update NF batteries

This commit is contained in:
Daylin Morgan 2022-09-16 13:56:39 -05:00
parent 51a57bbbfa
commit 86020c4474
2 changed files with 107 additions and 54 deletions

View file

@ -1,23 +1,19 @@
#!/usr/bin/env python
# coding=utf8
# Nerd Fonts Version: 2.2.1
# Nerd Fonts Version: 2.2.2
# 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 = "3.0.3"
script_version = "3.0.6"
version = "2.2.1"
version = "2.2.2"
projectName = "Nerd Fonts"
projectNameAbbreviation = "NF"
projectNameSingular = projectName[:-1]
import sys
try:
import psMat
except ImportError:
sys.exit(projectName + ": FontForge module is probably not installed. [See: http://designwithfontforge.com/en-US/Installing_Fontforge.html]")
import re
import os
import argparse
@ -30,12 +26,13 @@ try:
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 python-fontforge`]"
"[e.g. on Linux Debian or Ubuntu: `sudo apt install fontforge python3-fontforge`]"
)
)
@ -167,6 +164,7 @@ class font_patcher:
self.font_dim = None # class 'dict'
self.onlybitmaps = 0
self.extension = ""
self.essential = set()
self.setup_arguments()
self.config = configparser.ConfigParser(empty_lines_in_values=False, allow_no_value=True)
if not os.path.isfile(self.args.font):
@ -181,6 +179,7 @@ class font_patcher:
except Exception:
sys.exit(projectName + ": Can not open font, try to open with fontforge interactively to get more information")
self.setup_version()
self.get_essential_references()
self.setup_name_backup()
self.remove_ligatures()
make_sure_path_exists(self.args.outputdir)
@ -219,6 +218,10 @@ class font_patcher:
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']:
@ -226,7 +229,13 @@ class font_patcher:
if symfont:
symfont.close()
symfont = None
symfont = fontforge.open(self.args.glyphdir + patch['Filename'])
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
@ -320,6 +329,7 @@ class font_patcher:
parser.add_argument('-out', '--outputdir', dest='outputdir', default=".", type=str, nargs='?', help='The directory to output the patched font file to')
parser.add_argument('--glyphdir', dest='glyphdir', default=__dir__ + "/src/glyphs/", type=str, nargs='?', help='Path to glyphs to be used for patching')
parser.add_argument('--makegroups', dest='makegroups', default=False, action='store_true', help='Use alternative method to name patched fonts (experimental)')
parser.add_argument('--variable-width-glyphs', dest='nonmono', default=False, action='store_true', help='Do not adjust advance width (no "overhang")')
# progress bar arguments - https://stackoverflow.com/questions/15008758/parsing-boolean-values-with-argparse
progressbars_group_parser = parser.add_mutually_exclusive_group(required=False)
@ -332,7 +342,7 @@ class font_patcher:
sym_font_group = parser.add_argument_group('Symbol Fonts')
sym_font_group.add_argument('--fontawesome', dest='fontawesome', default=False, action='store_true', help='Add Font Awesome Glyphs (http://fontawesome.io/)')
sym_font_group.add_argument('--fontawesomeextension', dest='fontawesomeextension', default=False, action='store_true', help='Add Font Awesome Extension Glyphs (https://andrelzgava.github.io/font-awesome-extension/)')
sym_font_group.add_argument('--fontlinux', '--fontlogos', dest='fontlinux', default=False, action='store_true', help='Add Font Linux and other open source Glyphs (https://github.com/Lukas-W/font-logos)')
sym_font_group.add_argument('--fontlogos', '--fontlinux', dest='fontlogos', default=False, action='store_true', help='Add Font Logos Glyphs (https://github.com/Lukas-W/font-logos)')
sym_font_group.add_argument('--octicons', dest='octicons', default=False, action='store_true', help='Add Octicons Glyphs (https://octicons.github.com)')
sym_font_group.add_argument('--codicons', dest='codicons', default=False, action='store_true', help='Add Codicons Glyphs (https://github.com/microsoft/vscode-codicons)')
sym_font_group.add_argument('--powersymbols', dest='powersymbols', default=False, action='store_true', help='Add IEC Power Symbols (https://unicodepowersymbol.com/)')
@ -351,7 +361,7 @@ class font_patcher:
if self.args.complete:
self.args.fontawesome = True
self.args.fontawesomeextension = True
self.args.fontlinux = True
self.args.fontlogos = True
self.args.octicons = True
self.args.codicons = True
self.args.powersymbols = True
@ -380,6 +390,10 @@ class font_patcher:
if self.args.alsowindows:
self.args.windows = False
if self.args.nonmono and self.args.single:
print("Warniung: Specified contradicting --variable-width-glyphs and --use-single-width-glyph. Ignoring --variable-width-glyphs.")
self.args.nonmono = False
# this one also works but it needs to be updated every time a font is added
# it was a conditional in self.setup_font_names() before, but it was missing
# a symbol font, so it would name the font complete without being so sometimes.
@ -389,7 +403,7 @@ class font_patcher:
# self.args.complete = all([
# self.args.fontawesome is True,
# self.args.fontawesomeextension is True,
# self.args.fontlinux is True,
# self.args.fontlogos is True,
# self.args.octicons is True,
# self.args.powersymbols is True,
# self.args.pomicons is True,
@ -436,9 +450,9 @@ class font_patcher:
if self.args.pomicons:
additionalFontNameSuffix += " P"
verboseAdditionalFontNameSuffix += " Plus Pomicons"
if self.args.fontlinux:
if self.args.fontlogos:
additionalFontNameSuffix += " L"
verboseAdditionalFontNameSuffix += " Plus Font Logos (Font Linux)"
verboseAdditionalFontNameSuffix += " Plus Font Logos"
if self.args.material:
additionalFontNameSuffix += " MDI"
verboseAdditionalFontNameSuffix += " Plus Material Design Icons"
@ -522,6 +536,8 @@ class font_patcher:
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
@ -673,7 +689,7 @@ class font_patcher:
# Supported params: overlap | careful
# Powerline dividers
SYM_ATTR_POWERLINE = {
'default': {'align': 'c', 'valign': 'c', 'stretch': 'pa', 'params': ''},
'default': {'align': 'c', 'valign': 'c', 'stretch': 'pa', 'params': {}},
# Arrow tips
0xe0b0: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {'overlap': 0.02}},
@ -706,23 +722,23 @@ class font_patcher:
0xe0c3: {'align': 'r', 'valign': 'c', 'stretch': 'xy', 'params': {'overlap': 0.01}},
# Small squares
0xe0c4: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': ''},
0xe0c5: {'align': 'r', 'valign': 'c', 'stretch': 'xy', 'params': ''},
0xe0c4: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {}},
0xe0c5: {'align': 'r', 'valign': 'c', 'stretch': 'xy', 'params': {}},
# Bigger squares
0xe0c6: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': ''},
0xe0c7: {'align': 'r', 'valign': 'c', 'stretch': 'xy', 'params': ''},
0xe0c6: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {}},
0xe0c7: {'align': 'r', 'valign': 'c', 'stretch': 'xy', 'params': {}},
# Waveform
0xe0c8: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {'overlap': 0.01}},
# Hexagons
0xe0cc: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': ''},
0xe0cd: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': ''},
0xe0cc: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {}},
0xe0cd: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {}},
# Legos
0xe0ce: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': ''},
0xe0cf: {'align': 'c', 'valign': 'c', 'stretch': 'xy', 'params': ''},
0xe0ce: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {}},
0xe0cf: {'align': 'c', 'valign': 'c', 'stretch': 'xy', 'params': {}},
0xe0d1: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {'overlap': 0.02}},
# Top and bottom trapezoid
@ -732,22 +748,22 @@ class font_patcher:
SYM_ATTR_DEFAULT = {
# 'pa' == preserve aspect ratio
'default': {'align': 'c', 'valign': 'c', 'stretch': 'pa', 'params': ''}
'default': {'align': 'c', 'valign': 'c', 'stretch': 'pa', 'params': {}}
}
SYM_ATTR_FONTA = {
# 'pa' == preserve aspect ratio
'default': {'align': 'c', 'valign': 'c', 'stretch': 'pa', 'params': ''},
'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': ''}
0xf0dc: {'align': 'c', 'valign': '', 'stretch': 'pa', 'params': {}},
0xf0dd: {'align': 'c', 'valign': '', 'stretch': 'pa', 'params': {}},
0xf0de: {'align': 'c', 'valign': '', 'stretch': 'pa', 'params': {}}
}
CUSTOM_ATTR = {
# 'pa' == preserve aspect ratio
'default': {'align': 'c', 'valign': '', 'stretch': '', 'params': ''}
'default': {'align': 'c', 'valign': '', 'stretch': '', 'params': {}}
}
# Most glyphs we want to maximize during the scale. However, there are some
@ -789,7 +805,7 @@ class font_patcher:
# 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': 0xE531, 'SrcStart': 0xE5FA, 'SrcEnd': 0xE631, 'ScaleGlyph': None, 'Attributes': SYM_ATTR_DEFAULT},
{'Enabled': True, 'Name': "Seti-UI + Custom", 'Filename': "original-source.otf", 'Exact': False, 'SymStart': 0xE4FA, 'SymEnd': 0xE534, 'SrcStart': 0xE5FA, 'SrcEnd': 0xE634, 'ScaleGlyph': None, 'Attributes': SYM_ATTR_DEFAULT},
{'Enabled': True, 'Name': "Devicons", 'Filename': "devicons.ttf", 'Exact': False, 'SymStart': 0xE600, 'SymEnd': 0xE6C5, 'SrcStart': 0xE700, 'SrcEnd': 0xE7C5, 'ScaleGlyph': 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, 'SrcEnd': None, 'ScaleGlyph': 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, 'SrcEnd': None, 'ScaleGlyph': None, 'Attributes': SYM_ATTR_POWERLINE},
@ -804,7 +820,7 @@ class font_patcher:
{'Enabled': self.args.powersymbols, 'Name': "Power Symbols", 'Filename': "Unicode_IEC_symbol_font.otf", 'Exact': True, 'SymStart': 0x2B58, 'SymEnd': 0x2B58, 'SrcStart': None, 'SrcEnd': None, 'ScaleGlyph': None, 'Attributes': SYM_ATTR_DEFAULT}, # Heavy Circle (aka Power Off)
{'Enabled': self.args.material, 'Name': "Material", 'Filename': "materialdesignicons-webfont.ttf", 'Exact': False, 'SymStart': 0xF001, 'SymEnd': 0xF847, 'SrcStart': 0xF500, 'SrcEnd': 0xFD46, 'ScaleGlyph': None, '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, 'SrcEnd': 0xE3EB, 'ScaleGlyph': None, 'Attributes': SYM_ATTR_DEFAULT},
{'Enabled': self.args.fontlinux, 'Name': "Font Logos (Font Linux)", 'Filename': "font-logos.ttf", 'Exact': True, 'SymStart': 0xF300, 'SymEnd': 0xF32F, 'SrcStart': None, 'SrcEnd': None , 'ScaleGlyph': None, 'Attributes': SYM_ATTR_DEFAULT},
{'Enabled': self.args.fontlogos, 'Name': "Font Logos", 'Filename': "font-logos.ttf", 'Exact': True, 'SymStart': 0xF300, 'SymEnd': 0xF32F, 'SrcStart': None, 'SrcEnd': None , 'ScaleGlyph': None, 'Attributes': SYM_ATTR_DEFAULT},
{'Enabled': self.args.octicons, 'Name': "Octicons", 'Filename': "octicons.ttf", 'Exact': self.octiconsExactEncodingPosition, 'SymStart': 0xF000, 'SymEnd': 0xF105, 'SrcStart': 0xF400, 'SrcEnd': 0xF505, 'ScaleGlyph': OCTI_SCALE_LIST, 'Attributes': SYM_ATTR_DEFAULT}, # Magnifying glass
{'Enabled': self.args.octicons, 'Name': "Octicons", 'Filename': "octicons.ttf", 'Exact': self.octiconsExactEncodingPosition, 'SymStart': 0x2665, 'SymEnd': 0x2665, 'SrcStart': None, 'SrcEnd': None, 'ScaleGlyph': OCTI_SCALE_LIST, 'Attributes': SYM_ATTR_DEFAULT}, # Heart
{'Enabled': self.args.octicons, 'Name': "Octicons", 'Filename': "octicons.ttf", 'Exact': self.octiconsExactEncodingPosition, 'SymStart': 0X26A1, 'SymEnd': 0X26A1, 'SrcStart': None, 'SrcEnd': None, 'ScaleGlyph': OCTI_SCALE_LIST, 'Attributes': SYM_ATTR_DEFAULT}, # Zap
@ -835,6 +851,17 @@ class font_patcher:
self.sourceFont.hhea_linegap = 0
self.sourceFont.os2_typolinegap = 0
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
for glyph in range(0x21, 0x17f):
if not glyph in self.sourceFont:
continue
for r in self.sourceFont[glyph].references:
self.essential.add(self.sourceFont[r[0]].unicode)
def get_sourcefont_dimensions(self):
# Initial font dimensions
@ -886,10 +913,7 @@ class font_patcher:
# We want to preserve x/y aspect ratio, so find biggest scale factor that allows symbol to fit
scale_ratio_x = self.font_dim['width'] / sym_dim['width']
# font_dim['height'] represents total line height, keep our symbols sized based upon font's em
# NOTE: is this comment correct? font_dim['height'] isn't used here
scale_ratio_y = self.sourceFont.em / sym_dim['height']
scale_ratio_y = self.font_dim['height'] / sym_dim['height']
if scale_ratio_x > scale_ratio_y:
scale_ratio = scale_ratio_y
else:
@ -927,6 +951,8 @@ class font_patcher:
if self.args.quiet is False:
sys.stdout.write("Adding " + str(max(1, glyphSetLength)) + " Glyphs from " + setName + " Set \n")
currentSourceFontGlyph = -1 # initialize for the exactEncoding case
for index, sym_glyph in enumerate(symbolFontSelection):
index = max(1, index)
@ -936,8 +962,17 @@ class font_patcher:
sym_attr = attributes['default']
if exactEncoding:
# use the exact same hex values for the source font as for the symbol font
currentSourceFontGlyph = sym_glyph.encoding
# Use the exact same hex values for the source font as for the symbol font.
# Problem is we do not know the codepoint of the sym_glyph and because it
# came from a selection.byGlyphs there might be skipped over glyphs.
# The iteration is still in the order of the selection by codepoint,
# so we take the next allowed codepoint of the current glyph
possible_codes = [ ]
if sym_glyph.unicode > currentSourceFontGlyph:
possible_codes += [ sym_glyph.unicode ]
if sym_glyph.altuni:
possible_codes += [ v for v, s, r in sym_glyph.altuni if v > currentSourceFontGlyph ]
currentSourceFontGlyph = min(possible_codes)
else:
# use source font defined hex values based on passed in start and end
currentSourceFontGlyph = sourceFontList[sourceFontCounter]
@ -952,10 +987,11 @@ class font_patcher:
sys.stdout.flush()
# check if a glyph already exists in this location
if careful or 'careful' in sym_attr['params']:
if careful or 'careful' in sym_attr['params'] or currentSourceFontGlyph in self.essential:
if currentSourceFontGlyph in self.sourceFont:
if self.args.quiet is False:
print(" Found existing Glyph at {:X}. Skipping...".format(currentSourceFontGlyph))
careful_type = 'essential' if currentSourceFontGlyph in self.essential else 'existing'
print(" Found {} Glyph at {:X}. Skipping...".format(careful_type, currentSourceFontGlyph))
# We don't want to touch anything so move to next Glyph
continue
else:
@ -1012,13 +1048,10 @@ class font_patcher:
# Currently stretching vertically for both monospace and double-width
scale_ratio_y = self.font_dim['height'] / sym_dim['height']
if 'overlap' in sym_attr['params']:
overlap = sym_attr['params']['overlap']
else:
overlap = 0
overlap = sym_attr['params'].get('overlap')
if scale_ratio_x != 1 or scale_ratio_y != 1:
if overlap != 0:
if overlap:
scale_ratio_x *= 1 + overlap
scale_ratio_y *= 1 + overlap
self.sourceFont[currentSourceFontGlyph].transform(psMat.scale(scale_ratio_x, scale_ratio_y))
@ -1044,7 +1077,7 @@ class font_patcher:
# Right align
x_align_distance += self.font_dim['width'] - sym_dim['width']
if overlap != 0:
if overlap:
overlap_width = self.font_dim['width'] * overlap
if sym_attr['align'] == 'l':
x_align_distance -= overlap_width
@ -1054,20 +1087,26 @@ class font_patcher:
align_matrix = psMat.translate(x_align_distance, y_align_distance)
self.sourceFont[currentSourceFontGlyph].transform(align_matrix)
# Ensure after horizontal adjustments and centering that the glyph
# does not overlap the bearings (edges)
if not overlap:
self.remove_glyph_neg_bearings(self.sourceFont[currentSourceFontGlyph])
# Needed for setting 'advance width' on each glyph so they do not overlap,
# also ensures the font is considered monospaced on Windows by setting the
# same width for all character glyphs. This needs to be done for all glyphs,
# even the ones that are empty and didn't go through the scaling operations.
# It should come after setting the glyph bearings
self.set_glyph_width_mono(self.sourceFont[currentSourceFontGlyph])
# Ensure after horizontal adjustments and centering that the glyph
# does not overlap the bearings (edges)
# Re-remove negative bearings for target font with variable advance width
if self.args.nonmono:
self.remove_glyph_neg_bearings(self.sourceFont[currentSourceFontGlyph])
# Check if the inserted glyph is scaled correctly for monospace
if self.args.single:
(xmin, _, xmax, _) = self.sourceFont[currentSourceFontGlyph].boundingBox()
if int(xmax - xmin) > self.font_dim['width'] * (1 + overlap):
if int(xmax - xmin) > self.font_dim['width'] * (1 + (overlap or 0)):
print("\n Warning: Scaled glyph U+{:X} wider than one monospace width ({} / {} (overlap {}))".format(
currentSourceFontGlyph, int(xmax - xmin), self.font_dim['width'], overlap))
@ -1114,11 +1153,15 @@ class font_patcher:
self.font_dim.width is set with self.get_sourcefont_dimensions().
"""
try:
# Fontforge handles the width change like this:
# - Keep existing left_side_bearing
# - Set width
# - Calculate and set new right_side_bearing
glyph.width = self.font_dim['width']
except:
pass
def prepareScaleGlyph(self, scaleGlyph, symbolFont):
def prepareScaleGlyph(self, scaleGlyph, symbolFont, destGlyph):
""" Prepare raw ScaleGlyph data for use """
# The GlyphData is a dict with these (possible) entries:
# 'GlyphsToScale': List of ((lists of glyph codes) or (ranges of glyph codes)) that shall be scaled
@ -1153,13 +1196,14 @@ class font_patcher:
else:
scaleGlyph['scales'] = []
for group in scaleGlyph['GlyphsToScale']:
sym_dim = get_multiglyph_boundingBox([ symbolFont[g] if g in symbolFont else None for g in group ])
sym_dim = get_multiglyph_boundingBox([ symbolFont[g] if g in symbolFont else None for g in group ], destGlyph)
scaleGlyph['scales'].append(self.get_scale_factor(sym_dim))
def get_glyph_scale(self, unicode_value, scaleGlyph, symbolFont):
""" Determines whether or not to use scaled glyphs for glyphs in passed glyph_list """
# Potentially destorys the contents of self.sourceFont[unicode_value]
if not 'scales' in scaleGlyph:
self.prepareScaleGlyph(scaleGlyph, symbolFont)
self.prepareScaleGlyph(scaleGlyph, symbolFont, self.sourceFont[unicode_value])
for glyph_list, scale in zip(scaleGlyph['GlyphsToScale'], scaleGlyph['scales']):
if unicode_value in glyph_list:
return scale
@ -1181,13 +1225,22 @@ def make_sure_path_exists(path):
if exception.errno != errno.EEXIST:
raise
def get_multiglyph_boundingBox(glyphs):
""" Returns dict of the dimensions of multiple glyphs combined """
def get_multiglyph_boundingBox(glyphs, destGlyph = None):
""" Returns dict of the dimensions of multiple glyphs combined(, as if they are copied into destGlyph) """
# If destGlyph is given the glyph(s) are first copied over into that
# glyph and measured in that font (to avoid rounding errors)
# Leaves the destGlyph in unknown state!
bbox = [ None, None, None, None ]
for glyph in glyphs:
if glyph is None:
# Glyph has been in defining range but is not in the actual font
continue
if destGlyph:
glyph.font.selection.select(glyph)
glyph.font.copy()
destGlyph.font.selection.select(destGlyph)
destGlyph.font.paste()
glyph = destGlyph
gbb = glyph.boundingBox()
bbox[0] = gbb[0] if bbox[0] is None or bbox[0] > gbb[0] else bbox[0]
bbox[1] = gbb[1] if bbox[1] is None or bbox[1] > gbb[1] else bbox[1]

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