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import io
import os
import re
import random
from fontTools.feaLib.builder import addOpenTypeFeaturesFromString
from fontTools.ttLib import TTFont, newTable, registerCustomTableClass, unregisterCustomTableClass
from fontTools.ttLib.tables.DefaultTable import DefaultTable
from fontTools.ttLib.tables._c_m_a_p import CmapSubtable
import pytest
DATA_DIR = os.path.join(os.path.abspath(os.path.dirname(__file__)), "data")
class CustomTableClass(DefaultTable):
def decompile(self, data, ttFont):
self.numbers = list(data)
def compile(self, ttFont):
return bytes(self.numbers)
# not testing XML read/write
table_C_U_S_T_ = CustomTableClass # alias for testing
TABLETAG = "CUST"
def normalize_TTX(string):
string = re.sub(' ttLibVersion=".*"', "", string)
string = re.sub('checkSumAdjustment value=".*"', "", string)
string = re.sub('modified value=".*"', "", string)
return string
def test_registerCustomTableClass():
font = TTFont()
font[TABLETAG] = newTable(TABLETAG)
font[TABLETAG].data = b"\x00\x01\xff"
f = io.BytesIO()
font.save(f)
f.seek(0)
assert font[TABLETAG].data == b"\x00\x01\xff"
registerCustomTableClass(TABLETAG, "ttFont_test", "CustomTableClass")
try:
font = TTFont(f)
assert font[TABLETAG].numbers == [0, 1, 255]
assert font[TABLETAG].compile(font) == b"\x00\x01\xff"
finally:
unregisterCustomTableClass(TABLETAG)
def test_registerCustomTableClassStandardName():
registerCustomTableClass(TABLETAG, "ttFont_test")
try:
font = TTFont()
font[TABLETAG] = newTable(TABLETAG)
font[TABLETAG].numbers = [4, 5, 6]
assert font[TABLETAG].compile(font) == b"\x04\x05\x06"
finally:
unregisterCustomTableClass(TABLETAG)
ttxTTF = r"""<?xml version="1.0" encoding="UTF-8"?>
<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.9.0">
<hmtx>
<mtx name=".notdef" width="300" lsb="0"/>
</hmtx>
</ttFont>
"""
ttxOTF = """<?xml version="1.0" encoding="UTF-8"?>
<ttFont sfntVersion="OTTO" ttLibVersion="4.9.0">
<hmtx>
<mtx name=".notdef" width="300" lsb="0"/>
</hmtx>
</ttFont>
"""
def test_sfntVersionFromTTX():
# https://github.com/fonttools/fonttools/issues/2370
font = TTFont()
assert font.sfntVersion == "\x00\x01\x00\x00"
ttx = io.StringIO(ttxOTF)
# Font is "empty", TTX file will determine sfntVersion
font.importXML(ttx)
assert font.sfntVersion == "OTTO"
ttx = io.StringIO(ttxTTF)
# Font is not "empty", sfntVersion in TTX file will be ignored
font.importXML(ttx)
assert font.sfntVersion == "OTTO"
def test_virtualGlyphId():
otfpath = os.path.join(DATA_DIR, "TestVGID-Regular.otf")
ttxpath = os.path.join(DATA_DIR, "TestVGID-Regular.ttx")
otf = TTFont(otfpath)
ttx = TTFont()
ttx.importXML(ttxpath)
with open(ttxpath, encoding="utf-8") as fp:
xml = normalize_TTX(fp.read()).splitlines()
for font in (otf, ttx):
GSUB = font["GSUB"].table
assert GSUB.LookupList.LookupCount == 37
lookup = GSUB.LookupList.Lookup[32]
assert lookup.LookupType == 8
subtable = lookup.SubTable[0]
assert subtable.LookAheadGlyphCount == 1
lookahead = subtable.LookAheadCoverage[0]
assert len(lookahead.glyphs) == 46
assert "glyph00453" in lookahead.glyphs
out = io.StringIO()
font.saveXML(out)
outxml = normalize_TTX(out.getvalue()).splitlines()
assert xml == outxml
def test_setGlyphOrder_also_updates_glyf_glyphOrder():
# https://github.com/fonttools/fonttools/issues/2060#issuecomment-1063932428
font = TTFont()
font.importXML(os.path.join(DATA_DIR, "TestTTF-Regular.ttx"))
current_order = font.getGlyphOrder()
assert current_order == font["glyf"].glyphOrder
new_order = list(current_order)
while new_order == current_order:
random.shuffle(new_order)
font.setGlyphOrder(new_order)
assert font.getGlyphOrder() == new_order
assert font["glyf"].glyphOrder == new_order
@pytest.mark.parametrize("lazy", [None, True, False])
def test_ensureDecompiled(lazy):
# test that no matter the lazy value, ensureDecompiled decompiles all tables
font = TTFont()
font.importXML(os.path.join(DATA_DIR, "TestTTF-Regular.ttx"))
# test font has no OTL so we add some, as an example of otData-driven tables
addOpenTypeFeaturesFromString(
font,
"""
feature calt {
sub period' period' period' space by ellipsis;
} calt;
feature dist {
pos period period -30;
} dist;
"""
)
# also add an additional cmap subtable that will be lazily-loaded
cm = CmapSubtable.newSubtable(14)
cm.platformID = 0
cm.platEncID = 5
cm.language = 0
cm.cmap = {}
cm.uvsDict = {0xFE00: [(0x002e, None)]}
font["cmap"].tables.append(cm)
# save and reload, potentially lazily
buf = io.BytesIO()
font.save(buf)
buf.seek(0)
font = TTFont(buf, lazy=lazy)
# check no table is loaded until/unless requested, no matter the laziness
for tag in font.keys():
assert not font.isLoaded(tag)
if lazy is not False:
# additional cmap doesn't get decompiled automatically unless lazy=False;
# can't use hasattr or else cmap's maginc __getattr__ kicks in...
cm = next(st for st in font["cmap"].tables if st.__dict__["format"] == 14)
assert cm.data is not None
assert "uvsDict" not in cm.__dict__
# glyf glyphs are not expanded unless lazy=False
assert font["glyf"].glyphs["period"].data is not None
assert not hasattr(font["glyf"].glyphs["period"], "coordinates")
if lazy is True:
# OTL tables hold a 'reader' to lazily load when lazy=True
assert "reader" in font["GSUB"].table.LookupList.__dict__
assert "reader" in font["GPOS"].table.LookupList.__dict__
font.ensureDecompiled()
# all tables are decompiled now
for tag in font.keys():
assert font.isLoaded(tag)
# including the additional cmap
cm = next(st for st in font["cmap"].tables if st.__dict__["format"] == 14)
assert cm.data is None
assert "uvsDict" in cm.__dict__
# expanded glyf glyphs lost the 'data' attribute
assert not hasattr(font["glyf"].glyphs["period"], "data")
assert hasattr(font["glyf"].glyphs["period"], "coordinates")
# and OTL tables have read their 'reader'
assert "reader" not in font["GSUB"].table.LookupList.__dict__
assert "Lookup" in font["GSUB"].table.LookupList.__dict__
assert "reader" not in font["GPOS"].table.LookupList.__dict__
assert "Lookup" in font["GPOS"].table.LookupList.__dict__
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