qt5base-lts/util/glgen/qopenglversionfunctions.h.header

/****************************************************************************
**
** Copyright (C) 2013 Klaralvdalens Datakonsult AB (KDAB)
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
**
** This file was generated by glgen version 0.1
** Command line was: glgen
**
** glgen is Copyright (C) 2013 Klaralvdalens Datakonsult AB (KDAB)
**
** This is an auto-generated file.
** Do not edit! All changes made to it will be lost.
**
****************************************************************************/

#ifndef QOPENGLVERSIONFUNCTIONS_H
#define QOPENGLVERSIONFUNCTIONS_H

#include <QtCore/qglobal.h>

#ifndef QT_NO_OPENGL

#include <QtCore/qhash.h>
#include <QtCore/qpair.h>
#include <QtGui/qopengl.h>

QT_BEGIN_NAMESPACE

class QOpenGLContext;

#if 0
// silence syncqt warnings
#pragma qt_class(QOpenGLVersionFunctions)
#pragma qt_sync_stop_processing
#endif

struct QOpenGLVersionStatus
{
    enum OpenGLStatus {
        CoreStatus,
        DeprecatedStatus,
        InvalidStatus
    };

    QOpenGLVersionStatus()
        : version(qMakePair(0, 0)),
          status(InvalidStatus)
    {}

    QOpenGLVersionStatus(int majorVersion, int minorVersion, QOpenGLVersionStatus::OpenGLStatus functionStatus)
        : version(qMakePair(majorVersion, minorVersion)),
          status(functionStatus)
    {}

    QPair<int, int> version;
    OpenGLStatus status;
};

inline uint qHash(const QOpenGLVersionStatus &v, uint seed)
{
    return qHash(static_cast<int>(v.status * 1000)
               + v.version.first * 100 + v.version.second * 10, seed);
}

inline bool operator==(const QOpenGLVersionStatus &lhs, const QOpenGLVersionStatus &rhs)
{
    if (lhs.status != rhs.status)
        return false;
    return lhs.version == rhs.version;
}

inline bool operator!=(const QOpenGLVersionStatus &lhs, const QOpenGLVersionStatus &rhs)
{
    return !operator==(lhs, rhs);
}

class QOpenGLVersionFunctionsBackend
{
public:
    QOpenGLVersionFunctionsBackend(QOpenGLContext *ctx)
        : context(ctx)
    {}

    QOpenGLContext *context;
    QAtomicInt refs;
};

class QAbstractOpenGLFunctionsPrivate
{
public:
    QAbstractOpenGLFunctionsPrivate()
        : owningContext(0),
          initialized(false)
    {}

    static QOpenGLVersionFunctionsBackend *functionsBackend(QOpenGLContext *context,
                                                            const QOpenGLVersionStatus &v);
    static void insertFunctionsBackend(QOpenGLContext *context,
                                       const QOpenGLVersionStatus &v,
                                       QOpenGLVersionFunctionsBackend *backend);
    static void removeFunctionsBackend(QOpenGLContext *context, const QOpenGLVersionStatus &v);

    QOpenGLContext *owningContext;
    bool initialized;
};

class QAbstractOpenGLFunctions
{
public:
    virtual ~QAbstractOpenGLFunctions();

    virtual bool initializeOpenGLFunctions();

    Q_DECLARE_PRIVATE(QAbstractOpenGLFunctions)

protected:
    QAbstractOpenGLFunctions();
    QAbstractOpenGLFunctionsPrivate *d_ptr;

    bool isInitialized() const;

    void setOwningContext(const QOpenGLContext *context);
    QOpenGLContext *owningContext() const;

    friend class QOpenGLContext;
};

#if !defined(QT_OPENGL_ES_2)