text: /****************************************************************************
  **
  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the QtGui 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 The Qt Company. For licensing terms
  ** and conditions see https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://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 3 as published by the Free Software
  ** Foundation and appearing in the file LICENSE.LGPL3 included in the
  ** packaging of this file. Please review the following information to
  ** ensure the GNU Lesser General Public License version 3 requirements
  ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
  **
  ** GNU General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU
  ** General Public License version 2.0 or (at your option) the GNU General
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  ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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  ** information to ensure the GNU General Public License requirements will
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  ****************************************************************************/
  
  #ifndef QOPENGL_P_H
  #define QOPENGL_P_H
  
  //
  //  W A R N I N G
  //  -------------
  //
  // This file is not part of the Qt API.  It exists purely as an
  // implementation detail.  This header file may change from version to
  // version without notice, or even be removed.
  //
  // We mean it.
  //
  
  #include <QtGui/private/qtguiglobal_p.h>
  #include <qopengl.h>
  #include <private/qopenglcontext_p.h>
  #include <QtCore/qset.h>
  #include <QtCore/qstring.h>
  #include <QtCore/qversionnumber.h>
  
  QT_BEGIN_NAMESPACE
  
  class QJsonDocument;
  
  class Q_GUI_EXPORT QOpenGLExtensionMatcher
  {
  public:
      QOpenGLExtensionMatcher();
  
      bool match(const QByteArray &extension) const
      {
          return m_extensions.contains(extension);
      }
  
      QSet<QByteArray> extensions() const { return m_extensions; }
  
  private:
      QSet<QByteArray> m_extensions;
  };
  
  class Q_GUI_EXPORT QOpenGLConfig
  {
  public:
      struct Q_GUI_EXPORT Gpu {
          Gpu() : vendorId(0), deviceId(0) {}
          bool isValid() const { return deviceId || !glVendor.isEmpty(); }
          bool equals(const Gpu &other) const {
              return vendorId == other.vendorId && deviceId == other.deviceId && driverVersion == other.driverVersion
                  && driverDescription == other.driverDescription && glVendor == other.glVendor;
          }
  
          uint vendorId;
          uint deviceId;
          QVersionNumber driverVersion;
          QByteArray driverDescription;
          QByteArray glVendor;
  
          static Gpu fromDevice(uint vendorId, uint deviceId, QVersionNumber driverVersion, const QByteArray &driverDescription) {
              Gpu gpu;
              gpu.vendorId = vendorId;
              gpu.deviceId = deviceId;
              gpu.driverVersion = driverVersion;
              gpu.driverDescription = driverDescription;
              return gpu;
          }
  
          static Gpu fromGLVendor(const QByteArray &glVendor) {
              Gpu gpu;
              gpu.glVendor = glVendor;
              return gpu;
          }
  
          static Gpu fromContext();
      };
  
      static QSet<QString> gpuFeatures(const Gpu &gpu,
                                       const QString &osName, const QVersionNumber &kernelVersion, const QString &osVersion,
                                       const QJsonDocument &doc);
      static QSet<QString> gpuFeatures(const Gpu &gpu,
                                       const QString &osName, const QVersionNumber &kernelVersion, const QString &osVersion,
                                       const QString &fileName);
      static QSet<QString> gpuFeatures(const Gpu &gpu, const QJsonDocument &doc);
      static QSet<QString> gpuFeatures(const Gpu &gpu, const QString &fileName);
  };
  
  inline bool operator==(const QOpenGLConfig::Gpu &a, const QOpenGLConfig::Gpu &b)
  {
      return a.equals(b);
  }
  
  inline bool operator!=(const QOpenGLConfig::Gpu &a, const QOpenGLConfig::Gpu &b)
  {
      return !a.equals(b);
  }
  
  inline uint qHash(const QOpenGLConfig::Gpu &gpu)
  {
      return qHash(gpu.vendorId) + qHash(gpu.deviceId) + qHash(gpu.driverVersion);
  }
  
  QT_END_NAMESPACE
  
  #endif // QOPENGL_H
  