/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the plugins 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
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** use the contact form at http://qt.digia.com/contact-us.
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** 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
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** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** 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
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****************************************************************************/

#ifndef QGLXINTEGRATION_H
#define QGLXINTEGRATION_H

#include "qxcbwindow.h"
#include "qxcbscreen.h"

#include <qpa/qplatformopenglcontext.h>
#include <qpa/qplatformoffscreensurface.h>
#include <QtGui/QSurfaceFormat>

#include <QtCore/QMutex>

#include <GL/glx.h>

QT_BEGIN_NAMESPACE

class QGLXContext : public QPlatformOpenGLContext
{
public:
    QGLXContext(QXcbScreen *xd, const QSurfaceFormat &format, QPlatformOpenGLContext *share);
    ~QGLXContext();

    bool makeCurrent(QPlatformSurface *surface);
    void doneCurrent();
    void swapBuffers(QPlatformSurface *surface);
    void (*getProcAddress(const QByteArray &procName)) ();

    QSurfaceFormat format() const;
    bool isSharing() const;
    bool isValid() const;

    GLXContext glxContext() const { return m_context; }

    static bool supportsThreading();
    static void queryDummyContext();

private:
    QXcbScreen *m_screen;
    GLXContext m_context;
    GLXContext m_shareContext;
    QSurfaceFormat m_format;
    bool m_isPBufferCurrent;
    int m_swapInterval;
    static bool m_queriedDummyContext;
    static bool m_supportsThreading;
};


class QGLXPbuffer : public QPlatformOffscreenSurface
{
public:
    explicit QGLXPbuffer(QOffscreenSurface *offscreenSurface);
    ~QGLXPbuffer();

    QSurfaceFormat format() const { return m_format; }
    bool isValid() const { return m_pbuffer != 0; }

    GLXPbuffer pbuffer() const { return m_pbuffer; }

private:
    QSurfaceFormat m_format;
    QXcbScreen *m_screen;
    GLXPbuffer m_pbuffer;
};

QT_END_NAMESPACE

#endif