Support subpixel layout for borders.

third_party/WebKit/Source/core/layout/LayoutTableCell.h

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009, 2013 Apple Inc.
  *               All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 139 matching lines @@
   int logicalHeightFromStyle() const {
     Length height = style()->logicalHeight();
     int styleLogicalHeight = height.isIntrinsicOrAuto()
                                  ? 0
                                  : valueForLength(height, LayoutUnit()).toInt();
 
     // In strict mode, box-sizing: content-box do the right thing and actually
     // add in the border and padding.
     // Call computedCSSPadding* directly to avoid including implicitPadding.
     if (!document().inQuirksMode() &&
-        style()->boxSizing() != EBoxSizing::kBorderBox)
+        style()->boxSizing() != EBoxSizing::kBorderBox) {
       styleLogicalHeight +=
           (computedCSSPaddingBefore() + computedCSSPaddingAfter()).floor() +
-          borderBefore() + borderAfter();
+          (borderBefore() + borderAfter()).floor();
+    }
     return styleLogicalHeight;
   }
 
   int logicalHeightForRowSizing() const {
     // FIXME: This function does too much work, and is very hot during table
     // layout!
     int adjustedLogicalHeight =
         pixelSnappedLogicalHeight() -
         (intrinsicPaddingBefore() + intrinsicPaddingAfter());
     int styleLogicalHeight = logicalHeightFromStyle();
     return max(styleLogicalHeight, adjustedLogicalHeight);
   }
 
   void setCellLogicalWidth(int constrainedLogicalWidth, SubtreeLayoutScope&);
 
-  int borderLeft() const override;
-  int borderRight() const override;
-  int borderTop() const override;
-  int borderBottom() const override;
-  int borderStart() const override;
-  int borderEnd() const override;
-  int borderBefore() const override;
-  int borderAfter() const override;
+  LayoutUnit borderLeft() const override;
+  LayoutUnit borderRight() const override;
+  LayoutUnit borderTop() const override;
+  LayoutUnit borderBottom() const override;
+  LayoutUnit borderStart() const override;
+  LayoutUnit borderEnd() const override;
+  LayoutUnit borderBefore() const override;
+  LayoutUnit borderAfter() const override;
 
   void collectBorderValues(LayoutTable::CollapsedBorderValues&);
   static void sortBorderValues(LayoutTable::CollapsedBorderValues&);
 
   void layout() override;
 
   void paint(const PaintInfo&, const LayoutPoint&) const override;
 
   int cellBaselinePosition() const;
   bool isBaselineAligned() const {
@@ skipping 174 matching lines @@
 
   void updateLogicalWidth() override;
 
   void paintBoxDecorationBackground(const PaintInfo&,
                                     const LayoutPoint&) const override;
   void paintMask(const PaintInfo&, const LayoutPoint&) const override;
 
   LayoutSize offsetFromContainer(const LayoutObject*) const override;
   LayoutRect localVisualRect() const override;
 
-  int borderHalfLeft(bool outer) const;
-  int borderHalfRight(bool outer) const;
-  int borderHalfTop(bool outer) const;
-  int borderHalfBottom(bool outer) const;
+  LayoutUnit borderHalfLeft(bool outer) const;
+  LayoutUnit borderHalfRight(bool outer) const;
+  LayoutUnit borderHalfTop(bool outer) const;
+  LayoutUnit borderHalfBottom(bool outer) const;
 
-  int borderHalfStart(bool outer) const;
-  int borderHalfEnd(bool outer) const;
-  int borderHalfBefore(bool outer) const;
-  int borderHalfAfter(bool outer) const;
+  LayoutUnit borderHalfStart(bool outer) const;
+  LayoutUnit borderHalfEnd(bool outer) const;
+  LayoutUnit borderHalfBefore(bool outer) const;
+  LayoutUnit borderHalfAfter(bool outer) const;
 
   void setIntrinsicPaddingBefore(int p) { m_intrinsicPaddingBefore = p; }
   void setIntrinsicPaddingAfter(int p) { m_intrinsicPaddingAfter = p; }
   void setIntrinsicPadding(int before, int after) {
     setIntrinsicPaddingBefore(before);
     setIntrinsicPaddingAfter(after);
   }
 
   bool hasStartBorderAdjoiningTable() const;
   bool hasEndBorderAdjoiningTable() const;
@@ skipping 70 matching lines @@
   return toLayoutTableCell(firstChild());
 }
 
 inline LayoutTableCell* LayoutTableRow::lastCell() const {
   return toLayoutTableCell(lastChild());
 }
 
 }  // namespace blink
 
 #endif  // LayoutTableCell_h