Scaling and offset fix for FELighting (software and skia paths)

Source/platform/graphics/filters/PointLightSource.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2010 Zoltan Herczeg <zherczeg@webkit.org>
  * Copyright (C) 2011 University of Szeged
  * Copyright (C) 2011 Renata Hodovan <reni@webkit.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ skipping 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "platform/graphics/filters/PointLightSource.h"
 
 #include "platform/text/TextStream.h"
 
 namespace WebCore {
 
-void PointLightSource::initPaintingData(PaintingData&)
+void PointLightSource::initPaintingData(PaintingData&) const
 {
 }
 
-void PointLightSource::updatePaintingData(PaintingData& paintingData, int x, int y, float z)
+void PointLightSource::updatePaintingData(PaintingData& paintingData, int x, int y, float z) const
 {
     paintingData.lightVector.setX(m_position.x() - x);
     paintingData.lightVector.setY(m_position.y() - y);
     paintingData.lightVector.setZ(m_position.z() - z);
     paintingData.lightVectorLength = paintingData.lightVector.length();
 }
 
 bool PointLightSource::setX(float x)
 {
     if (m_position.x() == x)
@@ skipping 25 matching lines @@
 }
 
 TextStream& PointLightSource::externalRepresentation(TextStream& ts) const
 {
     ts << "[type=POINT-LIGHT] ";
     ts << "[position=\"" << position() << "\"]";
     return ts;
 }
 
 }; // namespace WebCore