cc: Fix hit-testing in zero-opacity layers.

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 <algorithm>
 
 #include "base/auto_reset.h"
 #include "base/synchronization/lock.h"
@@ skipping 4903 matching lines @@
   }
   virtual void AfterTest() OVERRIDE {}
 
  private:
   FakeContentLayerClient client_;
   scoped_refptr<FakeContentLayer> root_layer_;
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostTestNoQuadsForEmptyLayer);
 
+class LayerTreeHostTestNoQuadsForZeroOpacity : public LayerTreeHostTest {
+ protected:
+  virtual void SetupTree() OVERRIDE {
+    LayerTreeHostTest::SetupTree();
+    root_layer_ = FakeContentLayer::Create(&client_);
+    root_layer_->SetBounds(gfx::Size(100, 100));
+
+    surface_layer1_ = FakeContentLayer::Create(&client_);
+    surface_layer1_->SetBounds(gfx::Size(100, 100));
+    surface_layer1_->SetForceRenderSurface(true);
+    surface_layer1_->SetOpacity(0.f);
+
+    surface_layer2_ = FakeContentLayer::Create(&client_);
+    surface_layer2_->SetBounds(gfx::Size(50, 50));
+    surface_layer2_->SetForceRenderSurface(true);
+
+    touch_handler_ = FakeContentLayer::Create(&client_);
+    touch_handler_->SetBounds(gfx::Size(50, 50));
+    touch_handler_->SetPosition(gfx::Point(50, 0));
+    touch_handler_->SetTouchEventHandlerRegion(gfx::Rect(0, 0, 50, 50));
+
+    surface_layer2_->AddChild(touch_handler_);
+    surface_layer1_->AddChild(surface_layer2_);
+    root_layer_->AddChild(surface_layer1_);
+
+    layer_tree_host()->SetRootLayer(root_layer_);
+    LayerTreeHostTest::SetupTree();
+  }
+
+  virtual void BeginTest() OVERRIDE {
+    PostSetNeedsCommitToMainThread();
+  }
+
+  virtual void DrawLayersOnThread(LayerTreeHostImpl* impl) OVERRIDE {
+    FakeContentLayerImpl* layer_impl =
+          static_cast<FakeContentLayerImpl*>(impl->RootLayer());
+
+    FakeContentLayerImpl* surface_1_impl =
+        static_cast<FakeContentLayerImpl*>(layer_impl->children()[0]);
+    FakeContentLayerImpl* surface_2_impl =
+        static_cast<FakeContentLayerImpl*>(surface_1_impl->children()[0]);
+    EXPECT_EQ(0u, surface_1_impl->append_quads_count());
+    EXPECT_EQ(0u, surface_2_impl->append_quads_count());
+
+    EndTest();
+  }
+
+  virtual void AfterTest() OVERRIDE {}
+
+ private:
+  FakeContentLayerClient client_;
+  scoped_refptr<FakeContentLayer> root_layer_;
+  scoped_refptr<FakeContentLayer> surface_layer1_;
+  scoped_refptr<FakeContentLayer> surface_layer2_;
+  scoped_refptr<FakeContentLayer> touch_handler_;
+};
+
+SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostTestNoQuadsForZeroOpacity);
+
 
 }  // namespace
 
 }  // namespace cc