Fixed Shadow blur for transparent objects

Source/platform/graphics/GraphicsContextState.cpp

 // Copyright (c) 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "platform/graphics/GraphicsContextState.h"
 
 #include "platform/graphics/skia/SkiaUtils.h"
 
 namespace blink {
@@ skipping 29 matching lines @@
     , m_fillPaint(other.m_fillPaint)
     , m_strokeData(other.m_strokeData)
     , m_strokeColor(other.m_strokeColor)
     , m_strokeGradient(other.m_strokeGradient)
     , m_strokePattern(other.m_strokePattern)
     , m_fillColor(other.m_fillColor)
     , m_fillRule(other.m_fillRule)
     , m_fillGradient(other.m_fillGradient)
     , m_fillPattern(other.m_fillPattern)
     , m_looper(other.m_looper)
+    , m_dropShadowImageFilter(other.m_dropShadowImageFilter)
     , m_textDrawingMode(other.m_textDrawingMode)
     , m_alpha(other.m_alpha)
     , m_colorFilter(other.m_colorFilter)
     , m_compositeOperator(other.m_compositeOperator)
     , m_blendMode(other.m_blendMode)
     , m_interpolationQuality(other.m_interpolationQuality)
     , m_saveCount(0)
     , m_shouldAntialias(other.m_shouldAntialias)
     , m_shouldClampToSourceRect(other.m_shouldClampToSourceRect) { }
 
@@ skipping 137 matching lines @@
     m_fillPaint.setLooper(m_looper.get());
 }
 
 void GraphicsContextState::clearDrawLooper()
 {
     m_looper.clear();
     m_strokePaint.setLooper(0);
     m_fillPaint.setLooper(0);
 }
 
+void GraphicsContextState::setDropShadowImageFilter(PassRefPtr<SkImageFilter> dropShadowImageFilter)
+{
+    m_dropShadowImageFilter = dropShadowImageFilter;
+}
+
+void GraphicsContextState::clearDropShadowImageFilter()
+{
+    m_dropShadowImageFilter.clear();
+}
+
 void GraphicsContextState::setAlphaAsFloat(float alpha)
 {
     if (alpha < 0) {
         m_alpha = 0;
     } else {
         m_alpha = roundf(alpha * 256);
         if (m_alpha > 256)
             m_alpha = 256;
     }
     m_strokePaint.setColor(applyAlpha(m_strokeColor.rgb()));
@@ skipping 30 matching lines @@
 
 void GraphicsContextState::setShouldAntialias(bool shouldAntialias)
 {
     m_shouldAntialias = shouldAntialias;
     m_strokePaint.setAntiAlias(shouldAntialias);
     m_fillPaint.setAntiAlias(shouldAntialias);
 }
 
 
 } // namespace blink