From e01d1b39efd5d83de53adeb6413a8dcfd2470dc7 Mon Sep 17 00:00:00 2001
From: Jason Simmons <jason-simmons@users.noreply.github.com>
Date: Thu, 23 Feb 2017 16:27:33 -0800
Subject: [PATCH] Adapt the physical model layer for Fuchsia (#3441)

---
 flow/layers/physical_model_layer.cc | 22 ++++++++++++++++++++--
 flow/layers/physical_model_layer.h  |  5 +++++
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/flow/layers/physical_model_layer.cc b/flow/layers/physical_model_layer.cc
index 0392677b5f0..18a6d21fafc 100644
--- a/flow/layers/physical_model_layer.cc
+++ b/flow/layers/physical_model_layer.cc
@@ -6,6 +6,11 @@
 
 #include "third_party/skia/include/utils/SkShadowUtils.h"
 
+#if defined(OS_FUCHSIA)
+#include "apps/mozart/lib/skia/type_converters.h"
+#include "apps/mozart/services/composition/nodes.fidl.h"
+#endif  // defined(OS_FUCHSIA)
+
 namespace flow {
 
 PhysicalModelLayer::PhysicalModelLayer()
@@ -26,10 +31,20 @@ void PhysicalModelLayer::Preroll(PrerollContext* context, const SkMatrix& matrix
   set_paint_bounds(bounds);
 }
 
+#if defined(OS_FUCHSIA)
+
+void PhysicalModelLayer::UpdateScene(SceneUpdateContext& context,
+                                     mozart::Node* container) {
+  context.AddLayerToCurrentPaintTask(this);
+  auto node = mozart::Node::New();
+  node->content_clip = mozart::RectF::From(rrect_.getBounds());
+  UpdateSceneChildrenInsideNode(context, container, std::move(node));
+}
+
+#endif  // defined(OS_FUCHSIA)
+
 void PhysicalModelLayer::Paint(PaintContext& context) {
   TRACE_EVENT0("flutter", "PhysicalModelLayer::Paint");
-  // TODO: need to support this layer on Fuchsia
-  FTL_DCHECK(!needs_system_composite());
 
   SkPath path;
   path.addRRect(rrect_);
@@ -43,6 +58,9 @@ void PhysicalModelLayer::Paint(PaintContext& context) {
                               SK_ColorBLACK);
   }
 
+  if (needs_system_composite())
+    return;
+
   SkPaint paint;
   paint.setColor(SkColorSetA(color_, 0xFF));
   context.canvas.drawPath(path, paint);
diff --git a/flow/layers/physical_model_layer.h b/flow/layers/physical_model_layer.h
index 64b4915818b..3271f79081f 100644
--- a/flow/layers/physical_model_layer.h
+++ b/flow/layers/physical_model_layer.h
@@ -22,6 +22,11 @@ class PhysicalModelLayer : public ContainerLayer {
   void Preroll(PrerollContext* context, const SkMatrix& matrix) override;
   void Paint(PaintContext& context) override;
 
+#if defined(OS_FUCHSIA)
+  void UpdateScene(SceneUpdateContext& context,
+                   mozart::Node* container) override;
+#endif  // defined(OS_FUCHSIA)
+
  private:
   SkRRect rrect_;
   int elevation_;