cc : Use transform node data to determine which transform wins at commit

cc/trees/layer_tree_host_unittest.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/layer_tree_host.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 986 matching lines @@
   }
 
   void AfterTest() override {}
 
  private:
   scoped_refptr<Layer> root_;
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostTestEffectTreeSync);
 
+class LayerTreeHostTestTransformTreeSync : public LayerTreeHostTest {
+ protected:
+  void SetupTree() override {
+    root_ = Layer::Create();
+    layer_tree_host()->SetRootLayer(root_);
+    LayerTreeHostTest::SetupTree();
+  }
+
+  void BeginTest() override { PostSetNeedsCommitToMainThread(); }
+
+  void DidCommit() override {
+    TransformTree& transform_tree =
+        layer_tree_host()->property_trees()->transform_tree;
+    TransformNode* node = transform_tree.Node(root_->transform_tree_index());
+    gfx::Transform rotate10;
+    rotate10.Rotate(10.f);
+    switch (layer_tree_host()->source_frame_number()) {
+      case 1:
+        node->data.local = rotate10;
+        node->data.is_currently_animating = true;
+        break;
+      case 2:
+        node->data.is_currently_animating = false;
+        break;
+    }
+  }
+
+  void CommitCompleteOnThread(LayerTreeHostImpl* impl) override {
+    TransformTree& transform_tree =
+        impl->sync_tree()->property_trees()->transform_tree;
+    TransformNode* node = transform_tree.Node(
+        impl->sync_tree()->root_layer()->transform_tree_index());
+    gfx::Transform rotate10;
+    rotate10.Rotate(10.f);
+    gfx::Transform rotate20;
+    rotate20.Rotate(20.f);
+    switch (impl->sync_tree()->source_frame_number()) {
+      case 0:
+        impl->sync_tree()->root_layer()->OnTransformAnimated(rotate20);
+        PostSetNeedsCommitToMainThread();
+        break;
+      case 1:
+        EXPECT_EQ(node->data.local, rotate20);
+        impl->sync_tree()->root_layer()->OnTransformAnimated(rotate20);
+        PostSetNeedsCommitToMainThread();
+        break;
+      case 2:
+        EXPECT_EQ(node->data.local, rotate10);
+        EndTest();
+        break;
+    }
+  }
+
+  void AfterTest() override {}
+
+ private:
+  scoped_refptr<Layer> root_;
+};
+
+SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostTestTransformTreeSync);
+
 // Verify damage status is updated even when the transform tree doesn't need
 // to be updated at draw time.
 class LayerTreeHostTestTransformTreeDamageIsUpdated : public LayerTreeHostTest {
  protected:
   void SetupTree() override {
     root_ = Layer::Create();
     child_ = Layer::Create();
     grand_child_ = Layer::Create();
 
     root_->SetBounds(gfx::Size(50, 50));
@@ skipping 5579 matching lines @@
     EndTest();
   }
 
   void AfterTest() override {}
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostTestPaintedDeviceScaleFactor);
 
 }  // namespace
 }  // namespace cc