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# Copyright (c) 2005-2023, Enthought Inc.
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in LICENSE.txt and may be redistributed only
# under the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
# Thanks for using Enthought open source!
import unittest
import sys
from traits.testing.optional_dependencies import numpy as np, requires_numpy
from pyface.qt import qt_api
from pyface.qt.QtGui import QColor, QIcon, QImage, QPixmap
from ..image_helpers import (
bitmap_to_icon, bitmap_to_image, image_to_array, image_to_bitmap,
array_to_image, AspectRatio, ScaleMode, resize_image, resize_bitmap,
)
class TestImageHelpers(unittest.TestCase):
def test_image_to_bitmap(self):
qimage = QImage(32, 64, QImage.Format.Format_RGB32)
qimage.fill(QColor(0x44, 0x88, 0xcc))
qpixmap = image_to_bitmap(qimage)
self.assertIsInstance(qpixmap, QPixmap)
def test_bitmap_to_image(self):
qpixmap = QPixmap(32, 64)
qpixmap.fill(QColor(0x44, 0x88, 0xcc))
qimage = bitmap_to_image(qpixmap)
self.assertIsInstance(qimage, QImage)
def test_bitmap_to_icon(self):
qpixmap = QPixmap(32, 64)
qpixmap.fill(QColor(0x44, 0x88, 0xcc))
qimage = bitmap_to_icon(qpixmap)
self.assertIsInstance(qimage, QIcon)
def test_resize_image(self):
qimage = QImage(32, 64, QImage.Format.Format_RGB32)
qimage.fill(QColor(0x44, 0x88, 0xcc))
qimage = resize_image(qimage, (128, 128))
self.assertIsInstance(qimage, QImage)
self.assertEqual(qimage.width(), 128)
self.assertEqual(qimage.height(), 128)
def test_resize_image_smooth(self):
qimage = QImage(32, 64, QImage.Format.Format_RGB32)
qimage.fill(QColor(0x44, 0x88, 0xcc))
qimage = resize_image(qimage, (128, 128), mode=ScaleMode.smooth)
self.assertIsInstance(qimage, QImage)
self.assertEqual(qimage.width(), 128)
self.assertEqual(qimage.height(), 128)
def test_resize_image_constrain(self):
qimage = QImage(32, 64, QImage.Format.Format_RGB32)
qimage.fill(QColor(0x44, 0x88, 0xcc))
qimage = resize_image(qimage, (128, 128), AspectRatio.keep_constrain)
self.assertIsInstance(qimage, QImage)
self.assertEqual(qimage.width(), 64)
self.assertEqual(qimage.height(), 128)
def test_resize_image_expand(self):
qimage = QImage(32, 64, QImage.Format.Format_RGB32)
qimage.fill(QColor(0x44, 0x88, 0xcc))
qimage = resize_image(qimage, (128, 128), AspectRatio.keep_expand)
self.assertIsInstance(qimage, QImage)
self.assertEqual(qimage.width(), 128)
self.assertEqual(qimage.height(), 256)
def test_resize_bitmap(self):
qpixmap = QPixmap(32, 64)
qpixmap.fill(QColor(0x44, 0x88, 0xcc))
qpixmap = resize_bitmap(qpixmap, (128, 128))
self.assertIsInstance(qpixmap, QPixmap)
self.assertEqual(qpixmap.width(), 128)
self.assertEqual(qpixmap.height(), 128)
def test_resize_bitmap_smooth(self):
qpixmap = QPixmap(32, 64)
qpixmap.fill(QColor(0x44, 0x88, 0xcc))
qpixmap = resize_bitmap(qpixmap, (128, 128), mode=ScaleMode.smooth)
self.assertIsInstance(qpixmap, QPixmap)
self.assertEqual(qpixmap.width(), 128)
self.assertEqual(qpixmap.height(), 128)
def test_resize_bitmap_constrain(self):
qpixmap = QPixmap(32, 64)
qpixmap.fill(QColor(0x44, 0x88, 0xcc))
qpixmap = resize_bitmap(qpixmap, (128, 128), AspectRatio.keep_constrain)
self.assertIsInstance(qpixmap, QPixmap)
self.assertEqual(qpixmap.width(), 64)
self.assertEqual(qpixmap.height(), 128)
def test_resize_bitmap_expand(self):
qpixmap = QPixmap(32, 64)
qpixmap.fill(QColor(0x44, 0x88, 0xcc))
qpixmap = resize_bitmap(qpixmap, (128, 128), AspectRatio.keep_expand)
self.assertIsInstance(qpixmap, QPixmap)
self.assertEqual(qpixmap.width(), 128)
self.assertEqual(qpixmap.height(), 256)
@requires_numpy
class TestArrayImageHelpers(unittest.TestCase):
def test_image_to_array_rgb(self):
qimage = QImage(32, 64, QImage.Format.Format_RGB32)
qimage.fill(QColor(0x44, 0x88, 0xcc))
array = image_to_array(qimage)
self.assertEqual(array.shape, (64, 32, 4))
self.assertEqual(array.dtype, np.dtype('uint8'))
self.assertTrue(np.all(array[:, :, 3] == 0xff))
self.assertTrue(np.all(array[:, :, 0] == 0x44))
self.assertTrue(np.all(array[:, :, 1] == 0x88))
self.assertTrue(np.all(array[:, :, 2] == 0xcc))
def test_image_to_array_rgba(self):
qimage = QImage(32, 64, QImage.Format.Format_ARGB32)
qimage.fill(QColor(0x44, 0x88, 0xcc, 0xee))
array = image_to_array(qimage)
self.assertEqual(array.shape, (64, 32, 4))
self.assertEqual(array.dtype, np.dtype('uint8'))
self.assertTrue(np.all(array[:, :, 0] == 0x44))
self.assertTrue(np.all(array[:, :, 1] == 0x88))
self.assertTrue(np.all(array[:, :, 2] == 0xcc))
self.assertTrue(np.all(array[:, :, 3] == 0xee))
def test_image_to_array_bad(self):
qimage = QImage(32, 64, QImage.Format.Format_RGB30)
qimage.fill(QColor(0x44, 0x88, 0xcc))
with self.assertRaises(ValueError):
image_to_array(qimage)
@unittest.skipIf(
qt_api == 'pyside2' and sys.platform == 'linux',
"Pyside2 QImage.pixel returns signed integers on linux"
)
def test_array_to_image_rgb(self):
array = np.empty((64, 32, 3), dtype='uint8')
array[:, :, 0] = 0x44
array[:, :, 1] = 0x88
array[:, :, 2] = 0xcc
qimage = array_to_image(array)
self.assertEqual(qimage.width(), 32)
self.assertEqual(qimage.height(), 64)
self.assertEqual(qimage.format(), QImage.Format.Format_RGB32)
self.assertTrue(all(
qimage.pixel(i, j) == 0xff4488cc
for i in range(32) for j in range(64)
))
@unittest.skipIf(
qt_api == 'pyside2' and sys.platform == 'linux',
"Pyside2 QImage.pixel returns signed integers on linux"
)
def test_array_to_image_rgba(self):
array = np.empty((64, 32, 4), dtype='uint8')
array[:, :, 0] = 0x44
array[:, :, 1] = 0x88
array[:, :, 2] = 0xcc
array[:, :, 3] = 0xee
qimage = array_to_image(array)
self.assertEqual(qimage.width(), 32)
self.assertEqual(qimage.height(), 64)
self.assertEqual(qimage.format(), QImage.Format.Format_ARGB32)
self.assertTrue(all(
qimage.pixel(i, j) == 0xee4488cc
for i in range(32) for j in range(64)
))
def test_array_to_image_bad_channels(self):
array = np.empty((64, 32, 2), dtype='uint8')
array[:, :, 0] = 0x44
array[:, :, 1] = 0x88
with self.assertRaises(ValueError):
array_to_image(array)
def test_array_to_image_bad_ndim(self):
array = np.full((64, 32), 0x44, dtype='uint8')
with self.assertRaises(ValueError):
array_to_image(array)
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