def com_google_fonts_check_whitespace_ink(ttFont):
"""Whitespace glyphs have ink?"""
from fontbakery.utils import (get_glyph_name, glyph_has_ink)
# This checks that certain glyphs are empty.
# Some, but not all, are Unicode whitespace.
# code-points for all Unicode whitespace chars
# (according to Unicode 11.0 property list):
WHITESPACE_CHARACTERS = {
0x0009, 0x000A, 0x000B, 0x000C, 0x000D, 0x0020, 0x0085, 0x00A0, 0x1680,
0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007, 0x2008,
0x2009, 0x200A, 0x2028, 0x2029, 0x202F, 0x205F, 0x3000
}
# Code-points that do not have whitespace property, but
# should not have a drawing.
EXTRA_NON_DRAWING = {0x180E, 0x200B, 0x2060, 0xFEFF}
# Make the set of non drawing characters.
# OGHAM SPACE MARK U+1680 is removed as it is
# a whitespace that should have a drawing.
NON_DRAWING = WHITESPACE_CHARACTERS | EXTRA_NON_DRAWING - {0x1680}
passed = True
for codepoint in sorted(NON_DRAWING):
g = get_glyph_name(ttFont, codepoint)
if g is not None and glyph_has_ink(ttFont, g):
passed = False
yield FAIL,\
Message('has-ink',
f'Glyph "{g}" has ink.'
f' It needs to be replaced by an empty glyph.')
if passed:
yield PASS, "There is no whitespace glyph with ink."
def com_google_fonts_check_mandatory_glyphs(ttFont):
"""Font contains '.notdef' as its first glyph?"""
from fontbakery.utils import glyph_has_ink
passed = True
if ttFont.getGlyphOrder()[0] != ".notdef":
passed = False
yield WARN,\
Message('first-glyph',
"Font should contain the .notdef glyph as the first glyph.")
if ".notdef" in ttFont.getBestCmap().values():
passed = False
yield WARN,\
Message('codepoint',
f"Glyph '.notdef' should not have a Unicode codepoint value assigned,"
f" but got 0x{ttFont.getBestCmap().values()['.notdef']:04X}.")
if not glyph_has_ink(ttFont, ".notdef"):
passed = False
yield WARN,\
Message('empty',
"Glyph '.notdef' should contain a drawing, but it is empty.")
if passed:
yield PASS, "OK"
def com_google_fonts_check_mandatory_glyphs(ttFont):
"""Font contains .notdef as first glyph?
The OpenType specification v1.8.2 recommends that the first glyph is the
.notdef glyph without a codepoint assigned and with a drawing.
https://docs.microsoft.com/en-us/typography/opentype/spec/recom#glyph-0-the-notdef-glyph
Pre-v1.8, it was recommended that a font should also contain a .null, CR and
space glyph. This might have been relevant for applications on MacOS 9.
"""
from fontbakery.utils import glyph_has_ink
if (
ttFont.getGlyphOrder()[0] == ".notdef"
and ".notdef" not in ttFont.getBestCmap().values()
and glyph_has_ink(ttFont, ".notdef")
):
yield PASS, (
"Font contains the .notdef glyph as the first glyph, it does "
"not have a Unicode value assigned and contains a drawing."
)
else:
yield WARN, (
"Font should contain the .notdef glyph as the first glyph, "
"it should not have a Unicode value assigned and should "
"contain a drawing."
)
def com_google_fonts_check_mandatory_glyphs(ttFont):
"""Font contains .notdef as first glyph?
The OpenType specification v1.8.2 recommends that the first glyph is the
.notdef glyph without a codepoint assigned and with a drawing.
https://docs.microsoft.com/en-us/typography/opentype/spec/recom#glyph-0-the-notdef-glyph
Pre-v1.8, it was recommended that a font should also contain a .null, CR and
space glyph. This might have been relevant for applications on MacOS 9.
"""
from fontbakery.utils import glyph_has_ink
if (
ttFont.getGlyphOrder()[0] == ".notdef"
and ".notdef" not in ttFont.getBestCmap().values()
and glyph_has_ink(ttFont, ".notdef")
):
yield PASS, (
"Font contains the .notdef glyph as the first glyph, it does "
"not have a Unicode value assigned and contains a drawing."
)
else:
yield WARN, (
"Font should contain the .notdef glyph as the first glyph, "
"it should not have a Unicode value assigned and should "
"contain a drawing."
)
def test_glyph_has_ink():
from fontbakery.utils import glyph_has_ink
from fontTools.ttLib import TTFont
print() # so next line doesn't start with '.....'
cff_test_font = TTFont(
'data/test/source-sans-pro/OTF/SourceSansPro-Regular.otf')
print('Test if CFF glyph with ink has ink')
assert(glyph_has_ink(cff_test_font, '.notdef') is True)
print('Test if CFF glyph without ink has ink')
assert(glyph_has_ink(cff_test_font, 'space') is False)
ttf_test_font = TTFont(
'data/test/source-sans-pro/TTF/SourceSansPro-Regular.ttf')
print('Test if TTF glyph with ink has ink')
assert(glyph_has_ink(ttf_test_font, '.notdef') is True)
print('Test if TTF glyph without ink has ink')
assert(glyph_has_ink(ttf_test_font, 'space') is False)
def com_google_fonts_check_mandatory_glyphs(ttFont):
"""Font contains .notdef as first glyph?"""
from fontbakery.utils import glyph_has_ink
if (ttFont.getGlyphOrder()[0] == ".notdef"
and ".notdef" not in ttFont.getBestCmap().values()
and glyph_has_ink(ttFont, ".notdef")):
yield PASS, (
"Font contains the .notdef glyph as the first glyph, it does "
"not have a Unicode value assigned and contains a drawing.")
else:
yield WARN, (
"Font should contain the .notdef glyph as the first glyph, "
"it should not have a Unicode value assigned and should "
"contain a drawing.")
def com_google_fonts_check_049(ttFont):
"""Whitespace glyphs have ink?"""
from fontbakery.utils import get_glyph_name, glyph_has_ink
# code-points for all "whitespace" chars:
WHITESPACE_CHARACTERS = [
0x0009, 0x000A, 0x000B, 0x000C, 0x000D, 0x0020, 0x0085, 0x00A0, 0x1680,
0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007, 0x2008,
0x2009, 0x200A, 0x2028, 0x2029, 0x202F, 0x205F, 0x3000, 0x180E, 0x200B,
0x2060, 0xFEFF
]
failed = False
for codepoint in WHITESPACE_CHARACTERS:
g = get_glyph_name(ttFont, codepoint)
if g is not None and glyph_has_ink(ttFont, g):
failed = True
yield FAIL, ("Glyph \"{}\" has ink."
" It needs to be replaced by"
" an empty glyph.").format(g)
if not failed:
yield PASS, "There is no whitespace glyph with ink."
def com_google_fonts_check_whitespace_ink(ttFont):
"""Whitespace glyphs have ink?"""
from fontbakery.utils import get_glyph_name, glyph_has_ink
# code-points for all "whitespace" chars:
WHITESPACE_CHARACTERS = [
0x0009, 0x000A, 0x000B, 0x000C, 0x000D, 0x0020, 0x0085, 0x00A0, 0x1680,
0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007, 0x2008,
0x2009, 0x200A, 0x2028, 0x2029, 0x202F, 0x205F, 0x3000, 0x180E, 0x200B,
0x2060, 0xFEFF
]
failed = False
for codepoint in WHITESPACE_CHARACTERS:
g = get_glyph_name(ttFont, codepoint)
if g is not None and glyph_has_ink(ttFont, g):
failed = True
yield FAIL, ("Glyph \"{}\" has ink."
" It needs to be replaced by"
" an empty glyph.").format(g)
if not failed:
yield PASS, "There is no whitespace glyph with ink."
def test_glyph_has_ink():
from fontbakery.utils import glyph_has_ink
from fontTools.ttLib import TTFont
print() # so next line doesn't start with '.....'
cff_test_font = TTFont(TEST_FILE("source-sans-pro/OTF/SourceSansPro-Regular.otf"))
print('Test if CFF glyph with ink has ink')
assert(glyph_has_ink(cff_test_font, '.notdef') is True)
print('Test if CFF glyph without ink has ink')
assert(glyph_has_ink(cff_test_font, 'space') is False)
ttf_test_font = TTFont(TEST_FILE("source-sans-pro/TTF/SourceSansPro-Regular.ttf"))
print('Test if TTF glyph with ink has ink')
assert(glyph_has_ink(ttf_test_font, '.notdef') is True)
print('Test if TTF glyph without ink has ink')
assert(glyph_has_ink(ttf_test_font, 'space') is False)
cff2_test_font = TTFont(TEST_FILE("source-sans-pro/VAR/SourceSansVariable-Roman.otf"))
print('Test if CFF2 glyph with ink has ink')
assert(glyph_has_ink(cff2_test_font, '.notdef') is True)
print('Test if CFF2 glyph without ink has ink')
assert(glyph_has_ink(cff2_test_font, 'space') is False)
