qt-everywhere-src-5.14.1/qtbase/tests/manual/qopengltextureblitter/qopengltextureblitwindow.h

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** This file is part of the test suite of the Qt Toolkit.
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#ifndef QOPENGLTEXTUREBLITWINDOW_H
#define QOPENGLTEXTUREBLITWINDOW_H

#include <QtGui/QWindow>
#include <QtGui/QOpenGLContext>
#include <QtGui/QOpenGLTextureBlitter>

class QOpenGLTextureBlitWindow : public QWindow
{
    Q_OBJECT
public:
    QOpenGLTextureBlitWindow();

    void render();
protected:
    void exposeEvent(QExposeEvent *event);
    void resizeEvent(QResizeEvent *event);

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

    QScopedPointer<QOpenGLContext> m_context;
    QOpenGLTextureBlitter m_blitter;
    QImage m_image;
    QImage m_image_mirrord;
};

#endif