Support subpixel values for text-shadow and box-shadow

Source/core/rendering/InlineTextBox.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *
  * 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.
  *
@@ skipping 1089 matching lines @@
 
     // Use a special function for underlines to get the positioning exactly right.
     bool isPrinting = textRenderer()->document()->printing();
     context->setStrokeThickness(textDecorationThickness);
 
     bool linesAreOpaque = !isPrinting && (!(deco & TextDecorationUnderline) || underline.alpha() == 255) && (!(deco & TextDecorationOverline) || overline.alpha() == 255) && (!(deco & TextDecorationLineThrough) || linethrough.alpha() == 255);
 
     RenderStyle* styleToUse = renderer()->style(isFirstLineStyle());
     int baseline = styleToUse->fontMetrics().ascent();
 
-    int extraOffset = 0;
+    LayoutUnit extraOffset = 0;
     if (!linesAreOpaque && shadow && shadow->next()) {
         FloatRect clipRect(localOrigin, FloatSize(width, baseline + 2));
         for (const ShadowData* s = shadow; s; s = s->next()) {
             FloatRect shadowRect(localOrigin, FloatSize(width, baseline + 2));
             shadowRect.inflate(s->blur());
-            int shadowX = isHorizontal() ? s->x() : s->y();
-            int shadowY = isHorizontal() ? s->y() : -s->x();
+            LayoutUnit shadowX = isHorizontal() ? s->x() : s->y();
+            LayoutUnit shadowY = isHorizontal() ? s->y() : -s->x();
             shadowRect.move(shadowX, shadowY);
             clipRect.unite(shadowRect);
-            extraOffset = max(extraOffset, max(0, shadowY) + s->blur());
+            extraOffset = max(extraOffset, max(LayoutUnit(0), shadowY) + s->blur());
         }
         context->clip(clipRect);
         extraOffset += baseline + 2;
         localOrigin.move(0, extraOffset);
     }
 
     do {
         if (shadow) {
             if (!shadow->next()) {
                 // The last set of lines paints normally inside the clip.
                 localOrigin.move(0, -extraOffset);
                 extraOffset = 0;
             }
-            int shadowX = isHorizontal() ? shadow->x() : shadow->y();
-            int shadowY = isHorizontal() ? shadow->y() : -shadow->x();
+            LayoutUnit shadowX = isHorizontal() ? shadow->x() : shadow->y();
+            LayoutUnit shadowY = isHorizontal() ? shadow->y() : -shadow->x();
             context->setShadow(FloatSize(shadowX, shadowY - extraOffset), shadow->blur(),
                 renderer()->resolveColor(shadow->color(), Color::stdShadowColor));
             shadow = shadow->next();
         }
 
         // Offset between lines - always non-zero, so lines never cross each other.
         float doubleOffset = textDecorationThickness + 1.f;
         context->setStrokeStyle(textDecorationStyleToStrokeStyle(decorationStyle));
         if (deco & TextDecorationUnderline) {
             context->setStrokeColor(underline);
@@ skipping 408 matching lines @@
     printedCharacters = fprintf(stderr, "\t%s %p", obj->renderName(), obj);
     const int rendererCharacterOffset = 24;
     for (; printedCharacters < rendererCharacterOffset; printedCharacters++)
         fputc(' ', stderr);
     fprintf(stderr, "(%d,%d) \"%s\"\n", start(), start() + len(), value.utf8().data());
 }
 
 #endif
 
 } // namespace WebCore