qt-everywhere-src-5.15.1/qtdeclarative/src/plugins/scenegraph/openvg/qopenvgoffscreensurface.h

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#ifndef QOPENVGOFFSCREENSURFACE_H
#define QOPENVGOFFSCREENSURFACE_H

#include "qopenvgcontext_p.h"

QT_BEGIN_NAMESPACE

class QOpenVGOffscreenSurface
{
public:
    QOpenVGOffscreenSurface(const QSize &size);
    ~QOpenVGOffscreenSurface();

    void makeCurrent();
    void doneCurrent();
    void swapBuffers();

    VGImage image() { return m_image; }
    QSize size() const { return m_size; }

    QImage readbackQImage();

private:
    VGImage m_image;
    QSize m_size;
    EGLContext m_context;
    EGLSurface m_renderTarget;
    EGLContext m_previousContext = EGL_NO_CONTEXT;
    EGLSurface m_previousReadSurface = EGL_NO_SURFACE;
    EGLSurface m_previousDrawSurface = EGL_NO_SURFACE;
    EGLDisplay m_display;
};

QT_END_NAMESPACE

#endif // QOPENVGOFFSCREENSURFACE_H