Pillow/Tests/test_imageops.py

from helper import unittest, PillowTestCase, lena

from PIL import ImageOps


class TestImageOps(PillowTestCase):

    class Deformer:
        def getmesh(self, im):
            x, y = im.size
            return [((0, 0, x, y), (0, 0, x, 0, x, y, y, 0))]

    deformer = Deformer()

    def test_sanity(self):

        ImageOps.autocontrast(lena("L"))
        ImageOps.autocontrast(lena("RGB"))

        ImageOps.autocontrast(lena("L"), cutoff=10)
        ImageOps.autocontrast(lena("L"), ignore=[0, 255])

        ImageOps.colorize(lena("L"), (0, 0, 0), (255, 255, 255))
        ImageOps.colorize(lena("L"), "black", "white")

        ImageOps.crop(lena("L"), 1)
        ImageOps.crop(lena("RGB"), 1)

        ImageOps.deform(lena("L"), self.deformer)
        ImageOps.deform(lena("RGB"), self.deformer)

        ImageOps.equalize(lena("L"))
        ImageOps.equalize(lena("RGB"))

        ImageOps.expand(lena("L"), 1)
        ImageOps.expand(lena("RGB"), 1)
        ImageOps.expand(lena("L"), 2, "blue")
        ImageOps.expand(lena("RGB"), 2, "blue")

        ImageOps.fit(lena("L"), (128, 128))
        ImageOps.fit(lena("RGB"), (128, 128))

        ImageOps.flip(lena("L"))
        ImageOps.flip(lena("RGB"))

        ImageOps.grayscale(lena("L"))
        ImageOps.grayscale(lena("RGB"))

        ImageOps.invert(lena("L"))
        ImageOps.invert(lena("RGB"))

        ImageOps.mirror(lena("L"))
        ImageOps.mirror(lena("RGB"))

        ImageOps.posterize(lena("L"), 4)
        ImageOps.posterize(lena("RGB"), 4)

        ImageOps.solarize(lena("L"))
        ImageOps.solarize(lena("RGB"))

    def test_1pxfit(self):
        # Division by zero in equalize if image is 1 pixel high
        newimg = ImageOps.fit(lena("RGB").resize((1, 1)), (35, 35))
        self.assertEqual(newimg.size, (35, 35))

        newimg = ImageOps.fit(lena("RGB").resize((1, 100)), (35, 35))
        self.assertEqual(newimg.size, (35, 35))

        newimg = ImageOps.fit(lena("RGB").resize((100, 1)), (35, 35))
        self.assertEqual(newimg.size, (35, 35))

    def test_pil163(self):
        # Division by zero in equalize if < 255 pixels in image (@PIL163)

        i = lena("RGB").resize((15, 16))

        ImageOps.equalize(i.convert("L"))
        ImageOps.equalize(i.convert("P"))
        ImageOps.equalize(i.convert("RGB"))


if __name__ == '__main__':
    unittest.main()

# End of file