QGIS API Documentation  3.27.0-Master (e113457133)
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 "qgis_core.h"
22 #include "qgis_sip.h"
23 #include <QMap>
24 
25 class QPainter;
26 class QImage;
27 class QgsMapToPixel;
28 class QgsRenderContext;
29 struct QgsRasterViewPort;
31 class QgsRasterIterator;
32 
37 class CORE_EXPORT QgsRasterDrawer
38 {
39  public:
40 
46  QgsRasterDrawer( QgsRasterIterator *iterator, double dpiTarget = -1.0 );
47 
55  void draw( QPainter *p, QgsRasterViewPort *viewPort, const QgsMapToPixel *qgsMapToPixel, QgsRasterBlockFeedback *feedback = nullptr );
56 
57  protected:
58 
69  void drawImage( QPainter *p, QgsRasterViewPort *viewPort, const QImage &img, int topLeftCol, int topLeftRow, const QgsMapToPixel *mapToPixel = nullptr ) const SIP_SKIP;
70 
71  private:
72  QgsRasterIterator *mIterator = nullptr;
73  double mDpiTarget = -1.0;
74 };
75 
76 #endif // QGSRASTERDRAWER_H
Perform transforms between map coordinates and device coordinates.
Definition: qgsmaptopixel.h:39
Feedback object tailored for raster block reading.
The drawing pipe for raster layers.
Iterator for sequentially processing raster cells.
Contains information about the context of a rendering operation.
#define SIP_SKIP
Definition: qgis_sip.h:126
This class provides details of the viewable area that a raster will be rendered into.