Pillow/Tests/test_image_transpose.py

160 lines
5.9 KiB
Python

from PIL.Image import (
FLIP_LEFT_RIGHT,
FLIP_TOP_BOTTOM,
ROTATE_90,
ROTATE_180,
ROTATE_270,
TRANSPOSE,
TRANSVERSE,
)
from . import helper
from .helper import PillowTestCase, assert_image_equal
class TestImageTranspose(PillowTestCase):
hopper = {
mode: helper.hopper(mode).crop((0, 0, 121, 127)).copy()
for mode in ["L", "RGB", "I;16", "I;16L", "I;16B"]
}
def test_flip_left_right(self):
def transpose(mode):
im = self.hopper[mode]
out = im.transpose(FLIP_LEFT_RIGHT)
self.assertEqual(out.mode, mode)
self.assertEqual(out.size, im.size)
x, y = im.size
self.assertEqual(im.getpixel((1, 1)), out.getpixel((x - 2, 1)))
self.assertEqual(im.getpixel((x - 2, 1)), out.getpixel((1, 1)))
self.assertEqual(im.getpixel((1, y - 2)), out.getpixel((x - 2, y - 2)))
self.assertEqual(im.getpixel((x - 2, y - 2)), out.getpixel((1, y - 2)))
for mode in self.hopper:
transpose(mode)
def test_flip_top_bottom(self):
def transpose(mode):
im = self.hopper[mode]
out = im.transpose(FLIP_TOP_BOTTOM)
self.assertEqual(out.mode, mode)
self.assertEqual(out.size, im.size)
x, y = im.size
self.assertEqual(im.getpixel((1, 1)), out.getpixel((1, y - 2)))
self.assertEqual(im.getpixel((x - 2, 1)), out.getpixel((x - 2, y - 2)))
self.assertEqual(im.getpixel((1, y - 2)), out.getpixel((1, 1)))
self.assertEqual(im.getpixel((x - 2, y - 2)), out.getpixel((x - 2, 1)))
for mode in self.hopper:
transpose(mode)
def test_rotate_90(self):
def transpose(mode):
im = self.hopper[mode]
out = im.transpose(ROTATE_90)
self.assertEqual(out.mode, mode)
self.assertEqual(out.size, im.size[::-1])
x, y = im.size
self.assertEqual(im.getpixel((1, 1)), out.getpixel((1, x - 2)))
self.assertEqual(im.getpixel((x - 2, 1)), out.getpixel((1, 1)))
self.assertEqual(im.getpixel((1, y - 2)), out.getpixel((y - 2, x - 2)))
self.assertEqual(im.getpixel((x - 2, y - 2)), out.getpixel((y - 2, 1)))
for mode in self.hopper:
transpose(mode)
def test_rotate_180(self):
def transpose(mode):
im = self.hopper[mode]
out = im.transpose(ROTATE_180)
self.assertEqual(out.mode, mode)
self.assertEqual(out.size, im.size)
x, y = im.size
self.assertEqual(im.getpixel((1, 1)), out.getpixel((x - 2, y - 2)))
self.assertEqual(im.getpixel((x - 2, 1)), out.getpixel((1, y - 2)))
self.assertEqual(im.getpixel((1, y - 2)), out.getpixel((x - 2, 1)))
self.assertEqual(im.getpixel((x - 2, y - 2)), out.getpixel((1, 1)))
for mode in self.hopper:
transpose(mode)
def test_rotate_270(self):
def transpose(mode):
im = self.hopper[mode]
out = im.transpose(ROTATE_270)
self.assertEqual(out.mode, mode)
self.assertEqual(out.size, im.size[::-1])
x, y = im.size
self.assertEqual(im.getpixel((1, 1)), out.getpixel((y - 2, 1)))
self.assertEqual(im.getpixel((x - 2, 1)), out.getpixel((y - 2, x - 2)))
self.assertEqual(im.getpixel((1, y - 2)), out.getpixel((1, 1)))
self.assertEqual(im.getpixel((x - 2, y - 2)), out.getpixel((1, x - 2)))
for mode in self.hopper:
transpose(mode)
def test_transpose(self):
def transpose(mode):
im = self.hopper[mode]
out = im.transpose(TRANSPOSE)
self.assertEqual(out.mode, mode)
self.assertEqual(out.size, im.size[::-1])
x, y = im.size
self.assertEqual(im.getpixel((1, 1)), out.getpixel((1, 1)))
self.assertEqual(im.getpixel((x - 2, 1)), out.getpixel((1, x - 2)))
self.assertEqual(im.getpixel((1, y - 2)), out.getpixel((y - 2, 1)))
self.assertEqual(im.getpixel((x - 2, y - 2)), out.getpixel((y - 2, x - 2)))
for mode in self.hopper:
transpose(mode)
def test_tranverse(self):
def transpose(mode):
im = self.hopper[mode]
out = im.transpose(TRANSVERSE)
self.assertEqual(out.mode, mode)
self.assertEqual(out.size, im.size[::-1])
x, y = im.size
self.assertEqual(im.getpixel((1, 1)), out.getpixel((y - 2, x - 2)))
self.assertEqual(im.getpixel((x - 2, 1)), out.getpixel((y - 2, 1)))
self.assertEqual(im.getpixel((1, y - 2)), out.getpixel((1, x - 2)))
self.assertEqual(im.getpixel((x - 2, y - 2)), out.getpixel((1, 1)))
for mode in self.hopper:
transpose(mode)
def test_roundtrip(self):
for mode in self.hopper:
im = self.hopper[mode]
def transpose(first, second):
return im.transpose(first).transpose(second)
assert_image_equal(im, transpose(FLIP_LEFT_RIGHT, FLIP_LEFT_RIGHT))
assert_image_equal(im, transpose(FLIP_TOP_BOTTOM, FLIP_TOP_BOTTOM))
assert_image_equal(im, transpose(ROTATE_90, ROTATE_270))
assert_image_equal(im, transpose(ROTATE_180, ROTATE_180))
assert_image_equal(
im.transpose(TRANSPOSE), transpose(ROTATE_90, FLIP_TOP_BOTTOM)
)
assert_image_equal(
im.transpose(TRANSPOSE), transpose(ROTATE_270, FLIP_LEFT_RIGHT)
)
assert_image_equal(
im.transpose(TRANSVERSE), transpose(ROTATE_90, FLIP_LEFT_RIGHT)
)
assert_image_equal(
im.transpose(TRANSVERSE), transpose(ROTATE_270, FLIP_TOP_BOTTOM)
)
assert_image_equal(
im.transpose(TRANSVERSE), transpose(ROTATE_180, TRANSPOSE)
)