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This commit is contained in:
hugovk 2014-08-27 10:57:40 +03:00
parent d866a29bd8
commit a428321bee
1 changed files with 14 additions and 9 deletions
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15
Tests/test_file_jpeg.py
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@ -60,7 +60,8 @@ class TestFileJpeg(PillowTestCase):
self.assertGreater(y, 0.8) self.assertGreater(y, 0.8)
self.assertEqual(k, 0.0) self.assertEqual(k, 0.0)
# the opposite corner is black # the opposite corner is black
c, m, y, k = [x / 255.0 for x in im.getpixel((im.size[0]-1, im.size[1]-1))] c, m, y, k = [x / 255.0 for x in im.getpixel((
im.size[0]-1, im.size[1]-1))]
self.assertGreater(k, 0.9) self.assertGreater(k, 0.9)
# roundtrip, and check again # roundtrip, and check again
im = self.roundtrip(im) im = self.roundtrip(im)
@ -69,7 +70,8 @@ class TestFileJpeg(PillowTestCase):
self.assertGreater(m, 0.8) self.assertGreater(m, 0.8)
self.assertGreater(y, 0.8) self.assertGreater(y, 0.8)
self.assertEqual(k, 0.0) self.assertEqual(k, 0.0)
c, m, y, k = [x / 255.0 for x in im.getpixel((im.size[0]-1, im.size[1]-1))] c, m, y, k = [x / 255.0 for x in im.getpixel((
im.size[0]-1, im.size[1]-1))]
self.assertGreater(k, 0.9) self.assertGreater(k, 0.9)
def test_dpi(self): def test_dpi(self):
@ -150,7 +152,8 @@ class TestFileJpeg(PillowTestCase):
if py3: if py3:
a = bytes(random.randint(0, 255) for _ in range(256 * 256 * 3)) a = bytes(random.randint(0, 255) for _ in range(256 * 256 * 3))
else: else:
a = b''.join(chr(random.randint(0, 255)) for _ in range(256 * 256 * 3)) a = b''.join(chr(random.randint(0, 255)) for _ in range(
256 * 256 * 3))
im = Image.frombuffer("RGB", (256, 256), a, "raw", "RGB", 0, 1) im = Image.frombuffer("RGB", (256, 256), a, "raw", "RGB", 0, 1)
# this requires more bytes than pixels in the image # this requires more bytes than pixels in the image
im.save(f, format="JPEG", progressive=True, quality=100) im.save(f, format="JPEG", progressive=True, quality=100)
@ -235,8 +238,10 @@ class TestFileJpeg(PillowTestCase):
qtables = im.quantization qtables = im.quantization
reloaded = self.roundtrip(im, qtables=qtables, subsampling=0) reloaded = self.roundtrip(im, qtables=qtables, subsampling=0)
self.assertEqual(im.quantization, reloaded.quantization) self.assertEqual(im.quantization, reloaded.quantization)
self.assert_image_similar(im, self.roundtrip(im, qtables='web_low'), 30) self.assert_image_similar(im, self.roundtrip(im, qtables='web_low'),
self.assert_image_similar(im, self.roundtrip(im, qtables='web_high'), 30) 30)
self.assert_image_similar(im, self.roundtrip(im, qtables='web_high'),
30)
self.assert_image_similar(im, self.roundtrip(im, qtables='keep'), 30) self.assert_image_similar(im, self.roundtrip(im, qtables='keep'), 30)
# values from wizard.txt in jpeg9-a src package. # values from wizard.txt in jpeg9-a src package.