Mozart: Generalize frame scheduling.

services/gfx/compositor/tests/scheduling_apptest.cc

+// Copyright 2016 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 "mojo/public/cpp/application/application_impl.h"
+#include "mojo/public/cpp/application/application_test_base.h"
+#include "mojo/public/cpp/application/connect.h"
+#include "mojo/public/cpp/bindings/synchronous_interface_ptr.h"
+#include "mojo/public/cpp/system/macros.h"
+#include "mojo/services/gfx/composition/interfaces/compositor.mojom-sync.h"
+#include "mojo/services/gfx/composition/interfaces/scheduling.mojom-sync.h"
+#include "mojo/services/gpu/interfaces/context_provider.mojom.h"
+#include "mojo/services/native_viewport/interfaces/native_viewport.mojom.h"
+
+namespace test {
+
+using SynchronousCompositorPtr =
+    mojo::SynchronousInterfacePtr<mojo::gfx::composition::Compositor>;
+
+using SynchronousFrameSchedulerPtr =
+    mojo::SynchronousInterfacePtr<mojo::gfx::composition::FrameScheduler>;
+
+class SchedulingTest : public mojo::test::ApplicationTestBase {
+ public:
+  SchedulingTest() {}
+
+ protected:
+  void SetUp() override {
+    mojo::test::ApplicationTestBase::SetUp();
+
+    mojo::ConnectToService(shell(), "mojo:native_viewport_service",
+                           GetProxy(&viewport_));
+    auto size = mojo::Size::New();
+    size->width = 320;
+    size->height = 640;
+    auto configuration = mojo::SurfaceConfiguration::New();
+    viewport_->Create(size.Pass(), configuration.Pass(),
+                      [](mojo::ViewportMetricsPtr metrics) {
+
+                      });
+    viewport_->Show();
+
+    mojo::ContextProviderPtr context_provider;
+    viewport_->GetContextProvider(GetProxy(&context_provider));
+
+    mojo::ConnectToService(shell(), "mojo:compositor_service",
+                           mojo::GetSynchronousProxy(&compositor_));
+    compositor_->CreateRenderer(context_provider.Pass(),
+                                mojo::GetProxy(&renderer_), "SchedulingTest");
+  }
+
+  void TestScheduler(SynchronousFrameSchedulerPtr scheduler) {
+    mojo::gfx::composition::FrameInfoPtr frame_info1;
+    ASSERT_TRUE(scheduler->ScheduleFrame(&frame_info1));
+    AssertValidFrameInfo(frame_info1.get());
+
+    mojo::gfx::composition::FrameInfoPtr frame_info2;
+    ASSERT_TRUE(scheduler->ScheduleFrame(&frame_info2));
+    AssertValidFrameInfo(frame_info2.get());
+
+    EXPECT_GT(frame_info2->frame_time, frame_info1->frame_time);
+    EXPECT_GT(frame_info2->presentation_time, frame_info1->presentation_time);
+  }
+
+  void AssertValidFrameInfo(mojo::gfx::composition::FrameInfo* frame_info) {
+    ASSERT_NE(nullptr, frame_info);
+    EXPECT_LT(frame_info->frame_time, MojoGetTimeTicksNow());
+    EXPECT_GT(frame_info->frame_interval, 0u);
+    EXPECT_GT(frame_info->frame_deadline, frame_info->frame_time);
+    EXPECT_GT(frame_info->presentation_time, frame_info->frame_deadline);
+  }
+
+  mojo::NativeViewportPtr viewport_;
+  SynchronousCompositorPtr compositor_;
+  mojo::gfx::composition::RendererPtr renderer_;
+
+ private:
+  MOJO_DISALLOW_COPY_AND_ASSIGN(SchedulingTest);
+};
+
+namespace {
+
+TEST_F(SchedulingTest, RendererScheduler) {
+  SynchronousFrameSchedulerPtr scheduler;
+  renderer_->GetScheduler(mojo::GetSynchronousProxy(&scheduler));
+  TestScheduler(scheduler.Pass());
+}
+
+// Test what happens when a scene is not attached to a renderer.
+// It should still receive scheduled frame updates occasionally albeit
+// at some indeterminate rate (enough to keep the scene from hanging).
+TEST_F(SchedulingTest, OrphanedSceneScheduler) {
+  mojo::gfx::composition::ScenePtr scene;
+  mojo::gfx::composition::SceneTokenPtr scene_token;
+  compositor_->CreateScene(mojo::GetProxy(&scene), "SchedulingTest",
+                           &scene_token);
+
+  SynchronousFrameSchedulerPtr scheduler;
+  scene->GetScheduler(mojo::GetSynchronousProxy(&scheduler));
+  TestScheduler(scheduler.Pass());
+}
+
+// Test what happens when a scene is attached to a renderer.
+// It should receive scheduled frame updates at a rate determined
+// by the renderer.
+TEST_F(SchedulingTest, RootSceneScheduler) {
+  mojo::gfx::composition::ScenePtr scene;
+  mojo::gfx::composition::SceneTokenPtr scene_token;
+  compositor_->CreateScene(mojo::GetProxy(&scene), "SchedulingTest",
+                           &scene_token);
+
+  auto viewport = mojo::Rect::New();
+  viewport->width = 1;
+  viewport->height = 1;
+  renderer_->SetRootScene(scene_token.Pass(),
+                          mojo::gfx::composition::kSceneVersionNone,
+                          viewport.Pass());
+
+  SynchronousFrameSchedulerPtr scheduler;
+  scene->GetScheduler(mojo::GetSynchronousProxy(&scheduler));
+  TestScheduler(scheduler.Pass());
+}
+
+}  // namespace
+}  // namespace mojo