From d73fef560e4b98253a8c769b21c3360d0e188756 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Wed, 10 Aug 2022 21:07:29 +0530
Subject: [PATCH] Allow using QtWebEngine in the main calibre application as
 well

---
 bypy/init_env.py             | 3 +++
 src/calibre/gui2/__init__.py | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/bypy/init_env.py b/bypy/init_env.py
index e955728f91..a16e06ab2f 100644
--- a/bypy/init_env.py
+++ b/bypy/init_env.py
@@ -34,6 +34,7 @@ dlls = [
     'Widgets',
     # 'Multimedia',
     'OpenGL',
+    'OpenGLWidgets',
     'Quick',
     'QuickWidgets',
     'Qml',
@@ -88,6 +89,8 @@ PYQT_MODULES = (
     'QtSensors',
     'QtSvg',
     'QtWidgets',
+    'QtOpenGL',
+    'QtOpenGLWidgets',
     'QtWebEngine',
     'QtWebEngineCore',
     'QtWebEngineWidgets',
diff --git a/src/calibre/gui2/__init__.py b/src/calibre/gui2/__init__.py
index e201e6d714..946a18e75f 100644
--- a/src/calibre/gui2/__init__.py
+++ b/src/calibre/gui2/__init__.py
@@ -1077,6 +1077,9 @@ class Application(QApplication):
         # Allow import of webengine after construction of QApplication on new
         # enough PyQt
         QApplication.setAttribute(Qt.ApplicationAttribute.AA_ShareOpenGLContexts)
+        # this import is needed to have Qt call qt_registerDefaultPlatformBackingStoreOpenGLSupport
+        from qt.core import QOpenGLWidget
+        del QOpenGLWidget
         if iswindows:
             self.windows_app_uid = None
             if windows_app_uid: