import datetime import os from io import BytesIO from PIL import Image, ImageMode from .helper import PillowTestCase, hopper try: from PIL import ImageCms from PIL.ImageCms import ImageCmsProfile ImageCms.core.profile_open except ImportError: # Skipped via setUp() pass SRGB = "Tests/icc/sRGB_IEC61966-2-1_black_scaled.icc" HAVE_PROFILE = os.path.exists(SRGB) class TestImageCms(PillowTestCase): def setUp(self): try: from PIL import ImageCms # need to hit getattr to trigger the delayed import error ImageCms.core.profile_open except ImportError as v: self.skipTest(v) def skip_missing(self): if not HAVE_PROFILE: self.skipTest("SRGB profile not available") def test_sanity(self): # basic smoke test. # this mostly follows the cms_test outline. v = ImageCms.versions() # should return four strings self.assertEqual(v[0], "1.0.0 pil") self.assertEqual(list(map(type, v)), [str, str, str, str]) # internal version number self.assertRegex(ImageCms.core.littlecms_version, r"\d+\.\d+$") self.skip_missing() i = ImageCms.profileToProfile(hopper(), SRGB, SRGB) self.assert_image(i, "RGB", (128, 128)) i = hopper() ImageCms.profileToProfile(i, SRGB, SRGB, inPlace=True) self.assert_image(i, "RGB", (128, 128)) t = ImageCms.buildTransform(SRGB, SRGB, "RGB", "RGB") i = ImageCms.applyTransform(hopper(), t) self.assert_image(i, "RGB", (128, 128)) with hopper() as i: t = ImageCms.buildTransform(SRGB, SRGB, "RGB", "RGB") ImageCms.applyTransform(hopper(), t, inPlace=True) self.assert_image(i, "RGB", (128, 128)) p = ImageCms.createProfile("sRGB") o = ImageCms.getOpenProfile(SRGB) t = ImageCms.buildTransformFromOpenProfiles(p, o, "RGB", "RGB") i = ImageCms.applyTransform(hopper(), t) self.assert_image(i, "RGB", (128, 128)) t = ImageCms.buildProofTransform(SRGB, SRGB, SRGB, "RGB", "RGB") self.assertEqual(t.inputMode, "RGB") self.assertEqual(t.outputMode, "RGB") i = ImageCms.applyTransform(hopper(), t) self.assert_image(i, "RGB", (128, 128)) # test PointTransform convenience API hopper().point(t) def test_name(self): self.skip_missing() # get profile information for file self.assertEqual( ImageCms.getProfileName(SRGB).strip(), "IEC 61966-2-1 Default RGB Colour Space - sRGB", ) def test_info(self): self.skip_missing() self.assertEqual( ImageCms.getProfileInfo(SRGB).splitlines(), [ "sRGB IEC61966-2-1 black scaled", "", "Copyright International Color Consortium, 2009", "", ], ) def test_copyright(self): self.skip_missing() self.assertEqual( ImageCms.getProfileCopyright(SRGB).strip(), "Copyright International Color Consortium, 2009", ) def test_manufacturer(self): self.skip_missing() self.assertEqual(ImageCms.getProfileManufacturer(SRGB).strip(), "") def test_model(self): self.skip_missing() self.assertEqual( ImageCms.getProfileModel(SRGB).strip(), "IEC 61966-2-1 Default RGB Colour Space - sRGB", ) def test_description(self): self.skip_missing() self.assertEqual( ImageCms.getProfileDescription(SRGB).strip(), "sRGB IEC61966-2-1 black scaled", ) def test_intent(self): self.skip_missing() self.assertEqual(ImageCms.getDefaultIntent(SRGB), 0) self.assertEqual( ImageCms.isIntentSupported( SRGB, ImageCms.INTENT_ABSOLUTE_COLORIMETRIC, ImageCms.DIRECTION_INPUT ), 1, ) def test_profile_object(self): # same, using profile object p = ImageCms.createProfile("sRGB") # self.assertEqual(ImageCms.getProfileName(p).strip(), # 'sRGB built-in - (lcms internal)') # self.assertEqual(ImageCms.getProfileInfo(p).splitlines(), # ['sRGB built-in', '', 'WhitePoint : D65 (daylight)', '', '']) self.assertEqual(ImageCms.getDefaultIntent(p), 0) self.assertEqual( ImageCms.isIntentSupported( p, ImageCms.INTENT_ABSOLUTE_COLORIMETRIC, ImageCms.DIRECTION_INPUT ), 1, ) def test_extensions(self): # extensions with Image.open("Tests/images/rgb.jpg") as i: p = ImageCms.getOpenProfile(BytesIO(i.info["icc_profile"])) self.assertEqual( ImageCms.getProfileName(p).strip(), "IEC 61966-2.1 Default RGB colour space - sRGB", ) def test_exceptions(self): # Test mode mismatch psRGB = ImageCms.createProfile("sRGB") pLab = ImageCms.createProfile("LAB") t = ImageCms.buildTransform(pLab, psRGB, "LAB", "RGB") self.assertRaises(ValueError, t.apply_in_place, hopper("RGBA")) # the procedural pyCMS API uses PyCMSError for all sorts of errors with hopper() as im: self.assertRaises( ImageCms.PyCMSError, ImageCms.profileToProfile, im, "foo", "bar" ) self.assertRaises( ImageCms.PyCMSError, ImageCms.buildTransform, "foo", "bar", "RGB", "RGB" ) self.assertRaises(ImageCms.PyCMSError, ImageCms.getProfileName, None) self.skip_missing() self.assertRaises( ImageCms.PyCMSError, ImageCms.isIntentSupported, SRGB, None, None ) def test_display_profile(self): # try fetching the profile for the current display device ImageCms.get_display_profile() def test_lab_color_profile(self): ImageCms.createProfile("LAB", 5000) ImageCms.createProfile("LAB", 6500) def test_unsupported_color_space(self): self.assertRaises(ImageCms.PyCMSError, ImageCms.createProfile, "unsupported") def test_invalid_color_temperature(self): self.assertRaises(ImageCms.PyCMSError, ImageCms.createProfile, "LAB", "invalid") def test_simple_lab(self): i = Image.new("RGB", (10, 10), (128, 128, 128)) psRGB = ImageCms.createProfile("sRGB") pLab = ImageCms.createProfile("LAB") t = ImageCms.buildTransform(psRGB, pLab, "RGB", "LAB") i_lab = ImageCms.applyTransform(i, t) self.assertEqual(i_lab.mode, "LAB") k = i_lab.getpixel((0, 0)) # not a linear luminance map. so L != 128: self.assertEqual(k, (137, 128, 128)) l_data = i_lab.getdata(0) a_data = i_lab.getdata(1) b_data = i_lab.getdata(2) self.assertEqual(list(l_data), [137] * 100) self.assertEqual(list(a_data), [128] * 100) self.assertEqual(list(b_data), [128] * 100) def test_lab_color(self): psRGB = ImageCms.createProfile("sRGB") pLab = ImageCms.createProfile("LAB") t = ImageCms.buildTransform(psRGB, pLab, "RGB", "LAB") # Need to add a type mapping for some PIL type to TYPE_Lab_8 in # findLCMSType, and have that mapping work back to a PIL mode # (likely RGB). i = ImageCms.applyTransform(hopper(), t) self.assert_image(i, "LAB", (128, 128)) # i.save('temp.lab.tif') # visually verified vs PS. target = Image.open("Tests/images/hopper.Lab.tif") self.assert_image_similar(i, target, 3.5) def test_lab_srgb(self): psRGB = ImageCms.createProfile("sRGB") pLab = ImageCms.createProfile("LAB") t = ImageCms.buildTransform(pLab, psRGB, "LAB", "RGB") img = Image.open("Tests/images/hopper.Lab.tif") img_srgb = ImageCms.applyTransform(img, t) # img_srgb.save('temp.srgb.tif') # visually verified vs ps. self.assert_image_similar(hopper(), img_srgb, 30) self.assertTrue(img_srgb.info["icc_profile"]) profile = ImageCmsProfile(BytesIO(img_srgb.info["icc_profile"])) self.assertIn("sRGB", ImageCms.getProfileDescription(profile)) def test_lab_roundtrip(self): # check to see if we're at least internally consistent. psRGB = ImageCms.createProfile("sRGB") pLab = ImageCms.createProfile("LAB") t = ImageCms.buildTransform(psRGB, pLab, "RGB", "LAB") t2 = ImageCms.buildTransform(pLab, psRGB, "LAB", "RGB") i = ImageCms.applyTransform(hopper(), t) self.assertEqual(i.info["icc_profile"], ImageCmsProfile(pLab).tobytes()) out = ImageCms.applyTransform(i, t2) self.assert_image_similar(hopper(), out, 2) def test_profile_tobytes(self): with Image.open("Tests/images/rgb.jpg") as i: p = ImageCms.getOpenProfile(BytesIO(i.info["icc_profile"])) p2 = ImageCms.getOpenProfile(BytesIO(p.tobytes())) # not the same bytes as the original icc_profile, # but it does roundtrip self.assertEqual(p.tobytes(), p2.tobytes()) self.assertEqual(ImageCms.getProfileName(p), ImageCms.getProfileName(p2)) self.assertEqual( ImageCms.getProfileDescription(p), ImageCms.getProfileDescription(p2) ) def test_extended_information(self): self.skip_missing() o = ImageCms.getOpenProfile(SRGB) p = o.profile def assert_truncated_tuple_equal(tup1, tup2, digits=10): # Helper function to reduce precision of tuples of floats # recursively and then check equality. power = 10 ** digits def truncate_tuple(tuple_or_float): return tuple( truncate_tuple(val) if isinstance(val, tuple) else int(val * power) / power for val in tuple_or_float ) self.assertEqual(truncate_tuple(tup1), truncate_tuple(tup2)) self.assertEqual(p.attributes, 4294967296) assert_truncated_tuple_equal( p.blue_colorant, ( (0.14306640625, 0.06060791015625, 0.7140960693359375), (0.1558847490315394, 0.06603820639433387, 0.06060791015625), ), ) assert_truncated_tuple_equal( p.blue_primary, ( (0.14306641366715667, 0.06060790921083026, 0.7140960805782015), (0.15588475410450106, 0.06603820408959558, 0.06060790921083026), ), ) assert_truncated_tuple_equal( p.chromatic_adaptation, ( ( (1.04791259765625, 0.0229339599609375, -0.050201416015625), (0.02960205078125, 0.9904632568359375, -0.0170745849609375), (-0.009246826171875, 0.0150604248046875, 0.7517852783203125), ), ( (1.0267159024652783, 0.022470062342089134, 0.0229339599609375), (0.02951378324103937, 0.9875098886387147, 0.9904632568359375), (-0.012205438066465256, 0.01987915407854985, 0.0150604248046875), ), ), ) self.assertIsNone(p.chromaticity) self.assertEqual( p.clut, { 0: (False, False, True), 1: (False, False, True), 2: (False, False, True), 3: (False, False, True), }, ) self.assertIsNone(p.colorant_table) self.assertIsNone(p.colorant_table_out) self.assertIsNone(p.colorimetric_intent) self.assertEqual(p.connection_space, "XYZ ") self.assertEqual(p.copyright, "Copyright International Color Consortium, 2009") self.assertEqual(p.creation_date, datetime.datetime(2009, 2, 27, 21, 36, 31)) self.assertEqual(p.device_class, "mntr") assert_truncated_tuple_equal( p.green_colorant, ( (0.3851470947265625, 0.7168731689453125, 0.097076416015625), (0.32119769927720654, 0.5978443449048152, 0.7168731689453125), ), ) assert_truncated_tuple_equal( p.green_primary, ( (0.3851470888162112, 0.7168731974161346, 0.09707641738998518), (0.32119768793686687, 0.5978443567149709, 0.7168731974161346), ), ) self.assertEqual(p.header_flags, 0) self.assertEqual(p.header_manufacturer, "\x00\x00\x00\x00") self.assertEqual(p.header_model, "\x00\x00\x00\x00") self.assertEqual( p.icc_measurement_condition, { "backing": (0.0, 0.0, 0.0), "flare": 0.0, "geo": "unknown", "observer": 1, "illuminant_type": "D65", }, ) self.assertEqual(p.icc_version, 33554432) self.assertIsNone(p.icc_viewing_condition) self.assertEqual( p.intent_supported, { 0: (True, True, True), 1: (True, True, True), 2: (True, True, True), 3: (True, True, True), }, ) self.assertTrue(p.is_matrix_shaper) self.assertEqual(p.luminance, ((0.0, 80.0, 0.0), (0.0, 1.0, 80.0))) self.assertIsNone(p.manufacturer) assert_truncated_tuple_equal( p.media_black_point, ( (0.012054443359375, 0.0124969482421875, 0.01031494140625), (0.34573304157549234, 0.35842450765864337, 0.0124969482421875), ), ) assert_truncated_tuple_equal( p.media_white_point, ( (0.964202880859375, 1.0, 0.8249053955078125), (0.3457029219802284, 0.3585375327567059, 1.0), ), ) assert_truncated_tuple_equal( (p.media_white_point_temperature,), (5000.722328847392,) ) self.assertEqual(p.model, "IEC 61966-2-1 Default RGB Colour Space - sRGB") self.assertIsNone(p.perceptual_rendering_intent_gamut) self.assertEqual(p.profile_description, "sRGB IEC61966-2-1 black scaled") self.assertEqual(p.profile_id, b")\xf8=\xde\xaf\xf2U\xaexB\xfa\xe4\xca\x839\r") assert_truncated_tuple_equal( p.red_colorant, ( (0.436065673828125, 0.2224884033203125, 0.013916015625), (0.6484536316398539, 0.3308524880306778, 0.2224884033203125), ), ) assert_truncated_tuple_equal( p.red_primary, ( (0.43606566581047446, 0.22248840582960838, 0.013916015621759925), (0.6484536250319214, 0.3308524944738204, 0.22248840582960838), ), ) self.assertEqual(p.rendering_intent, 0) self.assertIsNone(p.saturation_rendering_intent_gamut) self.assertIsNone(p.screening_description) self.assertIsNone(p.target) self.assertEqual(p.technology, "CRT ") self.assertEqual(p.version, 2.0) self.assertEqual( p.viewing_condition, "Reference Viewing Condition in IEC 61966-2-1" ) self.assertEqual(p.xcolor_space, "RGB ") def test_deprecations(self): self.skip_missing() o = ImageCms.getOpenProfile(SRGB) p = o.profile def helper_deprecated(attr, expected): result = self.assert_warning(DeprecationWarning, getattr, p, attr) self.assertEqual(result, expected) # p.color_space helper_deprecated("color_space", "RGB") # p.pcs helper_deprecated("pcs", "XYZ") # p.product_copyright helper_deprecated( "product_copyright", "Copyright International Color Consortium, 2009" ) # p.product_desc helper_deprecated("product_desc", "sRGB IEC61966-2-1 black scaled") # p.product_description helper_deprecated("product_description", "sRGB IEC61966-2-1 black scaled") # p.product_manufacturer helper_deprecated("product_manufacturer", "") # p.product_model helper_deprecated( "product_model", "IEC 61966-2-1 Default RGB Colour Space - sRGB" ) def test_profile_typesafety(self): """ Profile init type safety prepatch, these would segfault, postpatch they should emit a typeerror """ with self.assertRaises(TypeError): ImageCms.ImageCmsProfile(0).tobytes() with self.assertRaises(TypeError): ImageCms.ImageCmsProfile(1).tobytes() def assert_aux_channel_preserved(self, mode, transform_in_place, preserved_channel): def create_test_image(): # set up test image with something interesting in the tested aux channel. # fmt: off nine_grid_deltas = [ # noqa: E131 (-1, -1), (-1, 0), (-1, 1), (0, -1), (0, 0), (0, 1), (1, -1), (1, 0), (1, 1), ] # fmt: on chans = [] bands = ImageMode.getmode(mode).bands for band_ndx in range(len(bands)): channel_type = "L" # 8-bit unorm channel_pattern = hopper(channel_type) # paste pattern with varying offsets to avoid correlation # potentially hiding some bugs (like channels getting mixed). paste_offset = ( int(band_ndx / float(len(bands)) * channel_pattern.size[0]), int(band_ndx / float(len(bands) * 2) * channel_pattern.size[1]), ) channel_data = Image.new(channel_type, channel_pattern.size) for delta in nine_grid_deltas: channel_data.paste( channel_pattern, tuple( paste_offset[c] + delta[c] * channel_pattern.size[c] for c in range(2) ), ) chans.append(channel_data) return Image.merge(mode, chans) source_image = create_test_image() source_image_aux = source_image.getchannel(preserved_channel) # create some transform, it doesn't matter which one source_profile = ImageCms.createProfile("sRGB") destination_profile = ImageCms.createProfile("sRGB") t = ImageCms.buildTransform( source_profile, destination_profile, inMode=mode, outMode=mode ) # apply transform if transform_in_place: ImageCms.applyTransform(source_image, t, inPlace=True) result_image = source_image else: result_image = ImageCms.applyTransform(source_image, t, inPlace=False) result_image_aux = result_image.getchannel(preserved_channel) self.assert_image_equal(source_image_aux, result_image_aux) def test_preserve_auxiliary_channels_rgba(self): self.assert_aux_channel_preserved( mode="RGBA", transform_in_place=False, preserved_channel="A" ) def test_preserve_auxiliary_channels_rgba_in_place(self): self.assert_aux_channel_preserved( mode="RGBA", transform_in_place=True, preserved_channel="A" ) def test_preserve_auxiliary_channels_rgbx(self): self.assert_aux_channel_preserved( mode="RGBX", transform_in_place=False, preserved_channel="X" ) def test_preserve_auxiliary_channels_rgbx_in_place(self): self.assert_aux_channel_preserved( mode="RGBX", transform_in_place=True, preserved_channel="X" ) def test_auxiliary_channels_isolated(self): # test data in aux channels does not affect non-aux channels aux_channel_formats = [ # format, profile, color-only format, source test image ("RGBA", "sRGB", "RGB", hopper("RGBA")), ("RGBX", "sRGB", "RGB", hopper("RGBX")), ("LAB", "LAB", "LAB", Image.open("Tests/images/hopper.Lab.tif")), ] for src_format in aux_channel_formats: for dst_format in aux_channel_formats: for transform_in_place in [True, False]: # inplace only if format doesn't change if transform_in_place and src_format[0] != dst_format[0]: continue # convert with and without AUX data, test colors are equal source_profile = ImageCms.createProfile(src_format[1]) destination_profile = ImageCms.createProfile(dst_format[1]) source_image = src_format[3] test_transform = ImageCms.buildTransform( source_profile, destination_profile, inMode=src_format[0], outMode=dst_format[0], ) # test conversion from aux-ful source if transform_in_place: test_image = source_image.copy() ImageCms.applyTransform( test_image, test_transform, inPlace=True ) else: test_image = ImageCms.applyTransform( source_image, test_transform, inPlace=False ) # reference conversion from aux-less source reference_transform = ImageCms.buildTransform( source_profile, destination_profile, inMode=src_format[2], outMode=dst_format[2], ) reference_image = ImageCms.applyTransform( source_image.convert(src_format[2]), reference_transform ) self.assert_image_equal( test_image.convert(dst_format[2]), reference_image )