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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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, Nokia gives you certain additional
+** rights. These rights are described in the Nokia 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.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QGUIGLCONTEXT_P_H
+#define QGUIGLCONTEXT_P_H
+
+#include "qguiglcontext_qpa.h"
+#include <private/qobject_p.h>
+#include <qmutex.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Gui)
+
+class QGuiGLContext;
+class QGLMultiGroupSharedResource;
+
+class Q_GUI_EXPORT QGLSharedResource
+{
+public:
+ QGLSharedResource(QGuiGLContextGroup *group);
+ virtual ~QGLSharedResource() = 0;
+
+ QGuiGLContextGroup *group() const { return m_group; }
+
+ // schedule the resource for deletion at an appropriate time
+ void free();
+
+protected:
+ // the resource's share group no longer exists, invalidate the resource
+ virtual void invalidateResource() = 0;
+
+ // a valid context in the group is current, free the resource
+ virtual void freeResource(QGuiGLContext *context) = 0;
+
+private:
+ QGuiGLContextGroup *m_group;
+
+ friend class QGuiGLContextGroup;
+ friend class QGuiGLContextGroupPrivate;
+
+ Q_DISABLE_COPY(QGLSharedResource);
+};
+
+class Q_GUI_EXPORT QGuiGLContextGroupPrivate : public QObjectPrivate
+{
+ Q_DECLARE_PUBLIC(QGuiGLContextGroup);
+public:
+ QGuiGLContextGroupPrivate()
+ : m_context(0)
+ , m_mutex(QMutex::Recursive)
+ , m_refs(0)
+ {
+ }
+
+ void addContext(QGuiGLContext *ctx);
+ void removeContext(QGuiGLContext *ctx);
+
+ void deletePendingResources(QGuiGLContext *ctx);
+
+ QGuiGLContext *m_context;
+
+ QList<QGuiGLContext *> m_shares;
+ QMutex m_mutex;
+
+ QHash<QGLMultiGroupSharedResource *, QGLSharedResource *> m_resources;
+ QAtomicInt m_refs;
+
+ QList<QGLSharedResource *> m_sharedResources;
+ QList<QGLSharedResource *> m_pendingDeletion;
+
+ void cleanupResources(QGuiGLContext *ctx);
+};
+
+class Q_GUI_EXPORT QGLMultiGroupSharedResource
+{
+public:
+ QGLMultiGroupSharedResource();
+ ~QGLMultiGroupSharedResource();
+
+ void insert(QGuiGLContext *context, QGLSharedResource *value);
+ void cleanup(QGuiGLContext *context);
+ void cleanup(QGuiGLContext *context, QGLSharedResource *value);
+
+ QGLSharedResource *value(QGuiGLContext *context);
+
+ template <typename T>
+ T *value(QGuiGLContext *context) {
+ QGuiGLContextGroup *group = context->shareGroup();
+ T *resource = static_cast<T *>(group->d_func()->m_resources.value(this, 0));
+ if (!resource) {
+ resource = new T(context);
+ insert(context, resource);
+ }
+ return resource;
+ }
+
+private:
+ QAtomicInt active;
+ QList<QGuiGLContextGroup *> m_groups;
+};
+
+class Q_GUI_EXPORT QGuiGLContextPrivate : public QObjectPrivate
+{
+ Q_DECLARE_PUBLIC(QGuiGLContext);
+public:
+ QGuiGLContextPrivate()
+ : qGLContextHandle(0)
+ , platformGLContext(0)
+ , shareContext(0)
+ , shareGroup(0)
+ , screen(0)
+ , surface(0)
+ {
+ }
+
+ virtual ~QGuiGLContextPrivate()
+ {
+ //do not delete the QGLContext handle here as it is deleted in
+ //QWidgetPrivate::deleteTLSysExtra()
+ }
+ void *qGLContextHandle;
+ void (*qGLContextDeleteFunction)(void *handle);
+
+ QSurfaceFormat requestedFormat;
+ QPlatformGLContext *platformGLContext;
+ QGuiGLContext *shareContext;
+ QGuiGLContextGroup *shareGroup;
+ QScreen *screen;
+ QSurface *surface;
+
+ QHash<QGLMultiGroupSharedResource *, void *> m_resources;
+
+ static void setCurrentContext(QGuiGLContext *context);
+};
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QGUIGLCONTEXT_P_H