font-Roboto-Classic/scripts/instantiate_condensed.py

import sys
import shutil
import os
from fontTools.ttLib import TTFont
from fontTools.varLib.instancer import instantiateVariableFont
from scripts import (
    update_names,
    update_attribs,
    mkdir
)


roman_instance = {
    "attribs": {"usWidthClass": 5},
    "axes": {"wdth": 75},
    "filename": "RobotoCondensed[wght].ttf",
    "names": {
        "1,3,1,1033": "Roboto Condensed",
        "2,3,1,1033": "Regular",
        "3,3,1,1033": "Google:Roboto Condensed Regular:2016",
        "4,3,1,1033": "Roboto Condensed Regular",
        "6,3,1,1033": "RobotoCondensed-Regular",
        "25,3,1,1033": "RobotoCondensed"
    },
}

italic_instance = {
    "attribs": {"usWidthClass": 5, "italicAngle": -12, "caretSlopeRise": 2048, "caretSlopeRun": 435},
    "axes": {"wdth": 75},
    "filename": "RobotoCondensed-Italic[wght].ttf",
    "names": {
        "1,3,1,1033": "Roboto Condensed",
        "2,3,1,1033": "Italic",
        "3,3,1,1033": "Google:Roboto Condensed Italic:2016",
        "4,3,1,1033": "Roboto Condensed Italic",
        "6,3,1,1033": "RobotoCondensed-Italic",
        "25,3,1,1033": "RobotoCondensed"
    },
}

def update_fvar_instances(ttfont):
    name = ttfont["name"]
    instances = ttfont['fvar'].instances
    for instance in instances:
        subfamily_id = instance.subfamilyNameID
        post_id = instance.postscriptNameID
        for record in name.names:
            if record.nameID in [subfamily_id]:
                current_name = record.toUnicode()
                new_name = current_name.replace("Condensed", "").strip()
                name.setName(new_name, record.nameID, record.platformID, record.platEncID, record.langID)
            if record.nameID in [post_id]:
                current_name = record.toUnicode()
                new_name = current_name.replace("-Condensed", "Condensed-").strip()
                name.setName(new_name, record.nameID, record.platformID, record.platEncID, record.langID)

            string = record.toUnicode()
            name.setName(string.replace("Roboto-Condensed", "RobotoCondensed-"), record.nameID, record.platformID, record.platEncID, record.langID)


def update_stat(ttfont):
    # Elide Condensed STAT AvisValue
    stat = ttfont["STAT"].table
    name_table = ttfont["name"]
    axis_values = [a for a in stat.AxisValueArray.AxisValue]
    for av in axis_values:
        name_id = av.ValueNameID
        name = name_table.getName(name_id, 3, 1, 0x409).toUnicode()
        if name == "Condensed":
            av.Flags = 2


vf_roman = TTFont(sys.argv[1])
vf_italic = TTFont(sys.argv[2])
out_dir = mkdir(sys.argv[3])


for inst, vf in zip([roman_instance, italic_instance], [vf_roman, vf_italic]):
    print(f"Making {inst['filename']}")
    instance = instantiateVariableFont(vf, inst["axes"])
    update_attribs(instance, **inst["attribs"])
    update_names(instance, rm_private=False, **inst["names"])
    update_fvar_instances(instance)
    update_stat(instance)
    out_path = os.path.join(sys.argv[3], inst["filename"])
    instance.save(out_path)