def test_additional_metadata(self):
# these should not crash. Seriously dummy data, most of it doesn't make
# any sense, so we're running up against limits where we're asking
# libtiff to do stupid things.
# Get the list of the ones that we should be able to write
core_items = {
tag: info
for tag, info in ((s, TiffTags.lookup(s))
for s in TiffTags.LIBTIFF_CORE)
if info.type is not None
}
# Exclude ones that have special meaning
# that we're already testing them
im = Image.open('Tests/images/hopper_g4.tif')
for tag in im.tag_v2:
try:
del (core_items[tag])
except KeyError:
pass
# Type codes:
# 2: "ascii",
# 3: "short",
# 4: "long",
# 5: "rational",
# 12: "double",
# type: dummy value
values = {
2: 'test',
3: 1,
4: 2**20,
5: TiffImagePlugin.IFDRational(100, 1),
12: 1.05
}
new_ifd = TiffImagePlugin.ImageFileDirectory_v2()
for tag, info in core_items.items():
if info.length == 1:
new_ifd[tag] = values[info.type]
if info.length == 0:
new_ifd[tag] = tuple(values[info.type] for _ in range(3))
else:
new_ifd[tag] = tuple(values[info.type]
for _ in range(info.length))
# Extra samples really doesn't make sense in this application.
del (new_ifd[338])
out = self.tempfile("temp.tif")
TiffImagePlugin.WRITE_LIBTIFF = True
im.save(out, tiffinfo=new_ifd)
TiffImagePlugin.WRITE_LIBTIFF = False
def test_exif_div_zero(self):
im = hopper()
info = TiffImagePlugin.ImageFileDirectory_v2()
info[41988] = TiffImagePlugin.IFDRational(0, 0)
out = self.tempfile('temp.tiff')
im.save(out, tiffinfo=info, compression='raw')
reloaded = Image.open(out)
self.assertEqual(0, reloaded.tag_v2[41988].numerator)
self.assertEqual(0, reloaded.tag_v2[41988].denominator)
def test_empty_metadata(self):
f = io.BytesIO(b'II*\x00\x08\x00\x00\x00')
head = f.read(8)
info = TiffImagePlugin.ImageFileDirectory(head)
try:
self.assert_warning(UserWarning, info.load, f)
except struct.error:
self.fail("Should not be struct errors there.")
def test_too_many_entries(self):
ifd = TiffImagePlugin.ImageFileDirectory_v2()
# 277: ("SamplesPerPixel", SHORT, 1),
ifd._tagdata[277] = struct.pack('hh', 4, 4)
ifd.tagtype[277] = TiffTags.SHORT
try:
self.assert_warning(UserWarning, lambda: ifd[277])
except ValueError:
self.fail("Invalid Metadata count should not cause a Value Error.")
def test_expty_values(self):
data = io.BytesIO(
b'II*\x00\x08\x00\x00\x00\x03\x00\x1a\x01\x05\x00\x00\x00\x00\x00'
b'\x00\x00\x00\x00\x1b\x01\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00'
b'\x98\x82\x02\x00\x07\x00\x00\x002\x00\x00\x00\x00\x00\x00\x00a '
b'text\x00\x00')
head = data.read(8)
info = TiffImagePlugin.ImageFileDirectory_v2(head)
info.load(data)
try:
info = dict(info)
except ValueError:
self.fail("Should not be struct value error there.")
self.assertIn(33432, info)
def test_set_legacy_api(self):
ifd = TiffImagePlugin.ImageFileDirectory_v2()
with self.assertRaises(Exception) as e:
ifd.legacy_api = None
self.assertEqual(str(e.exception),
"Not allowing setting of legacy api")
def test_load_double(self):
ifd = TiffImagePlugin.ImageFileDirectory_v2()
data = b"abcdefghabcdefgh"
ret = ifd.load_double(data, False)
self.assertEqual(ret, (8.540883223036124e+194, 8.540883223036124e+194))
def test_load_float(self):
ifd = TiffImagePlugin.ImageFileDirectory_v2()
data = b"abcdabcd"
ret = ifd.load_float(data, False)
self.assertEqual(ret, (1.6777999408082104e+22, 1.6777999408082104e+22))
def test_load_string(self):
ifd = TiffImagePlugin.ImageFileDirectory_v2()
data = b"abc\0"
ret = ifd.load_string(data, False)
self.assertEqual(ret, "abc")
def test_load_byte(self):
for legacy_api in [False, True]:
ifd = TiffImagePlugin.ImageFileDirectory_v2()
data = b"abc"
ret = ifd.load_byte(data, legacy_api)
self.assertEqual(ret, b"abc")
def test_rt_metadata(self):
""" Test writing arbitrary metadata into the tiff image directory
Use case is ImageJ private tags, one numeric, one arbitrary
data. https://github.com/python-pillow/Pillow2/issues/291
"""
img = hopper()
# Behaviour change: re #1416
# Pre ifd rewrite, ImageJMetaData was being written as a string(2),
# Post ifd rewrite, it's defined as arbitrary bytes(7). It should
# roundtrip with the actual bytes, rather than stripped text
# of the premerge tests.
#
# For text items, we still have to decode('ascii','replace') because
# the tiff file format can't take 8 bit bytes in that field.
basetextdata = "This is some arbitrary metadata for a text field"
bindata = basetextdata.encode('ascii') + b" \xff"
textdata = basetextdata + " " + chr(255)
reloaded_textdata = basetextdata + " ?"
floatdata = 12.345
doubledata = 67.89
info = TiffImagePlugin.ImageFileDirectory()
ImageJMetaData = tag_ids['ImageJMetaData']
ImageJMetaDataByteCounts = tag_ids['ImageJMetaDataByteCounts']
ImageDescription = tag_ids['ImageDescription']
info[ImageJMetaDataByteCounts] = len(bindata)
info[ImageJMetaData] = bindata
info[tag_ids['RollAngle']] = floatdata
info.tagtype[tag_ids['RollAngle']] = 11
info[tag_ids['YawAngle']] = doubledata
info.tagtype[tag_ids['YawAngle']] = 12
info[ImageDescription] = textdata
f = self.tempfile("temp.tif")
img.save(f, tiffinfo=info)
loaded = Image.open(f)
self.assertEqual(loaded.tag[ImageJMetaDataByteCounts],
(len(bindata), ))
self.assertEqual(loaded.tag_v2[ImageJMetaDataByteCounts],
(len(bindata), ))
self.assertEqual(loaded.tag[ImageJMetaData], bindata)
self.assertEqual(loaded.tag_v2[ImageJMetaData], bindata)
self.assertEqual(loaded.tag[ImageDescription], (reloaded_textdata, ))
self.assertEqual(loaded.tag_v2[ImageDescription], reloaded_textdata)
loaded_float = loaded.tag[tag_ids['RollAngle']][0]
self.assertAlmostEqual(loaded_float, floatdata, places=5)
loaded_double = loaded.tag[tag_ids['YawAngle']][0]
self.assertAlmostEqual(loaded_double, doubledata)
# check with 2 element ImageJMetaDataByteCounts, issue #2006
info[ImageJMetaDataByteCounts] = (8, len(bindata) - 8)
img.save(f, tiffinfo=info)
loaded = Image.open(f)
self.assertEqual(loaded.tag[ImageJMetaDataByteCounts],
(8, len(bindata) - 8))
self.assertEqual(loaded.tag_v2[ImageJMetaDataByteCounts],
(8, len(bindata) - 8))