Pillow/Tests/test_file_tiff.py

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from helper import unittest, PillowTestCase, hopper, py3
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from PIL import Image, TiffImagePlugin
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class TestFileTiff(PillowTestCase):
def test_sanity(self):
filename = self.tempfile("temp.tif")
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hopper("RGB").save(filename)
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im = Image.open(filename)
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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)
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hopper("P").save(filename)
im = Image.open(filename)
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hopper("RGB").save(filename)
im = Image.open(filename)
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hopper("I").save(filename)
im = Image.open(filename)
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def test_mac_tiff(self):
# Read RGBa images from Mac OS X [@PIL136]
filename = "Tests/images/pil136.tiff"
im = Image.open(filename)
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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)
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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)
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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_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))
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def test_multipage(self):
# issue #862
im = Image.open('Tests/images/multipage.tiff')
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# file is a multipage tiff: 10x10 green, 10x10 red, 20x20 blue
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im.seek(0)
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self.assertEqual(im.size, (10, 10))
self.assertEqual(im.convert('RGB').getpixel((0, 0)), (0, 128, 0))
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im.seek(1)
im.load()
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self.assertEqual(im.size, (10, 10))
self.assertEqual(im.convert('RGB').getpixel((0, 0)), (255, 0, 0))
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im.seek(2)
im.load()
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self.assertEqual(im.size, (20, 20))
self.assertEqual(im.convert('RGB').getpixel((0, 0)), (0, 0, 255))
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def test_multipage_last_frame(self):
im = Image.open('Tests/images/multipage-lastframe.tif')
im.load()
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self.assertEqual(im.size, (20, 20))
self.assertEqual(im.convert('RGB').getpixel((0, 0)), (0, 0, 255))
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def test___str__(self):
# Arrange
filename = "Tests/images/pil136.tiff"
im = Image.open(filename)
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# Act
ret = str(im.ifd)
# Assert
self.assertIsInstance(ret, str)
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)
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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)
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# 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)
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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"
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original = hopper("L")
# Act
im = Image.open(test_file)
# Assert
self.assertEqual(im.size, (128, 128))
self.assertEqual(im.mode, "L")
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self.assert_image_similar(im, original, 7.3)
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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)
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if __name__ == '__main__':
unittest.main()
# End of file