qt5base-lts/tests/manual/qopenglcontext/qopenglcontextwindow.h

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#ifndef QOPENGLCONTEXTWINDOW_H
#define QOPENGLCONTEXTWINDOW_H

#include <QtGui/QWindow>
#include <QtGui/QOpenGLContext>
#include <QtGui/QImage>
#include <QtCore/QVariant>
#include <QtGui/private/qopengltextureblitter_p.h>

class QOpenGLContextWindow : public QWindow
{
    Q_OBJECT

public:
    QOpenGLContextWindow();
    ~QOpenGLContextWindow();

    void render();

protected:
    void exposeEvent(QExposeEvent *event);

private:
    qreal dWidth() const { return width() * devicePixelRatio(); }
    qreal dHeight() const { return height() * devicePixelRatio(); }
    void createForeignContext();

    QOpenGLContext *m_context;
    QImage m_image;
    QVariant m_nativeHandle;
    uint m_textureId;
    QOpenGLTextureBlitter *m_blitter;
};

#endif