Bug 1465058 - Update for API change in WR PR 2756. r=kats

MozReview-Commit-ID: 6Vg0bTpBYVh

--HG--
extra : rebase_source : f9b4f5cdb26d268d7804afb827c7710a05bc56d9

gfx/layers/wr/AsyncImagePipelineManager.cpp

@@ -320,18 +320,19 @@ AsyncImagePipelineManager::ApplyAsyncImages(wr::TransactionBuilder& aTxn)
     wr::DisplayListBuilder builder(pipelineId, contentSize);
 
     float opacity = 1.0f;
-    builder.PushStackingContext(wr::ToLayoutRect(pipeline->mScBounds),
-                                nullptr,
-                                nullptr,
-                                &opacity,
-                                pipeline->mScTransform.IsIdentity() ? nullptr : &pipeline->mScTransform,
-                                wr::TransformStyle::Flat,
-                                nullptr,
-                                pipeline->mMixBlendMode,
-                                nsTArray<wr::WrFilterOp>(),
-                                true,
-                                // This is fine to do unconditionally because we only push images here.
-                                wr::GlyphRasterSpace::Screen());
+    Maybe<wr::WrClipId> referenceFrameId = builder.PushStackingContext(
+        wr::ToLayoutRect(pipeline->mScBounds),
+        nullptr,
+        nullptr,
+        &opacity,
+        pipeline->mScTransform.IsIdentity() ? nullptr : &pipeline->mScTransform,
+        wr::TransformStyle::Flat,
+        nullptr,
+        pipeline->mMixBlendMode,
+        nsTArray<wr::WrFilterOp>(),
+        true,
+        // This is fine to do unconditionally because we only push images here.
+        wr::GlyphRasterSpace::Screen());
 
     if (pipeline->mCurrentTexture && !keys.IsEmpty()) {
       LayoutDeviceRect rect(0, 0, pipeline->mCurrentTexture->GetSize().width, pipeline->mCurrentTexture->GetSize().height);
@@ -358,7 +359,7 @@ AsyncImagePipelineManager::ApplyAsyncImages(wr::TransactionBuilder& aTxn)
       }
     }
 
-    builder.PopStackingContext();
+    builder.PopStackingContext(referenceFrameId.isSome());
 
     wr::BuiltDisplayList dl;
     wr::LayoutSize builderContentSize;

gfx/layers/wr/StackingContextHelper.cpp

@@ -85,7 +85,7 @@ StackingContextHelper::StackingContextHelper(const StackingContextHelper& aParen
 StackingContextHelper::~StackingContextHelper()
 {
   if (mBuilder) {
-    mBuilder->PopStackingContext();
+    mBuilder->PopStackingContext(mReferenceFrameId.isSome());
   }
 }
 

gfx/webrender_bindings/WebRenderAPI.cpp

@@ -786,10 +786,10 @@ DisplayListBuilder::PushStackingContext(const wr::LayoutRect& aBounds,
 }
 
 void
-DisplayListBuilder::PopStackingContext()
+DisplayListBuilder::PopStackingContext(bool aIsReferenceFrame)
 {
   WRDL_LOG("PopStackingContext\n", mWrState);
-  wr_dp_pop_stacking_context(mWrState);
+  wr_dp_pop_stacking_context(mWrState, aIsReferenceFrame);
 }
 
 wr::WrClipChainId

gfx/webrender_bindings/WebRenderAPI.h

@@ -290,7 +290,7 @@ public:
           const nsTArray<wr::WrFilterOp>& aFilters,
           bool aIsBackfaceVisible,
           const wr::GlyphRasterSpace& aRasterSpace);
-  void PopStackingContext();
+  void PopStackingContext(bool aIsReferenceFrame);
 
   wr::WrClipChainId DefineClipChain(const Maybe<wr::WrClipChainId>& aParent,
                                     const nsTArray<wr::WrClipId>& aClips);

gfx/webrender_bindings/src/bindings.rs

@@ -1661,32 +1661,47 @@ pub extern "C" fn wr_dp_push_stacking_context(state: &mut WrState,
     };
 
     let mut prim_info = LayoutPrimitiveInfo::new(bounds);
+
+    *out_is_reference_frame = transform_binding.is_some() || perspective.is_some();
+    if *out_is_reference_frame {
+        let ref_frame_id = state.frame_builder
+            .dl_builder
+            .push_reference_frame(&prim_info, transform_binding, perspective);
+        match ref_frame_id {
+            ClipId::Clip(id, pipeline_id) => {
+                assert!(pipeline_id == state.pipeline_id);
+                *out_reference_frame_id = id;
+            },
+            _ => panic!("Pushing a reference frame must produce a ClipId::Clip"),
+        }
+
+        prim_info.rect.origin = LayoutPoint::zero();
+        prim_info.clip_rect.origin = LayoutPoint::zero();
+        state.frame_builder.dl_builder.push_clip_id(ref_frame_id);
+    }
+
     prim_info.is_backface_visible = is_backface_visible;
     prim_info.tag = state.current_tag;
 
-    let ref_frame_id = state.frame_builder
+    state.frame_builder
          .dl_builder
          .push_stacking_context(&prim_info,
                                 clip_node_id,
-                                transform_binding,
                                 transform_style,
-                                perspective,
                                 mix_blend_mode,
                                 filters,
                                 glyph_raster_space);
-    if let Some(ClipId::Clip(id, pipeline_id)) = ref_frame_id {
-        assert!(pipeline_id == state.pipeline_id);
-        *out_is_reference_frame = true;
-        *out_reference_frame_id = id;
-    } else {
-        *out_is_reference_frame = false;
-    }
 }
 
 #[no_mangle]
-pub extern "C" fn wr_dp_pop_stacking_context(state: &mut WrState) {
+pub extern "C" fn wr_dp_pop_stacking_context(state: &mut WrState,
+                                             is_reference_frame: bool) {
     debug_assert!(unsafe { !is_in_render_thread() });
     state.frame_builder.dl_builder.pop_stacking_context();
+    if is_reference_frame {
+        state.frame_builder.dl_builder.pop_clip_id();
+        state.frame_builder.dl_builder.pop_reference_frame();
+    }
 }
 
 #[no_mangle]

gfx/webrender_bindings/webrender_ffi_generated.h

@@ -1145,7 +1145,8 @@ void wr_dp_pop_scroll_layer(WrState *aState)
 WR_FUNC;
 
 WR_INLINE
-void wr_dp_pop_stacking_context(WrState *aState)
+void wr_dp_pop_stacking_context(WrState *aState,
+                                bool aIsReferenceFrame)
 WR_FUNC;
 
 WR_INLINE