Uses copy request to flatten the layers to do screen rotation animation.

ash/rotator/screen_rotation_animator_unittest.cc

Index: ash/rotator/screen_rotation_animator_unittest.cc
diff --git a/ash/rotator/screen_rotation_animator_unittest.cc b/ash/rotator/screen_rotation_animator_unittest.cc
index 1b464c6404a39360b8eaa7605f35361b461710eb..14eb5f20cab3e1e182c5dca43896b2b501b2b2b8 100644
--- a/ash/rotator/screen_rotation_animator_unittest.cc
+++ b/ash/rotator/screen_rotation_animator_unittest.cc
@@ -8,7 +8,11 @@
 #include "ash/rotator/test/screen_rotation_animator_test_api.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
+#include "base/callback_forward.h"
 #include "base/memory/ptr_util.h"
+#include "base/run_loop.h"
+#include "cc/output/copy_output_request.h"
+#include "cc/output/copy_output_result.h"
 #include "ui/compositor/scoped_animation_duration_scale_mode.h"
 #include "ui/display/display.h"
 #include "ui/display/manager/display_manager.h"
@@ -49,6 +53,47 @@ class AnimationObserver : public ScreenRotationAnimatorObserver {
   DISALLOW_COPY_AND_ASSIGN(AnimationObserver);
 };
 
+class ScreenRotationTestAnimator : public ScreenRotationAnimator {
+ public:
+  explicit ScreenRotationTestAnimator(int64_t display_id);
+  ~ScreenRotationTestAnimator() override {}
+
+  void set_callback(const base::Closure& callback) { callback_ = callback; }
+
+ protected:
+  std::unique_ptr<cc::CopyOutputRequest> CreateAfterCopyCallback(
+      std::unique_ptr<ScreenRotationRequest> rotation_request) override;
+
+ private:
+  void OnRootLayerCopiedBeforeRotationForTest(
+      std::unique_ptr<ScreenRotationRequest> rotation_request,
+      std::unique_ptr<cc::CopyOutputResult> result);
+
+  base::Closure callback_;
+  base::WeakPtrFactory<ScreenRotationTestAnimator> weak_factory_test_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScreenRotationTestAnimator);
+};
+
+ScreenRotationTestAnimator::ScreenRotationTestAnimator(int64_t display_id)
+    : ScreenRotationAnimator(display_id), weak_factory_test_(this) {}
+
+void ScreenRotationTestAnimator::OnRootLayerCopiedBeforeRotationForTest(
+    std::unique_ptr<ScreenRotationRequest> rotation_request,
+    std::unique_ptr<cc::CopyOutputResult> result) {
+  callback_.Run();
+  OnRootLayerCopiedBeforeRotation(std::move(rotation_request),
+                                  std::move(result));
+}
+
+std::unique_ptr<cc::CopyOutputRequest>
+ScreenRotationTestAnimator::CreateAfterCopyCallback(
+    std::unique_ptr<ScreenRotationRequest> rotation_request) {
+  return cc::CopyOutputRequest::CreateRequest(base::Bind(
+      &ScreenRotationTestAnimator::OnRootLayerCopiedBeforeRotationForTest,
+      weak_factory_test_.GetWeakPtr(), base::Passed(&rotation_request)));
+}
+
 }  // namespace
 
 class ScreenRotationAnimatorTest : public test::AshTestBase {
@@ -59,30 +104,55 @@ class ScreenRotationAnimatorTest : public test::AshTestBase {
   // AshTestBase:
   void SetUp() override;
 
+  void DoNothingCallback();
+
+  void RemoveSecondaryDisplay(const std::string& specs);
+
  protected:
   int64_t display_id() const { return display_.id(); }
 
-  ScreenRotationAnimator* animator() { return animator_.get(); }
+  ScreenRotationTestAnimator* animator() { return animator_.get(); }
+
+  void SetSecreenRotatioAnimator(int64_t display_id);
 
   test::ScreenRotationAnimatorTestApi* test_api() { return test_api_.get(); }
 
+  void AddSecondaryDisplay(const std::string& specs);
+
+  void WaitForCopyCallback();
+
   std::unique_ptr<ui::ScopedAnimationDurationScaleMode> non_zero_duration_mode_;
+  std::unique_ptr<base::RunLoop> run_loop_;
 
  private:
   display::Display display_;
 
-  std::unique_ptr<ScreenRotationAnimator> animator_;
+  std::unique_ptr<ScreenRotationTestAnimator> animator_;
 
   std::unique_ptr<test::ScreenRotationAnimatorTestApi> test_api_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenRotationAnimatorTest);
 };
 
+void ScreenRotationAnimatorTest::DoNothingCallback() {
+  run_loop_->Quit();
+}
+
+void ScreenRotationAnimatorTest::RemoveSecondaryDisplay(
+    const std::string& specs) {
+  UpdateDisplay(specs);
+  run_loop_->Quit();
+}
+
 void ScreenRotationAnimatorTest::SetUp() {
   AshTestBase::SetUp();
 
   display_ = display::Screen::GetScreen()->GetPrimaryDisplay();
-  animator_ = base::MakeUnique<ScreenRotationAnimator>(display_.id());
+  SetSecreenRotatioAnimator(display_.id());
+}
+
+void ScreenRotationAnimatorTest::SetSecreenRotatioAnimator(int64_t display_id) {
+  animator_ = base::MakeUnique<ScreenRotationTestAnimator>(display_id);
   test_api_ =
       base::MakeUnique<test::ScreenRotationAnimatorTestApi>(animator_.get());
   test_api()->DisableAnimationTimers();
@@ -91,6 +161,15 @@ void ScreenRotationAnimatorTest::SetUp() {
           ui::ScopedAnimationDurationScaleMode::SLOW_DURATION);
 }
 
+void ScreenRotationAnimatorTest::AddSecondaryDisplay(const std::string& specs) {
+  UpdateDisplay(specs);
+}
+
+void ScreenRotationAnimatorTest::WaitForCopyCallback() {
+  run_loop_.reset(new base::RunLoop);
+  run_loop_->Run();
+}
+
 TEST_F(ScreenRotationAnimatorTest, ShouldNotifyObserver) {
   // TODO(wutao): needs GetDisplayInfo http://crbug.com/622480.
   if (WmShell::Get()->IsRunningInMash()) {
@@ -223,4 +302,54 @@ TEST_F(ScreenRotationAnimatorTest, ShouldCompleteAnimations) {
   EXPECT_EQ(display::Display::ROTATE_270, GetDisplayRotation(display_id()));
 }
 
+// Test enable smooth screen rotation code path.
+TEST_F(ScreenRotationAnimatorTest, RotatesToDifferentRotationWithCopyCallback) {
+  // TODO(wutao): needs GetDisplayInfo http://crbug.com/622480.
+  if (WmShell::Get()->IsRunningInMash()) {
+    ASSERT_TRUE(WmShell::Get()->GetDisplayInfo(display_id()).id() !=
+                display_id());
+    return;
+  }
+
+  SetDisplayRotation(display_id(), display::Display::ROTATE_0);
+  animator()->set_callback(base::Bind(
+      &ScreenRotationAnimatorTest::DoNothingCallback, base::Unretained(this)));
+  test_api()->EnableSmoothRotation();
+  animator()->Rotate(display::Display::ROTATE_90,
+                     display::Display::RotationSource::ROTATION_SOURCE_USER);
+  WaitForCopyCallback();
+  EXPECT_TRUE(test_api()->HasActiveAnimations());
+
+  test_api()->CompleteAnimations();
+  EXPECT_FALSE(test_api()->HasActiveAnimations());
+}
+
+// If the external display is removed, it should not crash.
+TEST_F(ScreenRotationAnimatorTest, RemoveSecondaryDisplayAfterCopyCallback) {
+  // TODO(wutao): needs GetDisplayInfo http://crbug.com/622480.
+  if (WmShell::Get()->IsRunningInMash()) {
+    ASSERT_TRUE(WmShell::Get()->GetDisplayInfo(display_id()).id() !=
+                display_id());
+    return;
+  }
+
+  AddSecondaryDisplay("640x480,800x600");
+  EXPECT_EQ(2U, display_manager()->GetNumDisplays());
+
+  const unsigned int primary_display_id =
+      display_manager()->GetDisplayAt(0).id();
+  SetSecreenRotatioAnimator(display_manager()->GetDisplayAt(1).id());
+  animator()->set_callback(
+      base::Bind(&ScreenRotationAnimatorTest::RemoveSecondaryDisplay,
+                 base::Unretained(this), "640x480"));
+  test_api()->EnableSmoothRotation();
+  SetDisplayRotation(display_manager()->GetDisplayAt(1).id(),
+                     display::Display::ROTATE_0);
+  animator()->Rotate(display::Display::ROTATE_90,
+                     display::Display::RotationSource::ROTATION_SOURCE_USER);
+  WaitForCopyCallback();
+  EXPECT_EQ(1U, display_manager()->GetNumDisplays());
+  EXPECT_EQ(primary_display_id, display_manager()->GetDisplayAt(0).id());
+}
+
 }  // namespace ash