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Pillow/Tests/test_file_tiff.py
Hugo c0b3fe77d7 Merge pull request #1621 from radarhere/health 
Flake8 fixes
2015-12-31 15:18:31 +02:00

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from __future__ import print_function
import logging
import struct
from helper import unittest, PillowTestCase, hopper, py3
from PIL import Image, TiffImagePlugin
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)
im = Image.open(filename)
hopper("L").save(filename)
im = Image.open(filename)
hopper("P").save(filename)
im = Image.open(filename)
hopper("RGB").save(filename)
im = Image.open(filename)
hopper("I").save(filename)
im = Image.open(filename)
def test_mac_tiff(self):
# Read RGBa images from Mac OS X [@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()
def test_gimp_tiff(self):
# Read TIFF JPEG images from GIMP [@PIL168]
codecs = dir(Image.core)
if "jpeg_decoder" not in codecs:
self.skipTest("jpeg support not available")
filename = "Tests/images/pil168.tif"
im = Image.open(filename)
self.assertEqual(im.mode, "RGB")
self.assertEqual(im.size, (256, 256))
self.assertEqual(
im.tile, [
('jpeg', (0, 0, 256, 64), 8, ('RGB', '')),
('jpeg', (0, 64, 256, 128), 1215, ('RGB', '')),
('jpeg', (0, 128, 256, 192), 2550, ('RGB', '')),
('jpeg', (0, 192, 256, 256), 3890, ('RGB', '')),
])
im.load()
def test_sampleformat(self):
# https://github.com/python-pillow/Pillow/issues/1466
im = Image.open("Tests/images/copyleft.tiff")
self.assertEqual(im.mode, 'RGB')
def test_xyres_tiff(self):
from PIL.TiffImagePlugin import X_RESOLUTION, Y_RESOLUTION
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.assert_(isinstance(im.tag_v2[X_RESOLUTION], TiffImagePlugin.IFDRational))
self.assert_(isinstance(im.tag_v2[Y_RESOLUTION], TiffImagePlugin.IFDRational))
self.assertEqual(im.info['dpi'], (72., 72.))
def test_int_resolution(self):
from PIL.TiffImagePlugin import X_RESOLUTION, Y_RESOLUTION
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., 71.))
def test_invalid_file(self):
invalid_file = "Tests/images/flower.jpg"
self.assertRaises(SyntaxError,
lambda: TiffImagePlugin.TiffImageFile(invalid_file))
def test_bad_exif(self):
i = Image.open('Tests/images/hopper_bad_exif.jpg')
try:
self.assert_warning(UserWarning, i._getexif)
except struct.error:
self.fail(
"Bad EXIF data passed incorrect values to _binary unpack")
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, lambda: 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_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.
im2 = Image.open('Tests/images/12in16bit.tif')
logger.debug("%s", [img.getpixel((0, idx))
for img in [im, im2] for idx in range(3)])
self.assert_image_equal(im, im2)
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_n_frames(self):
im = Image.open('Tests/images/multipage-lastframe.tif')
self.assertEqual(im.n_frames, 1)
self.assertFalse(im.is_animated)
im = Image.open('Tests/images/multipage.tiff')
self.assertEqual(im.n_frames, 3)
self.assertTrue(im.is_animated)
def test_eoferror(self):
im = Image.open('Tests/images/multipage-lastframe.tif')
n_frames = im.n_frames
while True:
n_frames -= 1
try:
im.seek(n_frames)
break
except EOFError:
self.assertTrue(im.tell() < n_frames)
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(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_as_dict(self):
# Arrange
filename = "Tests/images/pil136.tiff"
im = Image.open(filename)
# v2 interface
self.assertEqual(
im.tag_v2.as_dict(),
{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})
# legacy interface
self.assertEqual(
im.tag.as_dict(),
{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,)})
def test__delitem__(self):
filename = "Tests/images/pil136.tiff"
im = Image.open(filename)
len_before = len(im.ifd.as_dict())
del im.ifd[256]
len_after = len(im.ifd.as_dict())
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" if legacy_api else (97, 98, 99))
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, (1.6777999408082104e+22, 1.6777999408082104e+22))
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_seek(self):
filename = "Tests/images/pil136.tiff"
im = Image.open(filename)
im.seek(-1)
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, lambda: 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_page_number_x_0(self):
# Issue 973
# Test TIFF with tag 297 (Page Number) having value of 0 0.
# The first number is the current page number.
# The second is the total number of pages, zero means not available.
outfile = self.tempfile("temp.tif")
# Created by printing a page in Chrome to PDF, then:
# /usr/bin/gs -q -sDEVICE=tiffg3 -sOutputFile=total-pages-zero.tif
# -dNOPAUSE /tmp/test.pdf -c quit
infile = "Tests/images/total-pages-zero.tif"
im = Image.open(infile)
# Should not divide by zero
im.save(outfile)
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)
from PIL.TiffImagePlugin import X_RESOLUTION, Y_RESOLUTION
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_deprecation_warning_with_spaces(self):
kwargs = {'resolution unit': 'inch',
'x resolution': 36,
'y resolution': 72}
filename = self.tempfile("temp.tif")
self.assert_warning(DeprecationWarning,
lambda: hopper("RGB").save(filename, **kwargs))
from PIL.TiffImagePlugin import X_RESOLUTION, Y_RESOLUTION
im = Image.open(filename)
# legacy interface
self.assertEqual(im.tag[X_RESOLUTION][0][0], 36)
self.assertEqual(im.tag[Y_RESOLUTION][0][0], 72)
# v2 interface
self.assertEqual(im.tag_v2[X_RESOLUTION], 36)
self.assertEqual(im.tag_v2[Y_RESOLUTION], 72)
if __name__ == '__main__':
unittest.main()
# End of file
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