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****************************************************************************/

#include "qgraphicssystem_gl_p.h"

#include <QGraphicsView>

#include "private/qpixmap_raster_p.h"

#include "private/qpixmapdata_gl_p.h"

#include "private/qwindowsurface_gl_p.h"

#include "private/qgl_p.h"

#include <private/qwindowsurface_raster_p.h>

#if defined(Q_WS_X11) && !defined(QT_NO_EGL)

#include "private/qpixmapdata_x11gl_p.h"

#include "private/qwindowsurface_x11gl_p.h"

#endif

QT_BEGIN_NAMESPACE

extern QGLWidget *qt_gl_getShareWidget();

QPixmapData *QGLGraphicsSystem::createPixmapData(QPixmapData::PixelType type) const

{

    return new QGLPixmapData(type);

}

QWindowSurface *QGLGraphicsSystem::createWindowSurface(QWidget *widget) const

{

#ifdef Q_WS_WIN

    // On Windows the QGLWindowSurface class can't handle

    // drop shadows and native effects, e.g. fading a menu in/out using

    // top level window opacity.

    if (widget->windowType() == Qt::Popup)

        return new QRasterWindowSurface(widget);

#endif

#if defined(Q_WS_X11) && !defined(QT_NO_EGL)

    if (m_useX11GL && QX11GLPixmapData::hasX11GLPixmaps()) {

        // If the widget is a QGraphicsView which will be re-drawing the entire

        // scene each frame anyway, we should use QGLWindowSurface as this may

        // provide proper buffer flipping, which should be faster than QX11GL's

        // blitting approach:

        QGraphicsView* qgv = qobject_cast<QGraphicsView*>(widget);

        if (qgv && qgv->viewportUpdateMode() == QGraphicsView::FullViewportUpdate)

            return new QGLWindowSurface(widget);

        else

            return new QX11GLWindowSurface(widget);

    }

#endif

    return new QGLWindowSurface(widget);

}

QT_END_NAMESPACE