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font-patcher
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#!/usr/bin/env python
# coding=utf8
# Nerd Fonts Version: 2.3.3
# Script version is further down
from __future__ import absolute_import, print_function, unicode_literals
# Change the script version when you edit this script:
script_version = "3.5.10"
version = "2.3.3"
projectName = "Nerd Fonts"
projectNameAbbreviation = "NF"
projectNameSingular = projectName[:-1]
import sys
import re
import os
import argparse
from argparse import RawTextHelpFormatter
import errno
import subprocess
import json
from enum import Enum
try:
import configparser
except ImportError:
sys.exit(projectName + ": configparser module is probably not installed. Try `pip install configparser` or equivalent")
try:
import psMat
import fontforge
except ImportError:
sys.exit(
projectName + (
": FontForge module could not be loaded. Try installing fontforge python bindings "
"[e.g. on Linux Debian or Ubuntu: `sudo apt install fontforge python3-fontforge`]"
)
)
sys.path.insert(0, os.path.abspath(os.path.dirname(sys.argv[0])) + '/bin/scripts/name_parser/')
try:
from FontnameParser import FontnameParser
from FontnameTools import FontnameTools
FontnameParserOK = True
except ImportError:
FontnameParserOK = False
class TableHEADWriter:
""" Access to the HEAD table without external dependencies """
def getlong(self, pos = None):
""" Get four bytes from the font file as integer number """
if pos:
self.goto(pos)
return (ord(self.f.read(1)) << 24) + (ord(self.f.read(1)) << 16) + (ord(self.f.read(1)) << 8) + ord(self.f.read(1))
def getshort(self, pos = None):
""" Get two bytes from the font file as integer number """
if pos:
self.goto(pos)
return (ord(self.f.read(1)) << 8) + ord(self.f.read(1))
def putlong(self, num, pos = None):
""" Put number as four bytes into font file """
if pos:
self.goto(pos)
self.f.write(bytearray([(num >> 24) & 0xFF, (num >> 16) & 0xFF ,(num >> 8) & 0xFF, num & 0xFF]))
self.modified = True
def putshort(self, num, pos = None):
""" Put number as two bytes into font file """
if pos:
self.goto(pos)
self.f.write(bytearray([(num >> 8) & 0xFF, num & 0xFF]))
self.modified = True
def calc_checksum(self, start, end, checksum = 0):
""" Calculate a font table checksum, optionally ignoring another embedded checksum value (for table 'head') """
self.f.seek(start)
for i in range(start, end - 4, 4):
checksum += self.getlong()
checksum &= 0xFFFFFFFF
i += 4
extra = 0
for j in range(4):
extra = extra << 8
if i + j <= end:
extra += ord(self.f.read(1))
checksum = (checksum + extra) & 0xFFFFFFFF
return checksum
def find_table(self, tablenames, idx):
""" Search all tables for one of the tables in tablenames and store its metadata """
# Use font with index idx if this is a font collection file
self.f.seek(0, 0)
tag = self.f.read(4)
if tag == b'ttcf':
self.f.seek(2*2, 1)
self.num_fonts = self.getlong()
if (idx >= self.num_fonts):
raise Exception('Trying to access subfont index {} but have only {} fonts'.format(idx, num_fonts))
for _ in range(idx + 1):
offset = self.getlong()
self.f.seek(offset, 0)
elif idx != 0:
raise Exception('Trying to access subfont but file is no collection')
else:
self.f.seek(0, 0)
self.num_fonts = 1
self.f.seek(4, 1)
numtables = self.getshort()
self.f.seek(3*2, 1)
for i in range(numtables):
tab_name = self.f.read(4)
self.tab_check_offset = self.f.tell()
self.tab_check = self.getlong()
self.tab_offset = self.getlong()
self.tab_length = self.getlong()
if tab_name in tablenames:
return True
return False
def find_head_table(self, idx):
""" Search all tables for the HEAD table and store its metadata """
# Use font with index idx if this is a font collection file
found = self.find_table([ b'head' ], idx)
if not found:
raise Exception('No HEAD table found in font idx {}'.format(idx))
def goto(self, where):
""" Go to a named location in the file or to the specified index """
if type(where) is str:
positions = {'checksumAdjustment': 2+2+4,
'flags': 2+2+4+4+4,
'lowestRecPPEM': 2+2+4+4+4+2+2+8+8+2+2+2+2+2,
}
where = self.tab_offset + positions[where]
self.f.seek(where)
def calc_full_checksum(self, check = False):
""" Calculate the whole file's checksum """
self.f.seek(0, 2)
self.end = self.f.tell()
full_check = self.calc_checksum(0, self.end, (-self.checksum_adj) & 0xFFFFFFFF)
if check and (0xB1B0AFBA - full_check) & 0xFFFFFFFF != self.checksum_adj:
sys.exit("Checksum of whole font is bad")
return full_check
def calc_table_checksum(self, check = False):
tab_check_new = self.calc_checksum(self.tab_offset, self.tab_offset + self.tab_length - 1, (-self.checksum_adj) & 0xFFFFFFFF)
if check and tab_check_new != self.tab_check:
sys.exit("Checksum of 'head' in font is bad")
return tab_check_new
def reset_table_checksum(self):
new_check = self.calc_table_checksum()
self.putlong(new_check, self.tab_check_offset)
def reset_full_checksum(self):
new_adj = (0xB1B0AFBA - self.calc_full_checksum()) & 0xFFFFFFFF
self.putlong(new_adj, 'checksumAdjustment')
def close(self):
self.f.close()
def __init__(self, filename):
self.modified = False
self.f = open(filename, 'r+b')
self.find_head_table(0)
self.flags = self.getshort('flags')
self.lowppem = self.getshort('lowestRecPPEM')
self.checksum_adj = self.getlong('checksumAdjustment')
def check_panose_monospaced(font):
""" Check if the font's Panose flags say it is monospaced """
# https://forum.high-logic.com/postedfiles/Panose.pdf
panose = list(font.os2_panose)
if panose[0] < 2 or panose[0] > 5:
return -1 # invalid Panose info
panose_mono = ((panose[0] == 2 and panose[3] == 9) or
(panose[0] == 3 and panose[3] == 3))
return 1 if panose_mono else 0
def panose_check_to_text(value, panose = False):
""" Convert value from check_panose_monospaced() to human readable string """
if value == 0:
return "Panose says \"not monospaced\""
if value == 1:
return "Panose says \"monospaced\""
return "Panose is invalid" + (" ({})".format(list(panose)) if panose else "")
def panose_proportion_to_text(value):
""" Interpret a Panose proportion value (4th value) for family 2 (latin text) """
proportion = {
0: "Any", 1: "No Fit", 2: "Old Style", 3: "Modern", 4: "Even Width",
5: "Extended", 6: "Condensed", 7: "Very Extended", 8: "Very Condensed",
9: "Monospaced" }
return proportion.get(value, "??? {}".format(value))
def is_monospaced(font):
""" Check if a font is probably monospaced """
# Some fonts lie (or have not any Panose flag set), spot check monospaced:
width = -1
width_mono = True
for glyph in [ 0x49, 0x4D, 0x57, 0x61, 0x69, 0x6d, 0x2E ]: # wide and slim glyphs 'I', 'M', 'W', 'a', 'i', 'm', '.'
if not glyph in font:
# A 'strange' font, believe Panose
return (check_panose_monospaced(font) == 1, None)
# print(" -> {} {}".format(glyph, font[glyph].width))
if width < 0:
width = font[glyph].width
continue
if font[glyph].width != width:
# Exception for fonts like Code New Roman Regular or Hermit Light/Bold:
# Allow small 'i' and dot to be smaller than normal
# I believe the source fonts are buggy
if glyph in [ 0x69, 0x2E ]:
if width > font[glyph].width:
continue
(xmin, _, xmax, _) = font[glyph].boundingBox()
if width > xmax - xmin:
continue
width_mono = False
break
# We believe our own check more then Panose ;-D
return (width_mono, None if width_mono else glyph)
def force_panose_monospaced(font):
""" Forces the Panose flag to monospaced if they are unset or halfway ok already """
# For some Windows applications (e.g. 'cmd'), they seem to honour the Panose table
# https://forum.high-logic.com/postedfiles/Panose.pdf
panose = list(font.os2_panose)
if panose[0] == 0: # 0 (1st value) = family kind; 0 = any (default)
panose[0] = 2 # make kind latin text and display
print(" Setting Panose 'Family Kind' to 'Latin Text and Display' (was 'Any')")
font.os2_panose = tuple(panose)
if panose[0] == 2 and panose[3] != 9:
print(" Setting Panose 'Proportion' to 'Monospaced' (was '{}')".format(panose_proportion_to_text(panose[3])))
panose[3] = 9 # 3 (4th value) = proportion; 9 = monospaced
font.os2_panose = tuple(panose)
def get_advance_width(font, extended, minimum):
""" Get the maximum/minimum advance width in the extended(?) range """
width = 0
if extended:
end = 0x17f
else:
end = 0x07e
for glyph in range(0x21, end):
if not glyph in font:
continue
if glyph in range(0x7F, 0xBF):
continue # ignore special characters like '1/4' etc
if width == 0:
width = font[glyph].width
continue
if not minimum and width < font[glyph].width:
width = font[glyph].width
elif minimum and width > font[glyph].width:
width = font[glyph].width
return width
def report_advance_widths(font):
return "Advance widths (base/extended): {} - {} / {} - {}".format(
get_advance_width(font, True, True), get_advance_width(font, False, True),
get_advance_width(font, False, False), get_advance_width(font, True, False))
def get_btb_metrics(font):
""" Get the baseline to baseline distance for all three metrics """
hhea_height = font.hhea_ascent - font.hhea_descent
typo_height = font.os2_typoascent - font.os2_typodescent
win_height = font.os2_winascent + font.os2_windescent
win_gap = max(0, font.hhea_linegap - win_height + hhea_height)
hhea_btb = hhea_height + font.hhea_linegap
typo_btb = typo_height + font.os2_typolinegap
win_btb = win_height + win_gap
return (hhea_btb, typo_btb, win_btb, win_gap)
class font_patcher:
def __init__(self, args):
self.args = args # class 'argparse.Namespace'
self.sym_font_args = []
self.config = None # class 'configparser.ConfigParser'
self.sourceFont = None # class 'fontforge.font'
self.patch_set = None # class 'list'
self.font_dim = None # class 'dict'
self.font_extrawide = False
self.onlybitmaps = 0
self.essential = set()
self.config = configparser.ConfigParser(empty_lines_in_values=False, allow_no_value=True)
def patch(self, font):
self.sourceFont = font
self.setup_version()
self.get_essential_references()
self.setup_name_backup(font)
if not self.args.nonmono:
self.assert_monospace()
self.remove_ligatures()
self.setup_patch_set()
self.get_sourcefont_dimensions()
self.improve_line_dimensions()
self.sourceFont.encoding = 'UnicodeFull' # Update the font encoding to ensure that the Unicode glyphs are available
self.onlybitmaps = self.sourceFont.onlybitmaps # Fetch this property before adding outlines. NOTE self.onlybitmaps initialized and never used
if self.args.single:
# Force width to be equal on all glyphs to ensure the font is considered monospaced on Windows.
# This needs to be done on all characters, as some information seems to be lost from the original font file.
self.set_sourcefont_glyph_widths()
# For very wide (almost square or wider) fonts we do not want to generate 2 cell wide Powerline glyphs
if self.font_dim['height'] * 1.8 < self.font_dim['width'] * 2:
print("Very wide and short font, disabling 2 cell Powerline glyphs")
self.font_extrawide = True
# Prevent opening and closing the fontforge font. Makes things faster when patching
# multiple ranges using the same symbol font.
PreviousSymbolFilename = ""
symfont = None
if not os.path.isdir(self.args.glyphdir):
sys.exit("{}: Can not find symbol glyph directory {} "
"(probably you need to download the src/glyphs/ directory?)".format(projectName, self.args.glyphdir))
for patch in self.patch_set:
if patch['Enabled']:
if PreviousSymbolFilename != patch['Filename']:
# We have a new symbol font, so close the previous one if it exists
if symfont:
symfont.close()
symfont = None
if not os.path.isfile(self.args.glyphdir + patch['Filename']):
sys.exit("{}: Can not find symbol source for '{}'\n{:>{}} (i.e. {})".format(
projectName, patch['Name'], '', len(projectName), self.args.glyphdir + patch['Filename']))
if not os.access(self.args.glyphdir + patch['Filename'], os.R_OK):
sys.exit("{}: Can not open symbol source for '{}'\n{:>{}} (i.e. {})".format(
projectName, patch['Name'], '', len(projectName), self.args.glyphdir + patch['Filename']))
symfont = fontforge.open(os.path.join(self.args.glyphdir, patch['Filename']))
# Match the symbol font size to the source font size
symfont.em = self.sourceFont.em
PreviousSymbolFilename = patch['Filename']
# If patch table doesn't include a source start, re-use the symbol font values
SrcStart = patch['SrcStart']
if not SrcStart:
SrcStart = patch['SymStart']
self.copy_glyphs(SrcStart, symfont, patch['SymStart'], patch['SymEnd'], patch['Exact'], patch['ScaleRules'], patch['Name'], patch['Attributes'])
if symfont:
symfont.close()
# The grave accent and fontforge:
# If the type is 'auto' fontforge changes it to 'mark' on export.
# We can not prevent this. So set it to 'baseglyph' instead, as
# that resembles the most common expectations.
# This is not needed with fontforge March 2022 Release anymore.
if "grave" in self.sourceFont:
self.sourceFont["grave"].glyphclass="baseglyph"
def generate(self, sourceFonts):
sourceFont = sourceFonts[0]
# the `PfEd-comments` flag is required for Fontforge to save '.comment' and '.fontlog'.
if int(fontforge.version()) >= 20201107:
gen_flags = (str('opentype'), str('PfEd-comments'), str('no-FFTM-table'))
else:
gen_flags = (str('opentype'), str('PfEd-comments'))
if len(sourceFonts) > 1:
layer = None
# use first non-background layer
for l in sourceFont.layers:
if not sourceFont.layers[l].is_background:
layer = l
break
outfile = os.path.normpath(os.path.join(
sanitize_filename(self.args.outputdir, True),
sanitize_filename(sourceFont.familyname) + ".ttc"))
sourceFonts[0].generateTtc(outfile, sourceFonts[1:], flags=gen_flags, layer=layer)
message = " Generated {} fonts\n \===> '{}'".format(len(sourceFonts), outfile)
else:
fontname = sourceFont.fullname
if not fontname:
fontname = sourceFont.cidfontname
outfile = os.path.normpath(os.path.join(
sanitize_filename(self.args.outputdir, True),
sanitize_filename(fontname) + self.args.extension))
bitmaps = str()
if len(self.sourceFont.bitmapSizes):
if not self.args.quiet:
print("Preserving bitmaps {}".format(self.sourceFont.bitmapSizes))
bitmaps = str('otf') # otf/ttf, both is bf_ttf
sourceFont.generate(outfile, bitmap_type=bitmaps, flags=gen_flags)
message = " {}\n \===> '{}'".format(self.sourceFont.fullname, outfile)
# Adjust flags that can not be changed via fontforge
if re.search('\\.[ot]tf$', self.args.font, re.IGNORECASE) and re.search('\\.[ot]tf$', outfile, re.IGNORECASE):
try:
source_font = TableHEADWriter(self.args.font)
dest_font = TableHEADWriter(outfile)
for idx in range(source_font.num_fonts):
if not self.args.quiet:
print("{}: Tweaking {}/{}".format(projectName, idx + 1, source_font.num_fonts))
source_font.find_head_table(idx)
dest_font.find_head_table(idx)
if source_font.flags & 0x08 == 0 and dest_font.flags & 0x08 != 0:
if not self.args.quiet:
print("Changing flags from 0x{:X} to 0x{:X}".format(dest_font.flags, dest_font.flags & ~0x08))
dest_font.putshort(dest_font.flags & ~0x08, 'flags') # clear 'ppem_to_int'
if source_font.lowppem != dest_font.lowppem:
if not self.args.quiet:
print("Changing lowestRecPPEM from {} to {}".format(dest_font.lowppem, source_font.lowppem))
dest_font.putshort(source_font.lowppem, 'lowestRecPPEM')
if dest_font.modified:
dest_font.reset_table_checksum()
dest_font.reset_full_checksum()
except Exception as error:
print("Can not handle font flags ({})".format(repr(error)))
finally:
try:
source_font.close()
dest_font.close()
except:
pass
if self.args.is_variable:
print("Warning: Source font is a variable open type font (VF) and the patch results will most likely not be what you want")
print(message)
if self.args.postprocess:
subprocess.call([self.args.postprocess, outfile])
print("\nPost Processed: {}".format(outfile))
def setup_name_backup(self, font):
""" Store the original font names to be able to rename the font multiple times """
font.persistent = {
"fontname": font.fontname,
"fullname": font.fullname,
"familyname": font.familyname,
}
def setup_font_names(self, font):
font.fontname = font.persistent["fontname"]
font.fullname = font.persistent["fullname"]
font.familyname = font.persistent["familyname"]
verboseAdditionalFontNameSuffix = " " + projectNameSingular
if self.args.windows: # attempt to shorten here on the additional name BEFORE trimming later
additionalFontNameSuffix = " " + projectNameAbbreviation
else:
additionalFontNameSuffix = verboseAdditionalFontNameSuffix
if not self.args.complete:
# NOTE not all symbol fonts have appended their suffix here
if self.args.fontawesome:
additionalFontNameSuffix += " A"
verboseAdditionalFontNameSuffix += " Plus Font Awesome"
if self.args.fontawesomeextension:
additionalFontNameSuffix += " AE"
verboseAdditionalFontNameSuffix += " Plus Font Awesome Extension"
if self.args.octicons:
additionalFontNameSuffix += " O"
verboseAdditionalFontNameSuffix += " Plus Octicons"
if self.args.powersymbols:
additionalFontNameSuffix += " PS"
verboseAdditionalFontNameSuffix += " Plus Power Symbols"
if self.args.codicons:
additionalFontNameSuffix += " C"
verboseAdditionalFontNameSuffix += " Plus Codicons"
if self.args.pomicons:
additionalFontNameSuffix += " P"
verboseAdditionalFontNameSuffix += " Plus Pomicons"
if self.args.fontlogos:
additionalFontNameSuffix += " L"
verboseAdditionalFontNameSuffix += " Plus Font Logos"
if self.args.material:
additionalFontNameSuffix += " MDI"
verboseAdditionalFontNameSuffix += " Plus Material Design Icons"
if self.args.weather:
additionalFontNameSuffix += " WEA"
verboseAdditionalFontNameSuffix += " Plus Weather Icons"
# if all source glyphs included simplify the name
else:
additionalFontNameSuffix = " " + projectNameSingular + " Complete"
verboseAdditionalFontNameSuffix = " " + projectNameSingular + " Complete"
# add mono signifier to end of name
if self.args.single:
additionalFontNameSuffix += " M"
verboseAdditionalFontNameSuffix += " Mono"
if FontnameParserOK and self.args.makegroups:
use_fullname = type(font.fullname) == str # Usually the fullname is better to parse
# Use fullname if it is 'equal' to the fontname
if font.fullname:
use_fullname |= font.fontname.lower() == FontnameTools.postscript_char_filter(font.fullname).lower()
# Use fullname for any of these source fonts (that are impossible to disentangle from the fontname, we need the blanks)
for hit in [ 'Meslo' ]:
use_fullname |= font.fontname.lower().startswith(hit.lower())
parser_name = font.fullname if use_fullname else font.fontname
# Gohu fontnames hide the weight, but the file names are ok...
if parser_name.startswith('Gohu'):
parser_name = os.path.splitext(os.path.basename(self.args.font))[0]
n = FontnameParser(parser_name)
if not n.parse_ok:
print("Have only minimal naming information, check resulting name. Maybe omit --makegroups option")
n.drop_for_powerline()
n.enable_short_families(True, "Noto")
n.set_for_windows(self.args.windows)
# All the following stuff is ignored in makegroups-mode
# basically split the font name around the dash "-" to get the fontname and the style (e.g. Bold)
# this does not seem very reliable so only use the style here as a fallback if the font does not
# have an internal style defined (in sfnt_names)
# using '([^-]*?)' to get the item before the first dash "-"
# using '([^-]*(?!.*-))' to get the item after the last dash "-"
fontname, fallbackStyle = re.match("^([^-]*).*?([^-]*(?!.*-))$", font.fontname).groups()
# dont trust 'font.familyname'
familyname = fontname
# fullname (filename) can always use long/verbose font name, even in windows
if font.fullname != None:
fullname = font.fullname + verboseAdditionalFontNameSuffix
else:
fullname = font.cidfontname + verboseAdditionalFontNameSuffix
fontname = fontname + additionalFontNameSuffix.replace(" ", "")
# let us try to get the 'style' from the font info in sfnt_names and fallback to the
# parse fontname if it fails:
try:
# search tuple:
subFamilyTupleIndex = [x[1] for x in font.sfnt_names].index("SubFamily")
# String ID is at the second index in the Tuple lists
sfntNamesStringIDIndex = 2
# now we have the correct item:
subFamily = font.sfnt_names[subFamilyTupleIndex][sfntNamesStringIDIndex]
except IndexError:
sys.stderr.write("{}: Could not find 'SubFamily' for given font, falling back to parsed fontname\n".format(projectName))
subFamily = fallbackStyle
# some fonts have inaccurate 'SubFamily', if it is Regular let us trust the filename more:
if subFamily == "Regular" and len(fallbackStyle):
subFamily = fallbackStyle
# This is meant to cover the case where the SubFamily is "Italic" and the filename is *-BoldItalic.
if len(subFamily) < len(fallbackStyle):
subFamily = fallbackStyle
if len(subFamily) == 0:
subFamily = "Regular"
if self.args.windows:
maxFamilyLength = 31
maxFontLength = maxFamilyLength - len('-' + subFamily)
familyname += " " + projectNameAbbreviation
if self.args.single:
familyname += "M"
fullname += " Windows Compatible"
# now make sure less than 32 characters name length
if len(fontname) > maxFontLength:
fontname = fontname[:maxFontLength]
if len(familyname) > maxFamilyLength:
familyname = familyname[:maxFamilyLength]
else:
familyname += " " + projectNameSingular
if self.args.single:
familyname += " Mono"
# Don't truncate the subfamily to keep fontname unique. MacOS treats fonts with
# the same name as the same font, even if subFamily is different. Make sure to
# keep the resulting fontname (PostScript name) valid by removing spaces.
fontname += '-' + subFamily.replace(' ', '')
# rename font
#
# comply with SIL Open Font License (OFL)
reservedFontNameReplacements = {
'source' : 'sauce',
'Source' : 'Sauce',
'hermit' : 'hurmit',
'Hermit' : 'Hurmit',
'hasklig' : 'hasklug',
'Hasklig' : 'Hasklug',
'Share' : 'Shure',
'share' : 'shure',
'IBMPlex' : 'Blex',
'ibmplex' : 'blex',
'IBM-Plex' : 'Blex',
'IBM Plex' : 'Blex',
'terminus' : 'terminess',
'Terminus' : 'Terminess',
'liberation' : 'literation',
'Liberation' : 'Literation',
'iAWriter' : 'iMWriting',
'iA Writer' : 'iM Writing',
'iA-Writer' : 'iM-Writing',
'Anka/Coder' : 'AnaConder',
'anka/coder' : 'anaconder',
'Cascadia Code' : 'Caskaydia Cove',
'cascadia code' : 'caskaydia cove',
'CascadiaCode' : 'CaskaydiaCove',
'cascadiacode' : 'caskaydiacove',
'Cascadia Mono' : 'Caskaydia Mono',
'cascadia mono' : 'caskaydia mono',
'CascadiaMono' : 'CaskaydiaMono',
'cascadiamono' : 'caskaydiamono',
'Fira Mono' : 'Fura Mono',
'Fira Sans' : 'Fura Sans',
'FiraMono' : 'FuraMono',
'FiraSans' : 'FuraSans',
'fira mono' : 'fura mono',
'fira sans' : 'fura sans',
'firamono' : 'furamono',
'firasans' : 'furasans',
}
# remove overly verbose font names
# particularly regarding Powerline sourced Fonts (https://github.com/powerline/fonts)
additionalFontNameReplacements = {
'for Powerline': '',
'ForPowerline': ''
}
additionalFontNameReplacements2 = {
'Powerline': ''
}
projectInfo = (
"Patched with '" + projectName + " Patcher' (https://github.com/ryanoasis/nerd-fonts)\n\n"
"* Website: https://www.nerdfonts.com\n"
"* Version: " + version + "\n"
"* Development Website: https://github.com/ryanoasis/nerd-fonts\n"
"* Changelog: https://github.com/ryanoasis/nerd-fonts/blob/-/changelog.md"
)
familyname = replace_font_name(familyname, reservedFontNameReplacements)
fullname = replace_font_name(fullname, reservedFontNameReplacements)
fontname = replace_font_name(fontname, reservedFontNameReplacements)
familyname = replace_font_name(familyname, additionalFontNameReplacements)
fullname = replace_font_name(fullname, additionalFontNameReplacements)
fontname = replace_font_name(fontname, additionalFontNameReplacements)
familyname = replace_font_name(familyname, additionalFontNameReplacements2)
fullname = replace_font_name(fullname, additionalFontNameReplacements2)
fontname = replace_font_name(fontname, additionalFontNameReplacements2)
if not (FontnameParserOK and self.args.makegroups):
# replace any extra whitespace characters:
font.familyname = " ".join(familyname.split())
font.fullname = " ".join(fullname.split())
font.fontname = " ".join(fontname.split())
font.appendSFNTName(str('English (US)'), str('Preferred Family'), font.familyname)
font.appendSFNTName(str('English (US)'), str('Family'), font.familyname)
font.appendSFNTName(str('English (US)'), str('Compatible Full'), font.fullname)
font.appendSFNTName(str('English (US)'), str('SubFamily'), subFamily)
else:
fam_suffix = projectNameSingular if not self.args.windows else projectNameAbbreviation
if self.args.single:
if self.args.windows:
fam_suffix += 'M'
else:
fam_suffix += ' Mono'
n.inject_suffix(verboseAdditionalFontNameSuffix, additionalFontNameSuffix, fam_suffix)
n.rename_font(font)
font.comment = projectInfo
font.fontlog = projectInfo
def setup_version(self):
""" Add the Nerd Font version to the original version """
# print("Version was {}".format(sourceFont.version))
if self.sourceFont.version != None:
self.sourceFont.version += ";" + projectName + " " + version
else:
self.sourceFont.version = str(self.sourceFont.cidversion) + ";" + projectName + " " + version
self.sourceFont.sfntRevision = None # Auto-set (refreshed) by fontforge
self.sourceFont.appendSFNTName(str('English (US)'), str('Version'), "Version " + self.sourceFont.version)
# print("Version now is {}".format(sourceFont.version))
def remove_ligatures(self):
# let's deal with ligatures (mostly for monospaced fonts)
# the tables have been removed from the repo with >this< commit
if self.args.configfile and self.config.read(self.args.configfile):
if self.args.removeligatures:
print("Removing ligatures from configfile `Subtables` section")
ligature_subtables = json.loads(self.config.get("Subtables", "ligatures"))
for subtable in ligature_subtables:
print("Removing subtable:", subtable)
try:
self.sourceFont.removeLookupSubtable(subtable)
print("Successfully removed subtable:", subtable)
except Exception:
print("Failed to remove subtable:", subtable)
elif self.args.removeligatures:
print("Unable to read configfile, unable to remove ligatures")
def assert_monospace(self):
# Check if the sourcefont is monospaced
width_mono, offending_char = is_monospaced(self.sourceFont)
panose_mono = check_panose_monospaced(self.sourceFont)
# The following is in fact "width_mono != panose_mono", but only if panose_mono is not 'unknown'
if (width_mono and panose_mono == 0) or (not width_mono and panose_mono == 1):
print(" Warning: Monospaced check: Panose assumed to be wrong")
print(" {} and {}".format(
report_advance_widths(self.sourceFont),
panose_check_to_text(panose_mono, self.sourceFont.os2_panose)))
if self.args.single and not width_mono:
print(" Warning: Sourcefont is not monospaced - forcing to monospace not advisable, results might be useless")
if offending_char is not None:
print(" Offending char: 0x{:X}".format(offending_char))
if self.args.single <= 1:
sys.exit(projectName + ": Font will not be patched! Give --mono (or -s, or --use-single-width-glyphs) twice to force patching")
if width_mono:
force_panose_monospaced(self.sourceFont)
def setup_patch_set(self):
""" Creates list of dicts to with instructions on copying glyphs from each symbol font into self.sourceFont """
# Supported params: overlap | careful
# Overlap value is used horizontally but vertically limited to 0.01
# The xy-ratio limits the x-scale for a given y-scale to make the ratio <= this value (to prevent over-wide glyphs)
# '1' means occupu 1 cell (default for 'xy')
# '2' means occupy 2 cells (default for 'pa')
# Powerline dividers
SYM_ATTR_POWERLINE = {
'default': {'align': 'c', 'valign': 'c', 'stretch': 'pa', 'params': {}},
# Arrow tips
0xe0b0: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {'overlap': 0.02, 'xy-ratio': 0.7}},
0xe0b1: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {'xy-ratio': 0.7}},
0xe0b2: {'align': 'r', 'valign': 'c', 'stretch': 'xy', 'params': {'overlap': 0.02, 'xy-ratio': 0.7}},
0xe0b3: {'align': 'r', 'valign': 'c', 'stretch': 'xy', 'params': {'xy-ratio': 0.7}},
# Rounded arcs
0xe0b4: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {'overlap': 0.01, 'xy-ratio': 0.59}},
0xe0b5: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {'xy-ratio': 0.5}},
0xe0b6: {'align': 'r', 'valign': 'c', 'stretch': 'xy', 'params': {'overlap': 0.01, 'xy-ratio': 0.59}},
0xe0b7: {'align': 'r', 'valign': 'c', 'stretch': 'xy', 'params': {'xy-ratio': 0.5}},
# Bottom Triangles
0xe0b8: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {'overlap': 0.02}},
0xe0b9: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {}},
0xe0ba: {'align': 'r', 'valign': 'c', 'stretch': 'xy', 'params': {'overlap': 0.02}},
0xe0bb: {'align': 'r', 'valign': 'c', 'stretch': 'xy', 'params': {}},
# Top Triangles
0xe0bc: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {'overlap': 0.02}},
0xe0bd: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {}},
0xe0be: {'align': 'r', 'valign': 'c', 'stretch': 'xy', 'params': {'overlap': 0.02}},
0xe0bf: {'align': 'r', 'valign': 'c', 'stretch': 'xy', 'params': {}},
# Flames
0xe0c0: {'align': 'l', 'valign': 'c', 'stretch': 'xy2', 'params': {'overlap': 0.01}},
0xe0c1: {'align': 'l', 'valign': 'c', 'stretch': 'xy2', 'params': {}},
0xe0c2: {'align': 'r', 'valign': 'c', 'stretch': 'xy2', 'params': {'overlap': 0.01}},
0xe0c3: {'align': 'r', 'valign': 'c', 'stretch': 'xy2', 'params': {}},
# Small squares
0xe0c4: {'align': 'l', 'valign': 'c', 'stretch': 'xy2', 'params': {'overlap': -0.03, 'xy-ratio': 0.86}},
0xe0c5: {'align': 'r', 'valign': 'c', 'stretch': 'xy2', 'params': {'overlap': -0.03, 'xy-ratio': 0.86}},
# Bigger squares
0xe0c6: {'align': 'l', 'valign': 'c', 'stretch': 'xy2', 'params': {'overlap': -0.03, 'xy-ratio': 0.78}},
0xe0c7: {'align': 'r', 'valign': 'c', 'stretch': 'xy2', 'params': {'overlap': -0.03, 'xy-ratio': 0.78}},
# Waveform
0xe0c8: {'align': 'l', 'valign': 'c', 'stretch': 'xy2', 'params': {'overlap': 0.01}},
0xe0ca: {'align': 'r', 'valign': 'c', 'stretch': 'xy2', 'params': {'overlap': 0.01}},
# Hexagons
0xe0cc: {'align': 'l', 'valign': 'c', 'stretch': 'xy2', 'params': {'overlap': 0.02, 'xy-ratio': 0.85}},
0xe0cd: {'align': 'l', 'valign': 'c', 'stretch': 'xy2', 'params': {'xy-ratio': 0.865}},
# Legos
0xe0ce: {'align': 'l', 'valign': 'c', 'stretch': 'pa', 'params': {}},
0xe0cf: {'align': 'c', 'valign': 'c', 'stretch': 'pa', 'params': {}},
0xe0d0: {'align': 'l', 'valign': 'c', 'stretch': 'pa', 'params': {}},
0xe0d1: {'align': 'l', 'valign': 'c', 'stretch': 'pa', 'params': {}},
# Top and bottom trapezoid
0xe0d2: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {'overlap': 0.02, 'xy-ratio': 0.7}},
0xe0d4: {'align': 'r', 'valign': 'c', 'stretch': 'xy', 'params': {'overlap': 0.02, 'xy-ratio': 0.7}}
}
SYM_ATTR_DEFAULT = {
# 'pa' == preserve aspect ratio
'default': {'align': 'c', 'valign': 'c', 'stretch': 'pa', 'params': {}}
}
SYM_ATTR_FONTA = {
# 'pa' == preserve aspect ratio
'default': {'align': 'c', 'valign': 'c', 'stretch': 'pa', 'params': {}},
# Don't center these arrows vertically
0xf0dc: {'align': 'c', 'valign': '', 'stretch': 'pa', 'params': {}},
0xf0dd: {'align': 'c', 'valign': '', 'stretch': 'pa', 'params': {}},
0xf0de: {'align': 'c', 'valign': '', 'stretch': 'pa', 'params': {}}
}
SYM_ATTR_HEAVYBRACKETS = {
'default': {'align': 'c', 'valign': 'c', 'stretch': 'pa', 'params': {'careful': True}}
}
CUSTOM_ATTR = {
# 'pa' == preserve aspect ratio
'default': {'align': 'c', 'valign': '', 'stretch': '', 'params': {}}
}
# Most glyphs we want to maximize (individually) during the scale
# However, there are some that need to be small or stay relative in
# size to each other.
# The glyph-specific behavior can be given as ScaleRules in the patch-set.
#
# ScaleRules can contain two different kind of rules (possibly in parallel):
# - ScaleGlyph:
# Here one specific glyph is used as 'scale blueprint'. Other glyphs are
# scaled by the same factor as this glyph. This is useful if you have one
# 'biggest' glyph and all others should stay relatively in size.
# Shifting in addition to scaling can be selected too (see below).
# - ScaleGroups:
# Here you specify a group of glyphs that should be handled together
# with the same scaling and shifting. The basis for it is a 'combined
# bounding box' of all glyphs in that group. All glyphs are handled as
# if they fill that combined bounding box.
#
# The ScaleGlyph method: You set 'ScaleGlyph' to the unicode of the reference glyph.
# Note that there can be only one per patch-set.
# Additionally you set 'GlyphsToScale' that contains all the glyphs that shall be
# handled (scaled) like the reference glyph.
# It is a List of: ((glyph code) or (tuple of two glyph codes that form a closed range))
# 'GlyphsToScale': [
# 0x0100, 0x0300, 0x0400, # The single glyphs 0x0100, 0x0300, and 0x0400
# (0x0200, 0x0210), # All glyphs 0x0200 to 0x0210 including both 0x0200 and 0x0210
# ]}
# If you want to not only scale but also shift as the refenerce glyph you give the
# data as 'GlyphsToScale+'. Note that only one set is used and the plus version is preferred.
#
# For the ScaleGroup method you define any number groups of glyphs and each group is
# handled separately. The combined bounding box of all glyphs in the group is determined
# and based on that the scale and shift for all the glyphs in the group.
# You define the groups as value of 'ScaleGroups'.
# It is a List of: ((lists of glyph codes) or (ranges of glyph codes))
# 'ScaleGroups': [
# [0x0100, 0x0300, 0x0400], # One group consists of glyphs 0x0100, 0x0300, and 0x0400
# range(0x0200, 0x0210 + 1), # Another group contains glyphs 0x0200 to 0x0210 incl.
#
# Note the subtle differences: tuple vs. range; closed vs open range; etc
# See prepareScaleRules() for some more details.
# For historic reasons ScaleGroups is sometimes called 'new method' and ScaleGlyph 'old'.
# The codepoints mentioned here are symbol-font-codepoints.
DEVI_SCALE_LIST = {'ScaleGlyph': 0xE60E, # Android logo
'GlyphsToScale': [
(0xe6bd, 0xe6c3) # very small things
]}
FONTA_SCALE_LIST = {'ScaleGroups': [
[0xf005, 0xf006, 0xf089], # star, star empty, half star
range(0xf026, 0xf028 + 1), # volume off, down, up
range(0xf02b, 0xf02c + 1), # tag, tags
range(0xf031, 0xf035 + 1), # font et al
range(0xf044, 0xf046 + 1), # edit, share, check (boxes)
range(0xf048, 0xf052 + 1), # multimedia buttons
range(0xf060, 0xf063 + 1), # arrows
[0xf053, 0xf054, 0xf077, 0xf078], # chevron all directions
range(0xf07d, 0xf07e + 1), # resize
range(0xf0a4, 0xf0a7 + 1), # pointing hands
[0xf0d7, 0xf0d8, 0xf0d9, 0xf0da, 0xf0dc, 0xf0dd, 0xf0de], # caret all directions and same looking sort
range(0xf100, 0xf107 + 1), # angle
range(0xf130, 0xf131 + 1), # mic
range(0xf141, 0xf142 + 1), # ellipsis
range(0xf153, 0xf15a + 1), # currencies
range(0xf175, 0xf178 + 1), # long arrows
range(0xf182, 0xf183 + 1), # male and female
range(0xf221, 0xf22d + 1), # gender or so
range(0xf255, 0xf25b + 1), # hand symbols
]}
OCTI_SCALE_LIST = {'ScaleGlyph': 0xF02E, # looking glass (probably biggest glyph?)
'GlyphsToScale': [
(0xf03d, 0xf040), # arrows
0xf044, 0xf05a, 0xf05b, 0xf0aa, # triangles
(0xf051, 0xf053), # small stuff
0xf071, 0xf09f, 0xf0a0, 0xf0a1, # small arrows
0xf078, 0xf0a2, 0xf0a3, 0xf0a4, # chevrons
0xf0ca, # dash
]}
WEATH_SCALE_LIST = {'ScaleGroups': [
[0xf03c, 0xf042, 0xf045 ], # degree signs
[0xf043, 0xf044, 0xf048, 0xf04b, 0xf04c, 0xf04d, 0xf057, 0xf058, 0xf087, 0xf088], # arrows
range(0xf053, 0xf055 + 1), # thermometers
[*range(0xf059, 0xf061 + 1), 0xf0b1], # wind directions
range(0xf089, 0xf094 + 1), # clocks
range(0xf095, 0xf0b0 + 1), # moon phases
range(0xf0b7, 0xf0c3 + 1), # wind strengths
[0xf06e, 0xf070 ], # solar/lunar eclipse
# Note: Codepoints listed before that are also in the following range
# will take the scaling of the previous group (the ScaleGroups are
# searched through in definition order).
# But be careful, the combined bounding box for the following group
# _will_ include all glyphs in its definition: Make sure the exempt
# glyphs from above are smaller (do not extend) the combined bounding
# box of this range:
range(0xf000, 0xf0cb + 1), # lots of clouds and other (Please read note above!)
]}
MDI_SCALE_LIST = {'ScaleGlyph': 0xf068d, # 'solid' fills complete design space
'GlyphsToScale+': [
(0xf0000, 0xfffff) # all because they are very well scaled already
]}
# Define the character ranges
# Symbol font ranges
self.patch_set = [
{'Enabled': True, 'Name': "Seti-UI + Custom", 'Filename': "original-source.otf", 'Exact': False, 'SymStart': 0xE4FA, 'SymEnd': 0xE5FF, 'SrcStart': 0xE5FA, 'ScaleRules': None, 'Attributes': SYM_ATTR_DEFAULT},
{'Enabled': True, 'Name': "Heavy Angle Brackets", 'Filename': "extraglyphs.sfd", 'Exact': True, 'SymStart': 0x0000, 'SymEnd': 0x0000, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_HEAVYBRACKETS},
{'Enabled': True, 'Name': "Devicons", 'Filename': "devicons.ttf", 'Exact': False, 'SymStart': 0xE600, 'SymEnd': 0xE6C5, 'SrcStart': 0xE700, 'ScaleRules': DEVI_SCALE_LIST, 'Attributes': SYM_ATTR_DEFAULT},
{'Enabled': self.args.powerline, 'Name': "Powerline Symbols", 'Filename': "powerline-symbols/PowerlineSymbols.otf", 'Exact': True, 'SymStart': 0xE0A0, 'SymEnd': 0xE0A2, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_POWERLINE},
{'Enabled': self.args.powerline, 'Name': "Powerline Symbols", 'Filename': "powerline-symbols/PowerlineSymbols.otf", 'Exact': True, 'SymStart': 0xE0B0, 'SymEnd': 0xE0B3, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_POWERLINE},
{'Enabled': self.args.powerlineextra, 'Name': "Powerline Extra Symbols", 'Filename': "PowerlineExtraSymbols.otf", 'Exact': True, 'SymStart': 0xE0A3, 'SymEnd': 0xE0A3, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_POWERLINE},
{'Enabled': self.args.powerlineextra, 'Name': "Powerline Extra Symbols", 'Filename': "PowerlineExtraSymbols.otf", 'Exact': True, 'SymStart': 0xE0B4, 'SymEnd': 0xE0C8, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_POWERLINE},
{'Enabled': self.args.powerlineextra, 'Name': "Powerline Extra Symbols", 'Filename': "PowerlineExtraSymbols.otf", 'Exact': True, 'SymStart': 0xE0CA, 'SymEnd': 0xE0CA, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_POWERLINE},
{'Enabled': self.args.powerlineextra, 'Name': "Powerline Extra Symbols", 'Filename': "PowerlineExtraSymbols.otf", 'Exact': True, 'SymStart': 0xE0CC, 'SymEnd': 0xE0D4, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_POWERLINE},
{'Enabled': self.args.pomicons, 'Name': "Pomicons", 'Filename': "Pomicons.otf", 'Exact': True, 'SymStart': 0xE000, 'SymEnd': 0xE00A, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_DEFAULT},
{'Enabled': self.args.fontawesome, 'Name': "Font Awesome", 'Filename': "font-awesome/FontAwesome.otf", 'Exact': True, 'SymStart': 0xF000, 'SymEnd': 0xF2E0, 'SrcStart': None, 'ScaleRules': FONTA_SCALE_LIST, 'Attributes': SYM_ATTR_FONTA},
{'Enabled': self.args.fontawesomeextension, 'Name': "Font Awesome Extension", 'Filename': "font-awesome-extension.ttf", 'Exact': False, 'SymStart': 0xE000, 'SymEnd': 0xE0A9, 'SrcStart': 0xE200, 'ScaleRules': None, 'Attributes': SYM_ATTR_DEFAULT}, # Maximize
{'Enabled': self.args.powersymbols, 'Name': "Power Symbols", 'Filename': "Unicode_IEC_symbol_font.otf", 'Exact': True, 'SymStart': 0x23FB, 'SymEnd': 0x23FE, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_DEFAULT}, # Power, Power On/Off, Power On, Sleep
{'Enabled': self.args.powersymbols, 'Name': "Power Symbols", 'Filename': "Unicode_IEC_symbol_font.otf", 'Exact': True, 'SymStart': 0x2B58, 'SymEnd': 0x2B58, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_DEFAULT}, # Heavy Circle (aka Power Off)
{'Enabled': self.args.material, 'Name': "Material legacy", 'Filename': "materialdesignicons-webfont.ttf", 'Exact': False, 'SymStart': 0xF001, 'SymEnd': 0xF847, 'SrcStart': 0xF500, 'ScaleRules': None, 'Attributes': SYM_ATTR_DEFAULT},
{'Enabled': self.args.material, 'Name': "Material", 'Filename': "materialdesign/MaterialDesignIconsDesktop.ttf", 'Exact': True, 'SymStart': 0xF0001,'SymEnd': 0xF1AF0,'SrcStart': None, 'ScaleRules': MDI_SCALE_LIST, 'Attributes': SYM_ATTR_DEFAULT},
{'Enabled': self.args.weather, 'Name': "Weather Icons", 'Filename': "weather-icons/weathericons-regular-webfont.ttf", 'Exact': False, 'SymStart': 0xF000, 'SymEnd': 0xF0EB, 'SrcStart': 0xE300, 'ScaleRules': WEATH_SCALE_LIST, 'Attributes': SYM_ATTR_DEFAULT},
{'Enabled': self.args.fontlogos, 'Name': "Font Logos", 'Filename': "font-logos.ttf", 'Exact': True, 'SymStart': 0xF300, 'SymEnd': 0xF32F, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_DEFAULT},
{'Enabled': self.args.octicons, 'Name': "Octicons", 'Filename': "octicons.ttf", 'Exact': False, 'SymStart': 0xF000, 'SymEnd': 0xF105, 'SrcStart': 0xF400, 'ScaleRules': OCTI_SCALE_LIST, 'Attributes': SYM_ATTR_DEFAULT}, # Magnifying glass
{'Enabled': self.args.octicons, 'Name': "Octicons", 'Filename': "octicons.ttf", 'Exact': True, 'SymStart': 0x2665, 'SymEnd': 0x2665, 'SrcStart': None, 'ScaleRules': OCTI_SCALE_LIST, 'Attributes': SYM_ATTR_DEFAULT}, # Heart
{'Enabled': self.args.octicons, 'Name': "Octicons", 'Filename': "octicons.ttf", 'Exact': True, 'SymStart': 0X26A1, 'SymEnd': 0X26A1, 'SrcStart': None, 'ScaleRules': OCTI_SCALE_LIST, 'Attributes': SYM_ATTR_DEFAULT}, # Zap
{'Enabled': self.args.octicons, 'Name': "Octicons", 'Filename': "octicons.ttf", 'Exact': False, 'SymStart': 0xF27C, 'SymEnd': 0xF27C, 'SrcStart': 0xF4A9, 'ScaleRules': OCTI_SCALE_LIST, 'Attributes': SYM_ATTR_DEFAULT}, # Desktop
{'Enabled': self.args.codicons, 'Name': "Codicons", 'Filename': "codicons/codicon.ttf", 'Exact': True, 'SymStart': 0xEA60, 'SymEnd': 0xEBEB, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_DEFAULT},
{'Enabled': self.args.custom, 'Name': "Custom", 'Filename': self.args.custom, 'Exact': True, 'SymStart': 0x0000, 'SymEnd': 0x0000, 'SrcStart': None, 'ScaleRules': None, 'Attributes': CUSTOM_ATTR}
]
def improve_line_dimensions(self):
# Make the total line size even. This seems to make the powerline separators
# center more evenly.
if self.args.adjustLineHeight:
if (self.sourceFont.os2_winascent + self.sourceFont.os2_windescent) % 2 != 0:
# All three are equal before due to get_sourcefont_dimensions()
self.sourceFont.hhea_ascent += 1
self.sourceFont.os2_typoascent += 1
self.sourceFont.os2_winascent += 1
def add_glyphrefs_to_essential(self, unicode):
self.essential.add(unicode)
# According to fontforge spec, altuni is either None or a tuple of tuples
# Those tuples contained in altuni are of the following "format":
# (unicode-value, variation-selector, reserved-field)
altuni = self.sourceFont[unicode].altuni
if altuni is not None:
for altcode in [ v for v, s, r in altuni if v >= 0 ]:
# If alternate unicode already exists in self.essential,
# that means it has gone through this function before.
# Therefore we skip it to avoid infinite loop.
# A unicode value of -1 basically means unused and is also worth skipping.
if altcode not in self.essential:
self.add_glyphrefs_to_essential(altcode)
# From fontforge documentation:
# glyph.references return a tuple of tuples containing, for each reference in foreground,
# a glyph name, a transformation matrix, and whether the reference is currently selected.
references = self.sourceFont[unicode].references
for refcode in [ self.sourceFont[n].unicode for n, m, s in references ]:
if refcode not in self.essential and refcode >= 0:
self.add_glyphrefs_to_essential(refcode)
def get_essential_references(self):
"""Find glyphs that are needed for the basic glyphs"""
# Sometimes basic glyphs are constructed from multiple other glyphs.
# Find out which other glyphs are also needed to keep the basic
# glyphs intact.
# 0x00-0x17f is the Latin Extended-A range
basic_glyphs = set()
# Collect substitution destinations
for glyph in range(0x21, 0x17f + 1):
if not glyph in self.sourceFont:
continue
basic_glyphs.add(glyph)
for possub in self.sourceFont[glyph].getPosSub('*'):
if possub[1] == 'Substitution' or possub[1] == 'Ligature':
basic_glyphs.add(self.sourceFont[possub[2]].unicode)
basic_glyphs.discard(-1) # the .notdef glyph