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

Source/platform/graphics/cpu/arm/filters/FELightingNEON.h

 /*
  * Copyright (C) 2011 University of Szeged
  * Copyright (C) 2011 Zoltan Herczeg
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 133 matching lines @@
         if (spotLightSource->specularExponent() == 1)
             neonData.flags |= FLAG_CONE_EXPONENT_IS_1;
     } else {
         ASSERT(m_lightSource->type() == LS_DISTANT);
         floatArguments.lightX = paintingData.lightVector.x();
         floatArguments.lightY = paintingData.lightVector.y();
         floatArguments.lightZ = paintingData.lightVector.z();
         floatArguments.padding2 = 1;
     }
 
+    floatArguments.lightX *= paintingData.worldScale.x();
+    floatArguments.lightY *= paintingData.worldScale.y();
+    floatArguments.lightZ *= paintingData.worldScale.z();
+    floatArguments.lightX -= paintingData.width();
+    floatArguments.lightY -= paintingData.height();
+
     // Set lighting arguments.
     floatArguments.surfaceScale = data.surfaceScale;
     floatArguments.minusSurfaceScaleDividedByFour = -data.surfaceScale / 4;
     if (m_lightingType == FELighting::DiffuseLighting) {
         floatArguments.diffuseConstant = m_diffuseConstant;
     } else {
         neonData.flags |= FLAG_SPECULAR_LIGHT;
         floatArguments.diffuseConstant = m_specularConstant;
         neonData.specularExponent = getPowerCoefficients(m_specularExponent);
         if (m_specularExponent == 1)
@@ skipping 30 matching lines @@
     }
 
     neonDrawLighting(&neonData);
 }
 
 } // namespace WebCore
 
 #endif // CPU(ARM_NEON) && COMPILER(GCC)
 
 #endif // FELightingNEON_h