mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-12-26 09:56:17 +03:00
40 lines
1.3 KiB
Python
40 lines
1.3 KiB
Python
from .helper import PillowTestCase, hopper
|
|
|
|
|
|
class TestImagePoint(PillowTestCase):
|
|
def test_sanity(self):
|
|
im = hopper()
|
|
|
|
self.assertRaises(ValueError, im.point, list(range(256)))
|
|
im.point(list(range(256)) * 3)
|
|
im.point(lambda x: x)
|
|
|
|
im = im.convert("I")
|
|
self.assertRaises(ValueError, im.point, list(range(256)))
|
|
im.point(lambda x: x * 1)
|
|
im.point(lambda x: x + 1)
|
|
im.point(lambda x: x * 1 + 1)
|
|
self.assertRaises(TypeError, im.point, lambda x: x - 1)
|
|
self.assertRaises(TypeError, im.point, lambda x: x / 1)
|
|
|
|
def test_16bit_lut(self):
|
|
""" Tests for 16 bit -> 8 bit lut for converting I->L images
|
|
see https://github.com/python-pillow/Pillow/issues/440
|
|
"""
|
|
im = hopper("I")
|
|
im.point(list(range(256)) * 256, "L")
|
|
|
|
def test_f_lut(self):
|
|
""" Tests for floating point lut of 8bit gray image """
|
|
im = hopper("L")
|
|
lut = [0.5 * float(x) for x in range(256)]
|
|
|
|
out = im.point(lut, "F")
|
|
|
|
int_lut = [x // 2 for x in range(256)]
|
|
self.assert_image_equal(out.convert("L"), im.point(int_lut, "L"))
|
|
|
|
def test_f_mode(self):
|
|
im = hopper("F")
|
|
self.assertRaises(ValueError, im.point, None)
|