libvips/test/test_draw.py

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2015-01-28 15:53:34 +01:00
#!/usr/bin/python
import unittest
import math
#import logging
#logging.basicConfig(level = logging.DEBUG)
from gi.repository import Vips
Vips.leak_set(True)
2015-01-28 15:53:34 +01:00
# 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 TestDraw(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_draw_circle(self):
im = Vips.Image.black(100, 100)
im = im.draw_circle(100, 50, 50, 25)
pixel = im.getpoint(25, 50)
self.assertEqual(len(pixel), 1)
self.assertEqual(pixel[0], 100)
pixel = im.getpoint(26, 50)
self.assertEqual(len(pixel), 1)
self.assertEqual(pixel[0], 0)
im = Vips.Image.black(100, 100)
im = im.draw_circle(100, 50, 50, 25, fill = True)
pixel = im.getpoint(25, 50)
self.assertEqual(len(pixel), 1)
self.assertEqual(pixel[0], 100)
pixel = im.getpoint(26, 50)
self.assertEqual(pixel[0], 100)
pixel = im.getpoint(24, 50)
self.assertEqual(pixel[0], 0)
def test_draw_flood(self):
im = Vips.Image.black(100, 100)
im = im.draw_circle(100, 50, 50, 25)
im = im.draw_flood(100, 50, 50)
im2 = Vips.Image.black(100, 100)
im2 = im.draw_circle(100, 50, 50, 25, fill = True)
diff = (im - im2).abs().max()
self.assertEqual(diff, 0)
def test_draw_image(self):
im = Vips.Image.black(51, 51)
im = im.draw_circle(100, 25, 25, 25, fill = True)
im2 = Vips.Image.black(100, 100)
im2 = im2.draw_image(im, 25, 25)
im3 = Vips.Image.black(100, 100)
im3 = im3.draw_circle(100, 50, 50, 25, fill = True)
diff = (im2 - im3).abs().max()
self.assertEqual(diff, 0)
def test_draw_line(self):
im = Vips.Image.black(100, 100)
im = im.draw_line(100, 0, 0, 100, 0)
pixel = im.getpoint(0, 0)
self.assertEqual(len(pixel), 1)
self.assertEqual(pixel[0], 100)
pixel = im.getpoint(0, 1)
self.assertEqual(len(pixel), 1)
self.assertEqual(pixel[0], 0)
def test_draw_mask(self):
mask = Vips.Image.black(51, 51)
mask = mask.draw_circle(128, 25, 25, 25, fill = True)
im = Vips.Image.black(100, 100)
im = im.draw_mask(200, mask, 25, 25)
im2 = Vips.Image.black(100, 100)
im2 = im2.draw_circle(100, 50, 50, 25, fill = True)
diff = (im - im2).abs().max()
self.assertEqual(diff, 0)
def test_draw_rect(self):
im = Vips.Image.black(100, 100)
im = im.draw_rect(100, 25, 25, 50, 50, fill = True)
im2 = Vips.Image.black(100, 100)
for y in range(25, 75):
im2 = im2.draw_line(100, 25, y, 74, y)
diff = (im - im2).abs().max()
self.assertEqual(diff, 0)
def test_draw_smudge(self):
im = Vips.Image.black(100, 100)
im = im.draw_circle(100, 50, 50, 25, fill = True)
im2 = im.draw_smudge(10, 10, 50, 50)
im3 = im.crop(10, 10, 50, 50)
im4 = im2.draw_image(im3, 10, 10)
diff = (im4 - im).abs().max()
self.assertEqual(diff, 0)
if __name__ == '__main__':
unittest.main()