75 lines
2.3 KiB
Python
75 lines
2.3 KiB
Python
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#!/usr/bin/python
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import unittest
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import math
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#import logging
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#logging.basicConfig(level = logging.DEBUG)
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from gi.repository import Vips
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# an expanding zip ... if either of the args is a scalar or a one-element list,
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# duplicate it down the other side
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def zip_expand(x, y):
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# handle singleton list case
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if isinstance(x, list) and len(x) == 1:
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x = x[0]
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if isinstance(y, list) and len(y) == 1:
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y = y[0]
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if isinstance(x, list) and isinstance(y, list):
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return list(zip(x, y))
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elif isinstance(x, list):
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return [[i, y] for i in x]
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elif isinstance(y, list):
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return [[x, j] for j in y]
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else:
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return [[x, y]]
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class TestCreate(unittest.TestCase):
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# test a pair of things which can be lists for approx. equality
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def assertAlmostEqualObjects(self, a, b, places = 4, msg = ''):
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#print 'assertAlmostEqualObjects %s = %s' % (a, b)
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for x, y in zip_expand(a, b):
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self.assertAlmostEqual(x, y, places = places, msg = msg)
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def test_black(self):
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im = Vips.Image.black(100, 100)
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self.assertEqual(im.width, 100)
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self.assertEqual(im.height, 100)
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self.assertEqual(im.format, Vips.BandFormat.UCHAR)
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self.assertEqual(im.bands, 1)
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for i in range (0, 100):
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pixel = im.getpoint(i, i)
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self.assertEqual(len(pixel), 1)
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self.assertEqual(pixel[0], 0)
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im = Vips.Image.black(100, 100, bands = 3)
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self.assertEqual(im.width, 100)
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self.assertEqual(im.height, 100)
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self.assertEqual(im.format, Vips.BandFormat.UCHAR)
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self.assertEqual(im.bands, 3)
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for i in range (0, 100):
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pixel = im.getpoint(i, i)
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self.assertEqual(len(pixel), 3)
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self.assertAlmostEqualObjects(pixel, [0, 0, 0])
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def test_buildlut(self):
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M = Vips.Image.new_from_array([[0, 0],
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[255, 100]])
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lut = M.buildlut()
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self.assertEqual(lut.width, 256)
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self.assertEqual(lut.height, 1)
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self.assertEqual(lut.bands, 1)
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p = lut.getpoint(0, 0)
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self.assertEqual(p[0], 0.0)
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p = lut.getpoint(255, 0)
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self.assertEqual(p[0], 100.0)
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p = lut.getpoint(10, 0)
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self.assertEqual(p[0], 100 * 10.0 / 255.0)
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if __name__ == '__main__':
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unittest.main()
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