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Diffstat (limited to 'src/silx/gui/utils/test/test_image.py')
-rw-r--r-- | src/silx/gui/utils/test/test_image.py | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/src/silx/gui/utils/test/test_image.py b/src/silx/gui/utils/test/test_image.py new file mode 100644 index 0000000..62316b0 --- /dev/null +++ b/src/silx/gui/utils/test/test_image.py @@ -0,0 +1,79 @@ +# 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))) |