Pillow/Tests/test_file_tiff.py
2020-10-14 23:37:54 +11:00

630 lines
21 KiB
Python

import os
from io import BytesIO
import pytest
from PIL import Image, TiffImagePlugin
from PIL.TiffImagePlugin import RESOLUTION_UNIT, X_RESOLUTION, Y_RESOLUTION
from .helper import (
assert_image_equal,
assert_image_equal_tofile,
assert_image_similar,
assert_image_similar_tofile,
hopper,
is_pypy,
is_win32,
)
class TestFileTiff:
def test_sanity(self, tmp_path):
filename = str(tmp_path / "temp.tif")
hopper("RGB").save(filename)
with Image.open(filename) as im:
im.load()
assert im.mode == "RGB"
assert im.size == (128, 128)
assert im.format == "TIFF"
hopper("1").save(filename)
with Image.open(filename):
pass
hopper("L").save(filename)
with Image.open(filename):
pass
hopper("P").save(filename)
with Image.open(filename):
pass
hopper("RGB").save(filename)
with Image.open(filename):
pass
hopper("I").save(filename)
with Image.open(filename):
pass
@pytest.mark.skipif(is_pypy(), reason="Requires CPython")
def test_unclosed_file(self):
def open():
im = Image.open("Tests/images/multipage.tiff")
im.load()
pytest.warns(ResourceWarning, open)
def test_closed_file(self):
def open():
im = Image.open("Tests/images/multipage.tiff")
im.load()
im.close()
pytest.warns(None, open)
def test_context_manager(self):
def open():
with Image.open("Tests/images/multipage.tiff") as im:
im.load()
pytest.warns(None, open)
def test_mac_tiff(self):
# Read RGBa images from macOS [@PIL136]
filename = "Tests/images/pil136.tiff"
with Image.open(filename) as im:
assert im.mode == "RGBA"
assert im.size == (55, 43)
assert im.tile == [("raw", (0, 0, 55, 43), 8, ("RGBa", 0, 1))]
im.load()
assert_image_similar_tofile(im, "Tests/images/pil136.png", 1)
def test_wrong_bits_per_sample(self):
with Image.open("Tests/images/tiff_wrong_bits_per_sample.tiff") as im:
assert im.mode == "RGBA"
assert im.size == (52, 53)
assert im.tile == [("raw", (0, 0, 52, 53), 160, ("RGBA", 0, 1))]
im.load()
def test_set_legacy_api(self):
ifd = TiffImagePlugin.ImageFileDirectory_v2()
with pytest.raises(Exception) as e:
ifd.legacy_api = None
assert str(e.value) == "Not allowing setting of legacy api"
def test_xyres_tiff(self):
filename = "Tests/images/pil168.tif"
with Image.open(filename) as im:
# legacy api
assert isinstance(im.tag[X_RESOLUTION][0], tuple)
assert isinstance(im.tag[Y_RESOLUTION][0], tuple)
# v2 api
assert isinstance(im.tag_v2[X_RESOLUTION], TiffImagePlugin.IFDRational)
assert isinstance(im.tag_v2[Y_RESOLUTION], TiffImagePlugin.IFDRational)
assert im.info["dpi"] == (72.0, 72.0)
def test_xyres_fallback_tiff(self):
filename = "Tests/images/compression.tif"
with Image.open(filename) as im:
# v2 api
assert isinstance(im.tag_v2[X_RESOLUTION], TiffImagePlugin.IFDRational)
assert isinstance(im.tag_v2[Y_RESOLUTION], TiffImagePlugin.IFDRational)
with pytest.raises(KeyError):
im.tag_v2[RESOLUTION_UNIT]
# Legacy.
assert im.info["resolution"] == (100.0, 100.0)
# Fallback "inch".
assert im.info["dpi"] == (100.0, 100.0)
def test_int_resolution(self):
filename = "Tests/images/pil168.tif"
with Image.open(filename) as im:
# 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()
assert 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))):
with Image.open(
"Tests/images/hopper_roundDown_" + str(resolutionUnit) + ".tif"
) as im:
assert im.tag_v2.get(RESOLUTION_UNIT) == resolutionUnit
assert im.info["dpi"] == (dpi[0], dpi[0])
with Image.open(
"Tests/images/hopper_roundUp_" + str(resolutionUnit) + ".tif"
) as im:
assert im.tag_v2.get(RESOLUTION_UNIT) == resolutionUnit
assert im.info["dpi"] == (dpi[1], dpi[1])
def test_save_dpi_rounding(self, tmp_path):
outfile = str(tmp_path / "temp.tif")
with Image.open("Tests/images/hopper.tif") as im:
for dpi in (72.2, 72.8):
im.save(outfile, dpi=(dpi, dpi))
with Image.open(outfile) as reloaded:
reloaded.load()
assert (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
)
with Image.open(b) as im:
assert float(im.tag_v2[X_RESOLUTION]) == 123.45
assert float(im.tag_v2[Y_RESOLUTION]) == 123.45
def test_invalid_file(self):
invalid_file = "Tests/images/flower.jpg"
with pytest.raises(SyntaxError):
TiffImagePlugin.TiffImageFile(invalid_file)
TiffImagePlugin.PREFIXES.append(b"\xff\xd8\xff\xe0")
with pytest.raises(SyntaxError):
TiffImagePlugin.TiffImageFile(invalid_file)
TiffImagePlugin.PREFIXES.pop()
def test_bad_exif(self):
with Image.open("Tests/images/hopper_bad_exif.jpg") as i:
# Should not raise struct.error.
pytest.warns(UserWarning, i._getexif)
def test_save_rgba(self, tmp_path):
im = hopper("RGBA")
outfile = str(tmp_path / "temp.tif")
im.save(outfile)
def test_save_unsupported_mode(self, tmp_path):
im = hopper("HSV")
outfile = str(tmp_path / "temp.tif")
with pytest.raises(OSError):
im.save(outfile)
def test_little_endian(self):
with Image.open("Tests/images/16bit.cropped.tif") as im:
assert im.getpixel((0, 0)) == 480
assert im.mode == "I;16"
b = im.tobytes()
# Bytes are in image native order (little endian)
assert b[0] == ord(b"\xe0")
assert b[1] == ord(b"\x01")
def test_big_endian(self):
with Image.open("Tests/images/16bit.MM.cropped.tif") as im:
assert im.getpixel((0, 0)) == 480
assert im.mode == "I;16B"
b = im.tobytes()
# Bytes are in image native order (big endian)
assert b[0] == ord(b"\x01")
assert b[1] == ord(b"\xe0")
def test_16bit_s(self):
with Image.open("Tests/images/16bit.s.tif") as im:
im.load()
assert im.mode == "I"
assert im.getpixel((0, 0)) == 32767
assert im.getpixel((0, 1)) == 0
def test_12bit_rawmode(self):
"""Are we generating the same interpretation
of the image as Imagemagick is?"""
with Image.open("Tests/images/12bit.cropped.tif") as im:
# 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.
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"
with Image.open(path) as im:
im.load()
assert im.getpixel((0, 0)) == -0.4526388943195343
assert im.getextrema() == (-3.140936851501465, 3.140684127807617)
def test_unknown_pixel_mode(self):
with pytest.raises(OSError):
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],
]:
with Image.open(path) as im:
assert im.n_frames == n_frames
assert im.is_animated == (n_frames != 1)
def test_eoferror(self):
with Image.open("Tests/images/multipage-lastframe.tif") as im:
n_frames = im.n_frames
# Test seeking past the last frame
with pytest.raises(EOFError):
im.seek(n_frames)
assert 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
with Image.open("Tests/images/multipage.tiff") as im:
# file is a multipage tiff: 10x10 green, 10x10 red, 20x20 blue
im.seek(0)
assert im.size == (10, 10)
assert im.convert("RGB").getpixel((0, 0)) == (0, 128, 0)
im.seek(1)
im.load()
assert im.size == (10, 10)
assert im.convert("RGB").getpixel((0, 0)) == (255, 0, 0)
im.seek(0)
im.load()
assert im.size == (10, 10)
assert im.convert("RGB").getpixel((0, 0)) == (0, 128, 0)
im.seek(2)
im.load()
assert im.size == (20, 20)
assert im.convert("RGB").getpixel((0, 0)) == (0, 0, 255)
def test_multipage_last_frame(self):
with Image.open("Tests/images/multipage-lastframe.tif") as im:
im.load()
assert im.size == (20, 20)
assert im.convert("RGB").getpixel((0, 0)) == (0, 0, 255)
def test___str__(self):
filename = "Tests/images/pil136.tiff"
with Image.open(filename) as im:
# Act
ret = str(im.ifd)
# Assert
assert isinstance(ret, str)
def test_dict(self):
# Arrange
filename = "Tests/images/pil136.tiff"
with Image.open(filename) as im:
# 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,
}
assert 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,),
}
assert dict(im.tag) == legacy_tags
def test__delitem__(self):
filename = "Tests/images/pil136.tiff"
with Image.open(filename) as im:
len_before = len(dict(im.ifd))
del im.ifd[256]
len_after = len(dict(im.ifd))
assert 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)
assert ret == b"abc"
def test_load_string(self):
ifd = TiffImagePlugin.ImageFileDirectory_v2()
data = b"abc\0"
ret = ifd.load_string(data, False)
assert ret == "abc"
def test_load_float(self):
ifd = TiffImagePlugin.ImageFileDirectory_v2()
data = b"abcdabcd"
ret = ifd.load_float(data, False)
assert ret == (1.6777999408082104e22, 1.6777999408082104e22)
def test_load_double(self):
ifd = TiffImagePlugin.ImageFileDirectory_v2()
data = b"abcdefghabcdefgh"
ret = ifd.load_double(data, False)
assert ret == (8.540883223036124e194, 8.540883223036124e194)
def test_ifd_tag_type(self):
with Image.open("Tests/images/ifd_tag_type.tiff") as im:
assert 0x8825 in im.tag_v2
def test_seek(self):
filename = "Tests/images/pil136.tiff"
with Image.open(filename) as im:
im.seek(0)
assert im.tell() == 0
def test_seek_eof(self):
filename = "Tests/images/pil136.tiff"
with Image.open(filename) as im:
assert im.tell() == 0
with pytest.raises(EOFError):
im.seek(-1)
with pytest.raises(EOFError):
im.seek(1)
def test__limit_rational_int(self):
from PIL.TiffImagePlugin import _limit_rational
value = 34
ret = _limit_rational(value, 65536)
assert ret == (34, 1)
def test__limit_rational_float(self):
from PIL.TiffImagePlugin import _limit_rational
value = 22.3
ret = _limit_rational(value, 65536)
assert ret == (223, 10)
def test_4bit(self):
test_file = "Tests/images/hopper_gray_4bpp.tif"
original = hopper("L")
with Image.open(test_file) as im:
assert im.size == (128, 128)
assert im.mode == "L"
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:
with Image.open(group[0]) as im:
assert im.size == (128, 128)
assert im.mode == "L"
assert_image_similar(im, original, epsilon)
for file in group[1:]:
with Image.open(file) as im2:
assert im2.size == (128, 128)
assert im2.mode == "L"
assert_image_equal(im, im2)
def test_with_underscores(self, tmp_path):
kwargs = {"resolution_unit": "inch", "x_resolution": 72, "y_resolution": 36}
filename = str(tmp_path / "temp.tif")
hopper("RGB").save(filename, **kwargs)
with Image.open(filename) as im:
# legacy interface
assert im.tag[X_RESOLUTION][0][0] == 72
assert im.tag[Y_RESOLUTION][0][0] == 36
# v2 interface
assert im.tag_v2[X_RESOLUTION] == 72
assert im.tag_v2[Y_RESOLUTION] == 36
def test_roundtrip_tiff_uint16(self, tmp_path):
# Test an image of all '0' values
pixel_value = 0x1234
infile = "Tests/images/uint16_1_4660.tif"
with Image.open(infile) as im:
assert im.getpixel((0, 0)) == pixel_value
tmpfile = str(tmp_path / "temp.tif")
im.save(tmpfile)
with Image.open(tmpfile) as reloaded:
assert_image_equal(im, reloaded)
def test_strip_raw(self):
infile = "Tests/images/tiff_strip_raw.tif"
with Image.open(infile) as im:
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"
with Image.open(infile) as im:
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"
with Image.open(infile) as im:
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"
with Image.open(infile) as im:
assert_image_equal_tofile(im, "Tests/images/tiff_adobe_deflate.png")
def test_palette(self, tmp_path):
def roundtrip(mode):
outfile = str(tmp_path / "temp.tif")
im = hopper(mode)
im.save(outfile)
with Image.open(outfile) as reloaded:
assert_image_equal(im.convert("RGB"), reloaded.convert("RGB"))
for mode in ["P", "PA"]:
roundtrip(mode)
def test_tiff_save_all(self):
mp = 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:
assert im.n_frames == 3
# Test appending images
mp = 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)
with Image.open(mp) as reread:
assert reread.n_frames == 3
# Test appending using a generator
def imGenerator(ims):
yield from ims
mp = BytesIO()
im.save(mp, format="TIFF", save_all=True, append_images=imGenerator(ims))
mp.seek(0, os.SEEK_SET)
with Image.open(mp) as reread:
assert reread.n_frames == 3
def test_saving_icc_profile(self, tmp_path):
# 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 = str(tmp_path / "temp.tif")
im.save(tmpfile, "TIFF", compression="raw")
with Image.open(tmpfile) as reloaded:
assert b"Dummy value" == reloaded.info["icc_profile"]
def test_close_on_load_exclusive(self, tmp_path):
# similar to test_fd_leak, but runs on unixlike os
tmpfile = str(tmp_path / "temp.tif")
with Image.open("Tests/images/uint16_1_4660.tif") as im:
im.save(tmpfile)
im = Image.open(tmpfile)
fp = im.fp
assert not fp.closed
im.load()
assert fp.closed
def test_close_on_load_nonexclusive(self, tmp_path):
tmpfile = str(tmp_path / "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
assert not fp.closed
im.load()
assert not fp.closed
# Ignore this UserWarning which triggers for four tags:
# "Possibly corrupt EXIF data. Expecting to read 50404352 bytes but..."
@pytest.mark.filterwarnings("ignore:Possibly corrupt EXIF data")
def test_string_dimension(self):
# Assert that an error is raised if one of the dimensions is a string
with pytest.raises(ValueError):
Image.open("Tests/images/string_dimension.tiff")
@pytest.mark.skipif(not is_win32(), reason="Windows only")
class TestFileTiffW32:
def test_fd_leak(self, tmp_path):
tmpfile = str(tmp_path / "temp.tif")
# 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
assert not fp.closed
with pytest.raises(OSError):
os.remove(tmpfile)
im.load()
assert 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)