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d50445ff30
Similar to the recent adoption of Black. isort is a Python utility to sort imports alphabetically and automatically separate into sections. By using isort, contributors can quickly and automatically conform to the projects style without thinking. Just let the tool do it. Uses the configuration recommended by the Black to avoid conflicts of style. Rewrite TestImageQt.test_deprecated to no rely on import order.
128 lines
4.7 KiB
Python
128 lines
4.7 KiB
Python
from PIL import Image
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from .helper import PillowTestCase, hopper
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class TestImageRotate(PillowTestCase):
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def rotate(self, im, mode, angle, center=None, translate=None):
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out = im.rotate(angle, center=center, translate=translate)
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self.assertEqual(out.mode, mode)
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self.assertEqual(out.size, im.size) # default rotate clips output
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out = im.rotate(angle, center=center, translate=translate, expand=1)
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self.assertEqual(out.mode, mode)
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if angle % 180 == 0:
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self.assertEqual(out.size, im.size)
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elif im.size == (0, 0):
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self.assertEqual(out.size, im.size)
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else:
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self.assertNotEqual(out.size, im.size)
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def test_mode(self):
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for mode in ("1", "P", "L", "RGB", "I", "F"):
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im = hopper(mode)
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self.rotate(im, mode, 45)
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def test_angle(self):
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for angle in (0, 90, 180, 270):
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im = Image.open("Tests/images/test-card.png")
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self.rotate(im, im.mode, angle)
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def test_zero(self):
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for angle in (0, 45, 90, 180, 270):
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im = Image.new("RGB", (0, 0))
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self.rotate(im, im.mode, angle)
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def test_resample(self):
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# Target image creation, inspected by eye.
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# >>> im = Image.open('Tests/images/hopper.ppm')
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# >>> im = im.rotate(45, resample=Image.BICUBIC, expand=True)
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# >>> im.save('Tests/images/hopper_45.png')
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target = Image.open("Tests/images/hopper_45.png")
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for (resample, epsilon) in (
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(Image.NEAREST, 10),
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(Image.BILINEAR, 5),
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(Image.BICUBIC, 0),
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):
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im = hopper()
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im = im.rotate(45, resample=resample, expand=True)
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self.assert_image_similar(im, target, epsilon)
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def test_center_0(self):
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im = hopper()
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target = Image.open("Tests/images/hopper_45.png")
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target_origin = target.size[1] / 2
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target = target.crop((0, target_origin, 128, target_origin + 128))
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im = im.rotate(45, center=(0, 0), resample=Image.BICUBIC)
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self.assert_image_similar(im, target, 15)
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def test_center_14(self):
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im = hopper()
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target = Image.open("Tests/images/hopper_45.png")
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target_origin = target.size[1] / 2 - 14
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target = target.crop((6, target_origin, 128 + 6, target_origin + 128))
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im = im.rotate(45, center=(14, 14), resample=Image.BICUBIC)
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self.assert_image_similar(im, target, 10)
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def test_translate(self):
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im = hopper()
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target = Image.open("Tests/images/hopper_45.png")
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target_origin = (target.size[1] / 2 - 64) - 5
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target = target.crop(
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(target_origin, target_origin, target_origin + 128, target_origin + 128)
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)
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im = im.rotate(45, translate=(5, 5), resample=Image.BICUBIC)
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self.assert_image_similar(im, target, 1)
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def test_fastpath_center(self):
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# if the center is -1,-1 and we rotate by 90<=x<=270 the
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# resulting image should be black
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for angle in (90, 180, 270):
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im = hopper().rotate(angle, center=(-1, -1))
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self.assert_image_equal(im, Image.new("RGB", im.size, "black"))
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def test_fastpath_translate(self):
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# if we post-translate by -128
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# resulting image should be black
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for angle in (0, 90, 180, 270):
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im = hopper().rotate(angle, translate=(-128, -128))
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self.assert_image_equal(im, Image.new("RGB", im.size, "black"))
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def test_center(self):
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im = hopper()
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self.rotate(im, im.mode, 45, center=(0, 0))
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self.rotate(im, im.mode, 45, translate=(im.size[0] / 2, 0))
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self.rotate(im, im.mode, 45, center=(0, 0), translate=(im.size[0] / 2, 0))
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def test_rotate_no_fill(self):
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im = Image.new("RGB", (100, 100), "green")
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target = Image.open("Tests/images/rotate_45_no_fill.png")
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im = im.rotate(45)
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self.assert_image_equal(im, target)
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def test_rotate_with_fill(self):
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im = Image.new("RGB", (100, 100), "green")
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target = Image.open("Tests/images/rotate_45_with_fill.png")
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im = im.rotate(45, fillcolor="white")
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self.assert_image_equal(im, target)
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def test_alpha_rotate_no_fill(self):
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# Alpha images are handled differently internally
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im = Image.new("RGBA", (10, 10), "green")
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im = im.rotate(45, expand=1)
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corner = im.getpixel((0, 0))
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self.assertEqual(corner, (0, 0, 0, 0))
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def test_alpha_rotate_with_fill(self):
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# Alpha images are handled differently internally
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im = Image.new("RGBA", (10, 10), "green")
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im = im.rotate(45, expand=1, fillcolor=(255, 0, 0, 255))
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corner = im.getpixel((0, 0))
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self.assertEqual(corner, (255, 0, 0, 255))
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