def image_and_format_from_data(data):
' Create an image object from the specified data which should be a bytestring and also return the format of the image '
ba = QByteArray(data)
buf = QBuffer(ba)
buf.open(QIODevice.OpenModeFlag.ReadOnly)
r = QImageReader(buf)
fmt = bytes(r.format()).decode('utf-8')
return r.read(), fmt
def verify_theme(report):
must_use_qt()
report.bad = bad = {}
for name, path in iteritems(report.name_map):
reader = QImageReader(os.path.join(report.path, path))
img = reader.read()
if img.isNull():
bad[name] = reader.errorString()
return bool(bad)
def image_extensions():
if not hasattr(image_extensions, 'ans'):
image_extensions.ans = [
x.data().decode('utf-8')
for x in QImageReader.supportedImageFormats()
]
return image_extensions.ans
def test_qt(self):
if is_sanitized:
raise unittest.SkipTest('Skipping Qt build test as sanitizer is enabled')
from qt.core import QTimer
from qt.core import QApplication
from qt.webengine import QWebEnginePage
from qt.core import QImageReader, QFontDatabase
from qt.core import QNetworkAccessManager
from calibre.utils.img import image_from_data, image_to_data, test
# Ensure that images can be read before QApplication is constructed.
# Note that this requires QCoreApplication.libraryPaths() to return the
# path to the Qt plugins which it always does in the frozen build,
# because Qt is patched to know the layout of the calibre application
# package. On non-frozen builds, it should just work because the
# hard-coded paths of the Qt installation should work. If they do not,
# then it is a distro problem.
fmts = set(map(lambda x: x.data().decode('utf-8'), QImageReader.supportedImageFormats())) # no2to3
testf = {'jpg', 'png', 'svg', 'ico', 'gif', 'webp'}
self.assertEqual(testf.intersection(fmts), testf, "Qt doesn't seem to be able to load some of its image plugins. Available plugins: %s" % fmts)
data = P('images/blank.png', allow_user_override=False, data=True)
img = image_from_data(data)
image_from_data(P('catalog/mastheadImage.gif', allow_user_override=False, data=True))
for fmt in 'png bmp jpeg'.split():
d = image_to_data(img, fmt=fmt)
image_from_data(d)
# Run the imaging tests
test()
from calibre.gui2 import ensure_app, destroy_app
display_env_var = os.environ.pop('DISPLAY', None)
try:
ensure_app()
self.assertGreaterEqual(len(QFontDatabase().families()), 5, 'The QPA headless plugin is not able to locate enough system fonts via fontconfig')
from calibre.ebooks.covers import create_cover
create_cover('xxx', ['yyy'])
na = QNetworkAccessManager()
self.assertTrue(hasattr(na, 'sslErrors'), 'Qt not compiled with openssl')
if iswindows:
from qt.core import QtWin
QtWin
p = QWebEnginePage()
def callback(result):
callback.result = result
if hasattr(print_callback, 'result'):
QApplication.instance().quit()
def print_callback(result):
print_callback.result = result
if hasattr(callback, 'result'):
QApplication.instance().quit()
p.runJavaScript('1 + 1', callback)
p.printToPdf(print_callback)
QTimer.singleShot(5000, lambda: QApplication.instance().quit())
QApplication.instance().exec_()
test_flaky = ismacos and not is_ci
if not test_flaky:
self.assertEqual(callback.result, 2, 'Simple JS computation failed')
self.assertIn(b'Skia/PDF', bytes(print_callback.result), 'Print to PDF failed')
del p
del na
destroy_app()
del QWebEnginePage
finally:
if display_env_var is not None:
os.environ['DISPLAY'] = display_env_var