cc: BlockingTaskRunner without MessageLoopProxy

cc/trees/layer_tree_host_unittest_no_message_loop.cc

+// Copyright 2014 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 "base/message_loop/message_loop_proxy.h"
+#include "base/threading/simple_thread.h"
+#include "cc/layers/delegated_renderer_layer.h"
+#include "cc/layers/layer.h"
+#include "cc/layers/solid_color_layer.h"
+#include "cc/output/output_surface.h"
+#include "cc/output/output_surface_client.h"
+#include "cc/test/test_context_provider.h"
+#include "cc/trees/layer_tree_host.h"
+#include "cc/trees/layer_tree_host_client.h"
+#include "cc/trees/layer_tree_host_single_thread_client.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/skia/include/core/SkColor.h"
+#include "ui/gfx/frame_time.h"
+
+namespace cc {
+namespace {
+
+class NoMessageLoopOutputSurface : public OutputSurface {
+ public:
+  NoMessageLoopOutputSurface() : OutputSurface(TestContextProvider::Create()) {}
+  virtual ~NoMessageLoopOutputSurface() {}
+
+  // OutputSurface overrides.
+  virtual void SwapBuffers(CompositorFrame* frame) OVERRIDE {
+    DCHECK(client_);
+    client_->DidSwapBuffers();
+    client_->DidSwapBuffersComplete();
+  }
+};
+
+class LayerTreeHostNoMessageLoopTest : public testing::Test,
+                                       public base::SimpleThread,

[piman, 2014/05/22 20:53:30]

multiple implementation inheritance is unfortunate :(

Use DelegateSimpleThread as a member instead?

[boliu, 2014/05/22 23:17:37]

Done

+                                       public LayerTreeHostClient,
+                                       public LayerTreeHostSingleThreadClient {
+ public:
+  LayerTreeHostNoMessageLoopTest()
+      : base::SimpleThread("LayerTreeHostNoMessageLoopTest"),
+        did_initialize_output_surface_(false),
+        did_commit_(false),
+        did_commit_and_draw_frame_(false) {}
+  virtual ~LayerTreeHostNoMessageLoopTest() {}
+
+  // LayerTreeHostClient overrides.
+  virtual void WillBeginMainFrame(int frame_id) OVERRIDE {}
+  virtual void DidBeginMainFrame() OVERRIDE {}
+  virtual void Animate(base::TimeTicks frame_begin_time) OVERRIDE {}
+  virtual void Layout() OVERRIDE {}
+  virtual void ApplyScrollAndScale(const gfx::Vector2d& scroll_delta,
+                                   float page_scale) OVERRIDE {}
+  virtual scoped_ptr<OutputSurface> CreateOutputSurface(
+      bool fallback) OVERRIDE {
+    return make_scoped_ptr<OutputSurface>(new NoMessageLoopOutputSurface);
+  }
+  virtual void DidInitializeOutputSurface() OVERRIDE {
+    did_initialize_output_surface_ = true;
+  }
+  virtual void WillCommit() OVERRIDE {}
+  virtual void DidCommit() OVERRIDE { did_commit_ = true; }
+  virtual void DidCommitAndDrawFrame() OVERRIDE {
+    did_commit_and_draw_frame_ = true;
+  }
+  virtual void DidCompleteSwapBuffers() OVERRIDE {}
+
+  // LayerTreeHostSingleThreadClient overrides.
+  virtual void ScheduleComposite() OVERRIDE {}
+  virtual void ScheduleAnimation() OVERRIDE {}
+  virtual void DidPostSwapBuffers() OVERRIDE {}
+  virtual void DidAbortSwapBuffers() OVERRIDE {}
+
+  void RunTest() {
+    Start();
+    Join();
+  }
+
+  // base::SimpleThread override.
+  virtual void Run() OVERRIDE {
+    ASSERT_FALSE(base::MessageLoopProxy::current());
+    RunTestWithoutMessageLoop();
+    EXPECT_FALSE(base::MessageLoopProxy::current());
+  }
+
+  virtual void RunTestWithoutMessageLoop() = 0;
+
+ protected:
+  // All member variables accessed only on SimpleThread with no MessageLoop.
+  bool did_initialize_output_surface_;
+  bool did_commit_;
+  bool did_commit_and_draw_frame_;
+};
+
+class LayerTreeHostNoMessageLoopSmokeTest
+    : public LayerTreeHostNoMessageLoopTest {
+  virtual void RunTestWithoutMessageLoop() OVERRIDE {
+    did_initialize_output_surface_ = false;
+    gfx::Size size(100, 100);
+
+    // Set up LayerTreeHost.
+    LayerTreeSettings settings;
+    scoped_ptr<LayerTreeHost> layer_tree_host =
+        LayerTreeHost::CreateSingleThreaded(this, this, NULL, settings);
+    layer_tree_host->SetViewportSize(size);
+
+    // Set up root layer.
+    scoped_refptr<SolidColorLayer> root_layer = SolidColorLayer::Create();
+    root_layer->SetBackgroundColor(SK_ColorRED);
+    root_layer->SetBounds(size);
+    root_layer->SetIsDrawable(true);
+    layer_tree_host->SetRootLayer(root_layer);
+
+    // Composite.
+    did_commit_ = false;
+    did_commit_and_draw_frame_ = false;
+    layer_tree_host->Composite(gfx::FrameTime::Now());
+    EXPECT_TRUE(did_initialize_output_surface_);
+    EXPECT_TRUE(did_commit_);
+    EXPECT_TRUE(did_commit_and_draw_frame_);
+
+    // Explicit teardown to make failures easier to debug.
+    layer_tree_host.reset();
+    root_layer = NULL;
+  }
+};
+
+TEST_F(LayerTreeHostNoMessageLoopSmokeTest, SmokeTest) {
+  RunTest();
+}
+
+}  // namespace
+}  // namespace cc