/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
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** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
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** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
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** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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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
** met: http://www.gnu.org/copyleft/gpl.html.
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****************************************************************************/

#define ENSURE_RUNNING_MEEGO {if (! QMeeGoGraphicsSystemHelper::isRunningMeeGo()) { qFatal("Using meego functionality but not running meego graphics system!"); }}

#include "qmeegographicssystemhelper.h"
#include <private/qapplication_p.h>
#include <private/qgraphicssystem_runtime_p.h>
#include <private/qpixmap_raster_p.h>
#include <private/qwindowsurface_gl_p.h>
#include "qmeegoruntime.h"

QString QMeeGoGraphicsSystemHelper::runningGraphicsSystemName()
{
    if (! QApplicationPrivate::instance()) {
        qWarning("Querying graphics system but application not running yet!");
        return QString();
    }

    QString name = QApplicationPrivate::instance()->graphics_system_name;
    if (name == QLatin1String("runtime")) {
        QRuntimeGraphicsSystem *rsystem = (QRuntimeGraphicsSystem *) QApplicationPrivate::instance()->graphics_system;
        name = rsystem->graphicsSystemName();
    }

    return name;
}

bool QMeeGoGraphicsSystemHelper::isRunningMeeGo()
{
    return (runningGraphicsSystemName() == QLatin1String("meego"));
}

bool QMeeGoGraphicsSystemHelper::isRunningRuntime()
{
    return (QApplicationPrivate::instance()->graphics_system_name == QLatin1String("runtime"));
}

void QMeeGoGraphicsSystemHelper::switchToMeeGo()
{
    QMeeGoRuntime::switchToMeeGo();
}

void QMeeGoGraphicsSystemHelper::switchToRaster()
{
    QMeeGoRuntime::switchToRaster();
}

Qt::HANDLE QMeeGoGraphicsSystemHelper::imageToEGLSharedImage(const QImage &image)
{
    ENSURE_RUNNING_MEEGO;
    return QMeeGoRuntime::imageToEGLSharedImage(image);
}

QPixmap QMeeGoGraphicsSystemHelper::pixmapFromEGLSharedImage(Qt::HANDLE handle, const QImage &softImage)
{
    // This function is supported when not running meego too. A raster-backed
    // pixmap will be created... but when you switch back to 'meego', it'll 
    // be replaced with a EGL shared image backing.
    return QPixmap(QMeeGoRuntime::pixmapDataFromEGLSharedImage(handle, softImage));
}

QPixmap QMeeGoGraphicsSystemHelper::pixmapWithGLTexture(int w, int h)
{
    ENSURE_RUNNING_MEEGO;
    return QPixmap(QMeeGoRuntime::pixmapDataWithGLTexture(w, h));
}

bool QMeeGoGraphicsSystemHelper::destroyEGLSharedImage(Qt::HANDLE handle)
{
    ENSURE_RUNNING_MEEGO;
    return QMeeGoRuntime::destroyEGLSharedImage(handle);
}

void QMeeGoGraphicsSystemHelper::updateEGLSharedImagePixmap(QPixmap *p)
{
    ENSURE_RUNNING_MEEGO;
    return QMeeGoRuntime::updateEGLSharedImagePixmap(p);
}

void QMeeGoGraphicsSystemHelper::setTranslucent(bool translucent)
{
    ENSURE_RUNNING_MEEGO;
    QMeeGoRuntime::setTranslucent(translucent);
}

void QMeeGoGraphicsSystemHelper::setSwapBehavior(SwapMode mode)
{
    ENSURE_RUNNING_MEEGO;

    if (mode == AutomaticSwap)
        QGLWindowSurface::swapBehavior = QGLWindowSurface::AutomaticSwap;
    else if (mode == AlwaysFullSwap)
        QGLWindowSurface::swapBehavior = QGLWindowSurface::AlwaysFullSwap;
    else if (mode == AlwaysPartialSwap)
        QGLWindowSurface::swapBehavior = QGLWindowSurface::AlwaysPartialSwap;
    else if (mode == KillSwap)
        QGLWindowSurface::swapBehavior = QGLWindowSurface::KillSwap;
}

void QMeeGoGraphicsSystemHelper::setSwitchPolicy(SwitchPolicy policy)
{
    QMeeGoRuntime::setSwitchPolicy(policy);
}

void QMeeGoGraphicsSystemHelper::enableSwitchEvents()
{
    QMeeGoRuntime::enableSwitchEvents();
}