Backed out changeset 22d7763100aa (bug 1391499) for build bustage on Windows at gfx/layers/wr/StackingContextHelper.cpp(105): 'Size': undeclared identifier. r=backout

gfx/layers/wr/StackingContextHelper.cpp

@@ -14,8 +14,6 @@ namespace layers {
 
 StackingContextHelper::StackingContextHelper()
   : mBuilder(nullptr)
-  , mXScale(1.0f)
-  , mYScale(1.0f)
 {
   // mOrigin remains at 0,0
 }
@@ -26,8 +24,6 @@ StackingContextHelper::StackingContextHelper(const StackingContextHelper& aParen
                                              const Maybe<gfx::Matrix4x4>& aTransform,
                                              const nsTArray<wr::WrFilterOp>& aFilters)
   : mBuilder(&aBuilder)
-  , mXScale(1.0f)
-  , mYScale(1.0f)
 {
   wr::LayoutRect scBounds = aParentSC.ToRelativeLayoutRect(aLayer->BoundsForStackingContext());
   Layer* layer = aLayer->GetLayer();
@@ -51,8 +47,6 @@ StackingContextHelper::StackingContextHelper(const StackingContextHelper& aParen
                                              gfx::Matrix4x4* aTransformPtr,
                                              const nsTArray<wr::WrFilterOp>& aFilters)
   : mBuilder(&aBuilder)
-  , mXScale(1.0f)
-  , mYScale(1.0f)
 {
   wr::LayoutRect scBounds = aParentSC.ToRelativeLayoutRect(aLayer->BoundsForStackingContext());
   if (aTransformPtr) {
@@ -83,38 +77,13 @@ StackingContextHelper::StackingContextHelper(const StackingContextHelper& aParen
                                              const nsTArray<wr::WrFilterOp>& aFilters,
                                              const gfx::CompositionOp& aMixBlendMode)
   : mBuilder(&aBuilder)
-  , mXScale(1.0f)
-  , mYScale(1.0f)
 {
   nsRect visibleRect;
-
-  if (aTransformPtr) {
-    mTransform = *aTransformPtr;
-  }
-
   bool is2d = !aTransformPtr || (aTransformPtr->Is2D() && !aPerspectivePtr);
   if (is2d) {
     nsRect itemBounds = aDisplayList->GetClippedBoundsWithRespectToASR(aDisplayListBuilder, aItem->GetActiveScrolledRoot());
     nsRect childrenVisible = aItem->GetVisibleRectForChildren();
     visibleRect = itemBounds.Intersect(childrenVisible);
-
-    // Apply the inherited scale from parent
-    mTransform.PostScale(aParentSC.mXScale, aParentSC.mYScale, 1.0);
-    mTransform.NudgeToIntegersFixedEpsilon();
-
-    Size scale = mTransform.As2D().ScaleFactors(true);
-
-    // Restore the scale to default if the scale is too small
-    if (FuzzyEqualsAdditive(scale.width, 0.0f) ||
-        FuzzyEqualsAdditive(scale.height, 0.0f)) {
-      scale = Size(1.0f, 1.0f);
-    }
-
-    mTransform.PreScale(1.0f/scale.width, 1.0f/scale.height, 1.0);
-
-    // Store the inherited scale if has
-    this->mXScale = scale.width;
-    this->mYScale = scale.height;
   } else {
     visibleRect = aDisplayList->GetBounds(aDisplayListBuilder);
     // The position of bounds are calculated by transform and perspective matrix in 3d case. reset it to (0, 0)
@@ -130,11 +99,14 @@ StackingContextHelper::StackingContextHelper(const StackingContextHelper& aParen
   }
 
   wr::LayoutRect scBounds = aParentSC.ToRelativeLayoutRect(bounds);
+  if (aTransformPtr) {
+    mTransform = *aTransformPtr;
+  }
 
   mBuilder->PushStackingContext(scBounds,
                                 aAnimationsId,
                                 aOpacityPtr,
-                                aTransformPtr ? &mTransform : aTransformPtr,
+                                aTransformPtr,
                                 is2d ? wr::TransformStyle::Flat : wr::TransformStyle::Preserve3D,
                                 aPerspectivePtr,
                                 wr::ToMixBlendMode(aMixBlendMode),
@@ -153,25 +125,13 @@ StackingContextHelper::~StackingContextHelper()
 wr::LayoutRect
 StackingContextHelper::ToRelativeLayoutRect(const LayerRect& aRect) const
 {
-  // Multiply by the scale inherited from ancestors if exits
-  LayerRect aMaybeScaledRect = aRect;
-  if (mXScale != 1.0f || mYScale != 1.0f) {
-    aMaybeScaledRect.Scale(mXScale, mYScale);
-  }
-
-  return wr::ToLayoutRect(aMaybeScaledRect - mOrigin);
+  return wr::ToLayoutRect(aRect - mOrigin);
 }
 
 wr::LayoutRect
 StackingContextHelper::ToRelativeLayoutRect(const LayoutDeviceRect& aRect) const
 {
-  // Multiply by the scale inherited from ancestors if exits
-  LayoutDeviceRect aMaybeScaledRect = aRect;
-  if (mXScale != 1.0f || mYScale != 1.0f) {
-    aMaybeScaledRect.Scale(mXScale, mYScale);
-  }
-
-  return wr::ToLayoutRect(ViewAs<LayerPixel>(aMaybeScaledRect, PixelCastJustification::WebRenderHasUnitResolution) - mOrigin);
+  return wr::ToLayoutRect(ViewAs<LayerPixel>(aRect, PixelCastJustification::WebRenderHasUnitResolution) - mOrigin);
 }
 
 wr::LayoutPoint
@@ -183,13 +143,7 @@ StackingContextHelper::ToRelativeLayoutPoint(const LayerPoint& aPoint) const
 wr::LayoutRect
 StackingContextHelper::ToRelativeLayoutRectRounded(const LayoutDeviceRect& aRect) const
 {
-  // Multiply by the scale inherited from ancestors if exits
-  LayoutDeviceRect aMaybeScaledRect = aRect;
-  if (mXScale != 1.0f || mYScale != 1.0f) {
-    aMaybeScaledRect.Scale(mXScale, mYScale);
-  }
-
-  return wr::ToLayoutRect(RoundedToInt(ViewAs<LayerPixel>(aMaybeScaledRect, PixelCastJustification::WebRenderHasUnitResolution) - mOrigin));
+  return wr::ToLayoutRect(RoundedToInt(ViewAs<LayerPixel>(aRect, PixelCastJustification::WebRenderHasUnitResolution) - mOrigin));
 }
 
 } // namespace layers

gfx/layers/wr/StackingContextHelper.h

@@ -89,9 +89,6 @@ private:
   wr::DisplayListBuilder* mBuilder;
   LayerPoint mOrigin;
   gfx::Matrix4x4 mTransform;
-
-  float mXScale;
-  float mYScale;
 };
 
 } // namespace layers