blink: Add backdrop-filter support

Source/core/style/ComputedStyle.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2011 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 110 matching lines @@
     visual.init();
     m_background.init();
     surround.init();
     rareNonInheritedData.init();
     rareNonInheritedData.access()->m_deprecatedFlexibleBox.init();
     rareNonInheritedData.access()->m_flexibleBox.init();
     rareNonInheritedData.access()->m_multiCol.init();
     rareNonInheritedData.access()->m_transform.init();
     rareNonInheritedData.access()->m_willChange.init();
     rareNonInheritedData.access()->m_filter.init();
+    rareNonInheritedData.access()->m_backdropFilter.init();
     rareNonInheritedData.access()->m_grid.init();
     rareNonInheritedData.access()->m_gridItem.init();
     rareNonInheritedData.access()->m_scrollSnap.init();
     rareInheritedData.init();
     inherited.init();
     m_svgStyle.init();
 }
 
 ALWAYS_INLINE ComputedStyle::ComputedStyle(const ComputedStyle& o)
     : RefCounted<ComputedStyle>()
@@ skipping 586 matching lines @@
 
     if (rareNonInheritedData.get() != other.rareNonInheritedData.get()) {
         if (!transformDataEquivalent(other))
             diff.setTransformChanged();
 
         if (rareNonInheritedData->opacity != other.rareNonInheritedData->opacity)
             diff.setOpacityChanged();
 
         if (rareNonInheritedData->m_filter != other.rareNonInheritedData->m_filter)
             diff.setFilterChanged();
+
+        if (rareNonInheritedData->m_backdropFilter != other.rareNonInheritedData->m_backdropFilter)
+            diff.setBackdropFilterChanged();
     }
 
     if (!diff.needsPaintInvalidation()) {
         if (inherited->color != other.inherited->color
             || inherited->visitedLinkColor != other.inherited->visitedLinkColor
             || inherited_flags.m_textUnderline != other.inherited_flags.m_textUnderline
             || visual->textDecoration != other.visual->textDecoration) {
             diff.setTextOrColorChanged();
         } else if (rareNonInheritedData.get() != other.rareNonInheritedData.get()
             && (rareNonInheritedData->m_textDecorationStyle != other.rareNonInheritedData->m_textDecorationStyle
@@ skipping 928 matching lines @@
 {
     return LayoutTheme::tapHighlightColor();
 }
 
 #if ENABLE(OILPAN)
 const FilterOperations& ComputedStyle::initialFilter()
 {
     DEFINE_STATIC_LOCAL(Persistent<FilterOperationsWrapper>, ops, (FilterOperationsWrapper::create()));
     return ops->operations();
 }
+
+const FilterOperations& ComputedStyle::initialBackdropFilter()
+{
+    DEFINE_STATIC_LOCAL(Persistent<FilterOperationsWrapper>, ops, (FilterOperationsWrapper::create()));
+    return ops->operations();
+}
 #endif
 
 LayoutRectOutsets ComputedStyle::imageOutsets(const NinePieceImage& image) const
 {
     return LayoutRectOutsets(
         NinePieceImage::computeOutset(image.outset().top(), borderTopWidth()),
         NinePieceImage::computeOutset(image.outset().right(), borderRightWidth()),
         NinePieceImage::computeOutset(image.outset().bottom(), borderBottomWidth()),
         NinePieceImage::computeOutset(image.outset().left(), borderLeftWidth()));
 }
@@ skipping 80 matching lines @@
 }
 
 void ComputedStyle::copyChildDependentFlagsFrom(const ComputedStyle& other)
 {
     setEmptyState(other.emptyState());
     if (other.hasExplicitlyInheritedProperties())
         setHasExplicitlyInheritedProperties();
 }
 
 } // namespace blink