap, GDEF, GPOS, and GSUB tables from TTFs
tables_from_ttf = (
'cmap=/tmp/.tb_cmap,GDEF=/tmp/.tb_GDEF,'
'GPOS=/tmp/.tb_GPOS,GSUB=/tmp/.tb_GSUB')
subprocess.call([
'sfntedit', '-x', tables_from_ttf, output_ttf])
subprocess.call([
'sfntedit', '-a', tables_from_ttf, output_otf])
# move font files to target directory
if output_otf.exists():
shutil.move(output_otf, vf_dir)
if output_ttf.exists():
shutil.move(output_ttf, vf_dir)
# delete build artifacts
if not args.debug:
remove_source_otfs(slope)
if __name__ == '__main__':
args = get_args()
slopes = ['Upright', 'Italic']
if args.hinted:
output_dir_name = 'VF_hinted'
else:
output_dir_name = 'VF'
vf_dir = ROOT_DIR.joinpath('target', output_dir_name)
# clean existing target directory
if vf_dir.exists():
subprocess.call(['rm', '-rf', vf_dir])
# build target directory
vf_dir.mkdir(parents=True)
for slope in slopes:
build_vf(args, slope)
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