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Pillow/Tests/test_file_tiff.py
Andrew Murray 42588a6493 Skip test if libtiff is not installed
2019-06-30 13:26:58 +10:00

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import logging
from io import BytesIO
import sys
from .helper import unittest, PillowTestCase, hopper
from PIL import Image, TiffImagePlugin, features
from PIL._util import py3
from PIL.TiffImagePlugin import X_RESOLUTION, Y_RESOLUTION, RESOLUTION_UNIT
logger = logging.getLogger(__name__)
class TestFileTiff(PillowTestCase):
def test_sanity(self):
filename = self.tempfile("temp.tif")
hopper("RGB").save(filename)
im = Image.open(filename)
im.load()
self.assertEqual(im.mode, "RGB")
self.assertEqual(im.size, (128, 128))
self.assertEqual(im.format, "TIFF")
hopper("1").save(filename)
Image.open(filename)
hopper("L").save(filename)
Image.open(filename)
hopper("P").save(filename)
Image.open(filename)
hopper("RGB").save(filename)
Image.open(filename)
hopper("I").save(filename)
Image.open(filename)
def test_unclosed_file(self):
def open():
im = Image.open("Tests/images/multipage.tiff")
im.load()
self.assert_warning(None, open)
def test_mac_tiff(self):
# Read RGBa images from macOS [@PIL136]
filename = "Tests/images/pil136.tiff"
im = Image.open(filename)
self.assertEqual(im.mode, "RGBA")
self.assertEqual(im.size, (55, 43))
self.assertEqual(im.tile, [("raw", (0, 0, 55, 43), 8, ("RGBa", 0, 1))])
im.load()
self.assert_image_similar_tofile(im, "Tests/images/pil136.png", 1)
def test_wrong_bits_per_sample(self):
im = Image.open("Tests/images/tiff_wrong_bits_per_sample.tiff")
self.assertEqual(im.mode, "RGBA")
self.assertEqual(im.size, (52, 53))
self.assertEqual(im.tile, [("raw", (0, 0, 52, 53), 160, ("RGBA", 0, 1))])
im.load()
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_size(self):
filename = "Tests/images/pil168.tif"
im = Image.open(filename)
def set_size():
im.size = (256, 256)
self.assert_warning(DeprecationWarning, set_size)
def test_xyres_tiff(self):
filename = "Tests/images/pil168.tif"
im = Image.open(filename)
# legacy api
self.assertIsInstance(im.tag[X_RESOLUTION][0], tuple)
self.assertIsInstance(im.tag[Y_RESOLUTION][0], tuple)
# v2 api
self.assertIsInstance(im.tag_v2[X_RESOLUTION], TiffImagePlugin.IFDRational)
self.assertIsInstance(im.tag_v2[Y_RESOLUTION], TiffImagePlugin.IFDRational)
self.assertEqual(im.info["dpi"], (72.0, 72.0))
def test_xyres_fallback_tiff(self):
filename = "Tests/images/compression.tif"
im = Image.open(filename)
# v2 api
self.assertIsInstance(im.tag_v2[X_RESOLUTION], TiffImagePlugin.IFDRational)
self.assertIsInstance(im.tag_v2[Y_RESOLUTION], TiffImagePlugin.IFDRational)
self.assertRaises(KeyError, lambda: im.tag_v2[RESOLUTION_UNIT])
# Legacy.
self.assertEqual(im.info["resolution"], (100.0, 100.0))
# Fallback "inch".
self.assertEqual(im.info["dpi"], (100.0, 100.0))
def test_int_resolution(self):
filename = "Tests/images/pil168.tif"
im = Image.open(filename)
# Try to read a file where X,Y_RESOLUTION are ints
im.tag_v2[X_RESOLUTION] = 71
im.tag_v2[Y_RESOLUTION] = 71
im._setup()
self.assertEqual(im.info["dpi"], (71.0, 71.0))
def test_load_dpi_rounding(self):
for resolutionUnit, dpi in ((None, (72, 73)), (2, (72, 73)), (3, (183, 185))):
im = Image.open(
"Tests/images/hopper_roundDown_" + str(resolutionUnit) + ".tif"
)
self.assertEqual(im.tag_v2.get(RESOLUTION_UNIT), resolutionUnit)
self.assertEqual(im.info["dpi"], (dpi[0], dpi[0]))
im = Image.open(
"Tests/images/hopper_roundUp_" + str(resolutionUnit) + ".tif"
)
self.assertEqual(im.tag_v2.get(RESOLUTION_UNIT), resolutionUnit)
self.assertEqual(im.info["dpi"], (dpi[1], dpi[1]))
def test_save_dpi_rounding(self):
outfile = self.tempfile("temp.tif")
im = Image.open("Tests/images/hopper.tif")
for dpi in (72.2, 72.8):
im.save(outfile, dpi=(dpi, dpi))
reloaded = Image.open(outfile)
reloaded.load()
self.assertEqual((round(dpi), round(dpi)), reloaded.info["dpi"])
def test_save_setting_missing_resolution(self):
b = BytesIO()
Image.open("Tests/images/10ct_32bit_128.tiff").save(
b, format="tiff", resolution=123.45
)
im = Image.open(b)
self.assertEqual(float(im.tag_v2[X_RESOLUTION]), 123.45)
self.assertEqual(float(im.tag_v2[Y_RESOLUTION]), 123.45)
def test_invalid_file(self):
invalid_file = "Tests/images/flower.jpg"
self.assertRaises(SyntaxError, TiffImagePlugin.TiffImageFile, invalid_file)
TiffImagePlugin.PREFIXES.append(b"\xff\xd8\xff\xe0")
self.assertRaises(SyntaxError, TiffImagePlugin.TiffImageFile, invalid_file)
TiffImagePlugin.PREFIXES.pop()
def test_bad_exif(self):
i = Image.open("Tests/images/hopper_bad_exif.jpg")
# Should not raise struct.error.
self.assert_warning(UserWarning, i._getexif)
def test_save_rgba(self):
im = hopper("RGBA")
outfile = self.tempfile("temp.tif")
im.save(outfile)
def test_save_unsupported_mode(self):
im = hopper("HSV")
outfile = self.tempfile("temp.tif")
self.assertRaises(IOError, im.save, outfile)
def test_little_endian(self):
im = Image.open("Tests/images/16bit.cropped.tif")
self.assertEqual(im.getpixel((0, 0)), 480)
self.assertEqual(im.mode, "I;16")
b = im.tobytes()
# Bytes are in image native order (little endian)
if py3:
self.assertEqual(b[0], ord(b"\xe0"))
self.assertEqual(b[1], ord(b"\x01"))
else:
self.assertEqual(b[0], b"\xe0")
self.assertEqual(b[1], b"\x01")
def test_big_endian(self):
im = Image.open("Tests/images/16bit.MM.cropped.tif")
self.assertEqual(im.getpixel((0, 0)), 480)
self.assertEqual(im.mode, "I;16B")
b = im.tobytes()
# Bytes are in image native order (big endian)
if py3:
self.assertEqual(b[0], ord(b"\x01"))
self.assertEqual(b[1], ord(b"\xe0"))
else:
self.assertEqual(b[0], b"\x01")
self.assertEqual(b[1], b"\xe0")
def test_16bit_s(self):
im = Image.open("Tests/images/16bit.s.tif")
im.load()
self.assertEqual(im.mode, "I")
self.assertEqual(im.getpixel((0, 0)), 32767)
self.assertEqual(im.getpixel((0, 1)), 0)
def test_12bit_rawmode(self):
""" Are we generating the same interpretation
of the image as Imagemagick is? """
im = Image.open("Tests/images/12bit.cropped.tif")
# to make the target --
# convert 12bit.cropped.tif -depth 16 tmp.tif
# convert tmp.tif -evaluate RightShift 4 12in16bit2.tif
# imagemagick will auto scale so that a 12bit FFF is 16bit FFF0,
# so we need to unshift so that the integer values are the same.
self.assert_image_equal_tofile(im, "Tests/images/12in16bit.tif")
def test_32bit_float(self):
# Issue 614, specific 32-bit float format
path = "Tests/images/10ct_32bit_128.tiff"
im = Image.open(path)
im.load()
self.assertEqual(im.getpixel((0, 0)), -0.4526388943195343)
self.assertEqual(im.getextrema(), (-3.140936851501465, 3.140684127807617))
def test_unknown_pixel_mode(self):
self.assertRaises(
IOError, Image.open, "Tests/images/hopper_unknown_pixel_mode.tif"
)
def test_n_frames(self):
for path, n_frames in [
["Tests/images/multipage-lastframe.tif", 1],
["Tests/images/multipage.tiff", 3],
]:
im = Image.open(path)
self.assertEqual(im.n_frames, n_frames)
self.assertEqual(im.is_animated, n_frames != 1)
def test_eoferror(self):
im = Image.open("Tests/images/multipage-lastframe.tif")
n_frames = im.n_frames
# Test seeking past the last frame
self.assertRaises(EOFError, im.seek, n_frames)
self.assertLess(im.tell(), n_frames)
# Test that seeking to the last frame does not raise an error
im.seek(n_frames - 1)
def test_multipage(self):
# issue #862
im = Image.open("Tests/images/multipage.tiff")
# file is a multipage tiff: 10x10 green, 10x10 red, 20x20 blue
im.seek(0)
self.assertEqual(im.size, (10, 10))
self.assertEqual(im.convert("RGB").getpixel((0, 0)), (0, 128, 0))
im.seek(1)
im.load()
self.assertEqual(im.size, (10, 10))
self.assertEqual(im.convert("RGB").getpixel((0, 0)), (255, 0, 0))
im.seek(0)
im.load()
self.assertEqual(im.size, (10, 10))
self.assertEqual(im.convert("RGB").getpixel((0, 0)), (0, 128, 0))
im.seek(2)
im.load()
self.assertEqual(im.size, (20, 20))
self.assertEqual(im.convert("RGB").getpixel((0, 0)), (0, 0, 255))
def test_multipage_last_frame(self):
im = Image.open("Tests/images/multipage-lastframe.tif")
im.load()
self.assertEqual(im.size, (20, 20))
self.assertEqual(im.convert("RGB").getpixel((0, 0)), (0, 0, 255))
def test___str__(self):
filename = "Tests/images/pil136.tiff"
im = Image.open(filename)
# Act
ret = str(im.ifd)
# Assert
self.assertIsInstance(ret, str)
def test_dict(self):
# Arrange
filename = "Tests/images/pil136.tiff"
im = Image.open(filename)
# v2 interface
v2_tags = {
256: 55,
257: 43,
258: (8, 8, 8, 8),
259: 1,
262: 2,
296: 2,
273: (8,),
338: (1,),
277: 4,
279: (9460,),
282: 72.0,
283: 72.0,
284: 1,
}
self.assertEqual(dict(im.tag_v2), v2_tags)
# legacy interface
legacy_tags = {
256: (55,),
257: (43,),
258: (8, 8, 8, 8),
259: (1,),
262: (2,),
296: (2,),
273: (8,),
338: (1,),
277: (4,),
279: (9460,),
282: ((720000, 10000),),
283: ((720000, 10000),),
284: (1,),
}
self.assertEqual(dict(im.tag), legacy_tags)
def test__delitem__(self):
filename = "Tests/images/pil136.tiff"
im = Image.open(filename)
len_before = len(dict(im.ifd))
del im.ifd[256]
len_after = len(dict(im.ifd))
self.assertEqual(len_before, len_after + 1)
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_load_string(self):
ifd = TiffImagePlugin.ImageFileDirectory_v2()
data = b"abc\0"
ret = ifd.load_string(data, False)
self.assertEqual(ret, "abc")
def test_load_float(self):
ifd = TiffImagePlugin.ImageFileDirectory_v2()
data = b"abcdabcd"
ret = ifd.load_float(data, False)
self.assertEqual(ret, (1.6777999408082104e22, 1.6777999408082104e22))
def test_load_double(self):
ifd = TiffImagePlugin.ImageFileDirectory_v2()
data = b"abcdefghabcdefgh"
ret = ifd.load_double(data, False)
self.assertEqual(ret, (8.540883223036124e194, 8.540883223036124e194))
def test_seek(self):
filename = "Tests/images/pil136.tiff"
im = Image.open(filename)
im.seek(0)
self.assertEqual(im.tell(), 0)
def test_seek_eof(self):
filename = "Tests/images/pil136.tiff"
im = Image.open(filename)
self.assertEqual(im.tell(), 0)
self.assertRaises(EOFError, im.seek, -1)
self.assertRaises(EOFError, im.seek, 1)
def test__limit_rational_int(self):
from PIL.TiffImagePlugin import _limit_rational
value = 34
ret = _limit_rational(value, 65536)
self.assertEqual(ret, (34, 1))
def test__limit_rational_float(self):
from PIL.TiffImagePlugin import _limit_rational
value = 22.3
ret = _limit_rational(value, 65536)
self.assertEqual(ret, (223, 10))
def test_4bit(self):
test_file = "Tests/images/hopper_gray_4bpp.tif"
original = hopper("L")
im = Image.open(test_file)
self.assertEqual(im.size, (128, 128))
self.assertEqual(im.mode, "L")
self.assert_image_similar(im, original, 7.3)
def test_gray_semibyte_per_pixel(self):
test_files = (
(
24.8, # epsilon
( # group
"Tests/images/tiff_gray_2_4_bpp/hopper2.tif",
"Tests/images/tiff_gray_2_4_bpp/hopper2I.tif",
"Tests/images/tiff_gray_2_4_bpp/hopper2R.tif",
"Tests/images/tiff_gray_2_4_bpp/hopper2IR.tif",
),
),
(
7.3, # epsilon
( # group
"Tests/images/tiff_gray_2_4_bpp/hopper4.tif",
"Tests/images/tiff_gray_2_4_bpp/hopper4I.tif",
"Tests/images/tiff_gray_2_4_bpp/hopper4R.tif",
"Tests/images/tiff_gray_2_4_bpp/hopper4IR.tif",
),
),
)
original = hopper("L")
for epsilon, group in test_files:
im = Image.open(group[0])
self.assertEqual(im.size, (128, 128))
self.assertEqual(im.mode, "L")
self.assert_image_similar(im, original, epsilon)
for file in group[1:]:
im2 = Image.open(file)
self.assertEqual(im2.size, (128, 128))
self.assertEqual(im2.mode, "L")
self.assert_image_equal(im, im2)
def test_with_underscores(self):
kwargs = {"resolution_unit": "inch", "x_resolution": 72, "y_resolution": 36}
filename = self.tempfile("temp.tif")
hopper("RGB").save(filename, **kwargs)
im = Image.open(filename)
# legacy interface
self.assertEqual(im.tag[X_RESOLUTION][0][0], 72)
self.assertEqual(im.tag[Y_RESOLUTION][0][0], 36)
# v2 interface
self.assertEqual(im.tag_v2[X_RESOLUTION], 72)
self.assertEqual(im.tag_v2[Y_RESOLUTION], 36)
def test_roundtrip_tiff_uint16(self):
# Test an image of all '0' values
pixel_value = 0x1234
infile = "Tests/images/uint16_1_4660.tif"
im = Image.open(infile)
self.assertEqual(im.getpixel((0, 0)), pixel_value)
tmpfile = self.tempfile("temp.tif")
im.save(tmpfile)
reloaded = Image.open(tmpfile)
self.assert_image_equal(im, reloaded)
def test_strip_raw(self):
infile = "Tests/images/tiff_strip_raw.tif"
im = Image.open(infile)
self.assert_image_equal_tofile(im, "Tests/images/tiff_adobe_deflate.png")
def test_strip_planar_raw(self):
# gdal_translate -of GTiff -co INTERLEAVE=BAND \
# tiff_strip_raw.tif tiff_strip_planar_raw.tiff
infile = "Tests/images/tiff_strip_planar_raw.tif"
im = Image.open(infile)
self.assert_image_equal_tofile(im, "Tests/images/tiff_adobe_deflate.png")
def test_strip_planar_raw_with_overviews(self):
# gdaladdo tiff_strip_planar_raw2.tif 2 4 8 16
infile = "Tests/images/tiff_strip_planar_raw_with_overviews.tif"
im = Image.open(infile)
self.assert_image_equal_tofile(im, "Tests/images/tiff_adobe_deflate.png")
def test_tiled_planar_raw(self):
# gdal_translate -of GTiff -co TILED=YES -co BLOCKXSIZE=32 \
# -co BLOCKYSIZE=32 -co INTERLEAVE=BAND \
# tiff_tiled_raw.tif tiff_tiled_planar_raw.tiff
infile = "Tests/images/tiff_tiled_planar_raw.tif"
im = Image.open(infile)
self.assert_image_equal_tofile(im, "Tests/images/tiff_adobe_deflate.png")
def test_palette(self):
for mode in ["P", "PA"]:
outfile = self.tempfile("temp.tif")
im = hopper(mode)
im.save(outfile)
reloaded = Image.open(outfile)
self.assert_image_equal(im.convert("RGB"), reloaded.convert("RGB"))
def test_tiff_save_all(self):
import io
import os
mp = io.BytesIO()
with Image.open("Tests/images/multipage.tiff") as im:
im.save(mp, format="tiff", save_all=True)
mp.seek(0, os.SEEK_SET)
with Image.open(mp) as im:
self.assertEqual(im.n_frames, 3)
# Test appending images
mp = io.BytesIO()
im = Image.new("RGB", (100, 100), "#f00")
ims = [Image.new("RGB", (100, 100), color) for color in ["#0f0", "#00f"]]
im.copy().save(mp, format="TIFF", save_all=True, append_images=ims)
mp.seek(0, os.SEEK_SET)
reread = Image.open(mp)
self.assertEqual(reread.n_frames, 3)
# Test appending using a generator
def imGenerator(ims):
for im in ims:
yield im
mp = io.BytesIO()
im.save(mp, format="TIFF", save_all=True, append_images=imGenerator(ims))
mp.seek(0, os.SEEK_SET)
reread = Image.open(mp)
self.assertEqual(reread.n_frames, 3)
def test_saving_icc_profile(self):
# Tests saving TIFF with icc_profile set.
# At the time of writing this will only work for non-compressed tiffs
# as libtiff does not support embedded ICC profiles,
# ImageFile._save(..) however does.
im = Image.new("RGB", (1, 1))
im.info["icc_profile"] = "Dummy value"
# Try save-load round trip to make sure both handle icc_profile.
tmpfile = self.tempfile("temp.tif")
im.save(tmpfile, "TIFF", compression="raw")
reloaded = Image.open(tmpfile)
self.assertEqual(b"Dummy value", reloaded.info["icc_profile"])
def test_close_on_load_exclusive(self):
# similar to test_fd_leak, but runs on unixlike os
tmpfile = self.tempfile("temp.tif")
with Image.open("Tests/images/uint16_1_4660.tif") as im:
im.save(tmpfile)
im = Image.open(tmpfile)
fp = im.fp
self.assertFalse(fp.closed)
im.load()
self.assertTrue(fp.closed)
def test_close_on_load_nonexclusive(self):
tmpfile = self.tempfile("temp.tif")
with Image.open("Tests/images/uint16_1_4660.tif") as im:
im.save(tmpfile)
with open(tmpfile, "rb") as f:
im = Image.open(f)
fp = im.fp
self.assertFalse(fp.closed)
im.load()
self.assertFalse(fp.closed)
@unittest.skipUnless(features.check("libtiff"), "libtiff not installed")
def test_sampleformat_not_corrupted(self):
# Assert that a TIFF image with SampleFormat=UINT tag is not corrupted
# when saving to a new file.
# Pillow 6.0 fails with "OSError: cannot identify image file".
import base64
tiff = BytesIO(
base64.b64decode(
b"SUkqAAgAAAAPAP4ABAABAAAAAAAAAAABBAABAAAAAQAAAAEBBAABAAAAAQAA"
b"AAIBAwADAAAAwgAAAAMBAwABAAAACAAAAAYBAwABAAAAAgAAABEBBAABAAAA"
b"4AAAABUBAwABAAAAAwAAABYBBAABAAAAAQAAABcBBAABAAAACwAAABoBBQAB"
b"AAAAyAAAABsBBQABAAAA0AAAABwBAwABAAAAAQAAACgBAwABAAAAAQAAAFMB"
b"AwADAAAA2AAAAAAAAAAIAAgACAABAAAAAQAAAAEAAAABAAAAAQABAAEAAAB4"
b"nGNgYAAAAAMAAQ=="
)
)
out = BytesIO()
with Image.open(tiff) as im:
im.save(out, format="tiff")
out.seek(0)
with Image.open(out) as im:
im.load()
@unittest.skipUnless(sys.platform.startswith("win32"), "Windows only")
class TestFileTiffW32(PillowTestCase):
def test_fd_leak(self):
tmpfile = self.tempfile("temp.tif")
import os
# this is an mmaped file.
with Image.open("Tests/images/uint16_1_4660.tif") as im:
im.save(tmpfile)
im = Image.open(tmpfile)
fp = im.fp
self.assertFalse(fp.closed)
self.assertRaises(WindowsError, os.remove, tmpfile)
im.load()
self.assertTrue(fp.closed)
# this closes the mmap
im.close()
# this should not fail, as load should have closed the file pointer,
# and close should have closed the mmap
os.remove(tmpfile)
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