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import os
from contextlib import contextmanager
from ctypes import (
c_ushort, c_ubyte, POINTER, cast,
)
from ttfautohint._compat import iterbytes
from ttfautohint import memory, StemWidthMode
from ttfautohint.info import (
MutableByteString, InfoData, info_name_id_5, build_info_string,
name_string_is_wide, INFO_PREFIX, insert_suffix
)
import pytest
@contextmanager
def create_ubyte_buffer(init):
size = c_ushort(len(init))
void_p = memory.malloc(size.value)
if not void_p: # pragma: no cover
raise MemoryError()
p = cast(void_p, POINTER(c_ubyte))
for i, b in enumerate(iterbytes(init)):
p[i] = b
string_p = POINTER(POINTER(c_ubyte))(p)
size_p = POINTER(c_ushort)(size)
yield MutableByteString(string_p, size_p)
memory.free(p)
@pytest.mark.parametrize(
"input_string",
[b"hello world", b""],
ids=["non-empty", "empty"]
)
class TestMutableByteString(object):
def test_tobytes(self, input_string):
with create_ubyte_buffer(input_string) as buf:
string = buf.tobytes()
assert isinstance(string, bytes)
assert string == input_string
assert len(string) == len(buf)
def test_frombytes(self, input_string):
with create_ubyte_buffer(input_string) as buf:
string = buf.tobytes()
suffix = b" abc"
new_string = string + suffix
buf.frombytes(string + suffix)
assert buf.tobytes().endswith(suffix)
assert len(buf) == (len(new_string))
TEST_VERSION = u"1.7"
TEST_INFO = INFO_PREFIX + u" (v%s)" % TEST_VERSION
TEST_INFO_DETAILED = TEST_INFO + (
u' -l 8 -r 50 -G 200 -x 14 -D latn -f none -w G -X ""')
@pytest.mark.parametrize(
"detailed_info",
[True, False],
ids=["detailed", "no_detailed"]
)
@pytest.mark.parametrize(
"font_version, previous_info, appendix",
[
("Version 1.000", "", ""),
("Version 1.000", "; ttfautohint (v1.5)", ""),
("Version 1.000", "; ttfautohint (v1.5)", "; foo bar"),
],
ids=[
"no-previous-info",
"previous-info-last",
"previous-info-not-last",
]
)
@pytest.mark.parametrize(
"plat_id, enc_id",
[(1, 0), (3, 1), (3, 10)],
)
def test_info_name_id_5(plat_id, enc_id, detailed_info, font_version,
previous_info, appendix):
info_string = TEST_INFO_DETAILED if detailed_info else TEST_INFO
info_data = InfoData(info_string)
initial_string = font_version + previous_info + appendix
encoding = "utf-16be" if name_string_is_wide(plat_id, enc_id) else "ascii"
with create_ubyte_buffer(initial_string.encode(encoding)) as buf:
info_name_id_5(plat_id, enc_id, buf, info_data)
new_string = buf.tobytes().decode(encoding)
assert new_string == (font_version + info_string + appendix)
def test_info_name_id_5_overflow():
# we don't modify the string if it would overflow max length
size = MutableByteString.max_length - len(TEST_INFO) + 1
string = b"\0" * size
with create_ubyte_buffer(string) as buf:
info_name_id_5(1, 0, buf, InfoData(TEST_INFO))
assert buf.tobytes() == string
def test_build_info_string_no_detail():
s = build_info_string(TEST_VERSION, detailed_info=False)
assert s == TEST_INFO
@pytest.mark.parametrize(
"options, expected",
[
({}, ' -l 8 -r 50 -G 200 -x 14 -D latn -f none -a qsq -X ""'),
({"dehint": True}, " -d"),
({"fallback_stem_width": 200}, (
' -l 8 -r 50 -G 200 -x 14 -H 200 -D latn -f none -a qsq -X ""')),
({"control_name": os.path.join("src", "my_control_file.txt")},
(' -l 8 -r 50 -G 200 -x 14 -D latn -f none'
' -m "my_control_file.txt" -a qsq -X ""')),
({"reference_name": os.path.join("build", "MyFont-Regular.ttf"),
"reference_index": 1},
(' -l 8 -r 50 -G 200 -x 14 -D latn -f none'
' -R "MyFont-Regular.ttf" -Z 1 -a qsq -X ""')),
({"gray_stem_width_mode": StemWidthMode.NATURAL},
(' -l 8 -r 50 -G 200 -x 14 -D latn -f none -a nsq -X ""')),
({"gray_stem_width_mode": StemWidthMode.STRONG},
(' -l 8 -r 50 -G 200 -x 14 -D latn -f none -a ssq -X ""')),
({"gdi_cleartype_stem_width_mode": StemWidthMode.NATURAL},
(' -l 8 -r 50 -G 200 -x 14 -D latn -f none -a qnq -X ""')),
({"gdi_cleartype_stem_width_mode": StemWidthMode.QUANTIZED},
(' -l 8 -r 50 -G 200 -x 14 -D latn -f none -a qqq -X ""')),
({"dw_cleartype_stem_width_mode": StemWidthMode.NATURAL},
(' -l 8 -r 50 -G 200 -x 14 -D latn -f none -a qsn -X ""')),
({"dw_cleartype_stem_width_mode": StemWidthMode.STRONG},
(' -l 8 -r 50 -G 200 -x 14 -D latn -f none -a qss -X ""')),
({"windows_compatibility": True},
(' -l 8 -r 50 -G 200 -x 14 -D latn -f none -a qsq -W -X ""')),
({"adjust_subglyphs": True},
(' -l 8 -r 50 -G 200 -x 14 -D latn -f none -a qsq -p -X ""')),
({"hint_composites": True},
(' -l 8 -r 50 -G 200 -x 14 -D latn -f none -a qsq -c -X ""')),
({"symbol": True},
(' -l 8 -r 50 -G 200 -x 14 -D latn -f none -a qsq -s -X ""')),
({"fallback_scaling": True},
(' -l 8 -r 50 -G 200 -x 14 -D latn -f none -a qsq -S -X ""')),
({"TTFA_info": True},
(' -l 8 -r 50 -G 200 -x 14 -D latn -f none -a qsq -t -X ""')),
({"x_height_snapping_exceptions": "6,13-17"},
(' -l 8 -r 50 -G 200 -x 14 -D latn -f none -a qsq -X "6,13-17"')),
],
ids=[
"default",
"dehint",
"fallback_stem_width",
"control_name",
"reference_name_and_index",
"gray_stem_width_mode_NATURAL",
"gray_stem_width_mode_STRONG",
"gdi_cleartype_stem_width_mode_NATURAL",
"gdi_cleartype_stem_width_mode_QUANTIZED",
"dw_cleartype_stem_width_mode_NATURAL",
"dw_cleartype_stem_width_mode_STRONG",
"windows_compatibility",
"adjust_subglyphs",
"hint_composites",
"symbol",
"fallback_scaling",
"TTFA_info",
"x_height_snapping_exceptions",
]
)
def test_build_info_string_detailed(options, expected):
s = build_info_string(TEST_VERSION, detailed_info=True, **options)
assert s == TEST_INFO + expected
@pytest.mark.parametrize(
"suffix, family_name, string, expected",
[
(b" Hinted", b"New Font", b"New Font", b"New Font Hinted"),
(b" Hinted", b"New Font", b"New Font Condensed",
b"New Font Hinted Condensed"),
(b" Hinted", b"New Font", b"FooBar",
b"FooBar Hinted"),
],
ids=[
"is-substring",
"insert-after-substring",
"no-substring",
]
)
def test_insert_suffix(suffix, family_name, string, expected):
with create_ubyte_buffer(string) as buf:
insert_suffix(suffix, family_name, buf)
new_string = buf.tobytes()
assert suffix in new_string
assert new_string == expected
def test_insert_suffix_overflows():
s = b"\0" * 0xFFFE
with create_ubyte_buffer(s) as buf:
insert_suffix(b"-H", b"Foo Bar", buf)
new_string = buf.tobytes()
assert new_string == s
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