Account for perspective and preserve-3d in mapToVisualRectInAncestorSpace

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/layout/PaintInvalidationState.h"
 
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
 #include "core/layout/LayoutInline.h"
@@ skipping 481 matching lines @@
     const LayoutObject& object,
     const LayoutBoxModelObject& ancestor,
     LayoutRect& rect) {
   // TODO(wkorman): The flip below is required because visual rects are
   // currently in "physical coordinates with flipped block-flow direction"
   // (see LayoutBoxModelObject.h) but we need them to be in physical
   // coordinates.
   if (object.isBox())
     toLayoutBox(&object)->flipForWritingMode(rect);
 
-  if (object.isLayoutView())
-    toLayoutView(object).mapToVisualRectInAncestorSpace(
-        &ancestor, rect, InputIsInFrameCoordinates, DefaultVisualRectFlags);
-  else
+  if (object.isLayoutView()) {
+    TransformState transformState(TransformState::ApplyTransformDirection,
+                                  FloatQuad(FloatRect(rect)));
+    toLayoutView(object).mapToVisualRectInAncestorSpaceInternal(
+        &ancestor, transformState, InputIsInFrameCoordinates,
+        DefaultVisualRectFlags);
+    transformState.flatten();
+    rect = LayoutRect(transformState.lastPlanarQuad().boundingBox());
+  } else {
     object.mapToVisualRectInAncestorSpace(&ancestor, rect);
+  }
 }
 
 void PaintInvalidationState::mapLocalRectToPaintInvalidationContainer(
     LayoutRect& rect) const {
 #if DCHECK_IS_ON()
   DCHECK(!m_didUpdateForChildren);
 #endif
 
   if (m_cachedOffsetsEnabled) {
 #ifdef CHECK_FAST_PATH_SLOW_PATH_EQUALITY
@@ skipping 112 matching lines @@
 }
 
 void PaintInvalidatorContextAdapter::mapLocalRectToPaintInvalidationBacking(
     const LayoutObject& object,
     LayoutRect& rect) const {
   DCHECK(&object == &m_paintInvalidationState.currentObject());
   m_paintInvalidationState.mapLocalRectToPaintInvalidationBacking(rect);
 }
 
 }  // namespace blink