QGIS API Documentation 3.29.0-Master (ade4f0cf0f)
qgsrasterlayerrenderer.h
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1/***************************************************************************
2 qgsrasterlayerrenderer.h
3 --------------------------------------
4 Date : December 2013
5 Copyright : (C) 2013 by Martin Dobias
6 Email : wonder dot sk at gmail dot com
7 ***************************************************************************
8 * *
9 * This program is free software; you can redistribute it and/or modify *
10 * it under the terms of the GNU General Public License as published by *
11 * the Free Software Foundation; either version 2 of the License, or *
12 * (at your option) any later version. *
13 * *
14 ***************************************************************************/
15
16#ifndef QGSRASTERLAYERRENDERER_H
17#define QGSRASTERLAYERRENDERER_H
18
19#define SIP_NO_FILE
20
21#include "qgsmaplayerrenderer.h"
24
25class QPainter;
26
27class QgsMapToPixel;
28class QgsRasterLayer;
29class QgsRasterPipe;
32
34
35#include "qgsrasterinterface.h"
36
38
45class CORE_EXPORT QgsRasterLayerRendererFeedback : public QgsRasterBlockFeedback
46{
47 Q_OBJECT
48
49 public:
51 explicit QgsRasterLayerRendererFeedback( QgsRasterLayerRenderer *r );
52
54 void onNewData() override;
55 private:
56 QgsRasterLayerRenderer *mR = nullptr;
57 int mMinimalPreviewInterval;
58 QTime mLastPreview;
59};
60
62
71{
72 public:
73 QgsRasterLayerRenderer( QgsRasterLayer *layer, QgsRenderContext &rendererContext );
74 ~QgsRasterLayerRenderer() override;
75
76 bool render() override;
77 QgsFeedback *feedback() const override;
78 bool forceRasterRender() const override;
79
80 private:
81
82 QgsRasterViewPort *mRasterViewPort = nullptr;
83
84 double mLayerOpacity = 1.0;
85 QgsRasterPipe *mPipe = nullptr;
86
87 QgsRasterDataProvider::Capability mProviderCapabilities;
88
90 QgsRasterLayerRendererFeedback *mFeedback = nullptr;
91
92 QList< QgsMapClippingRegion > mClippingRegions;
93
94 friend class QgsRasterLayerRendererFeedback;
95};
96
97
98#endif // QGSRASTERLAYERRENDERER_H
Base class for feedback objects to be used for cancellation of something running in a worker thread.
Definition: qgsfeedback.h:45
Base class for utility classes that encapsulate information necessary for rendering of map layers.
Perform transforms between map coordinates and device coordinates.
Definition: qgsmaptopixel.h:39
Feedback object tailored for raster block reading.
virtual void onNewData()
May be emitted by raster data provider to indicate that some partial data are available and a new pre...
Capability
If you add to this, please also add to capabilitiesString()
Implementation of threaded rendering for raster layers.
Represents a raster layer.
Contains a pipeline of raster interfaces for sequential raster processing.
Definition: qgsrasterpipe.h:50
Contains information about the context of a rendering operation.
This class provides details of the viewable area that a raster will be rendered into.