qglscreen_qws.cpp

奇趣公司比较新的qt/emd版本

/****************************************************************************
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of the QtOpenGL module of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at [e-mail].
**
** In addition, as a special exception, Trolltech gives you certain
** additional rights. These rights are described in the Trolltech GPL
** Exception version 1.0, which can be found at
** http://www.trolltech.com/products/qt/gplexception/ and in the file
** GPL_EXCEPTION.txt in this package.
**
** In addition, as a special exception, Trolltech, as the sole copyright
** holder for Qt Designer, grants users of the Qt/Eclipse Integration
** plug-in the right for the Qt/Eclipse Integration to link to
** functionality provided by Qt Designer and its related libraries.
**
** Trolltech reserves all rights not expressly granted herein.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include <QGLScreen>
#include <QGLContext>
#include <QGLWidget>
#include "private/qglwindowsurface_qws_p.h"

class QGLScreenPrivate
{

};

/*!
  \internal
  \preliminary
  \class QGLScreen

  \brief This class encapsulates an OpenGL screen driver.
*/

QGLScreen::QGLScreen(int displayId)
    : QScreen(displayId), d_ptr(new QGLScreenPrivate)
{
}

QGLScreen::~QGLScreen()
{
    delete d_ptr;
}

/*!
    \since 4.3

    Initializes the \a context and sets up the QGLWindowSurface of the
    QWidget of \a context based on the parameters of \a context and
    based on its own requirements.  The format() of \a context needs
    to be updated with the actual parameters of the OpenGLES drawable
    that was set up.

    \a shareContext is used in the same way as for QGLContext. It is
    the context with which \a context shares display lists and texture
    ids etc. The window surface must be set up so that this sharing
    works.

    Returns true in case of success and false if it is not possible to
    create the necessary OpenGLES drawable/context.
*/
bool
QGLScreen::chooseContext(QGLContext *context, const QGLContext *shareContext)
{
    Q_UNUSED(shareContext);

    if (context->device()->devType() == QInternal::Widget) {
        QGLWidget *widget = static_cast<QGLWidget*>(context->device());
        QWSGLWindowSurface *surface =
	    static_cast<QWSGLWindowSurface*>(widget->windowSurface());
        surface->setContext(context);
        return true;
    }
    return false;
}