Move common logic between BoxReflectFilterOperation and FEBoxReflect into BoxReflection.

third_party/WebKit/Source/core/paint/PaintLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 2629 matching lines @@
 
 } // unnamed namespace
 
 FilterOperations PaintLayer::computeFilterOperations(const ComputedStyle& style) const
 {
     FilterOperations filterOperations = style.filter();
     if (RuntimeEnabledFeatures::cssBoxReflectFilterEnabled() && layoutObject()->hasReflection() && layoutObject()->isBox()) {
         // TODO(jbroman): Incorporate the mask image.
         const auto* reflectStyle = style.boxReflect();
         FloatRect frameRect(toLayoutBox(layoutObject())->frameRect());
-        ReflectionDirection direction = VerticalReflection;
+        BoxReflection::ReflectionDirection direction = BoxReflection::VerticalReflection;
         float offset = 0;
         switch (reflectStyle->direction()) {
         case ReflectionAbove:
-            direction = VerticalReflection;
+            direction = BoxReflection::VerticalReflection;
             offset = -floatValueForLength(reflectStyle->offset(), frameRect.height());
             break;
         case ReflectionBelow:
-            direction = VerticalReflection;
+            direction = BoxReflection::VerticalReflection;
             offset = 2 * frameRect.height() + floatValueForLength(reflectStyle->offset(), frameRect.height());
             break;
         case ReflectionLeft:
-            direction = HorizontalReflection;
+            direction = BoxReflection::HorizontalReflection;
             offset = -floatValueForLength(reflectStyle->offset(), frameRect.width());
             break;
         case ReflectionRight:
-            direction = HorizontalReflection;
+            direction = BoxReflection::HorizontalReflection;
             offset = 2 * frameRect.width() + floatValueForLength(reflectStyle->offset(), frameRect.width());
             break;
         }
 
         // Since the filter origin is the corner of the input bounds, which may
         // include visual overflow (e.g. due to box-shadow), we must adjust the
         // offset to also account for this offset (this is equivalent to using
         // SkLocalMatrixImageFilter, but simpler).
         // The rect used here should match the one used in FilterPainter.
         LayoutRect filterInputBounds = physicalBoundingBoxIncludingReflectionAndStackingChildren(LayoutPoint());
-        offset -= 2 * (direction == VerticalReflection ? filterInputBounds.y() : filterInputBounds.x()).toFloat();
+        offset -= 2 * (direction == BoxReflection::VerticalReflection ? filterInputBounds.y() : filterInputBounds.x()).toFloat();
 
-        filterOperations.operations().append(BoxReflectFilterOperation::create(direction, offset));
+        BoxReflection reflection(direction, offset);
+        filterOperations.operations().append(BoxReflectFilterOperation::create(reflection));
     }
     return computeFilterOperationsHandleReferenceFilters(filterOperations, style.effectiveZoom(), enclosingNode());
 }
 
 FilterOperations PaintLayer::computeBackdropFilterOperations(const ComputedStyle& style) const
 {
     return computeFilterOperationsHandleReferenceFilters(style.backdropFilter(), style.effectiveZoom(), enclosingNode());
 }
 
 PaintLayerFilterInfo& PaintLayer::ensureFilterInfo()
@@ skipping 242 matching lines @@
 
 void showLayerTree(const blink::LayoutObject* layoutObject)
 {
     if (!layoutObject) {
         fprintf(stderr, "Cannot showLayerTree. Root is (nil)\n");
         return;
     }
     showLayerTree(layoutObject->enclosingLayer());
 }
 #endif