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80 lines
4.3 KiB
C
80 lines
4.3 KiB
C
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/***************************************************************************
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qgsrasterviewport.h - description
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-------------------
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begin : Fri Jun 28 2002
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copyright : (C) 2005 by T.Sutton
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email : tim@linfiniti.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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/* $Id: qgsrasterlayer.h 4380 2005-12-26 23:37:50Z timlinux $ */
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#ifndef QGSRASTERVIEWPORT_H
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#define QGSRASTERVIEWPORT_H
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#include <qgspoint.h>
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/** \file qgsrasterviewport.h
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* \brief This class provides details of the viewable area that a raster will
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* be rendered into.
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*
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* The qgsrasterviewport class sets up a viewport / area of interest to be used
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* by rasterlayer draw functions at the point of drawing to the screen.
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*/
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struct QgsRasterViewPort
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{
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/** \brief The offset from the left hand edge of the raster for the rectangle that will be drawn to screen.
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* TODO Check this explanation is correc!*/
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int rectXOffsetInt;
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float rectXOffsetFloat;
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/** \brief The offset from the bottom edge of the raster for the rectangle that will be drawn to screen.
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* TODO Check this explanation is correc!*/
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int rectYOffsetInt;
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float rectYOffsetFloat;
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/** \brief Lower left X dimension of clipped raster image in raster pixel space.
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* RasterIO will do the scaling for us, so for example, if the user is zoomed in a long way, there may only
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* be e.g. 5x5 pixels retrieved from the raw raster data, but rasterio will seamlessly scale the up to
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* whatever the screen coordinates are (e.g. a 600x800 display window) */
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double clippedXMinDouble;
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/** \brief Top Right X dimension of clipped raster image in raster pixel space.
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* RasterIO will do the scaling for us, so for example, if the user is zoomed in a long way, there may only
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* be e.g. 5x5 pixels retrieved from the raw raster data, but rasterio will seamlessly scale the up to
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* whatever the screen coordinates are (e.g. a 600x800 display window) */
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double clippedXMaxDouble;
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/** \brief Lower left Y dimension of clipped raster image in raster pixel space.
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* RasterIO will do the scaling for us, so for example, if the user is zoomed in a long way, there may only
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* be e.g. 5x5 pixels retrieved from the raw raster data, but rasterio will seamlessly scale the up to
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* whatever the screen coordinates are (e.g. a 600x800 display window) */
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double clippedYMinDouble;
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/** \brief Top Right X dimension of clipped raster image in raster pixel space.
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* RasterIO will do the scaling for us, so for example, if the user is zoomed in a long way, there may only
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* be e.g. 5x5 pixels retrieved from the raw raster data, but rasterio will seamlessly scale the up to
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* whatever the screen coordinates are (e.g. a 600x800 display window) */
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double clippedYMaxDouble;
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/** \brief Distance in pixels from clippedXMinDouble to clippedXMaxDouble. */
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int clippedWidthInt;
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/** \brief Distance in pixels from clippedYMinDouble to clippedYMaxDouble */
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int clippedHeightInt;
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/** \brief Coordinate (in geographic coordinate system) of top left corner of the part of the raster that
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* is to be rendered.*/
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QgsPoint topLeftPoint;
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/** \brief Coordinate (in geographic coordinate system) of bottom right corner of the part of the raster that
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* is to be rendered.*/
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QgsPoint bottomRightPoint;
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/** \brief Distance in map units from left edge to right edge for the part of the raster that
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* is to be rendered.*/
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int drawableAreaXDimInt;
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/** \brief Distance in map units from bottom edge to top edge for the part of the raster that
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* is to be rendered.*/
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int drawableAreaYDimInt;
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};
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#endif //QGSRASTERVIEWPORT_H
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