extrafiltersplugin.h Example File

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  #ifndef EXTRAFILTERSPLUGIN_H
  #define EXTRAFILTERSPLUGIN_H

  #include <interfaces.h>

  #include <QObject>
  #include <QtPlugin>
  #include <QStringList>
  #include <QImage>

  class ExtraFiltersPlugin : public QObject, public FilterInterface
  {
      Q_OBJECT
      Q_PLUGIN_METADATA(IID "org.qt-project.Qt.Examples.PlugAndPaint.FilterInterface" FILE "extrafilters.json")
      Q_INTERFACES(FilterInterface)

  public:
      QStringList filters() const override;
      QImage filterImage(const QString &filter, const QImage &image,
                         QWidget *parent) override;
  };

  #endif