Bug 1440177 - Part 5: Don't call GetDisplayItemDataForManager in AddPaintedDisplayItem since we already have it passed in as a parameter. r=jnicol

MozReview-Commit-ID: IHrVPutPSC5

--HG--
extra : rebase_source : c42f425a665a12a8602d9a7cfacdb16b14cf81a2

layout/painting/DisplayItemClip.cpp

@@ -410,7 +410,7 @@ DisplayItemClip::AppendRoundedRects(nsTArray<RoundedRect>* aArray, uint32_t aCou
 }
 
 bool
-DisplayItemClip::ComputeRegionInClips(DisplayItemClip* aOldClip,
+DisplayItemClip::ComputeRegionInClips(const DisplayItemClip* aOldClip,
                                       const nsPoint& aShift,
                                       nsRegion* aCombined) const
 {

layout/painting/DisplayItemClip.h

@@ -121,7 +121,7 @@ public:
    * The result is stored in aCombined. If the result would be infinite
    * (because one or both of the clips does no clipping), returns false.
    */
-  bool ComputeRegionInClips(DisplayItemClip* aOldClip,
+  bool ComputeRegionInClips(const DisplayItemClip* aOldClip,
                             const nsPoint& aShift,
                             nsRegion* aCombined) const;
 

layout/painting/FrameLayerBuilder.cpp

@@ -4852,28 +4852,23 @@ FrameLayerBuilder::AddPaintedDisplayItem(PaintedLayerData* aLayerData,
   nsIntRect intClip;
   bool hasClip = false;
   if (aLayerState != LAYER_NONE) {
-    DisplayItemData *data = GetDisplayItemDataForManager(aItem, layer->Manager());
-    if (data) {
-      tempManager = data->mInactiveManager;
-    }
-    if (!tempManager) {
-      tempManager = new BasicLayerManager(BasicLayerManager::BLM_INACTIVE);
-    }
+    if (aData) {
+      tempManager = aData->mInactiveManager;
 
       // We need to grab these before calling AddLayerDisplayItem because it will overwrite them.
       nsRegion clip;
-    DisplayItemClip* oldClip = nullptr;
-    GetOldLayerFor(aItem, nullptr, &oldClip);
-    hasClip = aClip.ComputeRegionInClips(oldClip,
+      if (aClip.ComputeRegionInClips(&aData->GetClip(),
                                      aTopLeft - paintedData->mLastAnimatedGeometryRootOrigin,
-                                         &clip);
-
-    if (hasClip) {
+                                     &clip)) {
         intClip = clip.GetBounds().ScaleToOutsidePixels(paintedData->mXScale,
                                                         paintedData->mYScale,
                                                         paintedData->mAppUnitsPerDevPixel);
       }
     }
+    if (!tempManager) {
+      tempManager = new BasicLayerManager(BasicLayerManager::BLM_INACTIVE);
+    }
+  }
 
   AddLayerDisplayItem(layer, aItem, aLayerState, tempManager, aData);
 

layout/painting/FrameLayerBuilder.h

@@ -69,6 +69,7 @@ public:
   uint32_t GetDisplayItemKey() { return mDisplayItemKey; }
   layers::Layer* GetLayer() const { return mLayer; }
   nsDisplayItemGeometry* GetGeometry() const { return mGeometry.get(); }
+  const DisplayItemClip& GetClip() const { return mClip; }
   void Invalidate() { mIsInvalid = true; }
   void ClearAnimationCompositorState();