mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-09-21 11:28:58 +03:00
105 lines
3.8 KiB
Python
105 lines
3.8 KiB
Python
from helper import unittest, PillowTestCase, hopper
|
|
from PIL import Image
|
|
|
|
|
|
class TestImageRotate(PillowTestCase):
|
|
|
|
def rotate(self, im, mode, angle, center=None, translate=None):
|
|
out = im.rotate(angle, center=center, translate=translate)
|
|
self.assertEqual(out.mode, mode)
|
|
self.assertEqual(out.size, im.size) # default rotate clips output
|
|
out = im.rotate(angle, center=center, translate=translate, expand=1)
|
|
self.assertEqual(out.mode, mode)
|
|
if angle % 180 == 0:
|
|
self.assertEqual(out.size, im.size)
|
|
elif im.size == (0, 0):
|
|
self.assertEqual(out.size, im.size)
|
|
else:
|
|
self.assertNotEqual(out.size, im.size)
|
|
|
|
def test_mode(self):
|
|
for mode in ("1", "P", "L", "RGB", "I", "F"):
|
|
im = hopper(mode)
|
|
self.rotate(im, mode, 45)
|
|
|
|
def test_angle(self):
|
|
for angle in (0, 90, 180, 270):
|
|
im = Image.open('Tests/images/test-card.png')
|
|
self.rotate(im, im.mode, angle)
|
|
|
|
def test_zero(self):
|
|
for angle in (0, 45, 90, 180, 270):
|
|
im = Image.new('RGB',(0,0))
|
|
self.rotate(im, im.mode, angle)
|
|
|
|
def test_resample(self):
|
|
# Target image creation, inspected by eye.
|
|
# >>> im = Image.open('Tests/images/hopper.ppm')
|
|
# >>> im = im.rotate(45, resample=Image.BICUBIC, expand=True)
|
|
# >>> im.save('Tests/images/hopper_45.png')
|
|
|
|
target = Image.open('Tests/images/hopper_45.png')
|
|
for (resample, epsilon) in ((Image.NEAREST, 10),
|
|
(Image.BILINEAR, 5),
|
|
(Image.BICUBIC, 0)):
|
|
im = hopper()
|
|
im = im.rotate(45, resample=resample, expand=True)
|
|
self.assert_image_similar(im, target, epsilon)
|
|
|
|
def test_center_0(self):
|
|
im = hopper()
|
|
target = Image.open('Tests/images/hopper_45.png')
|
|
target_origin = target.size[1]/2
|
|
target = target.crop((0, target_origin, 128, target_origin + 128))
|
|
|
|
im = im.rotate(45, center=(0,0), resample=Image.BICUBIC)
|
|
|
|
self.assert_image_similar(im, target, 15)
|
|
|
|
def test_center_14(self):
|
|
im = hopper()
|
|
target = Image.open('Tests/images/hopper_45.png')
|
|
target_origin = target.size[1] / 2 - 14
|
|
target = target.crop((6, target_origin, 128 + 6, target_origin + 128))
|
|
|
|
im = im.rotate(45, center=(14,14), resample=Image.BICUBIC)
|
|
|
|
self.assert_image_similar(im, target, 10)
|
|
|
|
def test_translate(self):
|
|
im = hopper()
|
|
target = Image.open('Tests/images/hopper_45.png')
|
|
target_origin = (target.size[1] / 2 - 64) - 5
|
|
target = target.crop((target_origin, target_origin,
|
|
target_origin + 128, target_origin + 128))
|
|
|
|
im = im.rotate(45, translate=(5,5), resample=Image.BICUBIC)
|
|
|
|
self.assert_image_similar(im, target, 1)
|
|
|
|
def test_fastpath_center(self):
|
|
# if the center is -1,-1 and we rotate by 90<=x<=270 the
|
|
# resulting image should be black
|
|
for angle in (90, 180, 270):
|
|
im = hopper().rotate(angle, center=(-1,-1))
|
|
self.assert_image_equal(im, Image.new('RGB', im.size, 'black'))
|
|
|
|
def test_fastpath_translate(self):
|
|
# if we post-translate by -128
|
|
# resulting image should be black
|
|
for angle in (0, 90, 180, 270):
|
|
im = hopper().rotate(angle, translate=(-128,-128))
|
|
self.assert_image_equal(im, Image.new('RGB', im.size, 'black'))
|
|
|
|
def test_center(self):
|
|
im = hopper()
|
|
self.rotate(im, im.mode, 45, center=(0, 0))
|
|
self.rotate(im, im.mode, 45, translate=(im.size[0]/2, 0))
|
|
self.rotate(im, im.mode, 45, center=(0, 0), translate=(im.size[0]/2, 0))
|
|
|
|
|
|
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|