Support subpixel values for text-shadow and box-shadow

Source/core/css/resolver/StyleBuilderConverter.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 118 matching lines @@
     if (value->isPrimitiveValue()) {
         ASSERT(toCSSPrimitiveValue(value)->getValueID() == CSSValueNone);
         return PassRefPtr<ShadowList>();
     }
 
     const CSSValueList* valueList = toCSSValueList(value);
     size_t shadowCount = valueList->length();
     ShadowDataVector shadows;
     for (size_t i = 0; i < shadowCount; ++i) {
         const CSSShadowValue* item = toCSSShadowValue(valueList->item(i));
-        int x = item->x->computeLength<int>(state.cssToLengthConversionData());
-        int y = item->y->computeLength<int>(state.cssToLengthConversionData());
-        int blur = item->blur ? item->blur->computeLength<int>(state.cssToLengthConversionData()) : 0;
-        int spread = item->spread ? item->spread->computeLength<int>(state.cssToLengthConversionData()) : 0;
+        float x = item->x->computeLength<float>(state.cssToLengthConversionData());
+        float y = item->y->computeLength<float>(state.cssToLengthConversionData());
+        float blur = item->blur ? item->blur->computeLength<float>(state.cssToLengthConversionData()) : 0;
+        float spread = item->spread ? item->spread->computeLength<float>(state.cssToLengthConversionData()) : 0;
         ShadowStyle shadowStyle = item->style && item->style->getValueID() == CSSValueInset ? Inset : Normal;
         Color color;
         if (item->color)
             color = state.document().textLinkColors().colorFromPrimitiveValue(item->color.get(), state.style()->color());
         else
             color = state.style()->color();
 
         if (!color.isValid())
             color = Color::transparent;
-        shadows.append(ShadowData(IntPoint(x, y), blur, spread, shadowStyle, color));
+        shadows.append(ShadowData(FloatPoint(x, y), blur, spread, shadowStyle, color));
     }
     return ShadowList::adopt(shadows);
 }
 
 float StyleBuilderConverter::convertSpacing(StyleResolverState& state, CSSValue* value)
 {
     CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
     if (primitiveValue->getValueID() == CSSValueNormal)
         return 0;
     if (state.useSVGZoomRules())
         return primitiveValue->computeLength<float>(state.cssToLengthConversionData().copyWithAdjustedZoom(1));
     return primitiveValue->computeLength<float>(state.cssToLengthConversionData());
 }
 
 SVGLength StyleBuilderConverter::convertSVGLength(StyleResolverState&, CSSValue* value)
 {
     return SVGLength::fromCSSPrimitiveValue(toCSSPrimitiveValue(value));
 }
 
 } // namespace WebCore