Pillow/Tests/test_qt_image_toqimage.py

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from .helper import PillowTestCase, hopper
from .test_imageqt import PillowQtTestCase
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from PIL import ImageQt, Image
if ImageQt.qt_is_installed:
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from PIL.ImageQt import QImage
try:
from PyQt5 import QtGui
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from PyQt5.QtWidgets import QWidget, QHBoxLayout, QLabel, QApplication
QT_VERSION = 5
except (ImportError, RuntimeError):
try:
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from PySide2 import QtGui
from PySide2.QtWidgets import QWidget, QHBoxLayout, QLabel, \
QApplication
QT_VERSION = 5
except (ImportError, RuntimeError):
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try:
from PyQt4 import QtGui
from PyQt4.QtGui import QWidget, QHBoxLayout, QLabel, \
QApplication
QT_VERSION = 4
except (ImportError, RuntimeError):
from PySide import QtGui
from PySide.QtGui import QWidget, QHBoxLayout, QLabel, \
QApplication
QT_VERSION = 4
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class TestToQImage(PillowQtTestCase, PillowTestCase):
def test_sanity(self):
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for mode in ('RGB', 'RGBA', 'L', 'P', '1'):
src = hopper(mode)
data = ImageQt.toqimage(src)
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self.assertIsInstance(data, QImage)
self.assertFalse(data.isNull())
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# reload directly from the qimage
rt = ImageQt.fromqimage(data)
if mode in ('L', 'P', '1'):
self.assert_image_equal(rt, src.convert('RGB'))
else:
self.assert_image_equal(rt, src)
if mode == '1':
# BW appears to not save correctly on QT4 and QT5
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# kicks out errors on console:
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# libpng warning: Invalid color type/bit depth combination
# in IHDR
# libpng error: Invalid IHDR data
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continue
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# Test saving the file
tempfile = self.tempfile('temp_{}.png'.format(mode))
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data.save(tempfile)
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# Check that it actually worked.
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reloaded = Image.open(tempfile)
# Gray images appear to come back in palette mode.
# They're roughly equivalent
if QT_VERSION == 4 and mode == 'L':
src = src.convert('P')
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self.assert_image_equal(reloaded, src)
def test_segfault(self):
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app = QApplication([])
ex = Example()
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assert app # Silence warning
assert ex # Silence warning
if ImageQt.qt_is_installed:
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class Example(QWidget):
def __init__(self):
super(Example, self).__init__()
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img = hopper().resize((1000, 1000))
qimage = ImageQt.ImageQt(img)
pixmap1 = QtGui.QPixmap.fromImage(qimage)
QHBoxLayout(self) # hbox
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lbl = QLabel(self)
# Segfault in the problem
lbl.setPixmap(pixmap1.copy())