From 3d6d6594b0dd2a8860b8fddd5a58f86c4ebd255c Mon Sep 17 00:00:00 2001
From: Simon Hausmann <simon.hausmann@digia.com>
Date: Wed, 26 Mar 2014 12:21:25 +0100
Subject: Centralize OpenGL initialization

We now require the user to use QWebEngine::initialize() in main (preferably) and
print out an error message if this wasn't set up accordingly. This limits the use
of private scene graph API to inside QWebEngine and offers public API for users
of the API.

Change-Id: I787c176a85ab7784dbc8787d9876960b4872959e
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>
---
 src/webengine/api/qtwebengineglobal.cpp | 75 +++++++++++++++++++++++++++++++++
 src/webengine/api/qtwebengineglobal.h   |  6 +++
 2 files changed, 81 insertions(+)
 create mode 100644 src/webengine/api/qtwebengineglobal.cpp

(limited to 'src/webengine/api')

diff --git a/src/webengine/api/qtwebengineglobal.cpp b/src/webengine/api/qtwebengineglobal.cpp
new file mode 100644
index 000000000..4aa72ba6f
--- /dev/null
+++ b/src/webengine/api/qtwebengineglobal.cpp
@@ -0,0 +1,75 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtWebEngine module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qtwebengineglobal.h"
+
+#include <private/qsgcontext_p.h>
+#include <QGuiApplication>
+
+static QOpenGLContext *shareContext;
+
+static void deleteShareContext()
+{
+    delete shareContext;
+    shareContext = 0;
+}
+
+void QWebEngine::initialize()
+{
+    QCoreApplication *app = QCoreApplication::instance();
+    if (!app) {
+        qFatal("QWebEngine::initialize() must be called after the construction of the application object.");
+        return;
+    }
+    if (app->thread() != QThread::currentThread()) {
+        qFatal("QWebEngine::initialize() must be called from the Qt gui thread.");
+        return;
+    }
+
+    if (shareContext)
+        return;
+
+    shareContext = new QOpenGLContext;
+    shareContext->create();
+    qAddPostRoutine(deleteShareContext);
+    QSGContext::setSharedOpenGLContext(shareContext);
+}
+
diff --git a/src/webengine/api/qtwebengineglobal.h b/src/webengine/api/qtwebengineglobal.h
index 46f77c55f..f5fa479d9 100644
--- a/src/webengine/api/qtwebengineglobal.h
+++ b/src/webengine/api/qtwebengineglobal.h
@@ -55,6 +55,12 @@ QT_BEGIN_NAMESPACE
 #  define Q_WEBENGINE_EXPORT
 #endif
 
+class Q_WEBENGINE_EXPORT QWebEngine
+{
+public:
+    static void initialize();
+};
+
 QT_END_NAMESPACE
 
 #endif // QTWEBENGINEGLOBAL_H
-- 
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