1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
# coding: utf-8
# /*##########################################################################
#
# Copyright (c) 2017-2018 European Synchrotron Radiation Facility
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ###########################################################################*/
"""Test of utils module."""
__authors__ = ["T. Vincent"]
__license__ = "MIT"
__date__ = "16/01/2017"
import numpy
import unittest
from silx.gui import qt
from silx.utils.testutils import ParametricTestCase
from silx.gui.utils.testutils import TestCaseQt
from silx.gui.utils.image import convertArrayToQImage, convertQImageToArray
class TestQImageConversion(TestCaseQt, ParametricTestCase):
"""Tests conversion of QImage to/from numpy array."""
def testConvertArrayToQImage(self):
"""Test conversion of numpy array to QImage"""
for format_, channels in [('Format_RGB888', 3),
('Format_ARGB32', 4)]:
with self.subTest(format_):
image = numpy.arange(
3*3*channels, dtype=numpy.uint8).reshape(3, 3, channels)
qimage = convertArrayToQImage(image)
self.assertEqual(qimage.height(), image.shape[0])
self.assertEqual(qimage.width(), image.shape[1])
self.assertEqual(qimage.format(), getattr(qt.QImage, format_))
for row in range(3):
for col in range(3):
# Qrgb has no alpha channel, not compared
# Qt uses x,y while array is row,col...
self.assertEqual(qt.QColor(qimage.pixel(col, row)),
qt.QColor(*image[row, col, :3]))
def testConvertQImageToArray(self):
"""Test conversion of QImage to numpy array"""
for format_, channels in [
('Format_RGB888', 3), # Native support
('Format_ARGB32', 4), # Native support
('Format_RGB32', 3)]: # Conversion to RGB
with self.subTest(format_):
color = numpy.arange(channels) # RGB(A) values
qimage = qt.QImage(3, 3, getattr(qt.QImage, format_))
qimage.fill(qt.QColor(*color))
image = convertQImageToArray(qimage)
self.assertEqual(qimage.height(), image.shape[0])
self.assertEqual(qimage.width(), image.shape[1])
self.assertEqual(image.shape[2], len(color))
self.assertTrue(numpy.all(numpy.equal(image, color)))
def suite():
test_suite = unittest.TestSuite()
test_suite.addTest(unittest.defaultTestLoader.loadTestsFromTestCase(
TestQImageConversion))
return test_suite
if __name__ == '__main__':
unittest.main(defaultTest='suite')
|
