import io import struct from PIL import Image, TiffImagePlugin, TiffTags from PIL.TiffImagePlugin import IFDRational, _limit_rational from .helper import PillowTestCase, hopper tag_ids = {info.name: info.value for info in TiffTags.TAGS_V2.values()} class TestFileTiffMetadata(PillowTestCase): def test_rt_metadata(self): """ Test writing arbitrary metadata into the tiff image directory Use case is ImageJ private tags, one numeric, one arbitrary data. https://github.com/python-pillow/Pillow/issues/291 """ img = hopper() # Behaviour change: re #1416 # Pre ifd rewrite, ImageJMetaData was being written as a string(2), # Post ifd rewrite, it's defined as arbitrary bytes(7). It should # roundtrip with the actual bytes, rather than stripped text # of the premerge tests. # # For text items, we still have to decode('ascii','replace') because # the tiff file format can't take 8 bit bytes in that field. basetextdata = "This is some arbitrary metadata for a text field" bindata = basetextdata.encode("ascii") + b" \xff" textdata = basetextdata + " " + chr(255) reloaded_textdata = basetextdata + " ?" floatdata = 12.345 doubledata = 67.89 info = TiffImagePlugin.ImageFileDirectory() ImageJMetaData = tag_ids["ImageJMetaData"] ImageJMetaDataByteCounts = tag_ids["ImageJMetaDataByteCounts"] ImageDescription = tag_ids["ImageDescription"] info[ImageJMetaDataByteCounts] = len(bindata) info[ImageJMetaData] = bindata info[tag_ids["RollAngle"]] = floatdata info.tagtype[tag_ids["RollAngle"]] = 11 info[tag_ids["YawAngle"]] = doubledata info.tagtype[tag_ids["YawAngle"]] = 12 info[ImageDescription] = textdata f = self.tempfile("temp.tif") img.save(f, tiffinfo=info) with Image.open(f) as loaded: self.assertEqual(loaded.tag[ImageJMetaDataByteCounts], (len(bindata),)) self.assertEqual(loaded.tag_v2[ImageJMetaDataByteCounts], (len(bindata),)) self.assertEqual(loaded.tag[ImageJMetaData], bindata) self.assertEqual(loaded.tag_v2[ImageJMetaData], bindata) self.assertEqual(loaded.tag[ImageDescription], (reloaded_textdata,)) self.assertEqual(loaded.tag_v2[ImageDescription], reloaded_textdata) loaded_float = loaded.tag[tag_ids["RollAngle"]][0] self.assertAlmostEqual(loaded_float, floatdata, places=5) loaded_double = loaded.tag[tag_ids["YawAngle"]][0] self.assertAlmostEqual(loaded_double, doubledata) # check with 2 element ImageJMetaDataByteCounts, issue #2006 info[ImageJMetaDataByteCounts] = (8, len(bindata) - 8) img.save(f, tiffinfo=info) with Image.open(f) as loaded: self.assertEqual( loaded.tag[ImageJMetaDataByteCounts], (8, len(bindata) - 8) ) self.assertEqual( loaded.tag_v2[ImageJMetaDataByteCounts], (8, len(bindata) - 8) ) def test_read_metadata(self): with Image.open("Tests/images/hopper_g4.tif") as img: self.assertEqual( { "YResolution": IFDRational(4294967295, 113653537), "PlanarConfiguration": 1, "BitsPerSample": (1,), "ImageLength": 128, "Compression": 4, "FillOrder": 1, "RowsPerStrip": 128, "ResolutionUnit": 3, "PhotometricInterpretation": 0, "PageNumber": (0, 1), "XResolution": IFDRational(4294967295, 113653537), "ImageWidth": 128, "Orientation": 1, "StripByteCounts": (1968,), "SamplesPerPixel": 1, "StripOffsets": (8,), }, img.tag_v2.named(), ) self.assertEqual( { "YResolution": ((4294967295, 113653537),), "PlanarConfiguration": (1,), "BitsPerSample": (1,), "ImageLength": (128,), "Compression": (4,), "FillOrder": (1,), "RowsPerStrip": (128,), "ResolutionUnit": (3,), "PhotometricInterpretation": (0,), "PageNumber": (0, 1), "XResolution": ((4294967295, 113653537),), "ImageWidth": (128,), "Orientation": (1,), "StripByteCounts": (1968,), "SamplesPerPixel": (1,), "StripOffsets": (8,), }, img.tag.named(), ) def test_write_metadata(self): """ Test metadata writing through the python code """ with Image.open("Tests/images/hopper.tif") as img: f = self.tempfile("temp.tiff") img.save(f, tiffinfo=img.tag) original = img.tag_v2.named() with Image.open(f) as loaded: reloaded = loaded.tag_v2.named() for k, v in original.items(): if isinstance(v, IFDRational): original[k] = IFDRational(*_limit_rational(v, 2 ** 31)) elif isinstance(v, tuple) and isinstance(v[0], IFDRational): original[k] = tuple( IFDRational(*_limit_rational(elt, 2 ** 31)) for elt in v ) ignored = ["StripByteCounts", "RowsPerStrip", "PageNumber", "StripOffsets"] for tag, value in reloaded.items(): if tag in ignored: continue if isinstance(original[tag], tuple) and isinstance( original[tag][0], IFDRational ): # Need to compare element by element in the tuple, # not comparing tuples of object references self.assert_deep_equal( original[tag], value, "{} didn't roundtrip, {}, {}".format(tag, original[tag], value), ) else: self.assertEqual( original[tag], value, "{} didn't roundtrip, {}, {}".format(tag, original[tag], value), ) for tag, value in original.items(): if tag not in ignored: self.assertEqual(value, reloaded[tag], "%s didn't roundtrip" % tag) def test_no_duplicate_50741_tag(self): self.assertEqual(tag_ids["MakerNoteSafety"], 50741) self.assertEqual(tag_ids["BestQualityScale"], 50780) def test_empty_metadata(self): f = io.BytesIO(b"II*\x00\x08\x00\x00\x00") head = f.read(8) info = TiffImagePlugin.ImageFileDirectory(head) # Should not raise struct.error. self.assert_warning(UserWarning, info.load, f) def test_iccprofile(self): # https://github.com/python-pillow/Pillow/issues/1462 out = self.tempfile("temp.tiff") with Image.open("Tests/images/hopper.iccprofile.tif") as im: im.save(out) with Image.open(out) as reloaded: self.assertNotIsInstance(im.info["icc_profile"], tuple) self.assertEqual(im.info["icc_profile"], reloaded.info["icc_profile"]) def test_iccprofile_binary(self): # https://github.com/python-pillow/Pillow/issues/1526 # We should be able to load this, # but probably won't be able to save it. with Image.open("Tests/images/hopper.iccprofile_binary.tif") as im: self.assertEqual(im.tag_v2.tagtype[34675], 1) self.assertTrue(im.info["icc_profile"]) def test_iccprofile_save_png(self): with Image.open("Tests/images/hopper.iccprofile.tif") as im: outfile = self.tempfile("temp.png") im.save(outfile) def test_iccprofile_binary_save_png(self): with Image.open("Tests/images/hopper.iccprofile_binary.tif") as im: outfile = self.tempfile("temp.png") im.save(outfile) def test_exif_div_zero(self): im = hopper() info = TiffImagePlugin.ImageFileDirectory_v2() info[41988] = TiffImagePlugin.IFDRational(0, 0) out = self.tempfile("temp.tiff") im.save(out, tiffinfo=info, compression="raw") with Image.open(out) as reloaded: self.assertEqual(0, reloaded.tag_v2[41988].numerator) self.assertEqual(0, reloaded.tag_v2[41988].denominator) def test_empty_values(self): data = io.BytesIO( b"II*\x00\x08\x00\x00\x00\x03\x00\x1a\x01\x05\x00\x00\x00\x00\x00" b"\x00\x00\x00\x00\x1b\x01\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00" b"\x98\x82\x02\x00\x07\x00\x00\x002\x00\x00\x00\x00\x00\x00\x00a " b"text\x00\x00" ) head = data.read(8) info = TiffImagePlugin.ImageFileDirectory_v2(head) info.load(data) # Should not raise ValueError. info = dict(info) self.assertIn(33432, info) def test_PhotoshopInfo(self): with Image.open("Tests/images/issue_2278.tif") as im: self.assertEqual(len(im.tag_v2[34377]), 1) self.assertIsInstance(im.tag_v2[34377][0], bytes) out = self.tempfile("temp.tiff") im.save(out) with Image.open(out) as reloaded: self.assertEqual(len(reloaded.tag_v2[34377]), 1) self.assertIsInstance(reloaded.tag_v2[34377][0], bytes) def test_too_many_entries(self): ifd = TiffImagePlugin.ImageFileDirectory_v2() # 277: ("SamplesPerPixel", SHORT, 1), ifd._tagdata[277] = struct.pack("hh", 4, 4) ifd.tagtype[277] = TiffTags.SHORT # Should not raise ValueError. self.assert_warning(UserWarning, lambda: ifd[277])