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test dirty pixels

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This commit is contained in:
homm 2016-05-09 22:06:34 +02:00
parent 05d1022e99
commit 8947485e71
1 changed files with 20 additions and 0 deletions
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Tests/test_image_resample.py
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@ -202,6 +202,26 @@ class CoreResampleAlphaCorrectTest(PillowTestCase):
'All colors should present in resized image. '
'Only {0} on {1} line.'.format(len(used_colors), y))
def test_dirty_pixels(self):
i = Image.new('RGBA', (64, 64), (0, 0, 255, 0))
px = i.load()
for y in range(i.size[1] // 4, i.size[1] // 4 * 3):
for x in range(i.size[0] // 4, i.size[0] // 4 * 3):
px[x, y] = (255, 255, 0, 128)
for im in [
i.resize((20, 20), Image.BILINEAR),
i.resize((20, 20), Image.BICUBIC),
i.resize((20, 20), Image.LANCZOS),
]:
px = im.load()
for y in range(im.size[1]):
for x in range(im.size[0]):
if px[x, y][3] != 0:
if px[x, y][:3] != (255, 256, 0):
self.assertEqual(px[x, y][:3], (255, 255, 0))
if __name__ == '__main__':
unittest.main()