def test_with_transparency(self):
with open(get_test_file(__file__, 'black-white-with-transparency.png'), 'rb') as fobj:
img = PNG.decode(fobj)
self.assertEqual(img.get_color(0, 0), Black)
self.assertEqual(img.get_color(1, 0), White)
self.assertEqual(img.get_color(1, 1), Black.get_for_brightness(0.5))
self.assertEqual(img.get_color(0, 1), White.get_for_brightness(0.5))
def test_non_indexed_interlaced(self):
with open(get_test_file(__file__, 'black-white-non-indexed-interlaced-adam7.png'), 'rb') as fobj:
img = PNG.decode(fobj)
self.assertEqual(img.get_color(0, 0), Black)
self.assertEqual(img.get_color(1, 1), Black)
self.assertEqual(img.get_color(0, 1), White)
self.assertEqual(img.get_color(1, 0), White)
def test_save(self):
with open(get_test_file(__file__, 'black-white-with-transparency.png'), 'rb') as fobj:
img = PNG.decode(fobj)
sio = StringIO()
PNG.encode(img, sio)
