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src
core
raster
qgsrasterdrawer.h
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/***************************************************************************
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qgsrasterdrawer.h
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-------------------
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begin : June 2012
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copyright : (C) 2012 by Radim Blazek
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email : radim dot blazek at gmail.com
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***************************************************************************/
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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 QGSRASTERDRAWER_H
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#define QGSRASTERDRAWER_H
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#include "qgis_core.h"
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#include "
qgis_sip.h
"
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#include <QMap>
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class
QPainter;
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class
QImage;
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class
QgsMapToPixel
;
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class
QgsRenderContext
;
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struct
QgsRasterViewPort
;
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class
QgsRasterBlockFeedback
;
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class
QgsRasterIterator
;
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class
CORE_EXPORT
QgsRasterDrawer
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{
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public
:
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Q_DECL_DEPRECATED
QgsRasterDrawer
(
QgsRasterIterator
*iterator,
double
dpiTarget )
SIP_DEPRECATED
;
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QgsRasterDrawer
(
QgsRasterIterator
*iterator );
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void
draw( QPainter *p,
QgsRasterViewPort
*viewPort,
const
QgsMapToPixel
*qgsMapToPixel,
QgsRasterBlockFeedback
*feedback =
nullptr
);
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void
draw(
QgsRenderContext
&context,
QgsRasterViewPort
*viewPort,
QgsRasterBlockFeedback
*feedback =
nullptr
);
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protected
:
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void
drawImage( QPainter *p,
QgsRasterViewPort
*viewPort,
const
QImage &img,
int
topLeftCol,
int
topLeftRow,
const
QgsMapToPixel
*mapToPixel =
nullptr
)
const
SIP_SKIP
;
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private
:
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QgsRasterIterator
*mIterator =
nullptr
;
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double
mDpiTarget = -1.0;
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double
mDpiScaleFactor = 1.0;
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double
mDevicePixelRatio = 1.0;
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};
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#endif
// QGSRASTERDRAWER_H
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
QgsRasterDrawer
The drawing pipe for raster layers.
Definition
qgsrasterdrawer.h:38
QgsRasterIterator
Iterator for sequentially processing raster cells.
Definition
qgsrasteriterator.h:35
QgsRenderContext
Contains information about the context of a rendering operation.
Definition
qgsrendercontext.h:62
qgis_sip.h
SIP_DEPRECATED
#define SIP_DEPRECATED
Definition
qgis_sip.h:106
SIP_SKIP
#define SIP_SKIP
Definition
qgis_sip.h:126
QgsRasterViewPort
This class provides details of the viewable area that a raster will be rendered into.
Definition
qgsrasterviewport.h:35
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