Implement -webkit-box-reflect as a filter.

third_party/WebKit/Source/core/layout/LayoutBox.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. 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
@@ skipping 1329 matching lines @@
         return false;
     if (childBox.size().isZero())
         return false;
     if (PaintLayer* childLayer = childBox.layer()) {
         // FIXME: perhaps this could be less conservative?
         if (childLayer->compositingState() != NotComposited)
             return false;
         // FIXME: Deal with z-index.
         if (!childStyle.hasAutoZIndex())
             return false;
-        if (childLayer->hasTransformRelatedProperty() || childLayer->isTransparent() || childLayer->hasFilter())
+        if (childLayer->hasTransformRelatedProperty() || childLayer->isTransparent() || childLayer->hasFilterInducingProperty())
             return false;
         if (childBox.hasOverflowClip() && childStyle.hasBorderRadius())
             return false;
     }
     return true;
 }
 
 bool LayoutBox::foregroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect, unsigned maxDepthToTest) const
 {
     if (!maxDepthToTest)
@@ skipping 649 matching lines @@
     }
 
     if (container->isLayoutView())
         return toLayoutView(container)->mapToVisualRectInAncestorSpace(ancestor, rect, position == FixedPosition ? IsFixed : 0, visualRectFlags);
     else
         return container->mapToVisualRectInAncestorSpace(ancestor, rect, visualRectFlags);
 }
 
 void LayoutBox::inflatePaintInvalidationRectForReflectionAndFilter(LayoutRect& paintInvalidationRect) const
 {
-    if (hasReflection())
+    if (!RuntimeEnabledFeatures::cssBoxReflectFilterEnabled() && hasReflection())
         paintInvalidationRect.unite(reflectedRect(paintInvalidationRect));
 
-    if (layer() && layer()->hasFilter())
+    if (layer() && layer()->hasFilterInducingProperty())
         paintInvalidationRect.expand(layer()->filterOutsets());
 }
 
 void LayoutBox::invalidatePaintForOverhangingFloats(bool)
 {
 }
 
 void LayoutBox::updateLogicalWidth()
 {
     LogicalExtentComputedValues computedValues;
@@ skipping 1827 matching lines @@
     // LayoutBox::incrementallyInvalidatePaint() depends on positionFromPaintInvalidationBacking
     // which is not available when slimmingPaintOffsetCachingEnabled.
     if (RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled() && (style()->hasBoxDecorations() || style()->hasBackground()))
         return PaintInvalidationBorderBoxChange;
 
     // TODO(wangxianzhu): Remove incremental invalidation when we remove rect-based paint invalidation.
     // See another hasNonCompositedScrollbars() callsite above.
     if (hasNonCompositedScrollbars())
         return PaintInvalidationBorderBoxChange;
 
-    if (style()->hasVisualOverflowingEffect() || style()->hasAppearance() || style()->hasFilter() || style()->resize() != RESIZE_NONE)
+    if (style()->hasVisualOverflowingEffect() || style()->hasAppearance() || style()->hasFilterInducingProperty() || style()->resize() != RESIZE_NONE)
         return PaintInvalidationBorderBoxChange;
 
     if (style()->hasBorderRadius()) {
         // If a border-radius exists and width/height is smaller than radius width/height,
         // we need to fully invalidate to cover the changed radius.
         FloatRoundedRect oldRoundedRect = style()->getRoundedBorderFor(LayoutRect(LayoutPoint(0, 0), oldBorderBoxSize));
         FloatRoundedRect newRoundedRect = style()->getRoundedBorderFor(LayoutRect(LayoutPoint(0, 0), newBorderBoxSize));
         if (oldRoundedRect.getRadii() != newRoundedRect.getRadii())
             return PaintInvalidationBorderBoxChange;
     }
@@ skipping 821 matching lines @@
 
 void LayoutBox::clearPercentHeightDescendants()
 {
     for (LayoutObject* curr = slowFirstChild(); curr; curr = curr->nextInPreOrder(this)) {
         if (curr->isBox())
             toLayoutBox(curr)->removeFromPercentHeightContainer();
     }
 }
 
 } // namespace blink