mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-09-21 03:18:57 +03:00
76 lines
2.7 KiB
Python
76 lines
2.7 KiB
Python
from helper import unittest, PillowTestCase, fromstring, tostring
|
|
|
|
from PIL import Image
|
|
|
|
|
|
class TestImageDraft(PillowTestCase):
|
|
def setUp(self):
|
|
codecs = dir(Image.core)
|
|
if "jpeg_encoder" not in codecs or "jpeg_decoder" not in codecs:
|
|
self.skipTest("jpeg support not available")
|
|
|
|
def draft_roundtrip(self, in_mode, in_size, req_mode, req_size):
|
|
im = Image.new(in_mode, in_size)
|
|
data = tostring(im, 'JPEG')
|
|
im = fromstring(data)
|
|
im.draft(req_mode, req_size)
|
|
return im
|
|
|
|
def test_size(self):
|
|
for in_size, req_size, out_size in [
|
|
((435, 361), (2048, 2048), (435, 361)), # bigger
|
|
((435, 361), (435, 361), (435, 361)), # same
|
|
((128, 128), (64, 64), (64, 64)),
|
|
((128, 128), (32, 32), (32, 32)),
|
|
((128, 128), (16, 16), (16, 16)),
|
|
|
|
# large requested width
|
|
((435, 361), (218, 128), (435, 361)), # almost 2x
|
|
((435, 361), (217, 128), (218, 181)), # more than 2x
|
|
((435, 361), (109, 64), (218, 181)), # almost 4x
|
|
((435, 361), (108, 64), (109, 91)), # more than 4x
|
|
((435, 361), (55, 32), (109, 91)), # almost 8x
|
|
((435, 361), (54, 32), (55, 46)), # more than 8x
|
|
((435, 361), (27, 16), (55, 46)), # more than 16x
|
|
|
|
# and vice versa
|
|
((435, 361), (128, 181), (435, 361)), # almost 2x
|
|
((435, 361), (128, 180), (218, 181)), # more than 2x
|
|
((435, 361), (64, 91), (218, 181)), # almost 4x
|
|
((435, 361), (64, 90), (109, 91)), # more than 4x
|
|
((435, 361), (32, 46), (109, 91)), # almost 8x
|
|
((435, 361), (32, 45), (55, 46)), # more than 8x
|
|
((435, 361), (16, 22), (55, 46)), # more than 16x
|
|
]:
|
|
im = self.draft_roundtrip('L', in_size, None, req_size)
|
|
im.load()
|
|
self.assertEqual(im.size, out_size)
|
|
|
|
def test_mode(self):
|
|
for in_mode, req_mode, out_mode in [
|
|
("RGB", "1", "RGB"),
|
|
("RGB", "L", "L"),
|
|
("RGB", "RGB", "RGB"),
|
|
("RGB", "YCbCr", "YCbCr"),
|
|
("L", "1", "L"),
|
|
("L", "L", "L"),
|
|
("L", "RGB", "L"),
|
|
("L", "YCbCr", "L"),
|
|
("CMYK", "1", "CMYK"),
|
|
("CMYK", "L", "CMYK"),
|
|
("CMYK", "RGB", "CMYK"),
|
|
("CMYK", "YCbCr", "CMYK"),
|
|
]:
|
|
im = self.draft_roundtrip(in_mode, (64, 64), req_mode, None)
|
|
im.load()
|
|
self.assertEqual(im.mode, out_mode)
|
|
|
|
def test_several_drafts(self):
|
|
im = self.draft_roundtrip('L', (128, 128), None, (64, 64))
|
|
im.draft(None, (64, 64))
|
|
im.load()
|
|
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|