mirror of
https://github.com/python-pillow/Pillow.git
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259 lines
8.7 KiB
Python
259 lines
8.7 KiB
Python
from helper import unittest, PillowTestCase, hopper, lena
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from PIL import Image
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from io import BytesIO
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import os
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try:
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from PIL import ImageCms
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from PIL.ImageCms import ImageCmsProfile
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ImageCms.core.profile_open
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except ImportError as v:
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# Skipped via setUp()
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pass
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SRGB = "Tests/icc/sRGB_IEC61966-2-1_black_scaled.icc"
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HAVE_PROFILE = os.path.exists(SRGB)
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class TestImageCms(PillowTestCase):
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def setUp(self):
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try:
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from PIL import ImageCms
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# need to hit getattr to trigger the delayed import error
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ImageCms.core.profile_open
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except ImportError as v:
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self.skipTest(v)
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def skip_missing(self):
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if not HAVE_PROFILE:
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self.skipTest("SRGB profile not available")
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def test_sanity(self):
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# basic smoke test.
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# this mostly follows the cms_test outline.
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v = ImageCms.versions() # should return four strings
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self.assertEqual(v[0], '1.0.0 pil')
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self.assertEqual(list(map(type, v)), [str, str, str, str])
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# internal version number
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self.assertRegexpMatches(ImageCms.core.littlecms_version, "\d+\.\d+$")
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self.skip_missing()
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i = ImageCms.profileToProfile(hopper(), SRGB, SRGB)
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self.assert_image(i, "RGB", (128, 128))
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i = hopper()
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ImageCms.profileToProfile(i, SRGB, SRGB, inPlace=True)
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self.assert_image(i, "RGB", (128, 128))
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t = ImageCms.buildTransform(SRGB, SRGB, "RGB", "RGB")
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i = ImageCms.applyTransform(hopper(), t)
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self.assert_image(i, "RGB", (128, 128))
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i = hopper()
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t = ImageCms.buildTransform(SRGB, SRGB, "RGB", "RGB")
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ImageCms.applyTransform(hopper(), t, inPlace=True)
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self.assert_image(i, "RGB", (128, 128))
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p = ImageCms.createProfile("sRGB")
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o = ImageCms.getOpenProfile(SRGB)
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t = ImageCms.buildTransformFromOpenProfiles(p, o, "RGB", "RGB")
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i = ImageCms.applyTransform(hopper(), t)
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self.assert_image(i, "RGB", (128, 128))
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t = ImageCms.buildProofTransform(SRGB, SRGB, SRGB, "RGB", "RGB")
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self.assertEqual(t.inputMode, "RGB")
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self.assertEqual(t.outputMode, "RGB")
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i = ImageCms.applyTransform(hopper(), t)
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self.assert_image(i, "RGB", (128, 128))
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# test PointTransform convenience API
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hopper().point(t)
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def test_name(self):
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self.skip_missing()
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# get profile information for file
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self.assertEqual(
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ImageCms.getProfileName(SRGB).strip(),
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'IEC 61966-2-1 Default RGB Colour Space - sRGB')
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def test_info(self):
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self.skip_missing()
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self.assertEqual(
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ImageCms.getProfileInfo(SRGB).splitlines(), [
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'sRGB IEC61966-2-1 black scaled', '',
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'Copyright International Color Consortium, 2009', ''])
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def test_copyright(self):
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self.skip_missing()
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self.assertEqual(
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ImageCms.getProfileCopyright(SRGB).strip(),
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'Copyright International Color Consortium, 2009')
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def test_manufacturer(self):
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self.skip_missing()
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self.assertEqual(
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ImageCms.getProfileManufacturer(SRGB).strip(),
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'')
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def test_model(self):
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self.skip_missing()
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self.assertEqual(
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ImageCms.getProfileModel(SRGB).strip(),
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'IEC 61966-2-1 Default RGB Colour Space - sRGB')
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def test_description(self):
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self.skip_missing()
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self.assertEqual(
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ImageCms.getProfileDescription(SRGB).strip(),
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'sRGB IEC61966-2-1 black scaled')
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def test_intent(self):
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self.skip_missing()
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self.assertEqual(ImageCms.getDefaultIntent(SRGB), 0)
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self.assertEqual(ImageCms.isIntentSupported(
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SRGB, ImageCms.INTENT_ABSOLUTE_COLORIMETRIC,
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ImageCms.DIRECTION_INPUT), 1)
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def test_profile_object(self):
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# same, using profile object
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p = ImageCms.createProfile("sRGB")
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# self.assertEqual(ImageCms.getProfileName(p).strip(),
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# 'sRGB built-in - (lcms internal)')
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# self.assertEqual(ImageCms.getProfileInfo(p).splitlines(),
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# ['sRGB built-in', '', 'WhitePoint : D65 (daylight)', '', ''])
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self.assertEqual(ImageCms.getDefaultIntent(p), 0)
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self.assertEqual(ImageCms.isIntentSupported(
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p, ImageCms.INTENT_ABSOLUTE_COLORIMETRIC,
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ImageCms.DIRECTION_INPUT), 1)
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def test_extensions(self):
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# extensions
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i = Image.open("Tests/images/rgb.jpg")
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p = ImageCms.getOpenProfile(BytesIO(i.info["icc_profile"]))
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self.assertEqual(
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ImageCms.getProfileName(p).strip(),
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'IEC 61966-2.1 Default RGB colour space - sRGB')
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def test_exceptions(self):
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# the procedural pyCMS API uses PyCMSError for all sorts of errors
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self.assertRaises(
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ImageCms.PyCMSError,
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lambda: ImageCms.profileToProfile(hopper(), "foo", "bar"))
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self.assertRaises(
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ImageCms.PyCMSError,
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lambda: ImageCms.buildTransform("foo", "bar", "RGB", "RGB"))
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self.assertRaises(
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ImageCms.PyCMSError,
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lambda: ImageCms.getProfileName(None))
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self.skip_missing()
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self.assertRaises(
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ImageCms.PyCMSError,
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lambda: ImageCms.isIntentSupported(SRGB, None, None))
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def test_display_profile(self):
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# try fetching the profile for the current display device
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ImageCms.get_display_profile()
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def test_lab_color_profile(self):
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ImageCms.createProfile("LAB", 5000)
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ImageCms.createProfile("LAB", 6500)
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def test_simple_lab(self):
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i = Image.new('RGB', (10, 10), (128, 128, 128))
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psRGB = ImageCms.createProfile("sRGB")
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pLab = ImageCms.createProfile("LAB")
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t = ImageCms.buildTransform(psRGB, pLab, "RGB", "LAB")
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i_lab = ImageCms.applyTransform(i, t)
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self.assertEqual(i_lab.mode, 'LAB')
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k = i_lab.getpixel((0, 0))
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# not a linear luminance map. so L != 128:
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self.assertEqual(k, (137, 128, 128))
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L = i_lab.getdata(0)
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a = i_lab.getdata(1)
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b = i_lab.getdata(2)
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self.assertEqual(list(L), [137] * 100)
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self.assertEqual(list(a), [128] * 100)
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self.assertEqual(list(b), [128] * 100)
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def test_lab_color(self):
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psRGB = ImageCms.createProfile("sRGB")
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pLab = ImageCms.createProfile("LAB")
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t = ImageCms.buildTransform(psRGB, pLab, "RGB", "LAB")
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# Need to add a type mapping for some PIL type to TYPE_Lab_8 in
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# findLCMSType, and have that mapping work back to a PIL mode
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# (likely RGB).
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i = ImageCms.applyTransform(lena(), t)
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self.assert_image(i, "LAB", (128, 128))
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# i.save('temp.lab.tif') # visually verified vs PS.
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target = Image.open('Tests/images/lena.Lab.tif')
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self.assert_image_similar(i, target, 30)
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def test_lab_srgb(self):
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psRGB = ImageCms.createProfile("sRGB")
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pLab = ImageCms.createProfile("LAB")
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t = ImageCms.buildTransform(pLab, psRGB, "LAB", "RGB")
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img = Image.open('Tests/images/lena.Lab.tif')
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img_srgb = ImageCms.applyTransform(img, t)
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# img_srgb.save('temp.srgb.tif') # visually verified vs ps.
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self.assert_image_similar(lena(), img_srgb, 30)
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self.assertTrue(img_srgb.info['icc_profile'])
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profile = ImageCmsProfile(BytesIO(img_srgb.info['icc_profile']))
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self.assertTrue('sRGB' in ImageCms.getProfileDescription(profile))
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def test_lab_roundtrip(self):
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# check to see if we're at least internally consistent.
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psRGB = ImageCms.createProfile("sRGB")
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pLab = ImageCms.createProfile("LAB")
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t = ImageCms.buildTransform(psRGB, pLab, "RGB", "LAB")
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t2 = ImageCms.buildTransform(pLab, psRGB, "LAB", "RGB")
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i = ImageCms.applyTransform(hopper(), t)
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self.assertEqual(i.info['icc_profile'],
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ImageCmsProfile(pLab).tobytes())
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out = ImageCms.applyTransform(i, t2)
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self.assert_image_similar(hopper(), out, 2)
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def test_profile_tobytes(self):
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from io import BytesIO
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i = Image.open("Tests/images/rgb.jpg")
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p = ImageCms.getOpenProfile(BytesIO(i.info["icc_profile"]))
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p2 = ImageCms.getOpenProfile(BytesIO(p.tobytes()))
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# not the same bytes as the original icc_profile,
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# but it does roundtrip
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self.assertEqual(p.tobytes(), p2.tobytes())
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self.assertEqual(ImageCms.getProfileName(p),
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ImageCms.getProfileName(p2))
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self.assertEqual(ImageCms.getProfileDescription(p),
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ImageCms.getProfileDescription(p2))
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if __name__ == '__main__':
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unittest.main()
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# End of file
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