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160 lines
5.1 KiB
Python
160 lines
5.1 KiB
Python
from tester import *
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from PIL import Image
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try:
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from PIL import ImageCms
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except ImportError:
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skip()
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SRGB = "Tests/icc/sRGB.icm"
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def test_sanity():
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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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assert_equal(v[0], '1.0.0 pil')
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assert_equal(list(map(type, v)), [str, str, str, str])
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# internal version number
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assert_match(ImageCms.core.littlecms_version, "\d+\.\d+$")
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i = ImageCms.profileToProfile(lena(), SRGB, SRGB)
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assert_image(i, "RGB", (128, 128))
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t = ImageCms.buildTransform(SRGB, SRGB, "RGB", "RGB")
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i = ImageCms.applyTransform(lena(), t)
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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(lena(), t)
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assert_image(i, "RGB", (128, 128))
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t = ImageCms.buildProofTransform(SRGB, SRGB, SRGB, "RGB", "RGB")
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assert_equal(t.inputMode, "RGB")
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assert_equal(t.outputMode, "RGB")
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i = ImageCms.applyTransform(lena(), t)
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assert_image(i, "RGB", (128, 128))
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# test PointTransform convenience API
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im = lena().point(t)
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def test_name():
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# get profile information for file
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assert_equal(ImageCms.getProfileName(SRGB).strip(),
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'IEC 61966-2.1 Default RGB colour space - sRGB')
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def x_test_info():
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assert_equal(ImageCms.getProfileInfo(SRGB).splitlines(),
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['sRGB IEC61966-2.1', '',
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'Copyright (c) 1998 Hewlett-Packard Company', '',
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'WhitePoint : D65 (daylight)', '',
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'Tests/icc/sRGB.icm'])
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def test_intent():
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assert_equal(ImageCms.getDefaultIntent(SRGB), 0)
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assert_equal(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():
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# same, using profile object
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p = ImageCms.createProfile("sRGB")
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# assert_equal(ImageCms.getProfileName(p).strip(),
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# 'sRGB built-in - (lcms internal)')
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# assert_equal(ImageCms.getProfileInfo(p).splitlines(),
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# ['sRGB built-in', '', 'WhitePoint : D65 (daylight)', '', ''])
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assert_equal(ImageCms.getDefaultIntent(p), 0)
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assert_equal(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():
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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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assert_equal(ImageCms.getProfileName(p).strip(),
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'IEC 61966-2.1 Default RGB colour space - sRGB')
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def test_exceptions():
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# the procedural pyCMS API uses PyCMSError for all sorts of errors
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assert_exception(ImageCms.PyCMSError, lambda: ImageCms.profileToProfile(lena(), "foo", "bar"))
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assert_exception(ImageCms.PyCMSError, lambda: ImageCms.buildTransform("foo", "bar", "RGB", "RGB"))
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assert_exception(ImageCms.PyCMSError, lambda: ImageCms.getProfileName(None))
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assert_exception(ImageCms.PyCMSError, lambda: ImageCms.isIntentSupported(SRGB, None, None))
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def test_display_profile():
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# try fetching the profile for the current display device
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assert_no_exception(lambda: ImageCms.get_display_profile())
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def test_lab_color_profile():
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pLab = ImageCms.createProfile("LAB", 5000)
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pLab = ImageCms.createProfile("LAB", 6500)
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def test_simple_lab():
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i = Image.new('RGB', (10,10), (128,128,128))
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pLab = ImageCms.createProfile("LAB")
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t = ImageCms.buildTransform(SRGB, pLab, "RGB", "LAB")
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i_lab = ImageCms.applyTransform(i, t)
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assert_equal(i_lab.mode, 'LAB')
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k = i_lab.getpixel((0,0))
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assert_equal(k, (137,128,128)) # not a linear luminance map. so L != 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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assert_equal(list(L), [137]*100)
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assert_equal(list(a), [128]*100)
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assert_equal(list(b), [128]*100)
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def test_lab_color():
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pLab = ImageCms.createProfile("LAB")
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t = ImageCms.buildTransform(SRGB, pLab, "RGB", "LAB")
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# need to add a type mapping for some PIL type to TYPE_Lab_8 in findLCMSType,
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# and have that mapping work back to a PIL mode. (likely RGB)
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i = ImageCms.applyTransform(lena(), t)
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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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assert_image_similar(i, target, 30)
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def test_lab_srgb():
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pLab = ImageCms.createProfile("LAB")
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t = ImageCms.buildTransform(pLab, SRGB, "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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assert_image_similar(lena(), img_srgb, 30)
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def test_lab_roundtrip():
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# check to see if we're at least internally consistent.
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pLab = ImageCms.createProfile("LAB")
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t = ImageCms.buildTransform(SRGB, pLab, "RGB", "LAB")
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t2 = ImageCms.buildTransform(pLab, SRGB, "LAB", "RGB")
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i = ImageCms.applyTransform(lena(), t)
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out = ImageCms.applyTransform(i, t2)
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assert_image_similar(lena(), out, 2)
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