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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
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