qgsrasterdrawer.h

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/***************************************************************************
                         qgsrasterdrawer.h
                         -------------------
    begin                : June 2012
    copyright            : (C) 2012 by Radim Blazek
    email                : radim dot blazek at gmail.com
 ***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
 
#ifndef QGSRASTERDRAWER_H
#define QGSRASTERDRAWER_H
 
#include "qgis_core.h"
#include "qgis_sip.h"
 
#include <QMap>
 
class QPainter;
class QImage;
class QgsMapToPixel;
class QgsRenderContext;
struct QgsRasterViewPort;
class QgsRasterBlockFeedback;
class QgsRasterIterator;

class CORE_EXPORT QgsRasterDrawer
{
  public:

    Q_DECL_DEPRECATED QgsRasterDrawer( QgsRasterIterator *iterator, double dpiTarget ) SIP_DEPRECATED;

    QgsRasterDrawer( QgsRasterIterator *iterator );

    void draw( QPainter *p, QgsRasterViewPort *viewPort, const QgsMapToPixel *qgsMapToPixel, QgsRasterBlockFeedback *feedback = nullptr );

    void draw( QgsRenderContext &context, QgsRasterViewPort *viewPort, QgsRasterBlockFeedback *feedback = nullptr );
 
  protected:

    void drawImage( QPainter *p, QgsRasterViewPort *viewPort, const QImage &img, int topLeftCol, int topLeftRow, const QgsMapToPixel *mapToPixel = nullptr ) const SIP_SKIP;
 
  private:
    QgsRasterIterator *mIterator = nullptr;
    double mDpiTarget = -1.0;
    double mDpiScaleFactor = 1.0;
    double mDevicePixelRatio = 1.0;
};
 
#endif // QGSRASTERDRAWER_H