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Fix crashes when using webengine on windows with no native GUI

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Tell Qt to use the software OpenGL renderer in headless mode on windows.
This commit is contained in:
Kovid Goyal 2019-09-06 12:13:30 +05:30
parent 03929d5959
commit 2f2b3cf638
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GPG Key ID: 06BC317B515ACE7C
2 changed files with 30 additions and 25 deletions
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8
src/calibre/gui2/__init__.py
View File

@ -1203,6 +1203,8 @@ def ensure_app(headless=True):
args += ['-platformpluginpath', plugins_loc, '-platform', 'headless']
if isosx:
os.environ['QT_MAC_DISABLE_FOREGROUND_APPLICATION_TRANSFORM'] = '1'
if headless and iswindows:
QApplication.setAttribute(Qt.AA_UseSoftwareOpenGL, True)
_store_app = QApplication(args)
if headless and has_headless:
_store_app.headless = True
@ -1222,6 +1224,12 @@ def ensure_app(headless=True):
except:
pass
sys.excepthook = eh
return _store_app
def destroy_app():
global _store_app
_store_app = None
def app_is_headless():

19
src/calibre/test_build.py
View File

@ -187,6 +187,7 @@ class BuildTest(unittest.TestCase):
@unittest.skipIf('SKIP_QT_BUILD_TEST' in os.environ, 'Skipping Qt build test as it causes crashes in the macOS VM')
def test_qt(self):
from PyQt5.QtCore import QTimer
from PyQt5.QtWidgets import QApplication
from PyQt5.QtWebEngineWidgets import QWebEnginePage
from PyQt5.QtGui import QImageReader, QFontDatabase
from PyQt5.QtNetwork import QNetworkAccessManager
@ -210,12 +211,10 @@ class BuildTest(unittest.TestCase):
# Run the imaging tests
test()
from calibre.gui2 import Application
from calibre.gui2 import ensure_app, destroy_app
os.environ.pop('DISPLAY', None)
has_headless = isosx or islinux
app = Application([], headless=has_headless)
ensure_app()
self.assertGreaterEqual(len(QFontDatabase().families()), 5, 'The QPA headless plugin is not able to locate enough system fonts via fontconfig')
if has_headless:
from calibre.ebooks.covers import create_cover
create_cover('xxx', ['yyy'])
na = QNetworkAccessManager()
@ -223,29 +222,27 @@ class BuildTest(unittest.TestCase):
if iswindows:
from PyQt5.Qt import QtWin
QtWin
if has_headless:
# Causes crash on exit under windows+cygwin+ssh
p = QWebEnginePage()
def callback(result):
callback.result = result
if hasattr(print_callback, 'result'):
Application.instance().quit()
QApplication.instance().quit()
def print_callback(result):
print_callback.result = result
if hasattr(callback, 'result'):
Application.instance().quit()
QApplication.instance().quit()
p.runJavaScript('1 + 1', callback)
p.printToPdf(print_callback)
QTimer.singleShot(5000, lambda: Application.instance().quit())
app.exec_()
QTimer.singleShot(5000, lambda: QApplication.instance().quit())
QApplication.instance().exec_()
self.assertEqual(callback.result, 2)
self.assertIn(b'Skia/PDF', bytes(print_callback.result))
del p
del na
del app
destroy_app()
del QWebEnginePage
def test_imaging(self):