Revert 150342 "Implement filter primitive subregion for referenc..."

trunk/Source/core/platform/graphics/filters/FEDropShadow.cpp

Index: trunk/Source/core/platform/graphics/filters/FEDropShadow.cpp
===================================================================
--- trunk/Source/core/platform/graphics/filters/FEDropShadow.cpp	(revision 150368)
+++ trunk/Source/core/platform/graphics/filters/FEDropShadow.cpp	(working copy)
@@ -57,7 +57,18 @@
     Filter* filter = this->filter();
     ASSERT(filter);
 
-    FloatRect absolutePaintRect = mapRect(inputEffect(0)->absolutePaintRect());
+    FloatRect absolutePaintRect = inputEffect(0)->absolutePaintRect();
+    FloatRect absoluteOffsetPaintRect(absolutePaintRect);
+    absoluteOffsetPaintRect.move(filter->applyHorizontalScale(m_dx), filter->applyVerticalScale(m_dy));
+    absolutePaintRect.unite(absoluteOffsetPaintRect);
+    
+    unsigned kernelSizeX = 0;
+    unsigned kernelSizeY = 0;
+    FEGaussianBlur::calculateKernelSize(filter, kernelSizeX, kernelSizeY, m_stdX, m_stdY);
+    
+    // We take the half kernel size and multiply it with three, because we run box blur three times.
+    absolutePaintRect.inflateX(3 * kernelSizeX * 0.5f);
+    absolutePaintRect.inflateY(3 * kernelSizeY * 0.5f);
 
     if (clipsToBounds())
         absolutePaintRect.intersect(maxEffectRect());
@@ -67,29 +78,6 @@
     setAbsolutePaintRect(enclosingIntRect(absolutePaintRect));
 }
 
-FloatRect FEDropShadow::mapRect(const FloatRect& rect, bool forward)
-{
-    FloatRect result = rect;
-    Filter* filter = this->filter();
-    ASSERT(filter);
-
-    FloatRect offsetRect = rect;
-    if (forward)
-        offsetRect.move(filter->applyHorizontalScale(m_dx), filter->applyVerticalScale(m_dy));
-    else
-        offsetRect.move(-filter->applyHorizontalScale(m_dx), -filter->applyVerticalScale(m_dy));
-    result.unite(offsetRect);
-
-    unsigned kernelSizeX = 0;
-    unsigned kernelSizeY = 0;
-    FEGaussianBlur::calculateKernelSize(filter, kernelSizeX, kernelSizeY, m_stdX, m_stdY);
-
-    // We take the half kernel size and multiply it with three, because we run box blur three times.
-    result.inflateX(3 * kernelSizeX * 0.5f);
-    result.inflateY(3 * kernelSizeY * 0.5f);
-    return result;
-}
-
 void FEDropShadow::applySoftware()
 {
     FilterEffect* in = inputEffect(0);