// Copyright 2013 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/layers/layer.h"

#include "base/thread_task_runner_handle.h"
#include "cc/debug/lap_timer.h"
#include "cc/layers/layer_settings.h"
#include "cc/test/fake_impl_task_runner_provider.h"
#include "cc/test/fake_layer_tree_host.h"
#include "cc/test/fake_layer_tree_host_client.h"
#include "cc/test/fake_layer_tree_host_impl.h"
#include "cc/test/test_task_graph_runner.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/perf/perf_test.h"

namespace cc {
namespace {

static const int kTimeLimitMillis = 3000;
static const int kWarmupRuns = 5;
static const int kTimeCheckInterval = 10;

class LayerPerfTest : public testing::Test {
 public:
  LayerPerfTest()
      : host_impl_(&task_runner_provider_,
                   &shared_bitmap_manager_,
                   &task_graph_runner_),
        fake_client_(FakeLayerTreeHostClient::DIRECT_3D),
        timer_(kWarmupRuns,
               base::TimeDelta::FromMilliseconds(kTimeLimitMillis),
               kTimeCheckInterval) {}

 protected:
  void SetUp() override {
    layer_tree_host_ =
        FakeLayerTreeHost::Create(&fake_client_, &task_graph_runner_);
    layer_tree_host_->InitializeSingleThreaded(
        &fake_client_, base::ThreadTaskRunnerHandle::Get(), nullptr);
  }

  void TearDown() override {
    layer_tree_host_->SetRootLayer(nullptr);
    layer_tree_host_ = nullptr;
  }

  FakeImplTaskRunnerProvider task_runner_provider_;
  TestSharedBitmapManager shared_bitmap_manager_;
  TestTaskGraphRunner task_graph_runner_;
  FakeLayerTreeHostImpl host_impl_;

  FakeLayerTreeHostClient fake_client_;
  scoped_ptr<FakeLayerTreeHost> layer_tree_host_;
  LapTimer timer_;
};

TEST_F(LayerPerfTest, PushPropertiesTo) {
  scoped_refptr<Layer> test_layer = Layer::Create(LayerSettings());
  scoped_ptr<LayerImpl> impl_layer =
      LayerImpl::Create(host_impl_.active_tree(), 1);

  layer_tree_host_->SetRootLayer(test_layer);

  float transform_origin_z = 0;
  bool scrollable = true;
  bool contents_opaque = true;
  bool double_sided = true;
  bool hide_layer_and_subtree = true;
  bool masks_to_bounds = true;

  // Properties changed.
  timer_.Reset();
  do {
    test_layer->SetNeedsDisplayRect(gfx::Rect(5, 5));
    test_layer->SetTransformOrigin(gfx::Point3F(0.f, 0.f, transform_origin_z));
    test_layer->SetContentsOpaque(contents_opaque);
    test_layer->SetDoubleSided(double_sided);
    test_layer->SetHideLayerAndSubtree(hide_layer_and_subtree);
    test_layer->SetMasksToBounds(masks_to_bounds);
    test_layer->SetScrollClipLayerId(scrollable ? test_layer->id()
                                                : Layer::INVALID_ID);
    test_layer->PushPropertiesTo(impl_layer.get());

    transform_origin_z += 0.01f;
    scrollable = !scrollable;
    contents_opaque = !contents_opaque;
    double_sided = !double_sided;
    hide_layer_and_subtree = !hide_layer_and_subtree;
    masks_to_bounds = !masks_to_bounds;

    timer_.NextLap();
  } while (!timer_.HasTimeLimitExpired());

  perf_test::PrintResult("push_properties_to",
                         "",
                         "props_changed",
                         timer_.LapsPerSecond(),
                         "runs/s",
                         true);

  // Properties didn't change.
  timer_.Reset();
  do {
    test_layer->PushPropertiesTo(impl_layer.get());
    timer_.NextLap();
  } while (!timer_.HasTimeLimitExpired());

  perf_test::PrintResult("push_properties_to",
                         "",
                         "props_didnt_change",
                         timer_.LapsPerSecond(),
                         "runs/s",
                         true);
}


}  // namespace
}  // namespace cc