mirror of
https://github.com/python-pillow/Pillow.git
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620 lines
21 KiB
Python
620 lines
21 KiB
Python
import logging
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import os
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import unittest
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from io import BytesIO
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import pytest
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from PIL import Image, TiffImagePlugin
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from PIL.TiffImagePlugin import RESOLUTION_UNIT, X_RESOLUTION, Y_RESOLUTION
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from .helper import (
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PillowTestCase,
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assert_image_equal,
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assert_image_equal_tofile,
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assert_image_similar,
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assert_image_similar_tofile,
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hopper,
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is_pypy,
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is_win32,
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)
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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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with Image.open(filename) as im:
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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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with Image.open(filename):
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pass
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hopper("L").save(filename)
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with Image.open(filename):
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pass
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hopper("P").save(filename)
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with Image.open(filename):
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pass
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hopper("RGB").save(filename)
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with Image.open(filename):
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pass
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hopper("I").save(filename)
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with Image.open(filename):
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pass
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@unittest.skipIf(is_pypy(), "Requires CPython")
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def test_unclosed_file(self):
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def open():
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im = Image.open("Tests/images/multipage.tiff")
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im.load()
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pytest.warns(ResourceWarning, open)
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def test_closed_file(self):
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def open():
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im = Image.open("Tests/images/multipage.tiff")
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im.load()
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im.close()
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pytest.warns(None, open)
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def test_context_manager(self):
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def open():
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with Image.open("Tests/images/multipage.tiff") as im:
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im.load()
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pytest.warns(None, open)
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def test_mac_tiff(self):
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# Read RGBa images from macOS [@PIL136]
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filename = "Tests/images/pil136.tiff"
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with Image.open(filename) as im:
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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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assert_image_similar_tofile(im, "Tests/images/pil136.png", 1)
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def test_wrong_bits_per_sample(self):
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with Image.open("Tests/images/tiff_wrong_bits_per_sample.tiff") as im:
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self.assertEqual(im.mode, "RGBA")
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self.assertEqual(im.size, (52, 53))
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self.assertEqual(im.tile, [("raw", (0, 0, 52, 53), 160, ("RGBA", 0, 1))])
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im.load()
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def test_set_legacy_api(self):
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ifd = TiffImagePlugin.ImageFileDirectory_v2()
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with self.assertRaises(Exception) as e:
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ifd.legacy_api = None
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self.assertEqual(str(e.exception), "Not allowing setting of legacy api")
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def test_xyres_tiff(self):
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filename = "Tests/images/pil168.tif"
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with Image.open(filename) as im:
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# legacy api
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self.assertIsInstance(im.tag[X_RESOLUTION][0], tuple)
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self.assertIsInstance(im.tag[Y_RESOLUTION][0], tuple)
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# v2 api
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self.assertIsInstance(im.tag_v2[X_RESOLUTION], TiffImagePlugin.IFDRational)
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self.assertIsInstance(im.tag_v2[Y_RESOLUTION], TiffImagePlugin.IFDRational)
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self.assertEqual(im.info["dpi"], (72.0, 72.0))
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def test_xyres_fallback_tiff(self):
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filename = "Tests/images/compression.tif"
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with Image.open(filename) as im:
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# v2 api
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self.assertIsInstance(im.tag_v2[X_RESOLUTION], TiffImagePlugin.IFDRational)
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self.assertIsInstance(im.tag_v2[Y_RESOLUTION], TiffImagePlugin.IFDRational)
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self.assertRaises(KeyError, lambda: im.tag_v2[RESOLUTION_UNIT])
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# Legacy.
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self.assertEqual(im.info["resolution"], (100.0, 100.0))
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# Fallback "inch".
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self.assertEqual(im.info["dpi"], (100.0, 100.0))
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def test_int_resolution(self):
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filename = "Tests/images/pil168.tif"
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with Image.open(filename) as im:
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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"], (71.0, 71.0))
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def test_load_dpi_rounding(self):
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for resolutionUnit, dpi in ((None, (72, 73)), (2, (72, 73)), (3, (183, 185))):
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with Image.open(
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"Tests/images/hopper_roundDown_" + str(resolutionUnit) + ".tif"
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) as im:
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self.assertEqual(im.tag_v2.get(RESOLUTION_UNIT), resolutionUnit)
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self.assertEqual(im.info["dpi"], (dpi[0], dpi[0]))
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with Image.open(
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"Tests/images/hopper_roundUp_" + str(resolutionUnit) + ".tif"
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) as im:
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self.assertEqual(im.tag_v2.get(RESOLUTION_UNIT), resolutionUnit)
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self.assertEqual(im.info["dpi"], (dpi[1], dpi[1]))
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def test_save_dpi_rounding(self):
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outfile = self.tempfile("temp.tif")
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with Image.open("Tests/images/hopper.tif") as im:
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for dpi in (72.2, 72.8):
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im.save(outfile, dpi=(dpi, dpi))
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with Image.open(outfile) as reloaded:
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reloaded.load()
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self.assertEqual((round(dpi), round(dpi)), reloaded.info["dpi"])
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def test_save_setting_missing_resolution(self):
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b = BytesIO()
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Image.open("Tests/images/10ct_32bit_128.tiff").save(
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b, format="tiff", resolution=123.45
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)
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with Image.open(b) as im:
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self.assertEqual(float(im.tag_v2[X_RESOLUTION]), 123.45)
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self.assertEqual(float(im.tag_v2[Y_RESOLUTION]), 123.45)
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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, TiffImagePlugin.TiffImageFile, invalid_file)
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TiffImagePlugin.PREFIXES.append(b"\xff\xd8\xff\xe0")
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self.assertRaises(SyntaxError, TiffImagePlugin.TiffImageFile, invalid_file)
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TiffImagePlugin.PREFIXES.pop()
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def test_bad_exif(self):
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with Image.open("Tests/images/hopper_bad_exif.jpg") as i:
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# Should not raise struct.error.
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pytest.warns(UserWarning, i._getexif)
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def test_save_rgba(self):
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im = hopper("RGBA")
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outfile = self.tempfile("temp.tif")
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im.save(outfile)
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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, im.save, outfile)
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def test_little_endian(self):
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with Image.open("Tests/images/16bit.cropped.tif") as im:
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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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self.assertEqual(b[0], ord(b"\xe0"))
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self.assertEqual(b[1], ord(b"\x01"))
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def test_big_endian(self):
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with Image.open("Tests/images/16bit.MM.cropped.tif") as im:
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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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self.assertEqual(b[0], ord(b"\x01"))
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self.assertEqual(b[1], ord(b"\xe0"))
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def test_16bit_s(self):
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with Image.open("Tests/images/16bit.s.tif") as im:
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im.load()
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self.assertEqual(im.mode, "I")
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self.assertEqual(im.getpixel((0, 0)), 32767)
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self.assertEqual(im.getpixel((0, 1)), 0)
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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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with Image.open("Tests/images/12bit.cropped.tif") as im:
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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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assert_image_equal_tofile(im, "Tests/images/12in16bit.tif")
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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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with Image.open(path) as im:
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im.load()
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self.assertEqual(im.getpixel((0, 0)), -0.4526388943195343)
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self.assertEqual(im.getextrema(), (-3.140936851501465, 3.140684127807617))
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def test_unknown_pixel_mode(self):
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self.assertRaises(
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IOError, Image.open, "Tests/images/hopper_unknown_pixel_mode.tif"
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)
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def test_n_frames(self):
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for path, n_frames in [
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["Tests/images/multipage-lastframe.tif", 1],
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["Tests/images/multipage.tiff", 3],
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]:
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with Image.open(path) as im:
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self.assertEqual(im.n_frames, n_frames)
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self.assertEqual(im.is_animated, n_frames != 1)
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def test_eoferror(self):
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with Image.open("Tests/images/multipage-lastframe.tif") as im:
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n_frames = im.n_frames
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# Test seeking past the last frame
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self.assertRaises(EOFError, im.seek, n_frames)
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self.assertLess(im.tell(), n_frames)
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# Test that seeking to the last frame does not raise an error
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im.seek(n_frames - 1)
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def test_multipage(self):
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# issue #862
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with Image.open("Tests/images/multipage.tiff") as im:
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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(0)
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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)), (0, 128, 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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with Image.open("Tests/images/multipage-lastframe.tif") as im:
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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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with Image.open(filename) as im:
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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_dict(self):
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# Arrange
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filename = "Tests/images/pil136.tiff"
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with Image.open(filename) as im:
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# v2 interface
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v2_tags = {
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256: 55,
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257: 43,
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258: (8, 8, 8, 8),
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259: 1,
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262: 2,
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296: 2,
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273: (8,),
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338: (1,),
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277: 4,
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279: (9460,),
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282: 72.0,
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283: 72.0,
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284: 1,
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}
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self.assertEqual(dict(im.tag_v2), v2_tags)
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# legacy interface
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legacy_tags = {
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256: (55,),
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257: (43,),
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258: (8, 8, 8, 8),
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259: (1,),
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262: (2,),
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296: (2,),
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273: (8,),
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338: (1,),
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277: (4,),
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279: (9460,),
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282: ((720000, 10000),),
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283: ((720000, 10000),),
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284: (1,),
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}
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self.assertEqual(dict(im.tag), legacy_tags)
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def test__delitem__(self):
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filename = "Tests/images/pil136.tiff"
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with Image.open(filename) as im:
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len_before = len(dict(im.ifd))
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del im.ifd[256]
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len_after = len(dict(im.ifd))
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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")
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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, (1.6777999408082104e22, 1.6777999408082104e22))
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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, (8.540883223036124e194, 8.540883223036124e194))
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def test_seek(self):
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filename = "Tests/images/pil136.tiff"
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with Image.open(filename) as im:
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im.seek(0)
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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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with Image.open(filename) as im:
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self.assertEqual(im.tell(), 0)
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self.assertRaises(EOFError, im.seek, -1)
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self.assertRaises(EOFError, 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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with Image.open(test_file) as im:
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self.assertEqual(im.size, (128, 128))
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self.assertEqual(im.mode, "L")
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assert_image_similar(im, original, 7.3)
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def test_gray_semibyte_per_pixel(self):
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test_files = (
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(
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24.8, # epsilon
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( # group
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"Tests/images/tiff_gray_2_4_bpp/hopper2.tif",
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"Tests/images/tiff_gray_2_4_bpp/hopper2I.tif",
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"Tests/images/tiff_gray_2_4_bpp/hopper2R.tif",
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"Tests/images/tiff_gray_2_4_bpp/hopper2IR.tif",
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),
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),
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(
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7.3, # epsilon
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( # group
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"Tests/images/tiff_gray_2_4_bpp/hopper4.tif",
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"Tests/images/tiff_gray_2_4_bpp/hopper4I.tif",
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"Tests/images/tiff_gray_2_4_bpp/hopper4R.tif",
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"Tests/images/tiff_gray_2_4_bpp/hopper4IR.tif",
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),
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),
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)
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original = hopper("L")
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for epsilon, group in test_files:
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with Image.open(group[0]) as im:
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self.assertEqual(im.size, (128, 128))
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self.assertEqual(im.mode, "L")
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assert_image_similar(im, original, epsilon)
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for file in group[1:]:
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with Image.open(file) as im2:
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self.assertEqual(im2.size, (128, 128))
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self.assertEqual(im2.mode, "L")
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assert_image_equal(im, im2)
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def test_with_underscores(self):
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kwargs = {"resolution_unit": "inch", "x_resolution": 72, "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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with Image.open(filename) as im:
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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_roundtrip_tiff_uint16(self):
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# Test an image of all '0' values
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pixel_value = 0x1234
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infile = "Tests/images/uint16_1_4660.tif"
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with Image.open(infile) as im:
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self.assertEqual(im.getpixel((0, 0)), pixel_value)
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tmpfile = self.tempfile("temp.tif")
|
|
im.save(tmpfile)
|
|
|
|
with Image.open(tmpfile) as reloaded:
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|
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 \
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|
# tiff_strip_raw.tif tiff_strip_planar_raw.tiff
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|
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):
|
|
for mode in ["P", "PA"]:
|
|
outfile = self.tempfile("temp.tif")
|
|
|
|
im = hopper(mode)
|
|
im.save(outfile)
|
|
|
|
with Image.open(outfile) as reloaded:
|
|
assert_image_equal(im.convert("RGB"), reloaded.convert("RGB"))
|
|
|
|
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:
|
|
self.assertEqual(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:
|
|
self.assertEqual(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:
|
|
self.assertEqual(reread.n_frames, 3)
|
|
|
|
def test_saving_icc_profile(self):
|
|
# 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 = self.tempfile("temp.tif")
|
|
im.save(tmpfile, "TIFF", compression="raw")
|
|
with Image.open(tmpfile) as reloaded:
|
|
self.assertEqual(b"Dummy value", reloaded.info["icc_profile"])
|
|
|
|
def test_close_on_load_exclusive(self):
|
|
# similar to test_fd_leak, but runs on unixlike os
|
|
tmpfile = self.tempfile("temp.tif")
|
|
|
|
with Image.open("Tests/images/uint16_1_4660.tif") as im:
|
|
im.save(tmpfile)
|
|
|
|
im = Image.open(tmpfile)
|
|
fp = im.fp
|
|
self.assertFalse(fp.closed)
|
|
im.load()
|
|
self.assertTrue(fp.closed)
|
|
|
|
def test_close_on_load_nonexclusive(self):
|
|
tmpfile = self.tempfile("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
|
|
self.assertFalse(fp.closed)
|
|
im.load()
|
|
self.assertFalse(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 self.assertRaises(ValueError):
|
|
Image.open("Tests/images/string_dimension.tiff")
|
|
|
|
|
|
@unittest.skipUnless(is_win32(), "Windows only")
|
|
class TestFileTiffW32(PillowTestCase):
|
|
def test_fd_leak(self):
|
|
tmpfile = self.tempfile("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
|
|
self.assertFalse(fp.closed)
|
|
self.assertRaises(WindowsError, os.remove, tmpfile)
|
|
im.load()
|
|
self.assertTrue(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)
|