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Scale the painter, not the images for performance reasons

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This commit is contained in:
Martin Tůma 2021-01-31 10:30:06 +01:00
parent 33f2002a52
commit 97dbfb163b
1 changed files with 6 additions and 2 deletions
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8
src/map/IMG/rastertile.cpp
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@ -227,9 +227,13 @@ void RasterTile::drawPolygons(QPainter *painter)
SubFile::Handle hdl(poly.raster.lbl());
QImage img(poly.raster.lbl()->readImage(hdl, poly.raster.id()));
qreal sx = (qreal)size.width() / (qreal)img.width();
qreal sy = (qreal)size.height() / (qreal)img.height();
painter->drawImage(tl, img.scaled(size, Qt::IgnoreAspectRatio,
Qt::SmoothTransformation));
painter->save();
painter->scale(sx, sy);
painter->drawImage(QPointF(tl.x() / sx, tl.y() / sy), img);
painter->restore();
//painter->setPen(Qt::blue);
//painter->setBrush(Qt::NoBrush);