QGIS API Documentation  2.17.0-Master (973e4b0)
qgsrasterdrawer.h
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1 /***************************************************************************
2  qgsrasterdrawer.h
3  -------------------
4  begin : June 2012
5  copyright : (C) 2012 by Radim Blazek
6  email : radim dot blazek at gmail.com
7  ***************************************************************************/
8 
9 /***************************************************************************
10  * *
11  * This program is free software; you can redistribute it and/or modify *
12  * it under the terms of the GNU General Public License as published by *
13  * the Free Software Foundation; either version 2 of the License, or *
14  * (at your option) any later version. *
15  * *
16  ***************************************************************************/
17 
18 #ifndef QGSRASTERDRAWER_H
19 #define QGSRASTERDRAWER_H
20 
21 #include "qgsrasterinterface.h"
22 #include <QMap>
23 
24 class QPainter;
25 class QImage;
26 class QgsMapToPixel;
27 class QgsRenderContext;
28 struct QgsRasterViewPort;
29 class QgsRasterIterator;
30 
34 class CORE_EXPORT QgsRasterDrawer
35 {
36  public:
38 
45  void draw( QPainter* p, QgsRasterViewPort* viewPort, const QgsMapToPixel* theQgsMapToPixel, const QgsRenderContext *ctx = nullptr );
46 
47  protected:
57  void drawImage( QPainter* p, QgsRasterViewPort* viewPort, const QImage& img, int topLeftCol, int topLeftRow, const QgsMapToPixel* mapToPixel = nullptr ) const;
58 
59  private:
60  QgsRasterIterator* mIterator;
61 };
62 
63 #endif // QGSRASTERDRAWER_H
Iterator for sequentially processing raster cells.
Perform transforms between map coordinates and device coordinates.
Definition: qgsmaptopixel.h:34
The drawing pipe for raster layers.
Contains information about the context of a rendering operation.
This class provides details of the viewable area that a raster will be rendered into.