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642 lines
21 KiB
Python
642 lines
21 KiB
Python
import os
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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, SUBIFD, X_RESOLUTION, Y_RESOLUTION
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from .helper import (
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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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class TestFileTiff:
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def test_sanity(self, tmp_path):
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filename = str(tmp_path / "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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assert im.mode == "RGB"
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assert im.size == (128, 128)
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assert 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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@pytest.mark.skipif(is_pypy(), reason="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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assert im.mode == "RGBA"
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assert im.size == (55, 43)
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assert 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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assert im.mode == "RGBA"
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assert im.size == (52, 53)
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assert 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 pytest.raises(Exception) as e:
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ifd.legacy_api = None
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assert str(e.value) == "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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assert isinstance(im.tag[X_RESOLUTION][0], tuple)
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assert isinstance(im.tag[Y_RESOLUTION][0], tuple)
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# v2 api
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assert isinstance(im.tag_v2[X_RESOLUTION], TiffImagePlugin.IFDRational)
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assert isinstance(im.tag_v2[Y_RESOLUTION], TiffImagePlugin.IFDRational)
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assert 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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assert isinstance(im.tag_v2[X_RESOLUTION], TiffImagePlugin.IFDRational)
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assert isinstance(im.tag_v2[Y_RESOLUTION], TiffImagePlugin.IFDRational)
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with pytest.raises(KeyError):
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im.tag_v2[RESOLUTION_UNIT]
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# Legacy.
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assert im.info["resolution"] == (100.0, 100.0)
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# Fallback "inch".
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assert 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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assert 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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assert im.tag_v2.get(RESOLUTION_UNIT) == resolutionUnit
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assert 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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assert im.tag_v2.get(RESOLUTION_UNIT) == resolutionUnit
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assert im.info["dpi"] == (dpi[1], dpi[1])
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def test_save_dpi_rounding(self, tmp_path):
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outfile = str(tmp_path / "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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assert (round(dpi), round(dpi)) == reloaded.info["dpi"]
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def test_subifd(self, tmp_path):
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outfile = str(tmp_path / "temp.tif")
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with Image.open("Tests/images/g4_orientation_6.tif") as im:
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im.tag_v2[SUBIFD] = 10000
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# Should not segfault
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im.save(outfile)
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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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assert float(im.tag_v2[X_RESOLUTION]) == 123.45
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assert 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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with pytest.raises(SyntaxError):
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TiffImagePlugin.TiffImageFile(invalid_file)
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TiffImagePlugin.PREFIXES.append(b"\xff\xd8\xff\xe0")
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with pytest.raises(SyntaxError):
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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, tmp_path):
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im = hopper("RGBA")
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outfile = str(tmp_path / "temp.tif")
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im.save(outfile)
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def test_save_unsupported_mode(self, tmp_path):
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im = hopper("HSV")
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outfile = str(tmp_path / "temp.tif")
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with pytest.raises(OSError):
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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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assert im.getpixel((0, 0)) == 480
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assert 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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assert b[0] == ord(b"\xe0")
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assert 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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assert im.getpixel((0, 0)) == 480
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assert 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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assert b[0] == ord(b"\x01")
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assert 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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assert im.mode == "I"
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assert im.getpixel((0, 0)) == 32767
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assert 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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assert im.getpixel((0, 0)) == -0.4526388943195343
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assert im.getextrema() == (-3.140936851501465, 3.140684127807617)
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def test_unknown_pixel_mode(self):
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with pytest.raises(OSError):
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Image.open("Tests/images/hopper_unknown_pixel_mode.tif")
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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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assert im.n_frames == n_frames
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assert 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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with pytest.raises(EOFError):
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im.seek(n_frames)
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assert 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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assert im.size == (10, 10)
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assert 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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assert im.size == (10, 10)
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assert 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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assert im.size == (10, 10)
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assert 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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assert im.size == (20, 20)
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assert 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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assert im.size == (20, 20)
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assert 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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assert isinstance(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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assert 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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assert 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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assert 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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assert 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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assert 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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assert 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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assert ret == (8.540883223036124e194, 8.540883223036124e194)
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def test_ifd_tag_type(self):
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with Image.open("Tests/images/ifd_tag_type.tiff") as im:
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assert 0x8825 in im.tag_v2
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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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assert 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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assert im.tell() == 0
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with pytest.raises(EOFError):
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im.seek(-1)
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with pytest.raises(EOFError):
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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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assert 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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assert 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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assert im.size == (128, 128)
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assert 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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assert im.size == (128, 128)
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assert 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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assert im2.size == (128, 128)
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assert im2.mode == "L"
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assert_image_equal(im, im2)
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def test_with_underscores(self, tmp_path):
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kwargs = {"resolution_unit": "inch", "x_resolution": 72, "y_resolution": 36}
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filename = str(tmp_path / "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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assert im.tag[X_RESOLUTION][0][0] == 72
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assert im.tag[Y_RESOLUTION][0][0] == 36
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# v2 interface
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assert im.tag_v2[X_RESOLUTION] == 72
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assert im.tag_v2[Y_RESOLUTION] == 36
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def test_roundtrip_tiff_uint16(self, tmp_path):
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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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assert im.getpixel((0, 0)) == pixel_value
|
|
|
|
tmpfile = str(tmp_path / "temp.tif")
|
|
im.save(tmpfile)
|
|
|
|
with Image.open(tmpfile) as reloaded:
|
|
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 \
|
|
# tiff_strip_raw.tif tiff_strip_planar_raw.tiff
|
|
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, tmp_path):
|
|
def roundtrip(mode):
|
|
outfile = str(tmp_path / "temp.tif")
|
|
|
|
im = hopper(mode)
|
|
im.save(outfile)
|
|
|
|
with Image.open(outfile) as reloaded:
|
|
assert_image_equal(im.convert("RGB"), reloaded.convert("RGB"))
|
|
|
|
for mode in ["P", "PA"]:
|
|
roundtrip(mode)
|
|
|
|
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:
|
|
assert 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:
|
|
assert 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:
|
|
assert reread.n_frames == 3
|
|
|
|
def test_saving_icc_profile(self, tmp_path):
|
|
# 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 = str(tmp_path / "temp.tif")
|
|
im.save(tmpfile, "TIFF", compression="raw")
|
|
with Image.open(tmpfile) as reloaded:
|
|
assert b"Dummy value" == reloaded.info["icc_profile"]
|
|
|
|
def test_close_on_load_exclusive(self, tmp_path):
|
|
# similar to test_fd_leak, but runs on unixlike os
|
|
tmpfile = str(tmp_path / "temp.tif")
|
|
|
|
with Image.open("Tests/images/uint16_1_4660.tif") as im:
|
|
im.save(tmpfile)
|
|
|
|
im = Image.open(tmpfile)
|
|
fp = im.fp
|
|
assert not fp.closed
|
|
im.load()
|
|
assert fp.closed
|
|
|
|
def test_close_on_load_nonexclusive(self, tmp_path):
|
|
tmpfile = str(tmp_path / "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
|
|
assert not fp.closed
|
|
im.load()
|
|
assert not 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")
|
|
@pytest.mark.skipif(
|
|
not os.path.exists("Tests/images/string_dimension.tiff"),
|
|
reason="Extra image files not installed",
|
|
)
|
|
def test_string_dimension(self):
|
|
# Assert that an error is raised if one of the dimensions is a string
|
|
with pytest.raises(ValueError):
|
|
Image.open("Tests/images/string_dimension.tiff")
|
|
|
|
|
|
@pytest.mark.skipif(not is_win32(), reason="Windows only")
|
|
class TestFileTiffW32:
|
|
def test_fd_leak(self, tmp_path):
|
|
tmpfile = str(tmp_path / "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
|
|
assert not fp.closed
|
|
with pytest.raises(OSError):
|
|
os.remove(tmpfile)
|
|
im.load()
|
|
assert 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)
|