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76 lines
2.7 KiB
Python
76 lines
2.7 KiB
Python
from helper import unittest, PillowTestCase, fromstring, tostring
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from PIL import Image
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class TestImageDraft(PillowTestCase):
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def setUp(self):
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codecs = dir(Image.core)
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if "jpeg_encoder" not in codecs or "jpeg_decoder" not in codecs:
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self.skipTest("jpeg support not available")
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def draft_roundtrip(self, in_mode, in_size, req_mode, req_size):
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im = Image.new(in_mode, in_size)
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data = tostring(im, 'JPEG')
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im = fromstring(data)
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im.draft(req_mode, req_size)
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return im
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def test_size(self):
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for in_size, req_size, out_size in [
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((435, 361), (2048, 2048), (435, 361)), # bigger
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((435, 361), (435, 361), (435, 361)), # same
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((128, 128), (64, 64), (64, 64)),
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((128, 128), (32, 32), (32, 32)),
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((128, 128), (16, 16), (16, 16)),
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# large requested width
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((435, 361), (218, 128), (435, 361)), # almost 2x
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((435, 361), (217, 128), (218, 181)), # more than 2x
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((435, 361), (109, 64), (218, 181)), # almost 4x
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((435, 361), (108, 64), (109, 91)), # more than 4x
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((435, 361), (55, 32), (109, 91)), # almost 8x
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((435, 361), (54, 32), (55, 46)), # more than 8x
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((435, 361), (27, 16), (55, 46)), # more than 16x
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# and vice versa
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((435, 361), (128, 181), (435, 361)), # almost 2x
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((435, 361), (128, 180), (218, 181)), # more than 2x
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((435, 361), (64, 91), (218, 181)), # almost 4x
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((435, 361), (64, 90), (109, 91)), # more than 4x
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((435, 361), (32, 46), (109, 91)), # almost 8x
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((435, 361), (32, 45), (55, 46)), # more than 8x
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((435, 361), (16, 22), (55, 46)), # more than 16x
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]:
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im = self.draft_roundtrip('L', in_size, None, req_size)
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im.load()
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self.assertEqual(im.size, out_size)
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def test_mode(self):
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for in_mode, req_mode, out_mode in [
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("RGB", "1", "RGB"),
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("RGB", "L", "L"),
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("RGB", "RGB", "RGB"),
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("RGB", "YCbCr", "YCbCr"),
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("L", "1", "L"),
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("L", "L", "L"),
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("L", "RGB", "L"),
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("L", "YCbCr", "L"),
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("CMYK", "1", "CMYK"),
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("CMYK", "L", "CMYK"),
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("CMYK", "RGB", "CMYK"),
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("CMYK", "YCbCr", "CMYK"),
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]:
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im = self.draft_roundtrip(in_mode, (64, 64), req_mode, None)
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im.load()
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self.assertEqual(im.mode, out_mode)
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def test_several_drafts(self):
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im = self.draft_roundtrip('L', (128, 128), None, (64, 64))
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im.draft(None, (64, 64))
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im.load()
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if __name__ == '__main__':
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unittest.main()
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