main.cpp

#include <QApplication>
#include <QQmlApplicationEngine>
#include <QQmlContext>
#include "Filter.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QQmlApplicationEngine engine;

    Filter* filter = new Filter(NULL);
    engine.rootContext()->setContextProperty("filter", filter);
    engine.addImageProvider(QLatin1String("filter"), filter);
    engine.load(QUrl(QStringLiteral("qrc:/main.qml")));

    return app.exec();
}