File indexing completed on 2024-05-05 03:49:48

 // SPDX-License-Identifier: LGPL-2.1-or-later
 //
 // SPDX-FileCopyrightText: 2006-2007 Torsten Rahn <tackat@kde.org>
 // SPDX-FileCopyrightText: 2007 Inge Wallin <ingwa@kde.org>
 // SPDX-FileCopyrightText: 2008, 2009, 2010 Jens-Michael Hoffmann <jmho@c-xx.com>
 // SPDX-FileCopyrightText: 2008-2009 Patrick Spendrin <ps_ml@gmx.de>
 //
 
 #include "FogLayer.h"
 
 #include "GeoPainter.h"
 #include "ViewportParams.h"
 #include "RenderState.h"
 
 namespace Marble
 {
     
 QStringList FogLayer::renderPosition() const
 {
     return QStringList(QStringLiteral("ATMOSPHERE"));
 }
 
 bool FogLayer::render( GeoPainter *painter,
                        ViewportParams *viewParams,
                        const QString &renderPos,
                        GeoSceneLayer *layer )
 {
     Q_UNUSED(renderPos)
     Q_UNUSED(layer)
 
     // FIXME: The fog layer is really slow. That's why we defer it to
     //        PrintQuality. Either cache on a pixmap - or maybe
     //        better: Add to GlobeScanlineTextureMapper.
     if ( painter->mapQuality() != PrintQuality )
         return true;
 
     if ( viewParams->projection() != Spherical)
         return true;
 
     // No use to draw the fog if it's not visible in the area.
     if ( viewParams->mapCoversViewport() )
         return true;
 
     int imgWidth2  = viewParams->width() / 2;
     int imgHeight2 = viewParams->height() / 2;
 
     int radius = viewParams->radius();
 
     // Recalculate the atmosphere effect and paint it to canvasImage.
     QRadialGradient grad1( QPointF( imgWidth2, imgHeight2 ), radius );
 
     // FIXME: Add a cosine relationship
     grad1.setColorAt( 0.85, QColor( 255, 255, 255, 0 ) );
     grad1.setColorAt( 1.00, QColor( 255, 255, 255, 64 ) );
 
     QBrush    brush1( grad1 );
     QPen      pen1( Qt::NoPen );
 
     painter->save();
 
     painter->setBrush( brush1 );
     painter->setPen( pen1 );
     painter->setRenderHint( QPainter::Antialiasing, false );
 
     // FIXME: Cut out what's really needed
     painter->drawEllipse( imgWidth2  - radius,
                          imgHeight2 - radius,
                          2 * radius,
                          2 * radius );
 
     painter->restore();
 
     return true;
 }
 
 RenderState FogLayer::renderState() const
 {
     return RenderState(QStringLiteral("Fog"));
 }
 
 }