RuntimeEnabledFeatures::slimmingPaintOffsetCaching

Source/core/layout/LayoutObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1322 matching lines @@
     fullyInvalidatePaint(paintInvalidationContainer, PaintInvalidationSelection, oldSelectionRect, newSelectionRect);
 }
 
 PaintInvalidationReason LayoutObject::invalidatePaintIfNeeded(PaintInvalidationState& paintInvalidationState, const LayoutBoxModelObject& paintInvalidationContainer)
 {
     LayoutView* v = view();
     if (v->document().printing())
         return PaintInvalidationNone; // Don't invalidate paints if we're printing.
 
     const LayoutRect oldBounds = previousPaintInvalidationRect();
-    const LayoutPoint oldLocation = RuntimeEnabledFeatures::slimmingPaintV2Enabled() ? LayoutPoint() : previousPositionFromPaintInvalidationBacking();
+    const LayoutPoint oldLocation = RuntimeEnabledFeatures::slimmingPaintOffsetCachingEnabled() ? LayoutPoint() : previousPositionFromPaintInvalidationBacking();
     LayoutRect newBounds = boundsRectForPaintInvalidation(&paintInvalidationContainer, &paintInvalidationState);
-    LayoutPoint newLocation = RuntimeEnabledFeatures::slimmingPaintV2Enabled() ? LayoutPoint() : DeprecatedPaintLayer::positionFromPaintInvalidationBacking(this, &paintInvalidationContainer, &paintInvalidationState);
+    LayoutPoint newLocation = RuntimeEnabledFeatures::slimmingPaintOffsetCachingEnabled() ? LayoutPoint() : DeprecatedPaintLayer::positionFromPaintInvalidationBacking(this, &paintInvalidationContainer, &paintInvalidationState);
 
     // Composited scrolling should not be included in the bounds and position tracking, because the graphics layer backing the scroller
     // does not move on scroll.
     if (paintInvalidationContainer.usesCompositedScrolling() && &paintInvalidationContainer != this) {
         LayoutSize inverseOffset(toLayoutBox(&paintInvalidationContainer)->scrolledContentOffset());
         newLocation.move(inverseOffset);
         newBounds.move(inverseOffset);
     }
 
     setPreviousPaintInvalidationRect(newBounds);
-    if (!RuntimeEnabledFeatures::slimmingPaintV2Enabled())
+    if (!RuntimeEnabledFeatures::slimmingPaintOffsetCachingEnabled())
         setPreviousPositionFromPaintInvalidationBacking(newLocation);
 
     PaintInvalidationReason invalidationReason = paintInvalidationReason(paintInvalidationContainer, oldBounds, oldLocation, newBounds, newLocation);
 
     // We need to invalidate the selection before checking for whether we are doing a full invalidation.
     // This is because we need to update the old rect regardless.
     invalidateSelectionIfNeeded(paintInvalidationContainer, invalidationReason);
 
     TRACE_EVENT2(TRACE_DISABLED_BY_DEFAULT("blink.invalidation"), "LayoutObject::invalidatePaintIfNeeded()",
         "object", this->debugName().ascii(),
         "info", jsonObjectForOldAndNewRects(oldBounds, oldLocation, newBounds, newLocation));
 
     bool boxDecorationBackgroundObscured = boxDecorationBackgroundIsKnownToBeObscured();
     if (!isFullPaintInvalidationReason(invalidationReason) && boxDecorationBackgroundObscured != m_bitfields.lastBoxDecorationBackgroundObscured())
         invalidationReason = PaintInvalidationBackgroundObscurationChange;
     m_bitfields.setLastBoxDecorationBackgroundObscured(boxDecorationBackgroundObscured);
 
     if (invalidationReason == PaintInvalidationNone) {
         // TODO(trchen): Currently we don't keep track of paint offset of layout objects.
         // There are corner cases that the display items need to be invalidated for paint offset
         // mutation, but incurs no pixel difference (i.e. bounds stay the same) so no rect-based
         // invalidation is issued. See crbug.com/508383 and crbug.com/515977.
         // This is a workaround to force display items to update paint offset.
-        if (paintInvalidationState.forcedSubtreeInvalidationWithinContainer())
+        if (!RuntimeEnabledFeatures::slimmingPaintOffsetCachingEnabled() && paintInvalidationState.forcedSubtreeInvalidationWithinContainer())
             invalidateDisplayItemClients(paintInvalidationContainer);
 
         return invalidationReason;
     }
 
     invalidateDisplayItemClients(paintInvalidationContainer);
 
     if (invalidationReason == PaintInvalidationIncremental) {
         incrementallyInvalidatePaint(paintInvalidationContainer, oldBounds, newBounds, newLocation);
         return invalidationReason;
@@ skipping 2000 matching lines @@
         const blink::LayoutObject* root = object1;
         while (root->parent())
             root = root->parent();
         root->showLayoutTreeAndMark(object1, "*", object2, "-", 0);
     } else {
         fprintf(stderr, "Cannot showLayoutTree. Root is (nil)\n");
     }
 }
 
 #endif