/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
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** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
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** General Public License version 2.1 as published by the Free Software
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 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 the GNU General Public License version 3.0 requirements will be
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****************************************************************************/

#include "qminimaleglbackingstore.h"

#include <QtGui/QOpenGLContext>
#include <QtGui/QOpenGLPaintDevice>

QT_BEGIN_NAMESPACE

QMinimalEglBackingStore::QMinimalEglBackingStore(QWindow *window)
    : QPlatformBackingStore(window)
    , m_context(new QOpenGLContext)
{
    m_context->setFormat(window->requestedFormat());
    m_context->setScreen(window->screen());
    m_context->create();
}

QMinimalEglBackingStore::~QMinimalEglBackingStore()
{
    delete m_context;
}

QPaintDevice *QMinimalEglBackingStore::paintDevice()
{
    return m_device;
}

void QMinimalEglBackingStore::flush(QWindow *window, const QRegion &region, const QPoint &offset)
{
    Q_UNUSED(region);
    Q_UNUSED(offset);

#ifdef QEGL_EXTRA_DEBUG
    qWarning("QEglBackingStore::flush %p", window);
#endif

    m_context->swapBuffers(window);
}

void QMinimalEglBackingStore::beginPaint(const QRegion &)
{
    // needed to prevent QOpenGLContext::makeCurrent() from failing
    window()->setSurfaceType(QSurface::OpenGLSurface);

    m_context->makeCurrent(window());
    m_device = new QOpenGLPaintDevice(window()->size());
}

void QMinimalEglBackingStore::endPaint()
{
    delete m_device;
}

void QMinimalEglBackingStore::resize(const QSize &size, const QRegion &staticContents)
{
    Q_UNUSED(size);
    Q_UNUSED(staticContents);
}

QT_END_NAMESPACE
