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# qwindowsurface_ahigl_p.h Example File
qtopiacore/ahigl/qwindowsurface_ahigl_p.h

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     #ifndef QWINDOWSURFACE_AHIGL_P_H
     #define QWINDOWSURFACE_AHIGL_P_H

     //
     //  W A R N I N G
     //  -------------
     //
     // This file is not part of the Qt API.  It exists for the convenience
     // of the QAhiGLWindowSurface class.  This header file may change from
     // version to version without notice, or even be removed.
     //
     // We mean it.
     //

     #include <QtOpenGL/private/qglwindowsurface_qws_p.h>
     #include <GLES/gl.h>
     #include <GLES/egl.h>

     class QAhiGLWindowSurfacePrivate;

     class QAhiGLWindowSurface : public QWSGLWindowSurface
     {
     public:
         QAhiGLWindowSurface(QWidget *widget, EGLDisplay eglDisplay,
                             EGLSurface eglSurface, EGLContext eglContext);
         QAhiGLWindowSurface(EGLDisplay eglDisplay, EGLSurface eglSurface,
                             EGLContext eglContext);
         ~QAhiGLWindowSurface();

         QString key() const { return QLatin1String("ahigl"); }
         void setGeometry(const QRect &rect);
         QPaintDevice *paintDevice();
         void beginPaint(const QRegion &region);
         bool isValid() const;

         QByteArray permanentState() const;
         void setPermanentState(const QByteArray &);

         QImage image() const { return QImage(); }

         GLuint textureId() const;

     private:
         QAhiGLWindowSurfacePrivate *d_ptr;
     };

     #endif // QWINDOWSURFACE_AHIGL_P_H