static void createPlatformGraphicsContext3DFromWidget(QWidget* widget, PlatformGraphicsContext3D* context,
PlatformGraphicsSurface3D* surface)
{
*context = 0;
*surface = 0;
QAbstractScrollArea* scrollArea = qobject_cast<QAbstractScrollArea*>(widget);
if (!scrollArea)
return;
QGLWidget* glViewport = qobject_cast<QGLWidget*>(scrollArea->viewport());
if (!glViewport)
return;
QGLWidget* glWidget = new QGLWidget(0, glViewport);
if (glWidget->isValid()) {
// Geometry can be set to zero because m_glWidget is used only for its QGLContext.
glWidget->setGeometry(0, 0, 0, 0);
#if HAVE(QT5)
*surface = glWidget->windowHandle();
*context = glWidget->context()->contextHandle();
#else
*surface = glWidget;
*context = const_cast<QGLContext*>(glWidget->context());
#endif
} else {
delete glWidget;
glWidget = 0;
}
}
