// 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/layers/append_quads_data.h"
#include "cc/layers/layer_impl.h"
#include "cc/layers/render_surface_impl.h"
#include "cc/test/fake_impl_task_runner_provider.h"
#include "cc/test/fake_layer_tree_frame_sink.h"
#include "cc/test/fake_layer_tree_host_impl.h"
#include "cc/test/fake_picture_layer_impl.h"
#include "cc/test/geometry_test_utils.h"
#include "cc/test/layer_test_common.h"
#include "cc/test/mock_occlusion_tracker.h"
#include "cc/test/test_task_graph_runner.h"
#include "cc/trees/layer_tree_impl.h"
#include "cc/trees/single_thread_proxy.h"
#include "components/viz/common/quads/shared_quad_state.h"
#include "components/viz/common/quads/tile_draw_quad.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/gfx/transform.h"

namespace cc {
namespace {

#define EXECUTE_AND_VERIFY_SURFACE_CHANGED(code_to_test) \
  render_surface->ResetPropertyChangedFlags();           \
  code_to_test;                                          \
  EXPECT_TRUE(render_surface->SurfacePropertyChanged())

#define EXECUTE_AND_VERIFY_SURFACE_DID_NOT_CHANGE(code_to_test) \
  render_surface->ResetPropertyChangedFlags();                  \
  code_to_test;                                                 \
  EXPECT_FALSE(render_surface->SurfacePropertyChanged())

// The AppendQuads method of this class generates multiple quads and one of them
// does not intersect with visible_layer_rect.
class FakePictureLayerImplForRenderSurfaceTest : public FakePictureLayerImpl {
 public:
  static std::unique_ptr<FakePictureLayerImplForRenderSurfaceTest> CreateMask(
      LayerTreeImpl* tree_impl,
      int id) {
    return base::WrapUnique(
        new FakePictureLayerImplForRenderSurfaceTest(tree_impl, id));
  }

  std::unique_ptr<LayerImpl> CreateLayerImpl(
      LayerTreeImpl* tree_impl) override {
    return base::WrapUnique(
        new FakePictureLayerImplForRenderSurfaceTest(tree_impl, id()));
  }

  void SetQuadRectsForTesting(std::vector<gfx::Rect> quad_rects) {
    quad_rects_ = quad_rects;
  }

  bool HasValidTilePriorities() const override { return false; }

  void AppendQuads(viz::RenderPass* render_pass,
                   AppendQuadsData* append_quads_data) override {
    viz::SharedQuadState* shared_quad_state =
        render_pass->CreateAndAppendSharedQuadState();
    float max_contents_scale = 1.f;
    PopulateScaledSharedQuadState(shared_quad_state, max_contents_scale,
                                  max_contents_scale, contents_opaque());
    bool needs_blending = false;
    for (const auto& rect : quad_rects_) {
      auto* quad = render_pass->CreateAndAppendDrawQuad<viz::TileDrawQuad>();
      quad->SetNew(shared_quad_state, rect, rect, needs_blending, 0,
                   gfx::RectF(rect), bounds(), false, false, false);
    }
  }

 protected:
  FakePictureLayerImplForRenderSurfaceTest(LayerTreeImpl* tree_impl, int id)
      : FakePictureLayerImpl(tree_impl,
                             id,
                             Layer::LayerMaskType::MULTI_TEXTURE_MASK) {}

  std::vector<gfx::Rect> quad_rects_;
};

TEST(RenderSurfaceTest, VerifySurfaceChangesAreTrackedProperly) {
  //
  // This test checks that SurfacePropertyChanged() has the correct behavior.
  //

  FakeImplTaskRunnerProvider task_runner_provider;
  TestTaskGraphRunner task_graph_runner;
  std::unique_ptr<LayerTreeFrameSink> layer_tree_frame_sink =
      FakeLayerTreeFrameSink::Create3d();
  FakeLayerTreeHostImpl host_impl(&task_runner_provider, &task_graph_runner);
  std::unique_ptr<LayerImpl> owning_layer =
      LayerImpl::Create(host_impl.active_tree(), 1);
  owning_layer->test_properties()->force_render_surface = true;
  gfx::Rect test_rect(3, 4, 5, 6);
  host_impl.active_tree()->ResetAllChangeTracking();
  host_impl.active_tree()->SetRootLayerForTesting(std::move(owning_layer));
  host_impl.SetVisible(true);
  host_impl.InitializeRenderer(layer_tree_frame_sink.get());
  host_impl.active_tree()->BuildLayerListAndPropertyTreesForTesting();
  host_impl.active_tree()->UpdateDrawProperties();

  RenderSurfaceImpl* render_surface =
      GetRenderSurface(host_impl.active_tree()->root_layer_for_testing());
  ASSERT_TRUE(render_surface);

  // Currently, the content_rect, clip_rect, and
  // owning_layer->layerPropertyChanged() are the only sources of change.
  EXECUTE_AND_VERIFY_SURFACE_CHANGED(render_surface->SetClipRect(test_rect));
  EXECUTE_AND_VERIFY_SURFACE_CHANGED(
      render_surface->SetContentRectForTesting(test_rect));

  host_impl.active_tree()->SetOpacityMutated(
      host_impl.active_tree()->root_layer_for_testing()->element_id(), 0.5f);
  EXPECT_TRUE(render_surface->SurfacePropertyChanged());
  host_impl.active_tree()->ResetAllChangeTracking();

  // Setting the surface properties to the same values again should not be
  // considered "change".
  EXECUTE_AND_VERIFY_SURFACE_DID_NOT_CHANGE(
      render_surface->SetClipRect(test_rect));
  EXECUTE_AND_VERIFY_SURFACE_DID_NOT_CHANGE(
      render_surface->SetContentRectForTesting(test_rect));

  std::unique_ptr<LayerImpl> dummy_mask =
      LayerImpl::Create(host_impl.active_tree(), 2);
  gfx::Transform dummy_matrix;
  dummy_matrix.Translate(1.0, 2.0);

  // The rest of the surface properties are either internal and should not cause
  // change, or they are already accounted for by the
  // owninglayer->layerPropertyChanged().
  EXECUTE_AND_VERIFY_SURFACE_DID_NOT_CHANGE(
      render_surface->SetDrawOpacity(0.5f));
  EXECUTE_AND_VERIFY_SURFACE_DID_NOT_CHANGE(
      render_surface->SetDrawTransform(dummy_matrix));
}

TEST(RenderSurfaceTest, SanityCheckSurfaceCreatesCorrectSharedQuadState) {
  FakeImplTaskRunnerProvider task_runner_provider;
  TestTaskGraphRunner task_graph_runner;
  std::unique_ptr<LayerTreeFrameSink> layer_tree_frame_sink =
      FakeLayerTreeFrameSink::Create3d();
  FakeLayerTreeHostImpl host_impl(&task_runner_provider, &task_graph_runner);
  std::unique_ptr<LayerImpl> root_layer =
      LayerImpl::Create(host_impl.active_tree(), 1);

  int owning_layer_id = 2;
  std::unique_ptr<LayerImpl> owning_layer =
      LayerImpl::Create(host_impl.active_tree(), owning_layer_id);
  owning_layer->test_properties()->force_render_surface = true;

  SkBlendMode blend_mode = SkBlendMode::kSoftLight;
  owning_layer->test_properties()->blend_mode = blend_mode;

  root_layer->test_properties()->AddChild(std::move(owning_layer));
  host_impl.active_tree()->SetRootLayerForTesting(std::move(root_layer));
  host_impl.SetVisible(true);
  host_impl.InitializeRenderer(layer_tree_frame_sink.get());
  host_impl.active_tree()->BuildLayerListAndPropertyTreesForTesting();
  host_impl.active_tree()->UpdateDrawProperties();

  ASSERT_TRUE(
      GetRenderSurface(host_impl.active_tree()->LayerById(owning_layer_id)));
  RenderSurfaceImpl* render_surface =
      GetRenderSurface(host_impl.active_tree()->LayerById(owning_layer_id));

  gfx::Rect content_rect(0, 0, 50, 50);
  gfx::Rect clip_rect(5, 5, 40, 40);
  gfx::Transform origin;
  origin.Translate(30, 40);

  render_surface->SetContentRectForTesting(content_rect);
  render_surface->SetClipRect(clip_rect);
  render_surface->SetDrawOpacity(1.f);
  render_surface->SetDrawTransform(origin);

  std::unique_ptr<viz::RenderPass> render_pass = viz::RenderPass::Create();
  AppendQuadsData append_quads_data;

  render_surface->AppendQuads(DRAW_MODE_HARDWARE, render_pass.get(),
                              &append_quads_data);

  ASSERT_EQ(1u, render_pass->shared_quad_state_list.size());
  viz::SharedQuadState* shared_quad_state =
      render_pass->shared_quad_state_list.front();

  EXPECT_EQ(
      30.0,
      shared_quad_state->quad_to_target_transform.matrix().getDouble(0, 3));
  EXPECT_EQ(
      40.0,
      shared_quad_state->quad_to_target_transform.matrix().getDouble(1, 3));
  EXPECT_EQ(content_rect,
            gfx::Rect(shared_quad_state->visible_quad_layer_rect));
  EXPECT_EQ(1.f, shared_quad_state->opacity);
  EXPECT_EQ(blend_mode, shared_quad_state->blend_mode);
}

TEST(RenderSurfaceTest, SanityCheckSurfaceCreatesCorrectRenderPass) {
  FakeImplTaskRunnerProvider task_runner_provider;
  TestTaskGraphRunner task_graph_runner;
  std::unique_ptr<LayerTreeFrameSink> layer_tree_frame_sink =
      FakeLayerTreeFrameSink::Create3d();
  FakeLayerTreeHostImpl host_impl(&task_runner_provider, &task_graph_runner);
  std::unique_ptr<LayerImpl> root_layer =
      LayerImpl::Create(host_impl.active_tree(), 1);

  int owning_layer_id = 2;
  std::unique_ptr<LayerImpl> owning_layer =
      LayerImpl::Create(host_impl.active_tree(), owning_layer_id);
  owning_layer->test_properties()->force_render_surface = true;

  root_layer->test_properties()->AddChild(std::move(owning_layer));
  host_impl.active_tree()->SetRootLayerForTesting(std::move(root_layer));
  host_impl.SetVisible(true);
  host_impl.InitializeRenderer(layer_tree_frame_sink.get());
  host_impl.active_tree()->BuildLayerListAndPropertyTreesForTesting();
  host_impl.active_tree()->UpdateDrawProperties();

  ASSERT_TRUE(
      GetRenderSurface(host_impl.active_tree()->LayerById(owning_layer_id)));
  RenderSurfaceImpl* render_surface =
      GetRenderSurface(host_impl.active_tree()->LayerById(owning_layer_id));

  gfx::Rect content_rect(0, 0, 50, 50);
  gfx::Transform origin;
  origin.Translate(30.0, 40.0);

  render_surface->SetScreenSpaceTransform(origin);
  render_surface->SetContentRectForTesting(content_rect);

  auto pass = render_surface->CreateRenderPass();

  EXPECT_EQ(2u, pass->id);
  EXPECT_EQ(content_rect, pass->output_rect);
  EXPECT_EQ(origin, pass->transform_to_root_target);
}

TEST(RenderSurfaceTest, SanityCheckSurfaceDropsOccludedRenderPassDrawQuads) {
  FakeImplTaskRunnerProvider task_runner_provider;
  TestTaskGraphRunner task_graph_runner;
  std::unique_ptr<LayerTreeFrameSink> layer_tree_frame_sink =
      FakeLayerTreeFrameSink::Create3d();
  FakeLayerTreeHostImpl host_impl(&task_runner_provider, &task_graph_runner);

  std::unique_ptr<LayerImpl> root_layer =
      LayerImpl::Create(host_impl.active_tree(), 1);

  int owning_layer_id = 2;
  std::unique_ptr<LayerImpl> owning_layer =
      LayerImpl::Create(host_impl.active_tree(), owning_layer_id);

  int mask_layer_id = 3;
  std::unique_ptr<FakePictureLayerImplForRenderSurfaceTest> mask_layer =
      FakePictureLayerImplForRenderSurfaceTest::CreateMask(
          host_impl.active_tree(), mask_layer_id);
  mask_layer->SetBounds(gfx::Size(200, 100));
  mask_layer->SetDrawsContent(true);
  std::vector<gfx::Rect> quad_rects;
  quad_rects.push_back(gfx::Rect(0, 0, 100, 100));
  quad_rects.push_back(gfx::Rect(100, 0, 100, 100));
  mask_layer->SetQuadRectsForTesting(quad_rects);

  owning_layer->SetBounds(gfx::Size(200, 100));
  owning_layer->SetDrawsContent(true);
  owning_layer->test_properties()->SetMaskLayer(std::move(mask_layer));
  root_layer->test_properties()->AddChild(std::move(owning_layer));
  host_impl.active_tree()->SetRootLayerForTesting(std::move(root_layer));
  host_impl.SetVisible(true);
  host_impl.InitializeRenderer(layer_tree_frame_sink.get());
  host_impl.active_tree()->BuildLayerListAndPropertyTreesForTesting();
  host_impl.active_tree()->UpdateDrawProperties();

  ASSERT_TRUE(
      GetRenderSurface(host_impl.active_tree()->LayerById(owning_layer_id)));
  RenderSurfaceImpl* render_surface =
      GetRenderSurface(host_impl.active_tree()->LayerById(owning_layer_id));

  gfx::Rect content_rect(0, 0, 200, 100);
  gfx::Rect occluded(0, 0, 100, 100);

  render_surface->SetContentRectForTesting(content_rect);
  render_surface->set_occlusion_in_content_space(
      Occlusion(gfx::Transform(), SimpleEnclosedRegion(occluded),
                SimpleEnclosedRegion(occluded)));

  std::unique_ptr<viz::RenderPass> render_pass = viz::RenderPass::Create();
  AppendQuadsData append_quads_data;

  render_surface->AppendQuads(DRAW_MODE_HARDWARE, render_pass.get(),
                              &append_quads_data);

  ASSERT_EQ(1u, render_pass->shared_quad_state_list.size());
  viz::SharedQuadState* shared_quad_state =
      render_pass->shared_quad_state_list.front();

  EXPECT_EQ(content_rect,
            gfx::Rect(shared_quad_state->visible_quad_layer_rect));

  // The quad (0, 0, 100, 100) is occluded and should be dropped.
  ASSERT_EQ(1u, render_pass->quad_list.size());
  EXPECT_EQ(gfx::Rect(100, 0, 100, 100).ToString(),
            render_pass->quad_list.front()->rect.ToString());
}

TEST(RenderSurfaceTest, SanityCheckSurfaceIgnoreMaskLayerOcclusion) {
  FakeImplTaskRunnerProvider task_runner_provider;
  TestTaskGraphRunner task_graph_runner;
  std::unique_ptr<LayerTreeFrameSink> layer_tree_frame_sink =
      FakeLayerTreeFrameSink::Create3d();
  FakeLayerTreeHostImpl host_impl(&task_runner_provider, &task_graph_runner);

  std::unique_ptr<LayerImpl> root_layer =
      LayerImpl::Create(host_impl.active_tree(), 1);

  int owning_layer_id = 2;
  std::unique_ptr<LayerImpl> owning_layer =
      LayerImpl::Create(host_impl.active_tree(), owning_layer_id);

  int mask_layer_id = 3;
  std::unique_ptr<FakePictureLayerImplForRenderSurfaceTest> mask_layer =
      FakePictureLayerImplForRenderSurfaceTest::CreateMask(
          host_impl.active_tree(), mask_layer_id);
  mask_layer->SetBounds(gfx::Size(200, 100));
  mask_layer->SetDrawsContent(true);
  std::vector<gfx::Rect> quad_rects;
  quad_rects.push_back(gfx::Rect(0, 0, 100, 100));
  quad_rects.push_back(gfx::Rect(100, 0, 100, 100));
  mask_layer->SetQuadRectsForTesting(quad_rects);

  owning_layer->SetBounds(gfx::Size(200, 100));
  owning_layer->SetDrawsContent(true);
  owning_layer->test_properties()->SetMaskLayer(std::move(mask_layer));
  root_layer->test_properties()->AddChild(std::move(owning_layer));
  host_impl.active_tree()->SetRootLayerForTesting(std::move(root_layer));
  host_impl.SetVisible(true);
  host_impl.InitializeRenderer(layer_tree_frame_sink.get());
  host_impl.active_tree()->BuildLayerListAndPropertyTreesForTesting();
  host_impl.active_tree()->UpdateDrawProperties();

  ASSERT_TRUE(
      GetRenderSurface(host_impl.active_tree()->LayerById(owning_layer_id)));
  RenderSurfaceImpl* render_surface =
      GetRenderSurface(host_impl.active_tree()->LayerById(owning_layer_id));

  gfx::Rect content_rect(0, 0, 200, 100);
  gfx::Rect occluded(0, 0, 200, 100);

  render_surface->SetContentRectForTesting(content_rect);
  host_impl.active_tree()
      ->LayerById(mask_layer_id)
      ->draw_properties()
      .occlusion_in_content_space =
      Occlusion(gfx::Transform(), SimpleEnclosedRegion(occluded),
                SimpleEnclosedRegion(occluded));

  std::unique_ptr<viz::RenderPass> render_pass = viz::RenderPass::Create();
  AppendQuadsData append_quads_data;

  render_surface->AppendQuads(DRAW_MODE_HARDWARE, render_pass.get(),
                              &append_quads_data);

  ASSERT_EQ(1u, render_pass->shared_quad_state_list.size());
  viz::SharedQuadState* shared_quad_state =
      render_pass->shared_quad_state_list.front();

  EXPECT_EQ(content_rect,
            gfx::Rect(shared_quad_state->visible_quad_layer_rect));

  // Neither of the two quads should be occluded since mask occlusion is
  // ignored.
  ASSERT_EQ(2u, render_pass->quad_list.size());
  EXPECT_EQ(gfx::Rect(0, 0, 100, 100).ToString(),
            render_pass->quad_list.front()->rect.ToString());
  EXPECT_EQ(gfx::Rect(100, 0, 100, 100).ToString(),
            render_pass->quad_list.back()->rect.ToString());
}

}  // namespace
}  // namespace cc