mirror of
https://github.com/python-pillow/Pillow.git
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370 lines
12 KiB
Python
370 lines
12 KiB
Python
from __future__ import print_function
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import logging
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import struct
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from helper import unittest, PillowTestCase, hopper, py3
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from PIL import Image, TiffImagePlugin
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logger = logging.getLogger(__name__)
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class TestFileTiff(PillowTestCase):
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def test_sanity(self):
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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()
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self.assertEqual(im.mode, "RGB")
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self.assertEqual(im.size, (128, 128))
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self.assertEqual(im.format, "TIFF")
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hopper("1").save(filename)
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im = Image.open(filename)
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hopper("L").save(filename)
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im = Image.open(filename)
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hopper("P").save(filename)
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im = Image.open(filename)
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hopper("RGB").save(filename)
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im = Image.open(filename)
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hopper("I").save(filename)
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im = Image.open(filename)
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def test_mac_tiff(self):
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# Read RGBa images from Mac OS X [@PIL136]
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filename = "Tests/images/pil136.tiff"
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im = Image.open(filename)
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self.assertEqual(im.mode, "RGBA")
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self.assertEqual(im.size, (55, 43))
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self.assertEqual(im.tile, [('raw', (0, 0, 55, 43), 8, ('RGBa', 0, 1))])
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im.load()
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def test_gimp_tiff(self):
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# Read TIFF JPEG images from GIMP [@PIL168]
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codecs = dir(Image.core)
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if "jpeg_decoder" not in codecs:
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self.skipTest("jpeg support not available")
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filename = "Tests/images/pil168.tif"
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im = Image.open(filename)
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self.assertEqual(im.mode, "RGB")
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self.assertEqual(im.size, (256, 256))
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self.assertEqual(
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im.tile, [
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('jpeg', (0, 0, 256, 64), 8, ('RGB', '')),
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('jpeg', (0, 64, 256, 128), 1215, ('RGB', '')),
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('jpeg', (0, 128, 256, 192), 2550, ('RGB', '')),
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('jpeg', (0, 192, 256, 256), 3890, ('RGB', '')),
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])
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im.load()
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def test_xyres_tiff(self):
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from PIL.TiffImagePlugin import X_RESOLUTION, Y_RESOLUTION
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filename = "Tests/images/pil168.tif"
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im = Image.open(filename)
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#legacy api
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self.assert_(isinstance(im.tag[X_RESOLUTION][0], tuple))
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self.assert_(isinstance(im.tag[Y_RESOLUTION][0], tuple))
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#v2 api
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self.assert_(isinstance(im.tag_v2[X_RESOLUTION], float))
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self.assert_(isinstance(im.tag_v2[Y_RESOLUTION], float))
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self.assertEqual(im.info['dpi'], (72., 72.))
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def test_int_resolution(self):
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from PIL.TiffImagePlugin import X_RESOLUTION, Y_RESOLUTION
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filename = "Tests/images/pil168.tif"
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im = Image.open(filename)
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# Try to read a file where X,Y_RESOLUTION are ints
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im.tag_v2[X_RESOLUTION] = 71
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im.tag_v2[Y_RESOLUTION] = 71
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im._setup()
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self.assertEqual(im.info['dpi'], (71., 71.))
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def test_invalid_file(self):
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invalid_file = "Tests/images/flower.jpg"
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self.assertRaises(SyntaxError,
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lambda: TiffImagePlugin.TiffImageFile(invalid_file))
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def test_bad_exif(self):
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try:
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Image.open('Tests/images/hopper_bad_exif.jpg')._getexif()
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except struct.error:
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self.fail(
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"Bad EXIF data passed incorrect values to _binary unpack")
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def test_save_unsupported_mode(self):
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im = hopper("HSV")
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outfile = self.tempfile("temp.tif")
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self.assertRaises(IOError, lambda: im.save(outfile))
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def test_little_endian(self):
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im = Image.open('Tests/images/16bit.cropped.tif')
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self.assertEqual(im.getpixel((0, 0)), 480)
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self.assertEqual(im.mode, 'I;16')
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b = im.tobytes()
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# Bytes are in image native order (little endian)
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if py3:
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self.assertEqual(b[0], ord(b'\xe0'))
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self.assertEqual(b[1], ord(b'\x01'))
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else:
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self.assertEqual(b[0], b'\xe0')
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self.assertEqual(b[1], b'\x01')
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def test_big_endian(self):
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im = Image.open('Tests/images/16bit.MM.cropped.tif')
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self.assertEqual(im.getpixel((0, 0)), 480)
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self.assertEqual(im.mode, 'I;16B')
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b = im.tobytes()
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# Bytes are in image native order (big endian)
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if py3:
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self.assertEqual(b[0], ord(b'\x01'))
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self.assertEqual(b[1], ord(b'\xe0'))
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else:
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self.assertEqual(b[0], b'\x01')
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self.assertEqual(b[1], b'\xe0')
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def test_12bit_rawmode(self):
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""" Are we generating the same interpretation
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of the image as Imagemagick is? """
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im = Image.open('Tests/images/12bit.cropped.tif')
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# to make the target --
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# convert 12bit.cropped.tif -depth 16 tmp.tif
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# convert tmp.tif -evaluate RightShift 4 12in16bit2.tif
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# imagemagick will auto scale so that a 12bit FFF is 16bit FFF0,
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# so we need to unshift so that the integer values are the same.
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im2 = Image.open('Tests/images/12in16bit.tif')
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logger.debug("%s", [img.getpixel((0, idx))
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for img in [im, im2] for idx in range(3)])
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self.assert_image_equal(im, im2)
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def test_32bit_float(self):
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# Issue 614, specific 32 bit float format
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path = 'Tests/images/10ct_32bit_128.tiff'
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im = Image.open(path)
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im.load()
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self.assertEqual(im.getpixel((0, 0)), -0.4526388943195343)
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self.assertEqual(
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im.getextrema(), (-3.140936851501465, 3.140684127807617))
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def test_n_frames(self):
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im = Image.open('Tests/images/multipage-lastframe.tif')
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self.assertEqual(im.n_frames, 1)
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self.assertFalse(im.is_animated)
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im = Image.open('Tests/images/multipage.tiff')
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self.assertEqual(im.n_frames, 3)
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self.assertTrue(im.is_animated)
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def test_eoferror(self):
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im = Image.open('Tests/images/multipage-lastframe.tif')
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n_frames = im.n_frames
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while True:
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n_frames -= 1
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try:
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im.seek(n_frames)
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break
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except EOFError:
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self.assertTrue(im.tell() < n_frames)
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def test_multipage(self):
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# issue #862
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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))
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self.assertEqual(im.convert('RGB').getpixel((0, 0)), (0, 128, 0))
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im.seek(1)
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im.load()
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self.assertEqual(im.size, (10, 10))
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self.assertEqual(im.convert('RGB').getpixel((0, 0)), (255, 0, 0))
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im.seek(2)
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im.load()
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self.assertEqual(im.size, (20, 20))
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self.assertEqual(im.convert('RGB').getpixel((0, 0)), (0, 0, 255))
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def test_multipage_last_frame(self):
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im = Image.open('Tests/images/multipage-lastframe.tif')
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im.load()
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self.assertEqual(im.size, (20, 20))
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self.assertEqual(im.convert('RGB').getpixel((0, 0)), (0, 0, 255))
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def test___str__(self):
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filename = "Tests/images/pil136.tiff"
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im = Image.open(filename)
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# Act
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ret = str(im.ifd)
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# Assert
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self.assertIsInstance(ret, str)
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def test_as_dict(self):
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# Arrange
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filename = "Tests/images/pil136.tiff"
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im = Image.open(filename)
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# v2 interface
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self.assertEqual(
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im.tag_v2.as_dict(),
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{256: 55, 257: 43, 258: (8, 8, 8, 8), 259: 1,
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262: 2, 296: 2, 273: (8,), 338: (1,), 277: 4,
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279: (9460,), 282: 72.0, 283: 72.0, 284: 1})
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# legacy interface
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self.assertEqual(
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im.tag.as_dict(),
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{256: (55,), 257: (43,), 258: (8, 8, 8, 8), 259: (1,),
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262: (2,), 296: (2,), 273: (8,), 338: (1,), 277: (4,),
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279: (9460,), 282: ((720000, 10000),),
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283: ((720000, 10000),), 284: (1,)})
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def test__delitem__(self):
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filename = "Tests/images/pil136.tiff"
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im = Image.open(filename)
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len_before = len(im.ifd.as_dict())
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del im.ifd[256]
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len_after = len(im.ifd.as_dict())
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self.assertEqual(len_before, len_after + 1)
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def test_load_byte(self):
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for legacy_api in [False, True]:
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ifd = TiffImagePlugin.ImageFileDirectory_v2()
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data = b"abc"
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ret = ifd.load_byte(data, legacy_api)
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self.assertEqual(ret, b"abc" if legacy_api else (97, 98, 99))
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def test_load_string(self):
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ifd = TiffImagePlugin.ImageFileDirectory_v2()
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data = b"abc\0"
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ret = ifd.load_string(data, False)
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self.assertEqual(ret, "abc")
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def test_load_float(self):
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ifd = TiffImagePlugin.ImageFileDirectory_v2()
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data = b"abcdabcd"
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ret = ifd.load_float(data, False)
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self.assertEqual(ret, (1.6777999408082104e+22, 1.6777999408082104e+22))
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def test_load_double(self):
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ifd = TiffImagePlugin.ImageFileDirectory_v2()
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data = b"abcdefghabcdefgh"
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ret = ifd.load_double(data, False)
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self.assertEqual(ret, (8.540883223036124e+194, 8.540883223036124e+194))
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def test_seek(self):
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filename = "Tests/images/pil136.tiff"
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im = Image.open(filename)
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im.seek(-1)
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self.assertEqual(im.tell(), 0)
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def test_seek_eof(self):
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filename = "Tests/images/pil136.tiff"
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im = Image.open(filename)
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self.assertEqual(im.tell(), 0)
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self.assertRaises(EOFError, lambda: im.seek(1))
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def test__limit_rational_int(self):
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from PIL.TiffImagePlugin import _limit_rational
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value = 34
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ret = _limit_rational(value, 65536)
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self.assertEqual(ret, (34, 1))
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def test__limit_rational_float(self):
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from PIL.TiffImagePlugin import _limit_rational
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value = 22.3
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ret = _limit_rational(value, 65536)
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self.assertEqual(ret, (223, 10))
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def test_4bit(self):
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test_file = "Tests/images/hopper_gray_4bpp.tif"
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original = hopper("L")
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im = Image.open(test_file)
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self.assertEqual(im.size, (128, 128))
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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):
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# Issue 973
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# Test TIFF with tag 297 (Page Number) having value of 0 0.
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# The first number is the current page number.
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# The second is the total number of pages, zero means not available.
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outfile = self.tempfile("temp.tif")
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# Created by printing a page in Chrome to PDF, then:
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# /usr/bin/gs -q -sDEVICE=tiffg3 -sOutputFile=total-pages-zero.tif
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# -dNOPAUSE /tmp/test.pdf -c quit
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infile = "Tests/images/total-pages-zero.tif"
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im = Image.open(infile)
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# Should not divide by zero
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im.save(outfile)
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def test_with_underscores(self):
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kwargs = {'resolution_unit': 'inch',
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'x_resolution': 72,
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'y_resolution': 36}
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filename = self.tempfile("temp.tif")
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hopper("RGB").save(filename, **kwargs)
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from PIL.TiffImagePlugin import X_RESOLUTION, Y_RESOLUTION
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im = Image.open(filename)
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# legacy interface
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self.assertEqual(im.tag[X_RESOLUTION][0][0], 72)
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self.assertEqual(im.tag[Y_RESOLUTION][0][0], 36)
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# v2 interface
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self.assertEqual(im.tag_v2[X_RESOLUTION], 72)
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self.assertEqual(im.tag_v2[Y_RESOLUTION], 36)
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def test_deprecation_warning_with_spaces(self):
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kwargs = {'resolution unit': 'inch',
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'x resolution': 36,
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'y resolution': 72}
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filename = self.tempfile("temp.tif")
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self.assert_warning(DeprecationWarning,
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lambda: hopper("RGB").save(filename, **kwargs))
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from PIL.TiffImagePlugin import X_RESOLUTION, Y_RESOLUTION
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im = Image.open(filename)
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# legacy interface
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self.assertEqual(im.tag[X_RESOLUTION][0][0], 36)
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self.assertEqual(im.tag[Y_RESOLUTION][0][0], 72)
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# v2 interface
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self.assertEqual(im.tag_v2[X_RESOLUTION], 36)
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self.assertEqual(im.tag_v2[Y_RESOLUTION], 72)
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if __name__ == '__main__':
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unittest.main()
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# End of file
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