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Merge pull request #8000 from radarhere/libtiff

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Hugo van Kemenade 2024-04-22 22:56:30 +03:00 committed by GitHub
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1 changed files with 51 additions and 44 deletions
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95
Tests/test_file_libtiff.py
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@ -242,7 +242,24 @@ class TestFileLibTiff(LibTiffTestCase):
im.save(out, tiffinfo=new_ifd)
def test_custom_metadata(self, tmp_path: Path) -> None:
@pytest.mark.parametrize(
"libtiff",
(
pytest.param(
True,
marks=pytest.mark.skipif(
not getattr(Image.core, "libtiff_support_custom_tags", False),
reason="Custom tags not supported by older libtiff",
),
),
False,
),
)
def test_custom_metadata(
self, monkeypatch: pytest.MonkeyPatch, tmp_path: Path, libtiff: bool
) -> None:
monkeypatch.setattr(TiffImagePlugin, "WRITE_LIBTIFF", libtiff)
class Tc(NamedTuple):
value: Any
type: int
@ -281,53 +298,43 @@ class TestFileLibTiff(LibTiffTestCase):
)
}
libtiffs = [False]
if Image.core.libtiff_support_custom_tags:
libtiffs.append(True)
def check_tags(
tiffinfo: TiffImagePlugin.ImageFileDirectory_v2 | dict[int, str]
) -> None:
im = hopper()
for libtiff in libtiffs:
TiffImagePlugin.WRITE_LIBTIFF = libtiff
out = str(tmp_path / "temp.tif")
im.save(out, tiffinfo=tiffinfo)
def check_tags(
tiffinfo: TiffImagePlugin.ImageFileDirectory_v2 | dict[int, str]
) -> None:
im = hopper()
with Image.open(out) as reloaded:
for tag, value in tiffinfo.items():
reloaded_value = reloaded.tag_v2[tag]
if (
isinstance(reloaded_value, TiffImagePlugin.IFDRational)
and libtiff
):
# libtiff does not support real RATIONALS
assert round(abs(float(reloaded_value) - float(value)), 7) == 0
continue
out = str(tmp_path / "temp.tif")
im.save(out, tiffinfo=tiffinfo)
assert reloaded_value == value
with Image.open(out) as reloaded:
for tag, value in tiffinfo.items():
reloaded_value = reloaded.tag_v2[tag]
if (
isinstance(reloaded_value, TiffImagePlugin.IFDRational)
and libtiff
):
# libtiff does not support real RATIONALS
assert (
round(abs(float(reloaded_value) - float(value)), 7) == 0
)
continue
# Test with types
ifd = TiffImagePlugin.ImageFileDirectory_v2()
for tag, tagdata in custom.items():
ifd[tag] = tagdata.value
ifd.tagtype[tag] = tagdata.type
check_tags(ifd)
assert reloaded_value == value
# Test with types
ifd = TiffImagePlugin.ImageFileDirectory_v2()
for tag, tagdata in custom.items():
ifd[tag] = tagdata.value
ifd.tagtype[tag] = tagdata.type
check_tags(ifd)
# Test without types. This only works for some types, int for example are
# always encoded as LONG and not SIGNED_LONG.
check_tags(
{
tag: tagdata.value
for tag, tagdata in custom.items()
if tagdata.supported_by_default
}
)
TiffImagePlugin.WRITE_LIBTIFF = False
# Test without types. This only works for some types, int for example are
# always encoded as LONG and not SIGNED_LONG.
check_tags(
{
tag: tagdata.value
for tag, tagdata in custom.items()
if tagdata.supported_by_default
}
)
def test_osubfiletype(self, tmp_path: Path) -> None:
outfile = str(tmp_path / "temp.tif")
@ -741,7 +748,7 @@ class TestFileLibTiff(LibTiffTestCase):
pytest.param(
True,
marks=pytest.mark.skipif(
not Image.core.libtiff_support_custom_tags,
not getattr(Image.core, "libtiff_support_custom_tags", False),
reason="Custom tags not supported by older libtiff",
),
),