From 71137783ac6927bd0dc02fce1d6e61e6ec027753 Mon Sep 17 00:00:00 2001
From: win7-7 <win7-7@users.noreply.github.com>
Date: Fri, 8 May 2020 15:20:01 +0300
Subject: Issue #1355 - Store the dirty rect on the display list builder rather
 than passing it as a parameter to BuildDisplayList

Also fix build bustage for De-unified layout/xul in nsRootBoxFrame.cpp
---
 layout/base/nsDisplayList.cpp | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

(limited to 'layout/base/nsDisplayList.cpp')

diff --git a/layout/base/nsDisplayList.cpp b/layout/base/nsDisplayList.cpp
index 8a34d108f..b08fe4219 100644
--- a/layout/base/nsDisplayList.cpp
+++ b/layout/base/nsDisplayList.cpp
@@ -864,10 +864,9 @@ nsDisplayListBuilder::FindAnimatedGeometryRootFor(nsDisplayItem* aItem)
 
 
 void nsDisplayListBuilder::MarkOutOfFlowFrameForDisplay(nsIFrame* aDirtyFrame,
-                                                        nsIFrame* aFrame,
-                                                        const nsRect& aDirtyRect)
+                                                        nsIFrame* aFrame)
 {
-  nsRect dirtyRectRelativeToDirtyFrame = aDirtyRect;
+  nsRect dirtyRectRelativeToDirtyFrame = GetDirtyRect();
   if (nsLayoutUtils::IsFixedPosFrameInDisplayPort(aFrame) &&
       IsPaintingToWindow()) {
     NS_ASSERTION(aDirtyFrame == aFrame->GetParent(), "Dirty frame should be viewport frame");
@@ -882,7 +881,9 @@ void nsDisplayListBuilder::MarkOutOfFlowFrameForDisplay(nsIFrame* aDirtyFrame,
       dirtyRectRelativeToDirtyFrame.SizeTo(aDirtyFrame->GetSize());
     }
   }
-  nsRect dirty = dirtyRectRelativeToDirtyFrame - aFrame->GetOffsetTo(aDirtyFrame);
+
+  nsPoint offset = aFrame->GetOffsetTo(aDirtyFrame);
+  nsRect dirty = dirtyRectRelativeToDirtyFrame - offset;
   nsRect overflowRect = aFrame->GetVisualOverflowRect();
 
   if (aFrame->IsTransformed() &&
@@ -1094,8 +1095,7 @@ nsDisplayListBuilder::ResetMarkedFramesForDisplayList()
 
 void
 nsDisplayListBuilder::MarkFramesForDisplayList(nsIFrame* aDirtyFrame,
-                                               const nsFrameList& aFrames,
-                                               const nsRect& aDirtyRect) {
+                                               const nsFrameList& aFrames) {
   for (nsIFrame* e : aFrames) {
     // Skip the AccessibleCaret frame when building no caret.
     if (!IsBuildingCaret()) {
@@ -1107,9 +1107,8 @@ nsDisplayListBuilder::MarkFramesForDisplayList(nsIFrame* aDirtyFrame,
         }
       }
     }
-    
     mFramesMarkedForDisplay.AppendElement(e);
-    MarkOutOfFlowFrameForDisplay(aDirtyFrame, e, aDirtyRect);
+    MarkOutOfFlowFrameForDisplay(aDirtyFrame, e);
   }
 }
 
@@ -2626,7 +2625,6 @@ SpecialCutoutRegionCase(nsDisplayListBuilder* aBuilder,
   return true;
 }
 
-
 /*static*/ bool
 nsDisplayBackgroundImage::AppendBackgroundItemsToTop(nsDisplayListBuilder* aBuilder,
                                                      nsIFrame* aFrame,
-- 
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