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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"
#include "qmeegoswitchevent.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()
{
    if (isRunningMeeGo())
        return;

    if (QApplicationPrivate::instance()->graphics_system_name != QLatin1String("runtime"))
        qWarning("Can't switch to meego - switching only supported with 'runtime' graphics system.");
    else {
        QMeeGoSwitchEvent willSwitchEvent(QLatin1String("meego"), QMeeGoSwitchEvent::WillSwitch);
        foreach (QWidget *widget, QApplication::topLevelWidgets())
            QCoreApplication::sendEvent(widget, &willSwitchEvent);

        QApplication *app = static_cast<QApplication *>(QCoreApplication::instance());
        app->setGraphicsSystem(QLatin1String("meego"));

        QMeeGoSwitchEvent didSwitchEvent(QLatin1String("meego"), QMeeGoSwitchEvent::DidSwitch);
        foreach (QWidget *widget, QApplication::topLevelWidgets())
            QCoreApplication::sendEvent(widget, &didSwitchEvent);
    }
}

void QMeeGoGraphicsSystemHelper::switchToRaster()
{
    if (runningGraphicsSystemName() == QLatin1String("raster"))
        return;

    if (QApplicationPrivate::instance()->graphics_system_name != QLatin1String("runtime"))
        qWarning("Can't switch to raster - switching only supported with 'runtime' graphics system.");
    else {
        QMeeGoSwitchEvent willSwitchEvent(QLatin1String("raster"), QMeeGoSwitchEvent::WillSwitch);
        foreach (QWidget *widget, QApplication::topLevelWidgets())
            QCoreApplication::sendEvent(widget, &willSwitchEvent);

        QApplication *app = static_cast<QApplication *>(QCoreApplication::instance());
        app->setGraphicsSystem(QLatin1String("raster"));

	QMeeGoRuntime::invalidateLiveSurfaces();

        QMeeGoSwitchEvent didSwitchEvent(QLatin1String("raster"), QMeeGoSwitchEvent::DidSwitch);
        foreach (QWidget *widget, QApplication::topLevelWidgets())
            QCoreApplication::sendEvent(widget, &didSwitchEvent);
    }
}

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;
}