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font-patcher
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font-patcher
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#!/usr/bin/env python
# coding=utf8
# Nerd Fonts Version: 3.2.1+++
# Change the script version* when you edit this script:
script_version = "4.14.3++++"
version = "3.2.1+++"
projectName = "Nerd Fonts"
debug = False
import sys
import os
import errno
import psMat
import fontforge
import random
import string
import re
import shutil
from enum import Enum
import logging
import math
from fontmeta import *
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 isinstance(where, 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,
'avgWidth': 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 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 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
logger.info("Setting Panose 'Family Kind' to 'Latin Text and Display' (was 'Any')")
font.os2_panose = tuple(panose)
if panose[0] == 2 and panose[3] != 9:
logger.info("Setting Panose 'Proportion' to 'Monospaced' (was '%s')", panose_proportion_to_text(panose[3]))
panose[3] = 9 # 3 (4th value) = proportion; 9 = monospaced
font.os2_panose = tuple(panose)
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):
self.sym_font_args = []
self.sourceFont = None # class 'fontforge.font'
self.patch_set = None # class 'list'
self.font_dim = None # class 'dict'
self.symbolsonly = False # Are we generating the SymbolsOnly font?
self.onlybitmaps = 0
self.essential = set()
def patch(self, font, family, variation):
self.sourceFont = font
self.setup_version(family, variation)
self.manipulate_hints(family)
self.get_essential_references()
self.get_sourcefont_dimensions()
self.setup_patch_set()
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
# 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 some Windows applications (e.g. 'cmd') that is not enough. But they seem to honour the Panose table
# https://forum.high-logic.com/postedfiles/Panose.pdf
force_panose_monospaced(self.sourceFont)
panose = list(self.sourceFont.os2_panose)
if panose[0] == 0 or panose[0] == 2: # 0 (1st value) = family kind; 0 = any (default); 2 = latin text and display
panose[0] = 2 # Assert kind
panose[3] = 9 # 3 (4th value) = propotion; 9 = monospaced
self.sourceFont.os2_panose = tuple(panose)
# Prevent opening and closing the fontforge font. Makes things faster when patching
# multiple ranges using the same symbol font.
PreviousSymbolFilename = ""
symfont = None
if variation == "Nerd":
for patch in self.patch_set:
if PreviousSymbolFilename != patch['Filename']:
# We have a new symbol font, so close the previous one if it exists
if symfont:
symfont.close()
symfont = None
symfont = fontforge.open(os.path.join("src/glyphs", patch['Filename']))
symfont.encoding = 'UnicodeFull'
# 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, infile, family, variation):
sourceFont = sourceFonts[0]
# the `PfEd-comments` flag is required for Fontforge to save '.comment' and '.fontlog'.
gen_flags = (str('opentype'), str('PfEd-comments'), str('no-FFTM-table'))
fontname = sourceFont.fullname
if not fontname:
fontname = sourceFont.cidfontname
outfile = os.path.normpath(os.path.join(
sanitize_filename("PatchedFonts\\" + family + variation + "\\", True),
sanitize_filename(fontname) + ".otf"))
# the `PfEd-comments` flag is required for Fontforge to save '.comment' and '.fontlog'.
bitmaps = str()
if len(self.sourceFont.bitmapSizes):
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(sourceFont.fullname, outfile)
# Adjust flags that can not be changed via fontforge
source_font = TableHEADWriter(infile)
dest_font = TableHEADWriter(outfile)
for idx in range(source_font.num_fonts):
logger.debug("Tweaking %d/%d", 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:
logger.debug("Changing flags from 0x%X to 0x%X", 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:
logger.debug("Changing lowestRecPPEM from %d to %d", dest_font.lowppem, source_font.lowppem)
dest_font.putshort(source_font.lowppem, 'lowestRecPPEM')
if dest_font.modified:
dest_font.reset_table_checksum()
if dest_font.modified:
dest_font.reset_full_checksum()
source_font.close()
dest_font.close()
logger.debug(message)
def setup_font_names(self, font, family, variation, splitcollection=True):
isItalic = font.fontname.endswith("Italic")
style = font.fontname.split("-")[1].removesuffix("Italic")
# the weight here is not following guideline !!!
if splitcollection:
familyname = family + " " + variation + " " + fsuffix[family][style]
weight = fweight[family][style]
else:
familyname = family + " " + variation
weight = weight[family][style]
if isItalic:
if weight == "Regular":
subFamily = "Italic"
else:
subFamily = weight + " Italic"
else:
subFamily = weight
fontname = (familyname + "-" + subFamily).replace(" ", "")
fullname = (familyname + " " + subFamily).replace(" ", " ")
familyname = familyname.removesuffix(" ")
if variation == "Nerd":
projectInfo = (
"* " + family + " Version: " + fontversion[family] + "\n"
"* Nerd Version: " + version + "\n"
"\n"
"Patched by LNKLEO"
)
else:
projectInfo = (
"* " + family + " Version: " + fontversion[family] + "\n"
"\n"
"Patched by LNKLEO"
)
while (font.sfnt_names[1][2] != familyname
or font.sfnt_names[2][2] != subFamily
or font.sfnt_names[-2][2] != familyname
or font.sfnt_names[-1][2] != subFamily
or font.fontname != fontname
or font.fullname != fullname
or font.familyname != familyname):
trick = lambda : ''.join(random.choice(string.ascii_letters) for i in range(len(subFamily)))
font.fontname = trick()
font.fullname = trick()
font.familyname = trick()
font.appendSFNTName(str('English (US)'), str('Fullname'), fullname)
font.appendSFNTName(str('English (US)'), str('SubFamily'), subFamily)
font.appendSFNTName(str('English (US)'), str('Family'), familyname)
font.appendSFNTName(str('English (US)'), str('Preferred Family'), familyname)
# font.appendSFNTName(str('English (US)'), str('Compatible Full'), fullname)
font.appendSFNTName(str('English (US)'), str('Preferred Styles'), subFamily)
font.fontname = fontname
font.fullname = fullname
font.familyname = familyname
if variation == "Nerd":
uniqueID = fontversion[family] + ";N" + version + ";" + uid[family] + ";NERD;LNKL;" + fontname
else:
uniqueID = fontversion[family] + "" + ";" + uid[family] + ";LNKL;" + fontname
font.appendSFNTName(str('English (US)'), str('UniqueID'), uniqueID)
font.appendSFNTName(str('English (US)'), str('Version'), self.sourceFont.version)
font.appendSFNTName(str('English (US)'), str('SubFamily'), subFamily)
font.os2_stylemap = 0
if weight == "Bold": # weight = "bold" or weight == "Heavy":
font.os2_stylemap = 0b1 << 5
elif weight == "Regular" and not isItalic:
font.os2_stylemap = 0b1 << 6
if isItalic:
font.os2_stylemap |= 0b1
font.weight = weight
font.comment = projectInfo
font.fontlog = projectInfo
def setup_version(self, family, variation):
""" Add the Nerd Font version to the original version """
print("Version was {}".format(self.sourceFont.version))
self.sourceFont.version = fontversion[family]
if variation == 'Nerd':
self.sourceFont.version += "[N" + 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(self.sourceFont.version))
def manipulate_hints(self, family):
""" Redo the hinting on some problematic glyphs """
if family in rehint.keys():
redo = rehint[family]
logger.debug("Working on {} rehinting rules (this may create a lot of fontforge warnings)".format(len(redo)))
count = 0
for gname in self.sourceFont:
for regex in redo:
if re.fullmatch(regex, gname):
glyph = self.sourceFont[gname]
glyph.autoHint()
glyph.autoInstr()
count += 1
break
logger.info("Rehinted {} glyphs".format(count))
def setup_patch_set(self):
if (debug):
self.patch_set = []
return
""" Creates list of dicts to with instructions on copying glyphs from each symbol font into self.sourceFont """
box_enabled = not self.symbolsonly # Box glyph only for monospaced and not for Symbols Only
box_keep = False
if box_enabled:
self.sourceFont.selection.select(("ranges",), 0x2500, 0x259f)
box_glyphs_target = len(list(self.sourceFont.selection))
box_glyphs_current = len(list(self.sourceFont.selection.byGlyphs))
if box_glyphs_target > box_glyphs_current:
# Sourcefont does not have all of these glyphs, do not mix sets (overwrite existing)
if box_glyphs_current > 0:
logger.debug("%d/%d box drawing glyphs will be replaced",
box_glyphs_current, box_glyphs_target)
box_enabled = True
else:
# Sourcefont does have all of these glyphs
# box_keep = True # just scale do not copy (need to scale to fit new cell size)
box_enabled = False # Cowardly not scaling existing glyphs, although the code would allow this
# Stretch 'xz' or 'pa' (preserve aspect ratio)
# Supported params: overlap | careful | xy-ratio | dont_copy | ypadding
# Overlap value is used horizontally but vertically limited to 0.01
# Careful does not overwrite/modify existing glyphs
# 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')
# '!' means do the 'pa' scaling even with non mono fonts (else it just scales down, never up)
# '^' means that scaling shall fill the whole cell and not only the icon-cap-height (for mono fonts, other always use the whole cell)
# Dont_copy does not overwrite existing glyphs but rescales the preexisting ones
#
# Be careful, stretch may not change within a ScaleRule!
SYM_ATTR_DEFAULT = {
'default': {'align': 'c', 'valign': 'c', 'stretch': 'pa', 'params': {}}
}
SYM_ATTR_POWERLINE = {
'default': {'align': 'c', 'valign': 'c', 'stretch': '^pa', 'params': {}},
# Arrow tips
0xe0b0: {'align': 'l', 'valign': 'c', 'stretch': '^xy', 'params': {'overlap': 0.06, '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': 0.06, 'xy-ratio': 0.7}},
0xe0b3: {'align': 'r', 'valign': 'c', 'stretch': '^xy', 'params': {'xy-ratio': 0.7}},
# Inverse arrow tips
0xe0d6: {'align': 'l', 'valign': 'c', 'stretch': '^xy', 'params': {'overlap': 0.05, 'xy-ratio': 0.7}},
0xe0d7: {'align': 'r', 'valign': 'c', 'stretch': '^xy', 'params': {'overlap': 0.05, 'xy-ratio': 0.7}},
# Rounded arcs
0xe0b4: {'align': 'l', 'valign': 'c', 'stretch': '^xy', 'params': {'overlap': 0.06, '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': 0.06, '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_TRIGRAPH = {
'default': {'align': 'c', 'valign': 'c', 'stretch': 'pa1!', 'params': {'overlap': -0.10, 'careful': True}}
}
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': '^pa1!', 'params': {'ypadding': 0.3, 'careful': True}}
}
SYM_ATTR_BOX = {
'default': {'align': 'c', 'valign': 'c', 'stretch': '^xy', 'params': {'overlap': 0.02, 'dont_copy': box_keep}},
# No overlap with checkered greys (commented out because that raises problems on rescaling clients)
# 0x2591: {'align': 'c', 'valign': 'c', 'stretch': 'xy', 'params': {'dont_copy': box_keep}},
# 0x2592: {'align': 'c', 'valign': 'c', 'stretch': 'xy', 'params': {'dont_copy': box_keep}},
# 0x2593: {'align': 'c', 'valign': 'c', 'stretch': 'xy', 'params': {'dont_copy': box_keep}},
}
CUSTOM_ATTR = {
# previous custom scaling => do not touch the icons
# 'default': {'align': 'c', 'valign': '', 'stretch': '', 'params': {}}
'default': {'align': 'c', 'valign': 'c', 'stretch': 'pa', 'params': {'careful': True}}
}
# 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.
# (- ScaleGroupsVert: Removed with this commit)
#
# 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.
BOX_SCALE_LIST = {'ScaleGroups': [
[*range(0x2500, 0x2570 + 1), *range(0x2574, 0x257f + 1)], # box drawing
range(0x2571, 0x2573 + 1), # diagonals
[*range(0x2580, 0x2590 + 1), 0x2594, 0x2595], # blocks
range(0x2591, 0x2593 + 1), # greys
range(0x2594, 0x259f + 1), # quards (Note: quard 2597 in Hack is wrong, scales like block!)
]}
CODI_SCALE_LIST = {'ScaleGroups': [
[0xea61, 0xeb13], # lightbulb
range(0xeab4, 0xeab7 + 1), # chevrons
[0xea7d, *range(0xea99, 0xeaa1 + 1), 0xebcb], # arrows
[0xeaa2, 0xeb9a, 0xec08, 0xec09], # bells
range(0xead4, 0xead6 + 1), # dot and arrow
[0xeb43, 0xec0b, 0xec0c], # (pull) request changes
range(0xeb6e, 0xeb71 + 1), # triangles
[*range(0xeb89, 0xeb8b + 1), 0xec07], # smallish dots
range(0xebd5, 0xebd7 + 1), # compasses
]}
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
]}
HEAVY_SCALE_LIST = {'ScaleGlyph': 0x2771, # widest bracket, horizontally
'GlyphsToScale': [
(0x276c, 0x2771) # all
]}
OCTI_SCALE_LIST = {'ScaleGroups': [
[*range(0xf03d, 0xf040 + 1), 0xf019, 0xf030, 0xf04a, 0xf051, 0xf071, 0xf08c ], # arrows
[0xF0E7, # Smily and ...
0xf044, 0xf05a, 0xf05b, 0xf0aa, # triangles
0xf052, 0xf053, 0xf296, 0xf2f0, # small stuff
0xf078, 0xf0a2, 0xf0a3, 0xf0a4, # chevrons
0xf0ca, 0xf081, 0xf092, # dash, X, github-text
],
[0xf09c, 0xf09f, 0xf0de], # bells
range(0xf2c2, 0xf2c5 + 1), # move to
[0xf07b, 0xf0a1, 0xf0d6, 0xf306], # bookmarks
]}
# 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 = None # Maybe later add some selected ScaleGroups
# Define the character ranges
# Symbol font ranges
self.patch_set = [
{'Name': "SetiUI+Custom", 'Filename': "original-source.otf", 'Exact': False, 'SymStart': 0xE4FA, 'SymEnd': 0xE5FF, 'SrcStart': 0xE5FA, 'ScaleRules': None, 'Attributes': SYM_ATTR_DEFAULT},
{'Name': "HeavyAngleBrackets", 'Filename': "extraglyphs.sfd", 'Exact': True, 'SymStart': 0x276C, 'SymEnd': 0x2771, 'SrcStart': None, 'ScaleRules': HEAVY_SCALE_LIST, 'Attributes': SYM_ATTR_HEAVYBRACKETS},
{'Name': "BoxDrawing", 'Filename': "extraglyphs.sfd", 'Exact': True, 'SymStart': 0x2500, 'SymEnd': 0x259F, 'SrcStart': None, 'ScaleRules': BOX_SCALE_LIST, 'Attributes': SYM_ATTR_BOX},
{'Name': "Devicons", 'Filename': "devicons/devicons.ttf", 'Exact': False, 'SymStart': 0xE600, 'SymEnd': 0xE6C5, 'SrcStart': 0xE700, 'ScaleRules': DEVI_SCALE_LIST, 'Attributes': SYM_ATTR_DEFAULT},
{'Name': "Powerline", 'Filename': "powerline-symbols/PowerlineSymbols.otf", 'Exact': True, 'SymStart': 0xE0A0, 'SymEnd': 0xE0A2, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_POWERLINE},
{'Name': "Powerline", 'Filename': "powerline-symbols/PowerlineSymbols.otf", 'Exact': True, 'SymStart': 0xE0B0, 'SymEnd': 0xE0B3, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_POWERLINE},
{'Name': "PowerlineExtra", 'Filename': "powerline-extra/PowerlineExtraSymbols.otf", 'Exact': True, 'SymStart': 0xE0A3, 'SymEnd': 0xE0A3, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_POWERLINE},
{'Name': "PowerlineExtra", 'Filename': "powerline-extra/PowerlineExtraSymbols.otf", 'Exact': True, 'SymStart': 0xE0B4, 'SymEnd': 0xE0C8, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_POWERLINE},
{'Name': "PowerlineExtra", 'Filename': "powerline-extra/PowerlineExtraSymbols.otf", 'Exact': True, 'SymStart': 0xE0CA, 'SymEnd': 0xE0CA, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_POWERLINE},
{'Name': "PowerlineExtra", 'Filename': "powerline-extra/PowerlineExtraSymbols.otf", 'Exact': True, 'SymStart': 0xE0CC, 'SymEnd': 0xE0D7, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_POWERLINE},
{'Name': "PowerlineExtra", 'Filename': "powerline-extra/PowerlineExtraSymbols.otf", 'Exact': True, 'SymStart': 0x2630, 'SymEnd': 0x2630, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_TRIGRAPH},
{'Name': "Pomicons", 'Filename': "pomicons/Pomicons.otf", 'Exact': True, 'SymStart': 0xE000, 'SymEnd': 0xE00A, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_DEFAULT},
{'Name': "FontAwesome", 'Filename': "font-awesome/FontAwesome.otf", 'Exact': True, 'SymStart': 0xED00, 'SymEnd': 0xF2FF, 'SrcStart': None, 'ScaleRules': FONTA_SCALE_LIST, 'Attributes': SYM_ATTR_FONTA},
{'Name': "FontAwesomeExtension", 'Filename': "font-awesome-extension.ttf", 'Exact': False, 'SymStart': 0xE000, 'SymEnd': 0xE0A9, 'SrcStart': 0xE200, 'ScaleRules': None, 'Attributes': SYM_ATTR_DEFAULT}, # Maximize
{'Name': "Power", '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
{'Name': "Power", '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)
{'Name': "Material", 'Filename': "materialdesign/MaterialDesignIconsDesktop.ttf", 'Exact': True, 'SymStart': 0xF0001,'SymEnd': 0xF1AF0,'SrcStart': None, 'ScaleRules': MDI_SCALE_LIST, 'Attributes': SYM_ATTR_DEFAULT},
{'Name': "Weather", 'Filename': "weather-icons/weathericons-regular-webfont.ttf", 'Exact': False, 'SymStart': 0xF000, 'SymEnd': 0xF0EB, 'SrcStart': 0xE300, 'ScaleRules': None, 'Attributes': SYM_ATTR_DEFAULT},
{'Name': "Logos", 'Filename': "font-logos.ttf", 'Exact': True, 'SymStart': 0xF300, 'SymEnd': 0xF375, 'SrcStart': None, 'ScaleRules': None, 'Attributes': SYM_ATTR_DEFAULT},
{'Name': "Octicons", 'Filename': "octicons/octicons.ttf", 'Exact': False, 'SymStart': 0xF000, 'SymEnd': 0xF105, 'SrcStart': 0xF400, 'ScaleRules': OCTI_SCALE_LIST, 'Attributes': SYM_ATTR_DEFAULT}, # Magnifying glass
{'Name': "Octicons", 'Filename': "octicons/octicons.ttf", 'Exact': True, 'SymStart': 0x2665, 'SymEnd': 0x2665, 'SrcStart': None, 'ScaleRules': OCTI_SCALE_LIST, 'Attributes': SYM_ATTR_DEFAULT}, # Heart
{'Name': "Octicons", 'Filename': "octicons/octicons.ttf", 'Exact': True, 'SymStart': 0x26A1, 'SymEnd': 0x26A1, 'SrcStart': None, 'ScaleRules': OCTI_SCALE_LIST, 'Attributes': SYM_ATTR_DEFAULT}, # Zap
{'Name': "Octicons", 'Filename': "octicons/octicons.ttf", 'Exact': False, 'SymStart': 0xF27C, 'SymEnd': 0xF306, 'SrcStart': 0xF4A9, 'ScaleRules': OCTI_SCALE_LIST, 'Attributes': SYM_ATTR_DEFAULT},
{'Name': "Codicons", 'Filename': "codicons/codicon.ttf", 'Exact': True, 'SymStart': 0xEA60, 'SymEnd': 0xEC1E, 'SrcStart': None, 'ScaleRules': CODI_SCALE_LIST, 'Attributes': SYM_ATTR_DEFAULT},
]
def improve_line_dimensions(self):
# Make the total line size even. This seems to make the powerline separators
# center more evenly.
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 (depending on ff version) whether the
# reference is currently selected.
references = self.sourceFont[unicode].references
for refcode in [ self.sourceFont[n].unicode for n, *_ in references ]: # tuple of 2 or 3 depending on ff version
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.
# 0x0000-0x017f is the Latin Extended-A range
# 0xfb00-0xfb06 are 'fi' and other ligatures
basic_glyphs = { c for c in range(0x21, 0x17f + 1) if c in self.sourceFont }
# Collect substitution destinations
for glyph in list(basic_glyphs) + [*range(0xfb00, 0xfb06 + 1)]:
if not glyph in self.sourceFont:
continue
for possub in self.sourceFont[glyph].getPosSub('*'):
if possub[1] == 'Substitution' or possub[1] == 'Ligature':
basic_glyphs.add(glyph)
basic_glyphs.add(self.sourceFont[possub[2]].unicode)
basic_glyphs.discard(-1) # the .notdef glyph
for glyph in basic_glyphs:
self.add_glyphrefs_to_essential(glyph)
def get_sourcefont_dimensions(self):
""" This gets the font dimensions (cell width and height), and makes them equal on all platforms """
# Step 1
# There are three ways to discribe the baseline to baseline distance
# (a.k.a. line spacing) of a font. That is all a kuddelmuddel
# and we try to sort this out here
# See also https://glyphsapp.com/learn/vertical-metrics
# See also https://github.com/source-foundry/font-line
(hhea_btb, typo_btb, win_btb, win_gap) = get_btb_metrics(self.sourceFont)
use_typo = self.sourceFont.os2_use_typo_metrics != 0
Metric = Enum('Metric', ['HHEA', 'TYPO', 'WIN'])
# We use either TYPO (1) or WIN (2) and compare with HHEA
# and use HHEA (0) if the fonts seems broken - no WIN, see #1056
our_btb = typo_btb if use_typo else win_btb
if our_btb == hhea_btb:
metrics = Metric.TYPO if use_typo else Metric.WIN # conforming font
elif abs(our_btb - hhea_btb) / our_btb < 0.03:
logger.info("Font vertical metrics slightly off (%.1f%)", (our_btb - hhea_btb) / our_btb * 100.0)
metrics = Metric.TYPO if use_typo else Metric.WIN
else:
# Try the other metric
our_btb = typo_btb if not use_typo else win_btb
if our_btb == hhea_btb:
metrics = Metric.TYPO if use_typo else Metric.WIN # conforming font
elif abs(our_btb - hhea_btb) / our_btb < 0.03:
logger.info("Font vertical metrics slightly off (%.1f%%)", (our_btb - hhea_btb) / our_btb * 100.0)
metrics = Metric.TYPO if use_typo else Metric.WIN
else:
# We trust the WIN metric more, see experiments in #1056
logger.warning("Font vertical metrics inconsistent (HHEA %d / TYPO %d / WIN %d), using WIN", hhea_btb, typo_btb, win_btb)
our_btb = win_btb
metrics = Metric.WIN
# print("FINI hhea {} typo {} win {} use {} {} {}".format(hhea_btb, typo_btb, win_btb, use_typo, our_btb != hhea_btb, self.sourceFont.fontname))
self.font_dim = {'xmin': 0, 'ymin': 0, 'xmax': 0, 'ymax': 0, 'width' : 0, 'height': 0, 'iconheight': 0, 'ypadding': 0}
if metrics == Metric.HHEA:
self.font_dim['ymin'] = self.sourceFont.hhea_descent - half_gap(self.sourceFont.hhea_linegap, False)
self.font_dim['ymax'] = self.sourceFont.hhea_ascent + half_gap(self.sourceFont.hhea_linegap, True)
elif metrics == Metric.TYPO:
self.font_dim['ymin'] = self.sourceFont.os2_typodescent - half_gap(self.sourceFont.os2_typolinegap, False)
self.font_dim['ymax'] = self.sourceFont.os2_typoascent + half_gap(self.sourceFont.os2_typolinegap, True)
elif metrics == Metric.WIN:
self.font_dim['ymin'] = -self.sourceFont.os2_windescent - half_gap(win_gap, False)
self.font_dim['ymax'] = self.sourceFont.os2_winascent + half_gap(win_gap, True)
else:
logger.debug("Metrics is strange")
pass # Will fail the metrics check some line later
# Calculate font height
self.font_dim['height'] = -self.font_dim['ymin'] + self.font_dim['ymax']
if self.font_dim['height'] == 0:
# This can only happen if the input font is empty
# Assume we are using our prepared templates
self.symbolsonly = True
self.font_dim = {
'xmin' : 0,
'ymin' : -self.sourceFont.descent,
'xmax' : self.sourceFont.em,
'ymax' : self.sourceFont.ascent,
'width' : self.sourceFont.em,
'height' : self.sourceFont.descent + self.sourceFont.ascent,
'iconheight': self.sourceFont.descent + self.sourceFont.ascent,
'ypadding' : 0,
}
our_btb = self.sourceFont.descent + self.sourceFont.ascent
if self.font_dim['height'] <= 0:
logger.critical("Can not detect sane font height")
sys.exit(1)
self.font_dim['iconheight'] = self.font_dim['height']
if self.sourceFont.capHeight > 0:
# Limit the icon height on monospaced fonts because very slender and tall icons render
# excessivly tall otherwise. We ignore that effect for the other variants because it
# does not look so much out of place there.
# Icons can be bigger than the letter capitals, but not the whole cell:
self.font_dim['iconheight'] = (self.sourceFont.capHeight * 2 + self.font_dim['height']) / 3
# Make all metrics equal
self.sourceFont.os2_typolinegap = 0
self.sourceFont.os2_typoascent = self.font_dim['ymax']
self.sourceFont.os2_typodescent = self.font_dim['ymin']
self.sourceFont.os2_winascent = self.sourceFont.os2_typoascent
self.sourceFont.os2_windescent = -self.sourceFont.os2_typodescent
self.sourceFont.hhea_ascent = self.sourceFont.os2_typoascent
self.sourceFont.hhea_descent = self.sourceFont.os2_typodescent
self.sourceFont.hhea_linegap = self.sourceFont.os2_typolinegap
self.sourceFont.os2_use_typo_metrics = 1
(check_hhea_btb, check_typo_btb, check_win_btb, _) = get_btb_metrics(self.sourceFont)
if check_hhea_btb != check_typo_btb or check_typo_btb != check_win_btb or check_win_btb != our_btb:
logger.critical("Error in baseline to baseline code detected")
sys.exit(1)
# Step 2
# Find the biggest char width and advance width
# 0x00-0x17f is the Latin Extended-A range
for glyph in range(0x21, 0x17f):
if glyph in range(0x7F, 0xBF) or glyph in [
0x132, 0x133, # IJ, ij (in Overpass Mono)
0x022, 0x027, 0x060, # Single and double quotes in Inconsolata LGC
0x0D0, 0x10F, 0x110, 0x111, 0x127, 0x13E, 0x140, 0x165, # Eth and others with stroke or caron in RobotoMono
0x149, # napostrophe in DaddyTimeMono
0x02D, # hyphen for Monofur
]:
continue # ignore special characters like '1/4' etc and some specifics
try:
(_, _, xmax, _) = self.sourceFont[glyph].boundingBox()
except TypeError:
continue
# print("WIDTH {:X} {} ({} {})".format(glyph, self.sourceFont[glyph].width, self.font_dim['width'], xmax))
if self.font_dim['width'] < self.sourceFont[glyph].width:
self.font_dim['width'] = self.sourceFont[glyph].width
# print("New MAXWIDTH-A {:X} {} -> {} {}".format(glyph, self.sourceFont[glyph].width, self.font_dim['width'], xmax))
if xmax > self.font_dim['xmax']:
self.font_dim['xmax'] = xmax
# print("New MAXWIDTH-B {:X} {} -> {} {}".format(glyph, self.sourceFont[glyph].width, self.font_dim['width'], xmax))
if self.font_dim['width'] < self.font_dim['xmax']:
logger.debug("Font has negative right side bearing in extended glyphs")
self.font_dim['xmax'] = self.font_dim['width'] # In fact 'xmax' is never used
if self.font_dim['width'] <= 0:
logger.critical("Can not detect sane font width")
sys.exit(1)
logger.debug("Final font cell dimensions %d w x %d h%s",
self.font_dim['width'], self.font_dim['height'],
' (with icon cell {} h)'.format(int(self.font_dim['iconheight'])) if self.font_dim['iconheight'] != self.font_dim['height'] else '')
def get_scale_factors(self, sym_dim, stretch):
""" Get scale in x and y as tuple """
# It is possible to have empty glyphs, so we need to skip those.
if not sym_dim['width'] or not sym_dim['height']:
return (1.0, 1.0)
target_width = self.font_dim['width']
scale_ratio_x = target_width / sym_dim['width']
# font_dim['height'] represents total line height, keep our symbols sized based upon font's em
# Use the font_dim['height'] only for explicit 'y' scaling (not 'pa')
target_height = self.font_dim['height'] if '^' in stretch else self.font_dim['iconheight']
target_height *= 1.0 - self.font_dim['ypadding']
scale_ratio_y = target_height / sym_dim['height']
if 'pa' in stretch:
# We want to preserve x/y aspect ratio, so find biggest scale factor that allows symbol to fit
scale_ratio_x = min(scale_ratio_x, scale_ratio_y)
scale_ratio_y = scale_ratio_x
else:
# Keep the not-stretched direction
if not 'x' in stretch:
scale_ratio_x = 1.0
if not 'y' in stretch:
scale_ratio_y = 1.0
return (scale_ratio_x, scale_ratio_y)
def copy_glyphs(self, sourceFontStart, symbolFont, symbolFontStart, symbolFontEnd, exactEncoding, scaleRules, setName, attributes):
""" Copies symbol glyphs into self.sourceFont """
progressText = ''
careful = False
sourceFontCounter = 0
# Create glyphs from symbol font
#
# If we are going to copy all Glyphs, then assume we want to be careful
# and only copy those that are not already contained in the source font
if symbolFontStart == 0:
symbolFont.selection.all()
careful = True
else:
symbolFont.selection.select((str("ranges"), str("unicode")), symbolFontStart, symbolFontEnd)
# Get number of selected non-empty glyphs with codes >=0 (i.e. not -1 == notdef)
symbolFontSelection = [ x for x in symbolFont.selection.byGlyphs if x.unicode >= 0 ]
glyphSetLength = len(symbolFontSelection)
modify = attributes['default']['params'].get('dont_copy')
sys.stdout.write("{} {} Glyphs from {} Set\n".format(
"Adding" if not modify else "Rescaling", glyphSetLength, setName))
currentSourceFontGlyph = -1 # initialize for the exactEncoding case
for index, sym_glyph in enumerate(symbolFontSelection):
sym_attr = attributes.get(sym_glyph.unicode)
if sym_attr is None:
sym_attr = attributes['default']
if exactEncoding:
# 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 ]
if len(possible_codes) == 0:
logger.warning("Can not determine codepoint of %X. Skipping...", sym_glyph.unicode)
continue
currentSourceFontGlyph = min(possible_codes)
else:
# use source font defined hex values based on passed in start (fills gaps; symbols are packed)
currentSourceFontGlyph = sourceFontStart + sourceFontCounter
sourceFontCounter += 1
# For debugging process only limited glyphs
# if currentSourceFontGlyph != 0xe7bd:
# continue
ypadding = sym_attr['params'].get('ypadding')
self.font_dim['ypadding'] = ypadding or 0.0
update_progress(round(float(index + 1) / glyphSetLength, 4))
# check if a glyph already exists in this location
do_careful = sym_attr['params'].get('careful', careful) # params take precedence
if do_careful or currentSourceFontGlyph in self.essential:
if currentSourceFontGlyph in self.sourceFont:
careful_type = 'essential' if currentSourceFontGlyph in self.essential else 'existing'
# logger.debug("Found %s Glyph at %X. Skipping...", careful_type, currentSourceFontGlyph)
# # We don't want to touch anything so move to next Glyph
# continue
logger.debug("Found %s Glyph at %X. Replacing...", careful_type, currentSourceFontGlyph)
# else:
if True:
# If we overwrite an existing glyph all subtable entries regarding it will be wrong
# (Probably; at least if we add a symbol and do not substitude a ligature or such)
if currentSourceFontGlyph in self.sourceFont:
self.sourceFont[currentSourceFontGlyph].removePosSub("*")
stretch = sym_attr['stretch']
dont_copy = sym_attr['params'].get('dont_copy')
if dont_copy:
# Just prepare scaling of existing glyphs
glyph_scale_data = self.get_glyph_scale(sym_glyph.encoding, scaleRules, stretch, self.sourceFont, currentSourceFontGlyph) if scaleRules is not None else None
else:
# Break apart multiple unicodes linking to one glyph
if currentSourceFontGlyph in self.sourceFont:
altuni = self.sourceFont[currentSourceFontGlyph].altuni
if altuni:
codes = { v for v, s, r in altuni if v >= 0 }
codes.add(self.sourceFont[currentSourceFontGlyph].unicode)
codes.remove(currentSourceFontGlyph)
codes = [ "{:04X}".format(c) for c in sorted(list(codes)) ]
logger.debug("Removing alternate unicode on %X (%s)", currentSourceFontGlyph, ' '.join(codes));
self.sourceFont[currentSourceFontGlyph].altuni = None
self.sourceFont.encoding = 'UnicodeFull' # Rebuild encoding table (needed after altuni changes)
# This will destroy any content currently in currentSourceFontGlyph, so do it first
glyph_scale_data = self.get_glyph_scale(sym_glyph.encoding, scaleRules, stretch, symbolFont, currentSourceFontGlyph) if scaleRules is not None else None
# Select and copy symbol from its encoding point
# We need to do this select after the careful check, this way we don't
# reset our selection before starting the next loop
symbolFont.selection.select(sym_glyph.encoding)
symbolFont.copy()
# Paste it
self.sourceFont.selection.select(currentSourceFontGlyph)