DlgFilterWorker.h

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/******************************************************************************************************
 * (C) 2014 markummitchell@github.com. This file is part of Engauge Digitizer, which is released      *
 * under GNU General Public License version 2 (GPLv2) or (at your option) any later version. See file *
 * LICENSE or go to gnu.org/licenses for details. Distribution requires prior written permission.     *
 ******************************************************************************************************/
 
#ifndef DLG_FILTER_WORKER_H
#define DLG_FILTER_WORKER_H
 
#include "ColorFilterMode.h"
#include "DlgFilterCommand.h"
#include <QImage>
#include <QList>
#include <QObject>
#include <QPixmap>
#include <QRgb>
#include <QTimer>
 
typedef QList<DlgFilterCommand> FilterCommandQueue;
 
class DlgFilterWorker : public QObject
{
  Q_OBJECT;
 
public:
  DlgFilterWorker(const QPixmap &pixmapOriginal,
                  QRgb m_rgbBackground);
 
public slots:
  void slotNewParameters (ColorFilterMode colorFilterMode,
                          double low,
                          double high);
 
private slots:
  void slotRestartTimeout ();
 
signals:
  void signalTransferPiece (int xLeft,
                            QImage image);
 
private:
  DlgFilterWorker();
 
  QImage m_imageOriginal; // Use QImage rather than QPixmap so we can access pixel by pixel
  QRgb m_rgbBackground;
 
  FilterCommandQueue m_inputCommandQueue;
  ColorFilterMode m_colorFilterMode; // Set when processing restarts
  double m_low;
  double m_high;
 
  int m_xLeft;
  QTimer m_restartTimer; // Decouple slotRestartProcessing from the processing that this class performs
};
 
#endif // DLG_FILTER_WORKER_H