text: /****************************************************************************
  **
  ** Copyright (C) 2016 The Qt Company Ltd.
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  ** This file is part of the QtGui module of the Qt Toolkit.
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  ** accordance with the commercial license agreement provided with the
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  ** packaging of this file. Please review the following information to
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  ****************************************************************************/
  
  #ifndef QOFFSCREENSURFACE_H
  #define QOFFSCREENSURFACE_H
  
  #include <QtGui/qtguiglobal.h>
  #include <QtCore/QObject>
  #include <QtGui/qsurface.h>
  
  QT_BEGIN_NAMESPACE
  
  class QOffscreenSurfacePrivate;
  
  class QScreen;
  class QPlatformOffscreenSurface;
  
  class Q_GUI_EXPORT QOffscreenSurface : public QObject, public QSurface
  {
      Q_OBJECT
      Q_DECLARE_PRIVATE(QOffscreenSurface)
  
  public:
  
      explicit QOffscreenSurface(QScreen *screen = Q_NULLPTR);
      virtual ~QOffscreenSurface();
  
      SurfaceType surfaceType() const Q_DECL_OVERRIDE;
  
      void create();
      void destroy();
  
      bool isValid() const;
  
      void setFormat(const QSurfaceFormat &format);
      QSurfaceFormat format() const Q_DECL_OVERRIDE;
      QSurfaceFormat requestedFormat() const;
  
      QSize size() const Q_DECL_OVERRIDE;
  
      QScreen *screen() const;
      void setScreen(QScreen *screen);
  
      QPlatformOffscreenSurface *handle() const;
  
      void *nativeHandle() const;
      void setNativeHandle(void *handle);
  
  Q_SIGNALS:
      void screenChanged(QScreen *screen);
  
  private Q_SLOTS:
      void screenDestroyed(QObject *screen);
  
  private:
  
      QPlatformSurface *surfaceHandle() const Q_DECL_OVERRIDE;
  
      Q_DISABLE_COPY(QOffscreenSurface)
  };
  
  QT_END_NAMESPACE
  
  #endif // QOFFSCREENSURFACE_H
  