import base64 import io import itertools import logging import os from collections import namedtuple from ctypes import c_float import pytest from PIL import Image, ImageFilter, TiffImagePlugin, TiffTags from .helper import ( PillowTestCase, assert_image_equal, assert_image_equal_tofile, assert_image_similar, assert_image_similar_tofile, hopper, skip_unless_feature, ) logger = logging.getLogger(__name__) @skip_unless_feature("libtiff") class LibTiffTestCase(PillowTestCase): def _assert_noerr(self, im): """Helper tests that assert basic sanity about the g4 tiff reading""" # 1 bit assert im.mode == "1" # Does the data actually load im.load() im.getdata() try: assert im._compression == "group4" except AttributeError: print("No _compression") print(dir(im)) # can we write it back out, in a different form. out = self.tempfile("temp.png") im.save(out) out_bytes = io.BytesIO() im.save(out_bytes, format="tiff", compression="group4") class TestFileLibTiff(LibTiffTestCase): def test_g4_tiff(self): """Test the ordinary file path load path""" test_file = "Tests/images/hopper_g4_500.tif" with Image.open(test_file) as im: assert im.size == (500, 500) self._assert_noerr(im) def test_g4_large(self): test_file = "Tests/images/pport_g4.tif" with Image.open(test_file) as im: self._assert_noerr(im) def test_g4_tiff_file(self): """Testing the string load path""" test_file = "Tests/images/hopper_g4_500.tif" with open(test_file, "rb") as f: with Image.open(f) as im: assert im.size == (500, 500) self._assert_noerr(im) def test_g4_tiff_bytesio(self): """Testing the stringio loading code path""" test_file = "Tests/images/hopper_g4_500.tif" s = io.BytesIO() with open(test_file, "rb") as f: s.write(f.read()) s.seek(0) with Image.open(s) as im: assert im.size == (500, 500) self._assert_noerr(im) def test_g4_non_disk_file_object(self): """Testing loading from non-disk non-BytesIO file object""" test_file = "Tests/images/hopper_g4_500.tif" s = io.BytesIO() with open(test_file, "rb") as f: s.write(f.read()) s.seek(0) r = io.BufferedReader(s) with Image.open(r) as im: assert im.size == (500, 500) self._assert_noerr(im) def test_g4_eq_png(self): """ Checking that we're actually getting the data that we expect""" with Image.open("Tests/images/hopper_bw_500.png") as png: with Image.open("Tests/images/hopper_g4_500.tif") as g4: assert_image_equal(g4, png) # see https://github.com/python-pillow/Pillow/issues/279 def test_g4_fillorder_eq_png(self): """ Checking that we're actually getting the data that we expect""" with Image.open("Tests/images/g4-fillorder-test.png") as png: with Image.open("Tests/images/g4-fillorder-test.tif") as g4: assert_image_equal(g4, png) def test_g4_write(self): """Checking to see that the saved image is the same as what we wrote""" test_file = "Tests/images/hopper_g4_500.tif" with Image.open(test_file) as orig: out = self.tempfile("temp.tif") rot = orig.transpose(Image.ROTATE_90) assert rot.size == (500, 500) rot.save(out) with Image.open(out) as reread: assert reread.size == (500, 500) self._assert_noerr(reread) assert_image_equal(reread, rot) assert reread.info["compression"] == "group4" assert reread.info["compression"] == orig.info["compression"] assert orig.tobytes() != reread.tobytes() def test_adobe_deflate_tiff(self): test_file = "Tests/images/tiff_adobe_deflate.tif" with Image.open(test_file) as im: assert im.mode == "RGB" assert im.size == (278, 374) assert im.tile[0][:3] == ("libtiff", (0, 0, 278, 374), 0) im.load() assert_image_equal_tofile(im, "Tests/images/tiff_adobe_deflate.png") def test_write_metadata(self): """ Test metadata writing through libtiff """ for legacy_api in [False, True]: f = self.tempfile("temp.tiff") with Image.open("Tests/images/hopper_g4.tif") as img: img.save(f, tiffinfo=img.tag) if legacy_api: original = img.tag.named() else: original = img.tag_v2.named() # PhotometricInterpretation is set from SAVE_INFO, # not the original image. ignored = [ "StripByteCounts", "RowsPerStrip", "PageNumber", "PhotometricInterpretation", ] with Image.open(f) as loaded: if legacy_api: reloaded = loaded.tag.named() else: reloaded = loaded.tag_v2.named() for tag, value in itertools.chain(reloaded.items(), original.items()): if tag not in ignored: val = original[tag] if tag.endswith("Resolution"): if legacy_api: assert ( c_float(val[0][0] / val[0][1]).value == c_float(value[0][0] / value[0][1]).value ), ("%s didn't roundtrip" % tag) else: assert c_float(val).value == c_float(value).value, ( "%s didn't roundtrip" % tag ) else: assert val == value, "%s didn't roundtrip" % tag # https://github.com/python-pillow/Pillow/issues/1561 requested_fields = ["StripByteCounts", "RowsPerStrip", "StripOffsets"] for field in requested_fields: assert field in reloaded, "%s not in metadata" % field def test_additional_metadata(self): # these should not crash. Seriously dummy data, most of it doesn't make # any sense, so we're running up against limits where we're asking # libtiff to do stupid things. # Get the list of the ones that we should be able to write core_items = { tag: info for tag, info in ((s, TiffTags.lookup(s)) for s in TiffTags.LIBTIFF_CORE) if info.type is not None } # Exclude ones that have special meaning # that we're already testing them with Image.open("Tests/images/hopper_g4.tif") as im: for tag in im.tag_v2: try: del core_items[tag] except KeyError: pass # Type codes: # 2: "ascii", # 3: "short", # 4: "long", # 5: "rational", # 12: "double", # Type: dummy value values = { 2: "test", 3: 1, 4: 2 ** 20, 5: TiffImagePlugin.IFDRational(100, 1), 12: 1.05, } new_ifd = TiffImagePlugin.ImageFileDirectory_v2() for tag, info in core_items.items(): if info.length == 1: new_ifd[tag] = values[info.type] if info.length == 0: new_ifd[tag] = tuple(values[info.type] for _ in range(3)) else: new_ifd[tag] = tuple(values[info.type] for _ in range(info.length)) # Extra samples really doesn't make sense in this application. del new_ifd[338] out = self.tempfile("temp.tif") TiffImagePlugin.WRITE_LIBTIFF = True im.save(out, tiffinfo=new_ifd) TiffImagePlugin.WRITE_LIBTIFF = False def test_custom_metadata(self): tc = namedtuple("test_case", "value,type,supported_by_default") custom = { 37000 + k: v for k, v in enumerate( [ tc(4, TiffTags.SHORT, True), tc(123456789, TiffTags.LONG, True), tc(-4, TiffTags.SIGNED_BYTE, False), tc(-4, TiffTags.SIGNED_SHORT, False), tc(-123456789, TiffTags.SIGNED_LONG, False), tc(TiffImagePlugin.IFDRational(4, 7), TiffTags.RATIONAL, True), tc(4.25, TiffTags.FLOAT, True), tc(4.25, TiffTags.DOUBLE, True), tc("custom tag value", TiffTags.ASCII, True), tc(b"custom tag value", TiffTags.BYTE, True), tc((4, 5, 6), TiffTags.SHORT, True), tc((123456789, 9, 34, 234, 219387, 92432323), TiffTags.LONG, True), tc((-4, 9, 10), TiffTags.SIGNED_BYTE, False), tc((-4, 5, 6), TiffTags.SIGNED_SHORT, False), tc( (-123456789, 9, 34, 234, 219387, -92432323), TiffTags.SIGNED_LONG, False, ), tc((4.25, 5.25), TiffTags.FLOAT, True), tc((4.25, 5.25), TiffTags.DOUBLE, True), # array of TIFF_BYTE requires bytes instead of tuple for backwards # compatibility tc(bytes([4]), TiffTags.BYTE, True), tc(bytes((4, 9, 10)), TiffTags.BYTE, True), ] ) } libtiffs = [False] if Image.core.libtiff_support_custom_tags: libtiffs.append(True) for libtiff in libtiffs: TiffImagePlugin.WRITE_LIBTIFF = libtiff def check_tags(tiffinfo): im = hopper() out = self.tempfile("temp.tif") im.save(out, tiffinfo=tiffinfo) with Image.open(out) as reloaded: for tag, value in tiffinfo.items(): reloaded_value = reloaded.tag_v2[tag] if ( isinstance(reloaded_value, TiffImagePlugin.IFDRational) and libtiff ): # libtiff does not support real RATIONALS assert ( round(abs(float(reloaded_value) - float(value)), 7) == 0 ) continue if libtiff and isinstance(value, bytes): value = value.decode() assert reloaded_value == value # Test with types ifd = TiffImagePlugin.ImageFileDirectory_v2() for tag, tagdata in custom.items(): ifd[tag] = tagdata.value ifd.tagtype[tag] = tagdata.type check_tags(ifd) # Test without types. This only works for some types, int for example are # always encoded as LONG and not SIGNED_LONG. check_tags( { tag: tagdata.value for tag, tagdata in custom.items() if tagdata.supported_by_default } ) TiffImagePlugin.WRITE_LIBTIFF = False def test_int_dpi(self): # issue #1765 im = hopper("RGB") out = self.tempfile("temp.tif") TiffImagePlugin.WRITE_LIBTIFF = True im.save(out, dpi=(72, 72)) TiffImagePlugin.WRITE_LIBTIFF = False with Image.open(out) as reloaded: assert reloaded.info["dpi"] == (72.0, 72.0) def test_g3_compression(self): with Image.open("Tests/images/hopper_g4_500.tif") as i: out = self.tempfile("temp.tif") i.save(out, compression="group3") with Image.open(out) as reread: assert reread.info["compression"] == "group3" assert_image_equal(reread, i) def test_little_endian(self): with Image.open("Tests/images/16bit.deflate.tif") as im: assert im.getpixel((0, 0)) == 480 assert im.mode == "I;16" b = im.tobytes() # Bytes are in image native order (little endian) assert b[0] == ord(b"\xe0") assert b[1] == ord(b"\x01") out = self.tempfile("temp.tif") # out = "temp.le.tif" im.save(out) with Image.open(out) as reread: assert reread.info["compression"] == im.info["compression"] assert reread.getpixel((0, 0)) == 480 # UNDONE - libtiff defaults to writing in native endian, so # on big endian, we'll get back mode = 'I;16B' here. def test_big_endian(self): with Image.open("Tests/images/16bit.MM.deflate.tif") as im: assert im.getpixel((0, 0)) == 480 assert im.mode == "I;16B" b = im.tobytes() # Bytes are in image native order (big endian) assert b[0] == ord(b"\x01") assert b[1] == ord(b"\xe0") out = self.tempfile("temp.tif") im.save(out) with Image.open(out) as reread: assert reread.info["compression"] == im.info["compression"] assert reread.getpixel((0, 0)) == 480 def test_g4_string_info(self): """Tests String data in info directory""" test_file = "Tests/images/hopper_g4_500.tif" with Image.open(test_file) as orig: out = self.tempfile("temp.tif") orig.tag[269] = "temp.tif" orig.save(out) with Image.open(out) as reread: assert "temp.tif" == reread.tag_v2[269] assert "temp.tif" == reread.tag[269][0] def test_12bit_rawmode(self): """ Are we generating the same interpretation of the image as Imagemagick is? """ TiffImagePlugin.READ_LIBTIFF = True with Image.open("Tests/images/12bit.cropped.tif") as im: im.load() TiffImagePlugin.READ_LIBTIFF = False # to make the target -- # convert 12bit.cropped.tif -depth 16 tmp.tif # convert tmp.tif -evaluate RightShift 4 12in16bit2.tif # imagemagick will auto scale so that a 12bit FFF is 16bit FFF0, # so we need to unshift so that the integer values are the same. assert_image_equal_tofile(im, "Tests/images/12in16bit.tif") def test_blur(self): # test case from irc, how to do blur on b/w image # and save to compressed tif. out = self.tempfile("temp.tif") with Image.open("Tests/images/pport_g4.tif") as im: im = im.convert("L") im = im.filter(ImageFilter.GaussianBlur(4)) im.save(out, compression="tiff_adobe_deflate") with Image.open(out) as im2: im2.load() assert_image_equal(im, im2) def test_compressions(self): # Test various tiff compressions and assert similar image content but reduced # file sizes. im = hopper("RGB") out = self.tempfile("temp.tif") im.save(out) size_raw = os.path.getsize(out) for compression in ("packbits", "tiff_lzw"): im.save(out, compression=compression) size_compressed = os.path.getsize(out) with Image.open(out) as im2: assert_image_equal(im, im2) im.save(out, compression="jpeg") size_jpeg = os.path.getsize(out) with Image.open(out) as im2: assert_image_similar(im, im2, 30) im.save(out, compression="jpeg", quality=30) size_jpeg_30 = os.path.getsize(out) with Image.open(out) as im3: assert_image_similar(im2, im3, 30) assert size_raw > size_compressed assert size_compressed > size_jpeg assert size_jpeg > size_jpeg_30 def test_quality(self): im = hopper("RGB") out = self.tempfile("temp.tif") with pytest.raises(ValueError): im.save(out, compression="tiff_lzw", quality=50) with pytest.raises(ValueError): im.save(out, compression="jpeg", quality=-1) with pytest.raises(ValueError): im.save(out, compression="jpeg", quality=101) with pytest.raises(ValueError): im.save(out, compression="jpeg", quality="good") im.save(out, compression="jpeg", quality=0) im.save(out, compression="jpeg", quality=100) def test_cmyk_save(self): im = hopper("CMYK") out = self.tempfile("temp.tif") im.save(out, compression="tiff_adobe_deflate") with Image.open(out) as im2: assert_image_equal(im, im2) def xtest_bw_compression_w_rgb(self): """ This test passes, but when running all tests causes a failure due to output on stderr from the error thrown by libtiff. We need to capture that but not now""" im = hopper("RGB") out = self.tempfile("temp.tif") with pytest.raises(IOError): im.save(out, compression="tiff_ccitt") with pytest.raises(IOError): im.save(out, compression="group3") with pytest.raises(IOError): im.save(out, compression="group4") def test_fp_leak(self): im = Image.open("Tests/images/hopper_g4_500.tif") fn = im.fp.fileno() os.fstat(fn) im.load() # this should close it. with pytest.raises(OSError): os.fstat(fn) im = None # this should force even more closed. with pytest.raises(OSError): os.fstat(fn) with pytest.raises(OSError): os.close(fn) def test_multipage(self): # issue #862 TiffImagePlugin.READ_LIBTIFF = True with Image.open("Tests/images/multipage.tiff") as im: # file is a multipage tiff, 10x10 green, 10x10 red, 20x20 blue im.seek(0) assert im.size == (10, 10) assert im.convert("RGB").getpixel((0, 0)) == (0, 128, 0) assert im.tag.next im.seek(1) assert im.size == (10, 10) assert im.convert("RGB").getpixel((0, 0)) == (255, 0, 0) assert im.tag.next im.seek(2) assert not im.tag.next assert im.size == (20, 20) assert im.convert("RGB").getpixel((0, 0)) == (0, 0, 255) TiffImagePlugin.READ_LIBTIFF = False def test_multipage_nframes(self): # issue #862 TiffImagePlugin.READ_LIBTIFF = True with Image.open("Tests/images/multipage.tiff") as im: frames = im.n_frames assert frames == 3 for _ in range(frames): im.seek(0) # Should not raise ValueError: I/O operation on closed file im.load() TiffImagePlugin.READ_LIBTIFF = False def test__next(self): TiffImagePlugin.READ_LIBTIFF = True with Image.open("Tests/images/hopper.tif") as im: assert not im.tag.next im.load() assert not im.tag.next def test_4bit(self): # Arrange test_file = "Tests/images/hopper_gray_4bpp.tif" original = hopper("L") # Act TiffImagePlugin.READ_LIBTIFF = True with Image.open(test_file) as im: TiffImagePlugin.READ_LIBTIFF = False # Assert assert im.size == (128, 128) assert im.mode == "L" assert_image_similar(im, original, 7.3) def test_gray_semibyte_per_pixel(self): test_files = ( ( 24.8, # epsilon ( # group "Tests/images/tiff_gray_2_4_bpp/hopper2.tif", "Tests/images/tiff_gray_2_4_bpp/hopper2I.tif", "Tests/images/tiff_gray_2_4_bpp/hopper2R.tif", "Tests/images/tiff_gray_2_4_bpp/hopper2IR.tif", ), ), ( 7.3, # epsilon ( # group "Tests/images/tiff_gray_2_4_bpp/hopper4.tif", "Tests/images/tiff_gray_2_4_bpp/hopper4I.tif", "Tests/images/tiff_gray_2_4_bpp/hopper4R.tif", "Tests/images/tiff_gray_2_4_bpp/hopper4IR.tif", ), ), ) original = hopper("L") for epsilon, group in test_files: with Image.open(group[0]) as im: assert im.size == (128, 128) assert im.mode == "L" assert_image_similar(im, original, epsilon) for file in group[1:]: with Image.open(file) as im2: assert im2.size == (128, 128) assert im2.mode == "L" assert_image_equal(im, im2) def test_save_bytesio(self): # PR 1011 # Test TIFF saving to io.BytesIO() object. TiffImagePlugin.WRITE_LIBTIFF = True TiffImagePlugin.READ_LIBTIFF = True # Generate test image pilim = hopper() def save_bytesio(compression=None): buffer_io = io.BytesIO() pilim.save(buffer_io, format="tiff", compression=compression) buffer_io.seek(0) with Image.open(buffer_io) as pilim_load: assert_image_similar(pilim, pilim_load, 0) save_bytesio() save_bytesio("raw") save_bytesio("packbits") save_bytesio("tiff_lzw") TiffImagePlugin.WRITE_LIBTIFF = False TiffImagePlugin.READ_LIBTIFF = False def test_crashing_metadata(self): # issue 1597 with Image.open("Tests/images/rdf.tif") as im: out = self.tempfile("temp.tif") TiffImagePlugin.WRITE_LIBTIFF = True # this shouldn't crash im.save(out, format="TIFF") TiffImagePlugin.WRITE_LIBTIFF = False def test_page_number_x_0(self): # Issue 973 # Test TIFF with tag 297 (Page Number) having value of 0 0. # The first number is the current page number. # The second is the total number of pages, zero means not available. outfile = self.tempfile("temp.tif") # Created by printing a page in Chrome to PDF, then: # /usr/bin/gs -q -sDEVICE=tiffg3 -sOutputFile=total-pages-zero.tif # -dNOPAUSE /tmp/test.pdf -c quit infile = "Tests/images/total-pages-zero.tif" with Image.open(infile) as im: # Should not divide by zero im.save(outfile) def test_fd_duplication(self): # https://github.com/python-pillow/Pillow/issues/1651 tmpfile = self.tempfile("temp.tif") with open(tmpfile, "wb") as f: with open("Tests/images/g4-multi.tiff", "rb") as src: f.write(src.read()) im = Image.open(tmpfile) im.n_frames im.close() # Should not raise PermissionError. os.remove(tmpfile) def test_read_icc(self): with Image.open("Tests/images/hopper.iccprofile.tif") as img: icc = img.info.get("icc_profile") assert icc is not None TiffImagePlugin.READ_LIBTIFF = True with Image.open("Tests/images/hopper.iccprofile.tif") as img: icc_libtiff = img.info.get("icc_profile") assert icc_libtiff is not None TiffImagePlugin.READ_LIBTIFF = False assert icc == icc_libtiff def test_multipage_compression(self): with Image.open("Tests/images/compression.tif") as im: im.seek(0) assert im._compression == "tiff_ccitt" assert im.size == (10, 10) im.seek(1) assert im._compression == "packbits" assert im.size == (10, 10) im.load() im.seek(0) assert im._compression == "tiff_ccitt" assert im.size == (10, 10) im.load() def test_save_tiff_with_jpegtables(self): # Arrange outfile = self.tempfile("temp.tif") # Created with ImageMagick: convert hopper.jpg hopper_jpg.tif # Contains JPEGTables (347) tag infile = "Tests/images/hopper_jpg.tif" with Image.open(infile) as im: # Act / Assert # Should not raise UnicodeDecodeError or anything else im.save(outfile) def test_16bit_RGB_tiff(self): with Image.open("Tests/images/tiff_16bit_RGB.tiff") as im: assert im.mode == "RGB" assert im.size == (100, 40) assert im.tile, [ ( "libtiff", (0, 0, 100, 40), 0, ("RGB;16N", "tiff_adobe_deflate", False, 8), ) ] im.load() assert_image_equal_tofile(im, "Tests/images/tiff_16bit_RGB_target.png") def test_16bit_RGBa_tiff(self): with Image.open("Tests/images/tiff_16bit_RGBa.tiff") as im: assert im.mode == "RGBA" assert im.size == (100, 40) assert im.tile, [ ("libtiff", (0, 0, 100, 40), 0, ("RGBa;16N", "tiff_lzw", False, 38236),) ] im.load() assert_image_equal_tofile(im, "Tests/images/tiff_16bit_RGBa_target.png") @skip_unless_feature("jpg") def test_gimp_tiff(self): # Read TIFF JPEG images from GIMP [@PIL168] filename = "Tests/images/pil168.tif" with Image.open(filename) as im: assert im.mode == "RGB" assert im.size == (256, 256) assert im.tile == [ ("libtiff", (0, 0, 256, 256), 0, ("RGB", "jpeg", False, 5122)) ] im.load() assert_image_equal_tofile(im, "Tests/images/pil168.png") def test_sampleformat(self): # https://github.com/python-pillow/Pillow/issues/1466 with Image.open("Tests/images/copyleft.tiff") as im: assert im.mode == "RGB" assert_image_equal_tofile(im, "Tests/images/copyleft.png", mode="RGB") def test_lzw(self): with Image.open("Tests/images/hopper_lzw.tif") as im: assert im.mode == "RGB" assert im.size == (128, 128) assert im.format == "TIFF" im2 = hopper() assert_image_similar(im, im2, 5) def test_strip_cmyk_jpeg(self): infile = "Tests/images/tiff_strip_cmyk_jpeg.tif" with Image.open(infile) as im: assert_image_similar_tofile(im, "Tests/images/pil_sample_cmyk.jpg", 0.5) def test_strip_cmyk_16l_jpeg(self): infile = "Tests/images/tiff_strip_cmyk_16l_jpeg.tif" with Image.open(infile) as im: assert_image_similar_tofile(im, "Tests/images/pil_sample_cmyk.jpg", 0.5) def test_strip_ycbcr_jpeg_2x2_sampling(self): infile = "Tests/images/tiff_strip_ycbcr_jpeg_2x2_sampling.tif" with Image.open(infile) as im: assert_image_similar_tofile(im, "Tests/images/flower.jpg", 0.5) def test_strip_ycbcr_jpeg_1x1_sampling(self): infile = "Tests/images/tiff_strip_ycbcr_jpeg_1x1_sampling.tif" with Image.open(infile) as im: assert_image_equal_tofile(im, "Tests/images/flower2.jpg") def test_tiled_cmyk_jpeg(self): infile = "Tests/images/tiff_tiled_cmyk_jpeg.tif" with Image.open(infile) as im: assert_image_similar_tofile(im, "Tests/images/pil_sample_cmyk.jpg", 0.5) def test_tiled_ycbcr_jpeg_1x1_sampling(self): infile = "Tests/images/tiff_tiled_ycbcr_jpeg_1x1_sampling.tif" with Image.open(infile) as im: assert_image_equal_tofile(im, "Tests/images/flower2.jpg") def test_tiled_ycbcr_jpeg_2x2_sampling(self): infile = "Tests/images/tiff_tiled_ycbcr_jpeg_2x2_sampling.tif" with Image.open(infile) as im: assert_image_similar_tofile(im, "Tests/images/flower.jpg", 0.5) def test_old_style_jpeg(self): infile = "Tests/images/old-style-jpeg-compression.tif" with Image.open(infile) as im: assert_image_equal_tofile(im, "Tests/images/old-style-jpeg-compression.png") def test_no_rows_per_strip(self): # This image does not have a RowsPerStrip TIFF tag infile = "Tests/images/no_rows_per_strip.tif" with Image.open(infile) as im: im.load() assert im.size == (950, 975) def test_orientation(self): with Image.open("Tests/images/g4_orientation_1.tif") as base_im: for i in range(2, 9): with Image.open("Tests/images/g4_orientation_" + str(i) + ".tif") as im: im.load() assert_image_similar(base_im, im, 0.7) def test_sampleformat_not_corrupted(self): # Assert that a TIFF image with SampleFormat=UINT tag is not corrupted # when saving to a new file. # Pillow 6.0 fails with "OSError: cannot identify image file". tiff = io.BytesIO( base64.b64decode( b"SUkqAAgAAAAPAP4ABAABAAAAAAAAAAABBAABAAAAAQAAAAEBBAABAAAAAQAA" b"AAIBAwADAAAAwgAAAAMBAwABAAAACAAAAAYBAwABAAAAAgAAABEBBAABAAAA" b"4AAAABUBAwABAAAAAwAAABYBBAABAAAAAQAAABcBBAABAAAACwAAABoBBQAB" b"AAAAyAAAABsBBQABAAAA0AAAABwBAwABAAAAAQAAACgBAwABAAAAAQAAAFMB" b"AwADAAAA2AAAAAAAAAAIAAgACAABAAAAAQAAAAEAAAABAAAAAQABAAEAAAB4" b"nGNgYAAAAAMAAQ==" ) ) out = io.BytesIO() with Image.open(tiff) as im: im.save(out, format="tiff") out.seek(0) with Image.open(out) as im: im.load() def test_realloc_overflow(self): TiffImagePlugin.READ_LIBTIFF = True with Image.open("Tests/images/tiff_overflow_rows_per_strip.tif") as im: with pytest.raises(IOError) as e: im.load() # Assert that the error code is IMAGING_CODEC_MEMORY assert str(e.value) == "-9" TiffImagePlugin.READ_LIBTIFF = False