4 files changed, 26 insertions, 25 deletions
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,
diff --git a/layout/base/nsDisplayList.h b/layout/base/nsDisplayList.h
index 9cee7b517..e4fb57e8a 100644
--- a/layout/base/nsDisplayList.h
+++ b/layout/base/nsDisplayList.h
@@ -444,6 +444,10 @@ public:
    * BuildDisplayList on right now).
    */
   const nsRect& GetDirtyRect() { return mDirtyRect; }
+
+  void SetDirtyRect(const nsRect& aDirtyRect) { mDirtyRect = aDirtyRect; }
+  void IntersectDirtyRect(const nsRect& aDirtyRect) { mDirtyRect.IntersectRect(mDirtyRect, aDirtyRect); }
+
   const nsIFrame* GetCurrentFrame() { return mCurrentFrame; }
   const nsIFrame* GetCurrentReferenceFrame() { return mCurrentReferenceFrame; }
   const nsPoint& GetCurrentFrameOffsetToReferenceFrame() { return mCurrentOffsetToReferenceFrame; }
@@ -493,11 +497,10 @@ public:
   /**
    * Display the caret if needed.
    */
-  void DisplayCaret(nsIFrame* aFrame, const nsRect& aDirtyRect,
-                    nsDisplayList* aList) {
+  void DisplayCaret(nsIFrame* aFrame, nsDisplayList* aList) {
     nsIFrame* frame = GetCaretFrame();
     if (aFrame == frame) {
-      frame->DisplayCaret(this, aDirtyRect, aList);
+      frame->DisplayCaret(this, aList);
     }
   }
   /**
@@ -602,8 +605,7 @@ public:
    * destroyed.
    */
   void MarkFramesForDisplayList(nsIFrame* aDirtyFrame,
-                                const nsFrameList& aFrames,
-                                const nsRect& aDirtyRect);
+                                const nsFrameList& aFrames);
   /**
    * Mark all child frames that Preserve3D() as needing display.
    * Because these frames include transforms set on their parent, dirty rects
@@ -700,8 +702,8 @@ public:
   friend class AutoBuildingDisplayList;
   class AutoBuildingDisplayList {
   public:
-    AutoBuildingDisplayList(nsDisplayListBuilder* aBuilder,
-                            nsIFrame* aForChild,
+
+    AutoBuildingDisplayList(nsDisplayListBuilder* aBuilder, nsIFrame* aForChild,
                             const nsRect& aDirtyRect, bool aIsRoot)
       : mBuilder(aBuilder),
         mPrevFrame(aBuilder->mCurrentFrame),
@@ -1120,11 +1122,11 @@ public:
     Preserves3DContext mSavedCtx;
   };
 
-  const nsRect GetPreserves3DDirtyRect(const nsIFrame *aFrame) const {
+  const nsRect GetPreserves3DRects() const {
     return mPreserves3DCtx.mDirtyRect;
   }
-  void SetPreserves3DDirtyRect(const nsRect &aDirtyRect) {
-    mPreserves3DCtx.mDirtyRect = aDirtyRect;
+  void SavePreserves3DRects() {
+    mPreserves3DCtx.mDirtyRect = mDirtyRect;
   }
 
   bool IsBuildingInvisibleItems() const { return mBuildingInvisibleItems; }
@@ -1133,8 +1135,7 @@ public:
   }
 
 private:
-  void MarkOutOfFlowFrameForDisplay(nsIFrame* aDirtyFrame, nsIFrame* aFrame,
-                                    const nsRect& aDirtyRect);
+  void MarkOutOfFlowFrameForDisplay(nsIFrame* aDirtyFrame, nsIFrame* aFrame);
 
   /**
    * Returns whether a frame acts as an animated geometry root, optionally
diff --git a/layout/base/nsLayoutUtils.cpp b/layout/base/nsLayoutUtils.cpp
index 710463a5f..fdcdcac78 100644
--- a/layout/base/nsLayoutUtils.cpp
+++ b/layout/base/nsLayoutUtils.cpp
@@ -3111,7 +3111,8 @@ nsLayoutUtils::GetFramesForArea(nsIFrame* aFrame, const nsRect& aRect,
   }
 
   builder.EnterPresShell(aFrame);
-  aFrame->BuildDisplayListForStackingContext(&builder, aRect, &list);
+  builder.SetDirtyRect(aRect);
+  aFrame->BuildDisplayListForStackingContext(&builder, &list);
   builder.LeavePresShell(aFrame, nullptr);
 
 #ifdef MOZ_DUMP_PAINTING
@@ -3460,7 +3461,8 @@ nsLayoutUtils::PaintFrame(nsRenderingContext* aRenderingContext, nsIFrame* aFram
     PROFILER_LABEL("nsLayoutUtils", "PaintFrame::BuildDisplayList",
       js::ProfileEntry::Category::GRAPHICS);
 
-    aFrame->BuildDisplayListForStackingContext(&builder, dirtyRect, &list);
+    builder.SetDirtyRect(dirtyRect);
+    aFrame->BuildDisplayListForStackingContext(&builder, &list);
   }
 
   nsIAtom* frameType = aFrame->GetType();
diff --git a/layout/base/nsPresShell.cpp b/layout/base/nsPresShell.cpp
index 8b469185f..e8670ff3b 100644
--- a/layout/base/nsPresShell.cpp
+++ b/layout/base/nsPresShell.cpp
@@ -4868,8 +4868,8 @@ PresShell::CreateRangePaintInfo(nsIDOMRange* aRange,
     nsIFrame* frame = aNode->AsContent()->GetPrimaryFrame();
     // XXX deal with frame being null due to display:contents
     for (; frame; frame = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(frame)) {
-      frame->BuildDisplayListForStackingContext(&info->mBuilder,
-               frame->GetVisualOverflowRect(), &info->mList);
+      info->mBuilder.SetDirtyRect(frame->GetVisualOverflowRect());
+      frame->BuildDisplayListForStackingContext(&info->mBuilder, &info->mList);
     }
   };
   if (startParent->NodeType() == nsIDOMNode::TEXT_NODE) {