From 113de3584e12aebd45a2cc1d54e63a3827bf0489 Mon Sep 17 00:00:00 2001
From: Friedemann Kleint <Friedemann.Kleint@qt.io>
Date: Fri, 28 Jan 2022 09:29:52 +0100
Subject: QWebEngineView Designer plugin: Fix crash on Windows when using D3D11

Disable the plugin for non-OpenGL graphics API similar to
qttools/482125b15648944d18ae120644f9ffe11b327ff2 for QQuickWidget.

Fixes: QTBUG-100285
Change-Id: Icea3d81c97ef043e953334b134ba632a9daa13a5
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
(cherry picked from commit cd716a2ea2a1f0a3222dcb3cea5d4cee903def09)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 .../plugins/qwebengineview/qwebengineview_plugin.cpp             | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'src')

diff --git a/src/webenginewidgets/plugins/qwebengineview/qwebengineview_plugin.cpp b/src/webenginewidgets/plugins/qwebengineview/qwebengineview_plugin.cpp
index dff041800..b9c8252a0 100644
--- a/src/webenginewidgets/plugins/qwebengineview/qwebengineview_plugin.cpp
+++ b/src/webenginewidgets/plugins/qwebengineview/qwebengineview_plugin.cpp
@@ -43,6 +43,7 @@
 #include <QtDesigner/QExtensionManager>
 
 #include <QtCore/qplugin.h>
+#include <QtQuick/QQuickWindow>
 #include <QWebEngineView>
 
 QT_BEGIN_NAMESPACE
@@ -114,6 +115,14 @@ void QWebEngineViewPlugin::initialize(QDesignerFormEditorInterface * /*core*/)
 
 QString QWebEngineViewPlugin::domXml() const
 {
+    const auto graphicsApi = QQuickWindow::graphicsApi();
+    if (graphicsApi != QSGRendererInterface::OpenGLRhi
+        && graphicsApi != QSGRendererInterface::Software) {
+        qWarning("Qt Designer: The QWebEngineView custom widget plugin is disabled because it requires OpenGL/Software RHI (current: %d).",
+                 int(graphicsApi));
+        return {};
+    }
+
     return QStringLiteral("\
     <ui language=\"c++\">\
         <widget class=\"QWebEngineView\" name=\"webEngineView\">\
-- 
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