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Pillow/Tests/test_file_tiff.py
Andrew Murray 46f439604c Added tests
2015-06-08 01:02:43 +10:00

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from __future__ import print_function
from helper import unittest, PillowTestCase, hopper, py3
from PIL import Image, TiffImagePlugin
import struct
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_xyres_tiff(self):
from PIL.TiffImagePlugin import X_RESOLUTION, Y_RESOLUTION
filename = "Tests/images/pil168.tif"
im = Image.open(filename)
assert isinstance(im.tag.tags[X_RESOLUTION][0], tuple)
assert isinstance(im.tag.tags[Y_RESOLUTION][0], tuple)
# Try to read a file where X,Y_RESOLUTION are ints
im.tag.tags[X_RESOLUTION] = (72,)
im.tag.tags[Y_RESOLUTION] = (72,)
im._setup()
self.assertEqual(im.info['dpi'], (72., 72.))
def test_bad_exif(self):
try:
Image.open('Tests/images/hopper_bad_exif.jpg')._getexif()
except struct.error:
self.fail("Bad EXIF data should not pass incorrect values to _binary unpack")
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? """
# Image.DEBUG = True
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')
if Image.DEBUG:
print(im.getpixel((0, 0)))
print(im.getpixel((0, 1)))
print(im.getpixel((0, 2)))
print(im2.getpixel((0, 0)))
print(im2.getpixel((0, 1)))
print(im2.getpixel((0, 2)))
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)
im = Image.open('Tests/images/multipage.tiff')
self.assertEqual(im.n_frames, 3)
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):
# Arrange
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)
# Act
ret = im.ifd.as_dict()
# Assert
self.assertIsInstance(ret, dict)
self.assertEqual(
ret, {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):
# Arrange
filename = "Tests/images/pil136.tiff"
im = Image.open(filename)
len_before = len(im.ifd.as_dict())
# Act
del im.ifd[256]
# Assert
len_after = len(im.ifd.as_dict())
self.assertEqual(len_before, len_after + 1)
def test_load_byte(self):
# Arrange
ifd = TiffImagePlugin.ImageFileDirectory()
data = b"abc"
# Act
ret = ifd.load_byte(data)
# Assert
self.assertEqual(ret, b"abc")
def test_load_string(self):
# Arrange
ifd = TiffImagePlugin.ImageFileDirectory()
data = b"abc\0"
# Act
ret = ifd.load_string(data)
# Assert
self.assertEqual(ret, "abc")
def test_load_float(self):
# Arrange
ifd = TiffImagePlugin.ImageFileDirectory()
data = b"abcdabcd"
# Act
ret = ifd.load_float(data)
# Assert
self.assertEqual(ret, (1.6777999408082104e+22, 1.6777999408082104e+22))
def test_load_double(self):
# Arrange
ifd = TiffImagePlugin.ImageFileDirectory()
data = b"abcdefghabcdefgh"
# Act
ret = ifd.load_double(data)
# Assert
self.assertEqual(ret, (8.540883223036124e+194, 8.540883223036124e+194))
def test_seek(self):
# Arrange
filename = "Tests/images/pil136.tiff"
im = Image.open(filename)
# Act
im.seek(-1)
# Assert
self.assertEqual(im.tell(), 0)
def test_seek_eof(self):
# Arrange
filename = "Tests/images/pil136.tiff"
im = Image.open(filename)
self.assertEqual(im.tell(), 0)
# Act / Assert
self.assertRaises(EOFError, lambda: im.seek(1))
def test__cvt_res_int(self):
# Arrange
from PIL.TiffImagePlugin import _cvt_res
value = 34
# Act
ret = _cvt_res(value)
# Assert
self.assertEqual(ret, (34, 1))
def test__cvt_res_float(self):
# Arrange
from PIL.TiffImagePlugin import _cvt_res
value = 22.3
# Act
ret = _cvt_res(value)
# Assert
self.assertEqual(ret, (1461452, 65536))
def test__cvt_res_sequence(self):
# Arrange
from PIL.TiffImagePlugin import _cvt_res
value = [0, 1]
# Act
ret = _cvt_res(value)
# Assert
self.assertEqual(ret, [0, 1])
def test_4bit(self):
# Arrange
test_file = "Tests/images/hopper_gray_4bpp.tif"
original = hopper("L")
# Act
im = Image.open(test_file)
# Assert
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.
# Arrange
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)
# Act / Assert
# Should not divide by zero
im.save(outfile)
def test_with_underscores(self):
# Arrange: use underscores
kwargs = {'resolution_unit': 'inch',
'x_resolution': 72,
'y_resolution': 36}
filename = self.tempfile("temp.tif")
# Act
hopper("RGB").save(filename, **kwargs)
# Assert
from PIL.TiffImagePlugin import X_RESOLUTION, Y_RESOLUTION
im = Image.open(filename)
self.assertEqual(im.tag.tags[X_RESOLUTION][0][0], 72)
self.assertEqual(im.tag.tags[Y_RESOLUTION][0][0], 36)
def test_deprecation_warning_with_spaces(self):
# Arrange: use spaces
kwargs = {'resolution unit': 'inch',
'x resolution': 36,
'y resolution': 72}
filename = self.tempfile("temp.tif")
# Act
self.assert_warning(DeprecationWarning,
lambda: hopper("RGB").save(filename, **kwargs))
# Assert
from PIL.TiffImagePlugin import X_RESOLUTION, Y_RESOLUTION
im = Image.open(filename)
self.assertEqual(im.tag.tags[X_RESOLUTION][0][0], 36)
self.assertEqual(im.tag.tags[Y_RESOLUTION][0][0], 72)
if __name__ == '__main__':
unittest.main()
# End of file
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