78 lines
2.5 KiB
Python
Executable File
78 lines
2.5 KiB
Python
Executable File
#!/usr/bin/python
|
|
|
|
import unittest
|
|
import math
|
|
|
|
#import logging
|
|
#logging.basicConfig(level = logging.DEBUG)
|
|
|
|
from gi.repository import Vips
|
|
|
|
Vips.leak_set(True)
|
|
|
|
# an expanding zip ... if either of the args is a scalar or a one-element list,
|
|
# duplicate it down the other side
|
|
def zip_expand(x, y):
|
|
# handle singleton list case
|
|
if isinstance(x, list) and len(x) == 1:
|
|
x = x[0]
|
|
if isinstance(y, list) and len(y) == 1:
|
|
y = y[0]
|
|
|
|
if isinstance(x, list) and isinstance(y, list):
|
|
return list(zip(x, y))
|
|
elif isinstance(x, list):
|
|
return [[i, y] for i in x]
|
|
elif isinstance(y, list):
|
|
return [[x, j] for j in y]
|
|
else:
|
|
return [[x, y]]
|
|
|
|
class TestResample(unittest.TestCase):
|
|
# test a pair of things which can be lists for approx. equality
|
|
def assertAlmostEqualObjects(self, a, b, places = 4, msg = ''):
|
|
# print 'assertAlmostEqualObjects %s = %s' % (a, b)
|
|
for x, y in zip_expand(a, b):
|
|
self.assertAlmostEqual(x, y, places = places, msg = msg)
|
|
|
|
def test_affine(self):
|
|
im = Vips.Image.new_from_file("images/IMG_4618.jpg")
|
|
|
|
# vsqbs is non-interpolatory, don't test this way
|
|
for name in ["nearest", "bicubic", "bilinear", "nohalo", "lbb"]:
|
|
x = im
|
|
interpolate = Vips.Interpolate.new(name)
|
|
for i in range(4):
|
|
x = x.affine([0, 1, 1, 0], interpolate = interpolate)
|
|
|
|
self.assertEqual((x - im).abs().max(), 0)
|
|
|
|
def test_resize(self):
|
|
im = Vips.Image.new_from_file("images/IMG_4618.jpg")
|
|
im2 = im.resize(0.25)
|
|
self.assertEqual(im2.width, im.width // 4)
|
|
self.assertEqual(im2.height, im.height // 4)
|
|
|
|
def test_shrink(self):
|
|
im = Vips.Image.new_from_file("images/IMG_4618.jpg")
|
|
im2 = im.shrink(4, 4)
|
|
self.assertEqual(im2.width, im.width // 4)
|
|
self.assertEqual(im2.height, im.height // 4)
|
|
|
|
def test_similarity(self):
|
|
im = Vips.Image.new_from_file("images/IMG_4618.jpg")
|
|
im2 = im.similarity(angle = 90)
|
|
im3 = im.affine([0, -1, 1, 0])
|
|
# rounding in calculating the affine transform from the angle stops this
|
|
# being exactly true
|
|
self.assertTrue((im2 - im3).abs().max() < 50)
|
|
|
|
def test_similarity_scale(self):
|
|
im = Vips.Image.new_from_file("images/IMG_4618.jpg")
|
|
im2 = im.similarity(scale = 2)
|
|
im3 = im.affine([2, 0, 0, 2])
|
|
self.assertEqual((im2 - im3).abs().max(), 0)
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|