QGIS API Documentation
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src
core
raster
qgsrasterlayerrenderer.h
Go to the documentation of this file.
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/***************************************************************************
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qgsrasterlayerrenderer.h
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--------------------------------------
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Date : December 2013
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Copyright : (C) 2013 by Martin Dobias
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Email : wonder dot sk at gmail dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef QGSRASTERLAYERRENDERER_H
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#define QGSRASTERLAYERRENDERER_H
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#define SIP_NO_FILE
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#include "
qgsmaplayerrenderer.h
"
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#include "
qgsmapclippingregion.h
"
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class
QPainter;
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class
QgsMapToPixel
;
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class
QgsRasterLayer
;
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class
QgsRasterPipe
;
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struct
QgsRasterViewPort
;
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class
QgsRenderContext
;
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class
QgsRasterLayerRenderer
;
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#include "
qgsrasterinterface.h
"
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class
CORE_EXPORT QgsRasterLayerRendererFeedback :
public
QgsRasterBlockFeedback
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{
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Q_OBJECT
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public
:
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explicit
QgsRasterLayerRendererFeedback(
QgsRasterLayerRenderer
*r );
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void
onNewData
()
override
;
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private
:
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QgsRasterLayerRenderer
*mR =
nullptr
;
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int
mMinimalPreviewInterval;
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QTime mLastPreview;
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};
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class
CORE_EXPORT
QgsRasterLayerRenderer
:
public
QgsMapLayerRenderer
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{
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public
:
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QgsRasterLayerRenderer
(
QgsRasterLayer
*layer,
QgsRenderContext
&rendererContext );
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~QgsRasterLayerRenderer
()
override
;
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bool
render()
override
;
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QgsFeedback
*feedback()
const override
;
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bool
forceRasterRender()
const override
;
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private
:
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QString mLayerName;
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QgsRasterViewPort
*mRasterViewPort =
nullptr
;
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double
mLayerOpacity = 1.0;
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std::unique_ptr<QgsRasterPipe> mPipe;
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Qgis::RasterProviderCapabilities
mProviderCapabilities;
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Qgis::RasterInterfaceCapabilities
mInterfaceCapabilities;
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QgsRasterLayerRendererFeedback *mFeedback =
nullptr
;
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QList< QgsMapClippingRegion > mClippingRegions;
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double
mElevationScale = 1.0;
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double
mElevationOffset = 0.0;
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int
mElevationBand = 0;
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bool
mDrawElevationMap =
false
;
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bool
mEnableProfile =
false
;
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quint64 mPreparationTime = 0;
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void
drawElevationMap();
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friend
class
QgsRasterLayerRendererFeedback;
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};
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#endif
// QGSRASTERLAYERRENDERER_H
Qgis::RasterProviderCapabilities
QFlags< RasterProviderCapability > RasterProviderCapabilities
Raster data provider capabilities.
Definition
qgis.h:4542
Qgis::RasterInterfaceCapabilities
QFlags< RasterInterfaceCapability > RasterInterfaceCapabilities
Raster interface capabilities.
Definition
qgis.h:4509
QgsFeedback
Base class for feedback objects to be used for cancellation of something running in a worker thread.
Definition
qgsfeedback.h:44
QgsMapLayerRenderer
Base class for utility classes that encapsulate information necessary for rendering of map layers.
Definition
qgsmaplayerrenderer.h:52
QgsMapToPixel
Perform transforms between map coordinates and device coordinates.
Definition
qgsmaptopixel.h:37
QgsRasterBlockFeedback
Feedback object tailored for raster block reading.
Definition
qgsrasterinterface.h:42
QgsRasterBlockFeedback::onNewData
virtual void onNewData()
May be emitted by raster data provider to indicate that some partial data are available and a new pre...
Definition
qgsrasterinterface.h:53
QgsRasterLayerRenderer
Implementation of threaded rendering for raster layers.
Definition
qgsrasterlayerrenderer.h:68
QgsRasterLayer
Represents a raster layer.
Definition
qgsrasterlayer.h:78
QgsRasterPipe
Contains a pipeline of raster interfaces for sequential raster processing.
Definition
qgsrasterpipe.h:50
QgsRenderContext
Contains information about the context of a rendering operation.
Definition
qgsrendercontext.h:62
qgsmapclippingregion.h
qgsmaplayerrenderer.h
qgsrasterinterface.h
QgsRasterViewPort
This class provides details of the viewable area that a raster will be rendered into.
Definition
qgsrasterviewport.h:35
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