from __future__ import print_function from helper import unittest, PillowTestCase, hopper, py3 from ctypes import c_float import io import logging import itertools import os from PIL import Image, TiffImagePlugin, TiffTags logger = logging.getLogger(__name__) class LibTiffTestCase(PillowTestCase): def setUp(self): codecs = dir(Image.core) if "libtiff_encoder" not in codecs or "libtiff_decoder" not in codecs: self.skipTest("tiff support not available") def _assert_noerr(self, im): """Helper tests that assert basic sanity about the g4 tiff reading""" # 1 bit self.assertEqual(im.mode, "1") # Does the data actually load im.load() im.getdata() try: self.assertEqual(im._compression, 'group4') except: print("No _compression") print(dir(im)) # can we write it back out, in a different form. out = self.tempfile("temp.png") im.save(out) class TestFileLibTiff(LibTiffTestCase): def test_g4_tiff(self): """Test the ordinary file path load path""" test_file = "Tests/images/hopper_g4_500.tif" im = Image.open(test_file) self.assertEqual(im.size, (500, 500)) self._assert_noerr(im) def test_g4_large(self): test_file = "Tests/images/pport_g4.tif" im = Image.open(test_file) 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: im = Image.open(f) self.assertEqual(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) im = Image.open(s) self.assertEqual(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""" png = Image.open('Tests/images/hopper_bw_500.png') g4 = Image.open('Tests/images/hopper_g4_500.tif') self.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""" png = Image.open('Tests/images/g4-fillorder-test.png') g4 = Image.open('Tests/images/g4-fillorder-test.tif') self.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" orig = Image.open(test_file) out = self.tempfile("temp.tif") rot = orig.transpose(Image.ROTATE_90) self.assertEqual(rot.size, (500, 500)) rot.save(out) reread = Image.open(out) self.assertEqual(reread.size, (500, 500)) self._assert_noerr(reread) self.assert_image_equal(reread, rot) self.assertEqual(reread.info['compression'], 'group4') self.assertEqual(reread.info['compression'], orig.info['compression']) self.assertNotEqual(orig.tobytes(), reread.tobytes()) def test_adobe_deflate_tiff(self): test_file = "Tests/images/tiff_adobe_deflate.tif" im = Image.open(test_file) self.assertEqual(im.mode, "RGB") self.assertEqual(im.size, (278, 374)) self.assertEqual( im.tile[0][:3], ('tiff_adobe_deflate', (0, 0, 278, 374), 0)) im.load() def test_write_metadata(self): """ Test metadata writing through libtiff """ for legacy_api in [False, True]: img = Image.open('Tests/images/hopper_g4.tif') f = self.tempfile('temp.tiff') 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'] loaded = Image.open(f) 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: self.assertEqual( c_float(val[0][0] / val[0][1]).value, c_float(value[0][0] / value[0][1]).value, msg="%s didn't roundtrip" % tag) else: self.assertEqual( c_float(val).value, c_float(value).value, msg="%s didn't roundtrip" % tag) else: self.assertEqual( val, value, msg="%s didn't roundtrip" % tag) # https://github.com/python-pillow/Pillow/issues/1561 requested_fields = ['StripByteCounts', 'RowsPerStrip', 'StripOffsets'] for field in requested_fields: self.assertTrue(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 = dict((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 im = Image.open('Tests/images/hopper_g4.tif') for tag in im.tag_v2.keys(): try: del(core_items[tag]) except: 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_g3_compression(self): i = Image.open('Tests/images/hopper_g4_500.tif') out = self.tempfile("temp.tif") i.save(out, compression='group3') reread = Image.open(out) self.assertEqual(reread.info['compression'], 'group3') self.assert_image_equal(reread, i) def test_little_endian(self): im = Image.open('Tests/images/16bit.deflate.tif') self.assertEqual(im.getpixel((0, 0)), 480) self.assertEqual(im.mode, 'I;16') b = im.tobytes() # Bytes are in image native order (little endian) if py3: self.assertEqual(b[0], ord(b'\xe0')) self.assertEqual(b[1], ord(b'\x01')) else: self.assertEqual(b[0], b'\xe0') self.assertEqual(b[1], b'\x01') out = self.tempfile("temp.tif") # out = "temp.le.tif" im.save(out) reread = Image.open(out) self.assertEqual(reread.info['compression'], im.info['compression']) self.assertEqual(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): im = Image.open('Tests/images/16bit.MM.deflate.tif') self.assertEqual(im.getpixel((0, 0)), 480) self.assertEqual(im.mode, 'I;16B') b = im.tobytes() # Bytes are in image native order (big endian) if py3: self.assertEqual(b[0], ord(b'\x01')) self.assertEqual(b[1], ord(b'\xe0')) else: self.assertEqual(b[0], b'\x01') self.assertEqual(b[1], b'\xe0') out = self.tempfile("temp.tif") im.save(out) reread = Image.open(out) self.assertEqual(reread.info['compression'], im.info['compression']) self.assertEqual(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" orig = Image.open(test_file) out = self.tempfile("temp.tif") orig.tag[269] = 'temp.tif' orig.save(out) reread = Image.open(out) self.assertEqual('temp.tif', reread.tag_v2[269]) self.assertEqual('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 im = Image.open('Tests/images/12bit.cropped.tif') 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. im2 = Image.open('Tests/images/12in16bit.tif') logger.debug("%s", [img.getpixel((0, idx)) for img in [im, im2] for idx in range(3)]) self.assert_image_equal(im, im2) def test_blur(self): # test case from irc, how to do blur on b/w image # and save to compressed tif. from PIL import ImageFilter out = self.tempfile('temp.tif') im = Image.open('Tests/images/pport_g4.tif') im = im.convert('L') im = im.filter(ImageFilter.GaussianBlur(4)) im.save(out, compression='tiff_adobe_deflate') im2 = Image.open(out) im2.load() self.assert_image_equal(im, im2) def test_compressions(self): im = hopper('RGB') out = self.tempfile('temp.tif') for compression in ('packbits', 'tiff_lzw'): im.save(out, compression=compression) im2 = Image.open(out) self.assert_image_equal(im, im2) im.save(out, compression='jpeg') im2 = Image.open(out) self.assert_image_similar(im, im2, 30) def test_cmyk_save(self): im = hopper('CMYK') out = self.tempfile('temp.tif') im.save(out, compression='tiff_adobe_deflate') im2 = Image.open(out) self.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') self.assertRaises( IOError, lambda: im.save(out, compression='tiff_ccitt')) self.assertRaises(IOError, lambda: im.save(out, compression='group3')) self.assertRaises(IOError, lambda: 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. self.assertRaises(OSError, lambda: os.fstat(fn)) im = None # this should force even more closed. self.assertRaises(OSError, lambda: os.fstat(fn)) self.assertRaises(OSError, lambda: os.close(fn)) def test_multipage(self): # issue #862 TiffImagePlugin.READ_LIBTIFF = True im = Image.open('Tests/images/multipage.tiff') # file is a multipage tiff, 10x10 green, 10x10 red, 20x20 blue im.seek(0) self.assertEqual(im.size, (10, 10)) self.assertEqual(im.convert('RGB').getpixel((0, 0)), (0, 128, 0)) self.assertTrue(im.tag.next) im.seek(1) self.assertEqual(im.size, (10, 10)) self.assertEqual(im.convert('RGB').getpixel((0, 0)), (255, 0, 0)) self.assertTrue(im.tag.next) im.seek(2) self.assertFalse(im.tag.next) self.assertEqual(im.size, (20, 20)) self.assertEqual(im.convert('RGB').getpixel((0, 0)), (0, 0, 255)) TiffImagePlugin.READ_LIBTIFF = False def test__next(self): TiffImagePlugin.READ_LIBTIFF = True im = Image.open('Tests/images/hopper.tif') self.assertFalse(im.tag.next) im.load() self.assertFalse(im.tag.next) def test_4bit(self): # Arrange test_file = "Tests/images/hopper_gray_4bpp.tif" original = hopper("L") # Act TiffImagePlugin.READ_LIBTIFF = True im = Image.open(test_file) TiffImagePlugin.READ_LIBTIFF = False # Assert self.assertEqual(im.size, (128, 128)) self.assertEqual(im.mode, "L") self.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: im = Image.open(group[0]) self.assertEqual(im.size, (128, 128)) self.assertEqual(im.mode, "L") self.assert_image_similar(im, original, epsilon) for file in group[1:]: im2 = Image.open(file) self.assertEqual(im2.size, (128, 128)) self.assertEqual(im2.mode, "L") self.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) pilim_load = Image.open(buffer_io) self.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 im = Image.open('Tests/images/rdf.tif') out = self.tempfile('temp.tif') TiffImagePlugin.WRITE_LIBTIFF = True # this shouldn't crash im.save(out, format='TIFF') TiffImagePlugin.WRITE_LIBTIFF = False if __name__ == '__main__': unittest.main() # End of file