dxf export: fix svg scaling

(cherry picked from commit 4b55dbe)

Author: jef-n

src/core/dxf/qgsdxfexport.cpp

@@ -992,7 +992,7 @@ void QgsDxfExport::writeEntities()
     }
     else
     {
-      QgsDebugMsg( QStringLiteral( "%1: not override style" ).arg( vl->id() ) );
+      QgsDebugMsg( QStringLiteral( "%1: no override style" ).arg( vl->id() ) );
     }
 
     if ( !vl->renderer() )

src/core/symbology/qgsmarkersymbollayer.cpp

@@ -2354,9 +2354,6 @@ QgsSymbolLayer *QgsSvgMarkerSymbolLayer::createFromSld( QDomElement &element )
 
 bool QgsSvgMarkerSymbolLayer::writeDxf( QgsDxfExport &e, double mmMapUnitScaleFactor, const QString &layerName, QgsSymbolRenderContext &context, QPointF shift ) const
 {
-  Q_UNUSED( layerName );
-  Q_UNUSED( shift ); //todo...
-
   //size
   double size = mSize;
 
@@ -2386,8 +2383,6 @@ bool QgsSvgMarkerSymbolLayer::writeDxf( QgsDxfExport &e, double mmMapUnitScaleFa
     size *= mmMapUnitScaleFactor;
   }
 
-  double halfSize = size / 2.0;
-
   //offset, angle
   QPointF offset = mOffset;
 
@@ -2409,7 +2404,7 @@ bool QgsSvgMarkerSymbolLayer::writeDxf( QgsDxfExport &e, double mmMapUnitScaleFa
     context.setOriginalValueVariable( mAngle );
     angle = mDataDefinedProperties.valueAsDouble( QgsSymbolLayer::PropertyAngle, context.renderContext().expressionContext(), mAngle ) + mLineAngle;
   }
-  //angle = -angle; //rotation in Qt is counterclockwise
+
   if ( angle )
     outputOffset = _rotatedOffset( outputOffset, angle );
 
@@ -2448,18 +2443,16 @@ bool QgsSvgMarkerSymbolLayer::writeDxf( QgsDxfExport &e, double mmMapUnitScaleFa
   const QByteArray &svgContent = QgsApplication::svgCache()->svgContent( path, size, fillColor, strokeColor, strokeWidth,
                                  context.renderContext().scaleFactor(), mFixedAspectRatio );
 
-  //if current entry image is 0: cache image for entry
-  // checks to see if image will fit into cache
-  //update stats for memory usage
   QSvgRenderer r( svgContent );
   if ( !r.isValid() )
-  {
     return false;
-  }
 
   QgsDxfPaintDevice pd( &e );
   pd.setDrawingSize( QSizeF( r.defaultSize() ) );
 
+  QSizeF outSize( r.defaultSize() );
+  outSize.scale( size, size, Qt::KeepAspectRatio );
+
   QPainter p;
   p.begin( &pd );
   if ( !qgsDoubleNear( angle, 0.0 ) )
@@ -2469,7 +2462,7 @@ bool QgsSvgMarkerSymbolLayer::writeDxf( QgsDxfExport &e, double mmMapUnitScaleFa
     p.translate( -r.defaultSize().width() / 2.0, -r.defaultSize().height() / 2.0 );
   }
   pd.setShift( shift + QPointF( outputOffset.x(), -outputOffset.y() ) );
-  pd.setOutputSize( QRectF( -halfSize, -halfSize, size, size ) );
+  pd.setOutputSize( QRectF( -outSize.width() / 2.0, -outSize.height() / 2.0, outSize.width(), outSize.height() ) );
   pd.setLayer( layerName );
   r.render( &p );
   p.end();