Resolve light-source position/direction when updated

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 29 matching lines @@
 }
 
 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)
+bool PointLightSource::setPosition(const FloatPoint3D& position)
 {
-    if (m_position.x() == x)
+    if (m_position == position)
         return false;
-    m_position.setX(x);
+    m_position = position;
     return true;
 }
 
-bool PointLightSource::setY(float y)
-{
-    if (m_position.y() == y)
-        return false;
-    m_position.setY(y);
-    return true;
-}
-
-bool PointLightSource::setZ(float z)
-{
-    if (m_position.z() == z)
-        return false;
-    m_position.setZ(z);
-    return true;
-}
-
 static TextStream& operator<<(TextStream& ts, const FloatPoint3D& p)
 {
     ts << "x=" << p.x() << " y=" << p.y() << " z=" << p.z();
     return ts;
 }
 
 TextStream& PointLightSource::externalRepresentation(TextStream& ts) const
 {
     ts << "[type=POINT-LIGHT] ";
     ts << "[position=\"" << position() << "\"]";
     return ts;
 }
 
 }; // namespace WebCore