Support subpixel values for text-shadow and box-shadow

Source/core/rendering/style/ShadowData.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef ShadowData_h
 #define ShadowData_h
 
-#include "platform/geometry/IntPoint.h"
+#include "platform/geometry/FloatPoint.h"
 #include "platform/graphics/Color.h"
 
 namespace WebCore {
 
 enum ShadowStyle { Normal, Inset };
 
 // This class holds information about shadows for the text-shadow and box-shadow properties.
 class ShadowData {
     WTF_MAKE_FAST_ALLOCATED;
 public:
-    ShadowData(const IntPoint& location, int blur, int spread, ShadowStyle style, const Color& color)
+    ShadowData(const FloatPoint& location, float blur, float spread, ShadowStyle style, const Color& color)
         : m_location(location)
         , m_blur(blur)
         , m_spread(spread)
         , m_color(color)
         , m_style(style)
     {
     }
 
     bool operator==(const ShadowData&) const;
     bool operator!=(const ShadowData& o) const { return !(*this == o); }
 
     ShadowData blend(const ShadowData& from, double progress) const;
 
-    int x() const { return m_location.x(); }
-    int y() const { return m_location.y(); }
-    IntPoint location() const { return m_location; }
-    int blur() const { return m_blur; }
-    int spread() const { return m_spread; }
+    float x() const { return m_location.x(); }
+    float y() const { return m_location.y(); }
+    FloatPoint location() const { return m_location; }
+    float blur() const { return m_blur; }
+    float spread() const { return m_spread; }
     ShadowStyle style() const { return m_style; }
     const Color& color() const { return m_color; }
 
 private:
-    IntPoint m_location;
-    int m_blur;
-    int m_spread;
+    FloatPoint m_location;
+    float m_blur;
+    float m_spread;
     Color m_color;
     ShadowStyle m_style;
 };
 
 } // namespace WebCore
 
 #endif // ShadowData_h