import io import struct from helper import unittest, PillowTestCase, hopper from PIL import Image, TiffImagePlugin, TiffTags from PIL.TiffImagePlugin import _limit_rational, IFDRational 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) loaded = Image.open(f) 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) loaded = Image.open(f) self.assertEqual(loaded.tag[ImageJMetaDataByteCounts], (8, len(bindata) - 8)) self.assertEqual(loaded.tag_v2[ImageJMetaDataByteCounts], (8, len(bindata) - 8)) def test_read_metadata(self): img = Image.open('Tests/images/hopper_g4.tif') 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 """ img = Image.open('Tests/images/hopper.tif') f = self.tempfile('temp.tiff') img.save(f, tiffinfo=img.tag) loaded = Image.open(f) original = img.tag_v2.named() 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, "%s didn't roundtrip, %s, %s" % (tag, original[tag], value)) else: self.assertEqual(original[tag], value, "%s didn't roundtrip, %s, %s" % (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 im = Image.open('Tests/images/hopper.iccprofile.tif') out = self.tempfile('temp.tiff') im.save(out) reloaded = Image.open(out) 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. im = Image.open('Tests/images/hopper.iccprofile_binary.tif') self.assertEqual(im.tag_v2.tagtype[34675], 1) self.assertTrue(im.info['icc_profile']) def test_iccprofile_save_png(self): im = Image.open('Tests/images/hopper.iccprofile.tif') outfile = self.tempfile('temp.png') im.save(outfile) def test_iccprofile_binary_save_png(self): im = Image.open('Tests/images/hopper.iccprofile_binary.tif') 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') reloaded = Image.open(out) self.assertEqual(0, reloaded.tag_v2[41988].numerator) self.assertEqual(0, reloaded.tag_v2[41988].denominator) def test_expty_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): im = Image.open('Tests/images/issue_2278.tif') self.assertIsInstance(im.tag_v2[34377], bytes) out = self.tempfile('temp.tiff') im.save(out) reloaded = Image.open(out) self.assertIsInstance(reloaded.tag_v2[34377], 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]) if __name__ == '__main__': unittest.main()