cc/layers/surface_layer_impl_unittest.cc - chromium/src - Git at Google

 // 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 "cc/layers/surface_layer_impl.h"

 #include <stddef.h>

 #include "cc/layers/append_quads_data.h"
 #include "cc/test/layer_test_common.h"
 #include "cc/trees/layer_tree_host_common.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"

 using testing::UnorderedElementsAre;

 namespace cc {
 namespace {

 static constexpr viz::FrameSinkId kArbitraryFrameSinkId(1, 1);

 TEST(SurfaceLayerImplTest, OcclusionWithDeviceScaleFactor) {
   float device_scale_factor = 1.33f;

   gfx::Size layer_size(512, 512);
   gfx::Size scaled_surface_size(
       gfx::ScaleToCeiledSize(layer_size, device_scale_factor));
   gfx::Size viewport_size(681, 750);

   const viz::LocalSurfaceId kArbitraryLocalSurfaceId(
       9, base::UnguessableToken::Create());

   LayerTestCommon::LayerImplTest impl;

   SurfaceLayerImpl* surface_layer_impl =
       impl.AddChildToRoot<SurfaceLayerImpl>();
   surface_layer_impl->SetBounds(layer_size);
   surface_layer_impl->SetDrawsContent(true);
   viz::SurfaceId surface_id(kArbitraryFrameSinkId, kArbitraryLocalSurfaceId);
   surface_layer_impl->SetPrimarySurfaceInfo(
       viz::SurfaceInfo(surface_id, device_scale_factor, scaled_surface_size));

   RenderSurfaceList render_surface_list;
   LayerTreeHostCommon::CalcDrawPropsImplInputsForTesting inputs(
       impl.root_layer_for_testing(), viewport_size, device_scale_factor,
       &render_surface_list);
   LayerTreeHostCommon::CalculateDrawPropertiesForTesting(&inputs);

   {
     SCOPED_TRACE("No occlusion");
     gfx::Rect occluded;
     impl.AppendQuadsWithOcclusion(surface_layer_impl, occluded);

     LayerTestCommon::VerifyQuadsExactlyCoverRect(
         impl.quad_list(), gfx::Rect(scaled_surface_size));
     EXPECT_EQ(1u, impl.quad_list().size());
   }

   {
     SCOPED_TRACE("Full occlusion");
     gfx::Rect occluded(scaled_surface_size);
     impl.AppendQuadsWithOcclusion(surface_layer_impl, occluded);

     LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(), gfx::Rect());
     EXPECT_EQ(impl.quad_list().size(), 0u);
   }

   {
     SCOPED_TRACE("Partial occlusion");
     gfx::Rect occluded(gfx::ScaleToEnclosingRect(gfx::Rect(200, 0, 312, 512),
                                                  device_scale_factor));
     impl.AppendQuadsWithOcclusion(surface_layer_impl, occluded);

     size_t partially_occluded_count = 0;
     LayerTestCommon::VerifyQuadsAreOccluded(impl.quad_list(), occluded,
                                             &partially_occluded_count);
     // The layer outputs one quad, which is partially occluded.
     EXPECT_EQ(1u, impl.quad_list().size());
     EXPECT_EQ(1u, partially_occluded_count);
   }
   {
     SCOPED_TRACE("No outside occlusion");
     gfx::Rect occluded(gfx::ScaleToEnclosingRect(gfx::Rect(0, 681, 681, 69),
                                                  device_scale_factor));
     impl.AppendQuadsWithOcclusion(surface_layer_impl, occluded);

     LayerTestCommon::VerifyQuadsExactlyCoverRect(
         impl.quad_list(), gfx::Rect(scaled_surface_size));
     EXPECT_EQ(1u, impl.quad_list().size());
   }
 }

 TEST(SurfaceLayerImplTest, Occlusion) {
   gfx::Size layer_size(1000, 1000);
   gfx::Size viewport_size(1000, 1000);
   const viz::LocalSurfaceId kArbitraryLocalSurfaceId(
       9, base::UnguessableToken::Create());

   LayerTestCommon::LayerImplTest impl;

   SurfaceLayerImpl* surface_layer_impl =
       impl.AddChildToRoot<SurfaceLayerImpl>();
   surface_layer_impl->SetBounds(layer_size);
   surface_layer_impl->SetDrawsContent(true);
   viz::SurfaceId surface_id(kArbitraryFrameSinkId, kArbitraryLocalSurfaceId);
   surface_layer_impl->SetPrimarySurfaceInfo(
       viz::SurfaceInfo(surface_id, 1.f, layer_size));

   impl.CalcDrawProps(viewport_size);

   {
     SCOPED_TRACE("No occlusion");
     gfx::Rect occluded;
     impl.AppendQuadsWithOcclusion(surface_layer_impl, occluded);

     LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(),
                                                  gfx::Rect(layer_size));
     EXPECT_EQ(1u, impl.quad_list().size());
   }

   {
     SCOPED_TRACE("Full occlusion");
     gfx::Rect occluded(surface_layer_impl->visible_layer_rect());
     impl.AppendQuadsWithOcclusion(surface_layer_impl, occluded);

     LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(), gfx::Rect());
     EXPECT_EQ(impl.quad_list().size(), 0u);
   }

   {
     SCOPED_TRACE("Partial occlusion");
     gfx::Rect occluded(200, 0, 800, 1000);
     impl.AppendQuadsWithOcclusion(surface_layer_impl, occluded);

     size_t partially_occluded_count = 0;
     LayerTestCommon::VerifyQuadsAreOccluded(
         impl.quad_list(), occluded, &partially_occluded_count);
     // The layer outputs one quad, which is partially occluded.
     EXPECT_EQ(1u, impl.quad_list().size());
     EXPECT_EQ(1u, partially_occluded_count);
   }
 }

 TEST(SurfaceLayerImplTest, SurfaceStretchedToLayerBounds) {
   LayerTestCommon::LayerImplTest impl;
   SurfaceLayerImpl* surface_layer_impl =
       impl.AddChildToRoot<SurfaceLayerImpl>();
   const viz::LocalSurfaceId kArbitraryLocalSurfaceId(
       9, base::UnguessableToken::Create());
   const viz::LocalSurfaceId kArbitraryLocalSurfaceId2(
       10, base::UnguessableToken::Create());

   // Given condition: layer and surface have different size and different
   // aspect ratios.
   gfx::Size layer_size(400, 100);
   gfx::Size surface_size(300, 300);
   gfx::Size viewport_size(1000, 1000);
   float surface_scale = 1.f;
   gfx::Transform target_space_transform(
       surface_layer_impl->draw_properties().target_space_transform);

   // The following code is mimicking the PushPropertiesTo from pending to
   // active tree.
   surface_layer_impl->SetBounds(layer_size);
   surface_layer_impl->SetDrawsContent(true);
   viz::SurfaceId surface_id(kArbitraryFrameSinkId, kArbitraryLocalSurfaceId);
   viz::SurfaceId surface_id2(kArbitraryFrameSinkId, kArbitraryLocalSurfaceId2);
   surface_layer_impl->SetPrimarySurfaceInfo(
       viz::SurfaceInfo(surface_id, surface_scale, surface_size));
   surface_layer_impl->SetFallbackSurfaceId(surface_id2);
   surface_layer_impl->SetStretchContentToFillBounds(true);

   impl.CalcDrawProps(viewport_size);

   std::unique_ptr<viz::RenderPass> render_pass = viz::RenderPass::Create();
   AppendQuadsData data;
   surface_layer_impl->AppendQuads(render_pass.get(), &data);
   EXPECT_THAT(data.activation_dependencies, UnorderedElementsAre(surface_id));

   const auto& quads = render_pass->quad_list;
   ASSERT_EQ(1u, quads.size());
   const viz::SharedQuadState* shared_quad_state =
       quads.front()->shared_quad_state;

   // We expect that the transform for the quad stretches the quad to cover the
   // entire bounds of the layer.
   gfx::Transform expected_transform(target_space_transform);
   float scale_x = static_cast<float>(surface_size.width()) / layer_size.width();
   float scale_y =
       static_cast<float>(surface_size.height()) / layer_size.height();
   expected_transform.Scale(SK_MScalar1 / scale_x, SK_MScalar1 / scale_y);
   EXPECT_EQ(expected_transform, shared_quad_state->quad_to_target_transform);

   // Obtain quad rect in target space by applying SQS->quad_to_target_transform
   // to quad_rect
   gfx::RectF quad_rect(quads.front()->rect);
   gfx::RectF transformed_quad_rect =
       MathUtil::MapClippedRect(expected_transform, quad_rect);

   // Obtain layer rect in target space by applying target_space_transform on
   // layer rect.
   gfx::RectF layer_rect(layer_size.width(), layer_size.height());
   gfx::RectF transformed_layer_rect =
       MathUtil::MapClippedRect(target_space_transform, layer_rect);

   // Check if quad rect in target space matches layer rect in target space
   EXPECT_EQ(transformed_quad_rect, transformed_layer_rect);
 }

 // This test verifies that activation_dependencies and the fallback_surface_id
 // are populated correctly if primary and fallback surfaces differ.
 TEST(SurfaceLayerImplTest, SurfaceLayerImplWithTwoDifferentSurfaces) {
   LayerTestCommon::LayerImplTest impl;
   SurfaceLayerImpl* surface_layer_impl =
       impl.AddChildToRoot<SurfaceLayerImpl>();

   // Populate the primary viz::SurfaceInfo.
   const viz::LocalSurfaceId kArbitraryLocalSurfaceId1(
       9, base::UnguessableToken::Create());
   viz::SurfaceId surface_id1(kArbitraryFrameSinkId, kArbitraryLocalSurfaceId1);
   float surface_scale1 = 1.f;
   gfx::Size surface_size1(300, 300);
   viz::SurfaceInfo primary_surface_info(surface_id1, surface_scale1,
                                         surface_size1);

   // Populate the fallback viz::SurfaceId.
   const viz::LocalSurfaceId kArbitraryLocalSurfaceId2(
       7, base::UnguessableToken::Create());
   viz::SurfaceId surface_id2(kArbitraryFrameSinkId, kArbitraryLocalSurfaceId2);

   gfx::Size layer_size(400, 100);

   // Populate the SurfaceLayerImpl ensuring that the primary and fallback
   // SurfaceInfos are different.
   surface_layer_impl->SetBounds(layer_size);
   surface_layer_impl->SetDrawsContent(true);
   surface_layer_impl->SetPrimarySurfaceInfo(primary_surface_info);
   surface_layer_impl->SetFallbackSurfaceId(surface_id2);
   surface_layer_impl->SetDefaultBackgroundColor(SK_ColorBLUE);

   gfx::Size viewport_size(1000, 1000);
   impl.CalcDrawProps(viewport_size);

   std::unique_ptr<viz::RenderPass> render_pass = viz::RenderPass::Create();
   {
     AppendQuadsData data;
     surface_layer_impl->AppendQuads(render_pass.get(), &data);
     // The the primary viz::SurfaceInfo will be added to
     // activation_dependencies.
     EXPECT_THAT(data.activation_dependencies,
                 UnorderedElementsAre(surface_id1));
   }

   // Update the fallback to an invalid viz::SurfaceInfo. The
   // |activation_dependencies| should still contain the primary
   // viz::SurfaceInfo.
   {
     AppendQuadsData data;
     surface_layer_impl->SetFallbackSurfaceId(viz::SurfaceId());
     surface_layer_impl->AppendQuads(render_pass.get(), &data);
     // The primary viz::SurfaceInfo should not be added to
     // activation_dependencies.
     EXPECT_THAT(data.activation_dependencies,
                 UnorderedElementsAre(surface_id1));
   }

   // Update the fallback viz::SurfaceInfo and re-emit DrawQuads.
   {
     AppendQuadsData data;
     surface_layer_impl->SetFallbackSurfaceId(surface_id2);
     surface_layer_impl->AppendQuads(render_pass.get(), &data);
     // The the primary viz::SurfaceInfo will be added to
     // activation_dependencies.
     EXPECT_THAT(data.activation_dependencies,
                 UnorderedElementsAre(surface_id1));
   }

   ASSERT_EQ(3u, render_pass->quad_list.size());
   const viz::SurfaceDrawQuad* surface_draw_quad1 =
       viz::SurfaceDrawQuad::MaterialCast(render_pass->quad_list.ElementAt(0));
   ASSERT_TRUE(surface_draw_quad1);
   const viz::SurfaceDrawQuad* surface_draw_quad2 =
       viz::SurfaceDrawQuad::MaterialCast(render_pass->quad_list.ElementAt(1));
   ASSERT_TRUE(surface_draw_quad2);
   const viz::SurfaceDrawQuad* surface_draw_quad3 =
       viz::SurfaceDrawQuad::MaterialCast(render_pass->quad_list.ElementAt(2));
   ASSERT_TRUE(surface_draw_quad3);

   EXPECT_EQ(surface_id1, surface_draw_quad1->primary_surface_id);
   EXPECT_EQ(SK_ColorBLUE, surface_draw_quad1->default_background_color);
   EXPECT_EQ(surface_id2, surface_draw_quad1->fallback_surface_id);

   EXPECT_EQ(surface_id1, surface_draw_quad2->primary_surface_id);
   EXPECT_EQ(SK_ColorBLUE, surface_draw_quad2->default_background_color);
   EXPECT_EQ(base::nullopt, surface_draw_quad2->fallback_surface_id);

   EXPECT_EQ(surface_id1, surface_draw_quad3->primary_surface_id);
   EXPECT_EQ(SK_ColorBLUE, surface_draw_quad3->default_background_color);
   EXPECT_EQ(surface_id2, surface_draw_quad3->fallback_surface_id);
 }

 // This test verifies that one viz::SurfaceDrawQuad is emitted if a
 // SurfaceLayerImpl holds the same surface ID for both the primary
 // and fallback viz::SurfaceInfo.
 TEST(SurfaceLayerImplTest, SurfaceLayerImplWithMatchingPrimaryAndFallback) {
   LayerTestCommon::LayerImplTest impl;
   SurfaceLayerImpl* surface_layer_impl =
       impl.AddChildToRoot<SurfaceLayerImpl>();

   // Populate the primary viz::SurfaceInfo.
   const viz::LocalSurfaceId kArbitraryLocalSurfaceId1(
       9, base::UnguessableToken::Create());
   viz::SurfaceId surface_id1(kArbitraryFrameSinkId, kArbitraryLocalSurfaceId1);
   float surface_scale1 = 1.f;
   gfx::Size surface_size1(300, 300);
   viz::SurfaceInfo primary_surface_info(surface_id1, surface_scale1,
                                         surface_size1);

   gfx::Size layer_size(400, 100);

   // Populate the SurfaceLayerImpl ensuring that the primary and fallback
   // SurfaceInfos are the same.
   surface_layer_impl->SetBounds(layer_size);
   surface_layer_impl->SetDrawsContent(true);
   surface_layer_impl->SetPrimarySurfaceInfo(primary_surface_info);
   surface_layer_impl->SetFallbackSurfaceId(primary_surface_info.id());
   surface_layer_impl->SetDefaultBackgroundColor(SK_ColorBLUE);

   gfx::Size viewport_size(1000, 1000);
   impl.CalcDrawProps(viewport_size);

   std::unique_ptr<viz::RenderPass> render_pass = viz::RenderPass::Create();
   AppendQuadsData data;
   surface_layer_impl->AppendQuads(render_pass.get(), &data);
   // As the primary and fallback SurfaceInfos match, there is no reason to
   // add the primary surface ID to |activation_dependencies| because it is not
   // an unresolved dependency. The fallback surface will already be added as a
   // reference in referenced_surfaces.
   EXPECT_THAT(data.activation_dependencies, testing::IsEmpty());

   ASSERT_EQ(1u, render_pass->quad_list.size());
   const viz::SurfaceDrawQuad* surface_draw_quad1 =
       viz::SurfaceDrawQuad::MaterialCast(render_pass->quad_list.ElementAt(0));
   ASSERT_TRUE(surface_draw_quad1);

   EXPECT_EQ(surface_id1, surface_draw_quad1->primary_surface_id);
   EXPECT_EQ(surface_id1, surface_draw_quad1->fallback_surface_id);
   EXPECT_EQ(SK_ColorBLUE, surface_draw_quad1->default_background_color);
 }

 }  // namespace
 }  // namespace 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 "cc/layers/surface_layer_impl.h"

	#include <stddef.h>

	#include "cc/layers/append_quads_data.h"
	#include "cc/test/layer_test_common.h"
	#include "cc/trees/layer_tree_host_common.h"
	#include "testing/gmock/include/gmock/gmock.h"
	#include "testing/gtest/include/gtest/gtest.h"

	using testing::UnorderedElementsAre;

	namespace cc {
	namespace {

	static constexpr viz::FrameSinkId kArbitraryFrameSinkId(1, 1);

	TEST(SurfaceLayerImplTest, OcclusionWithDeviceScaleFactor) {
	float device_scale_factor = 1.33f;

	gfx::Size layer_size(512, 512);
	gfx::Size scaled_surface_size(
	gfx::ScaleToCeiledSize(layer_size, device_scale_factor));
	gfx::Size viewport_size(681, 750);

	const viz::LocalSurfaceId kArbitraryLocalSurfaceId(
	9, base::UnguessableToken::Create());

	LayerTestCommon::LayerImplTest impl;

	SurfaceLayerImpl* surface_layer_impl =
	impl.AddChildToRoot<SurfaceLayerImpl>();
	surface_layer_impl->SetBounds(layer_size);
	surface_layer_impl->SetDrawsContent(true);
	viz::SurfaceId surface_id(kArbitraryFrameSinkId, kArbitraryLocalSurfaceId);
	surface_layer_impl->SetPrimarySurfaceInfo(
	viz::SurfaceInfo(surface_id, device_scale_factor, scaled_surface_size));

	RenderSurfaceList render_surface_list;
	LayerTreeHostCommon::CalcDrawPropsImplInputsForTesting inputs(
	impl.root_layer_for_testing(), viewport_size, device_scale_factor,
	&render_surface_list);
	LayerTreeHostCommon::CalculateDrawPropertiesForTesting(&inputs);

	{
	SCOPED_TRACE("No occlusion");
	gfx::Rect occluded;
	impl.AppendQuadsWithOcclusion(surface_layer_impl, occluded);

	LayerTestCommon::VerifyQuadsExactlyCoverRect(
	impl.quad_list(), gfx::Rect(scaled_surface_size));
	EXPECT_EQ(1u, impl.quad_list().size());
	}

	{
	SCOPED_TRACE("Full occlusion");
	gfx::Rect occluded(scaled_surface_size);
	impl.AppendQuadsWithOcclusion(surface_layer_impl, occluded);

	LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(), gfx::Rect());
	EXPECT_EQ(impl.quad_list().size(), 0u);
	}

	{
	SCOPED_TRACE("Partial occlusion");
	gfx::Rect occluded(gfx::ScaleToEnclosingRect(gfx::Rect(200, 0, 312, 512),
	device_scale_factor));
	impl.AppendQuadsWithOcclusion(surface_layer_impl, occluded);

	size_t partially_occluded_count = 0;
	LayerTestCommon::VerifyQuadsAreOccluded(impl.quad_list(), occluded,
	&partially_occluded_count);
	// The layer outputs one quad, which is partially occluded.
	EXPECT_EQ(1u, impl.quad_list().size());
	EXPECT_EQ(1u, partially_occluded_count);
	}
	{
	SCOPED_TRACE("No outside occlusion");
	gfx::Rect occluded(gfx::ScaleToEnclosingRect(gfx::Rect(0, 681, 681, 69),
	device_scale_factor));
	impl.AppendQuadsWithOcclusion(surface_layer_impl, occluded);

	LayerTestCommon::VerifyQuadsExactlyCoverRect(
	impl.quad_list(), gfx::Rect(scaled_surface_size));
	EXPECT_EQ(1u, impl.quad_list().size());
	}
	}

	TEST(SurfaceLayerImplTest, Occlusion) {
	gfx::Size layer_size(1000, 1000);
	gfx::Size viewport_size(1000, 1000);
	const viz::LocalSurfaceId kArbitraryLocalSurfaceId(
	9, base::UnguessableToken::Create());

	LayerTestCommon::LayerImplTest impl;

	SurfaceLayerImpl* surface_layer_impl =
	impl.AddChildToRoot<SurfaceLayerImpl>();
	surface_layer_impl->SetBounds(layer_size);
	surface_layer_impl->SetDrawsContent(true);
	viz::SurfaceId surface_id(kArbitraryFrameSinkId, kArbitraryLocalSurfaceId);
	surface_layer_impl->SetPrimarySurfaceInfo(
	viz::SurfaceInfo(surface_id, 1.f, layer_size));

	impl.CalcDrawProps(viewport_size);

	{
	SCOPED_TRACE("No occlusion");
	gfx::Rect occluded;
	impl.AppendQuadsWithOcclusion(surface_layer_impl, occluded);

	LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(),
	gfx::Rect(layer_size));
	EXPECT_EQ(1u, impl.quad_list().size());
	}

	{
	SCOPED_TRACE("Full occlusion");
	gfx::Rect occluded(surface_layer_impl->visible_layer_rect());
	impl.AppendQuadsWithOcclusion(surface_layer_impl, occluded);

	LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(), gfx::Rect());
	EXPECT_EQ(impl.quad_list().size(), 0u);
	}

	{
	SCOPED_TRACE("Partial occlusion");
	gfx::Rect occluded(200, 0, 800, 1000);
	impl.AppendQuadsWithOcclusion(surface_layer_impl, occluded);

	size_t partially_occluded_count = 0;
	LayerTestCommon::VerifyQuadsAreOccluded(
	impl.quad_list(), occluded, &partially_occluded_count);
	// The layer outputs one quad, which is partially occluded.
	EXPECT_EQ(1u, impl.quad_list().size());
	EXPECT_EQ(1u, partially_occluded_count);
	}
	}

	TEST(SurfaceLayerImplTest, SurfaceStretchedToLayerBounds) {
	LayerTestCommon::LayerImplTest impl;
	SurfaceLayerImpl* surface_layer_impl =
	impl.AddChildToRoot<SurfaceLayerImpl>();
	const viz::LocalSurfaceId kArbitraryLocalSurfaceId(
	9, base::UnguessableToken::Create());
	const viz::LocalSurfaceId kArbitraryLocalSurfaceId2(
	10, base::UnguessableToken::Create());

	// Given condition: layer and surface have different size and different
	// aspect ratios.
	gfx::Size layer_size(400, 100);
	gfx::Size surface_size(300, 300);
	gfx::Size viewport_size(1000, 1000);
	float surface_scale = 1.f;
	gfx::Transform target_space_transform(
	surface_layer_impl->draw_properties().target_space_transform);

	// The following code is mimicking the PushPropertiesTo from pending to
	// active tree.
	surface_layer_impl->SetBounds(layer_size);
	surface_layer_impl->SetDrawsContent(true);
	viz::SurfaceId surface_id(kArbitraryFrameSinkId, kArbitraryLocalSurfaceId);
	viz::SurfaceId surface_id2(kArbitraryFrameSinkId, kArbitraryLocalSurfaceId2);
	surface_layer_impl->SetPrimarySurfaceInfo(
	viz::SurfaceInfo(surface_id, surface_scale, surface_size));
	surface_layer_impl->SetFallbackSurfaceId(surface_id2);
	surface_layer_impl->SetStretchContentToFillBounds(true);

	impl.CalcDrawProps(viewport_size);

	std::unique_ptr<viz::RenderPass> render_pass = viz::RenderPass::Create();
	AppendQuadsData data;
	surface_layer_impl->AppendQuads(render_pass.get(), &data);
	EXPECT_THAT(data.activation_dependencies, UnorderedElementsAre(surface_id));

	const auto& quads = render_pass->quad_list;
	ASSERT_EQ(1u, quads.size());
	const viz::SharedQuadState* shared_quad_state =
	quads.front()->shared_quad_state;

	// We expect that the transform for the quad stretches the quad to cover the
	// entire bounds of the layer.
	gfx::Transform expected_transform(target_space_transform);
	float scale_x = static_cast<float>(surface_size.width()) / layer_size.width();
	float scale_y =
	static_cast<float>(surface_size.height()) / layer_size.height();
	expected_transform.Scale(SK_MScalar1 / scale_x, SK_MScalar1 / scale_y);
	EXPECT_EQ(expected_transform, shared_quad_state->quad_to_target_transform);

	// Obtain quad rect in target space by applying SQS->quad_to_target_transform
	// to quad_rect
	gfx::RectF quad_rect(quads.front()->rect);
	gfx::RectF transformed_quad_rect =
	MathUtil::MapClippedRect(expected_transform, quad_rect);

	// Obtain layer rect in target space by applying target_space_transform on
	// layer rect.
	gfx::RectF layer_rect(layer_size.width(), layer_size.height());
	gfx::RectF transformed_layer_rect =
	MathUtil::MapClippedRect(target_space_transform, layer_rect);

	// Check if quad rect in target space matches layer rect in target space
	EXPECT_EQ(transformed_quad_rect, transformed_layer_rect);
	}

	// This test verifies that activation_dependencies and the fallback_surface_id
	// are populated correctly if primary and fallback surfaces differ.
	TEST(SurfaceLayerImplTest, SurfaceLayerImplWithTwoDifferentSurfaces) {
	LayerTestCommon::LayerImplTest impl;
	SurfaceLayerImpl* surface_layer_impl =
	impl.AddChildToRoot<SurfaceLayerImpl>();

	// Populate the primary viz::SurfaceInfo.
	const viz::LocalSurfaceId kArbitraryLocalSurfaceId1(
	9, base::UnguessableToken::Create());
	viz::SurfaceId surface_id1(kArbitraryFrameSinkId, kArbitraryLocalSurfaceId1);
	float surface_scale1 = 1.f;
	gfx::Size surface_size1(300, 300);
	viz::SurfaceInfo primary_surface_info(surface_id1, surface_scale1,
	surface_size1);

	// Populate the fallback viz::SurfaceId.
	const viz::LocalSurfaceId kArbitraryLocalSurfaceId2(
	7, base::UnguessableToken::Create());
	viz::SurfaceId surface_id2(kArbitraryFrameSinkId, kArbitraryLocalSurfaceId2);

	gfx::Size layer_size(400, 100);

	// Populate the SurfaceLayerImpl ensuring that the primary and fallback
	// SurfaceInfos are different.
	surface_layer_impl->SetBounds(layer_size);
	surface_layer_impl->SetDrawsContent(true);
	surface_layer_impl->SetPrimarySurfaceInfo(primary_surface_info);
	surface_layer_impl->SetFallbackSurfaceId(surface_id2);
	surface_layer_impl->SetDefaultBackgroundColor(SK_ColorBLUE);

	gfx::Size viewport_size(1000, 1000);
	impl.CalcDrawProps(viewport_size);

	std::unique_ptr<viz::RenderPass> render_pass = viz::RenderPass::Create();
	{
	AppendQuadsData data;
	surface_layer_impl->AppendQuads(render_pass.get(), &data);
	// The the primary viz::SurfaceInfo will be added to
	// activation_dependencies.
	EXPECT_THAT(data.activation_dependencies,
	UnorderedElementsAre(surface_id1));
	}

	// Update the fallback to an invalid viz::SurfaceInfo. The
	// \|activation_dependencies\| should still contain the primary
	// viz::SurfaceInfo.
	{
	AppendQuadsData data;
	surface_layer_impl->SetFallbackSurfaceId(viz::SurfaceId());
	surface_layer_impl->AppendQuads(render_pass.get(), &data);
	// The primary viz::SurfaceInfo should not be added to
	// activation_dependencies.
	EXPECT_THAT(data.activation_dependencies,
	UnorderedElementsAre(surface_id1));
	}

	// Update the fallback viz::SurfaceInfo and re-emit DrawQuads.
	{
	AppendQuadsData data;
	surface_layer_impl->SetFallbackSurfaceId(surface_id2);
	surface_layer_impl->AppendQuads(render_pass.get(), &data);
	// The the primary viz::SurfaceInfo will be added to
	// activation_dependencies.
	EXPECT_THAT(data.activation_dependencies,
	UnorderedElementsAre(surface_id1));
	}

	ASSERT_EQ(3u, render_pass->quad_list.size());
	const viz::SurfaceDrawQuad* surface_draw_quad1 =
	viz::SurfaceDrawQuad::MaterialCast(render_pass->quad_list.ElementAt(0));
	ASSERT_TRUE(surface_draw_quad1);
	const viz::SurfaceDrawQuad* surface_draw_quad2 =
	viz::SurfaceDrawQuad::MaterialCast(render_pass->quad_list.ElementAt(1));
	ASSERT_TRUE(surface_draw_quad2);
	const viz::SurfaceDrawQuad* surface_draw_quad3 =
	viz::SurfaceDrawQuad::MaterialCast(render_pass->quad_list.ElementAt(2));
	ASSERT_TRUE(surface_draw_quad3);

	EXPECT_EQ(surface_id1, surface_draw_quad1->primary_surface_id);
	EXPECT_EQ(SK_ColorBLUE, surface_draw_quad1->default_background_color);
	EXPECT_EQ(surface_id2, surface_draw_quad1->fallback_surface_id);

	EXPECT_EQ(surface_id1, surface_draw_quad2->primary_surface_id);
	EXPECT_EQ(SK_ColorBLUE, surface_draw_quad2->default_background_color);
	EXPECT_EQ(base::nullopt, surface_draw_quad2->fallback_surface_id);

	EXPECT_EQ(surface_id1, surface_draw_quad3->primary_surface_id);
	EXPECT_EQ(SK_ColorBLUE, surface_draw_quad3->default_background_color);
	EXPECT_EQ(surface_id2, surface_draw_quad3->fallback_surface_id);
	}

	// This test verifies that one viz::SurfaceDrawQuad is emitted if a
	// SurfaceLayerImpl holds the same surface ID for both the primary
	// and fallback viz::SurfaceInfo.
	TEST(SurfaceLayerImplTest, SurfaceLayerImplWithMatchingPrimaryAndFallback) {
	LayerTestCommon::LayerImplTest impl;
	SurfaceLayerImpl* surface_layer_impl =
	impl.AddChildToRoot<SurfaceLayerImpl>();

	// Populate the primary viz::SurfaceInfo.
	const viz::LocalSurfaceId kArbitraryLocalSurfaceId1(
	9, base::UnguessableToken::Create());
	viz::SurfaceId surface_id1(kArbitraryFrameSinkId, kArbitraryLocalSurfaceId1);
	float surface_scale1 = 1.f;
	gfx::Size surface_size1(300, 300);
	viz::SurfaceInfo primary_surface_info(surface_id1, surface_scale1,
	surface_size1);

	gfx::Size layer_size(400, 100);

	// Populate the SurfaceLayerImpl ensuring that the primary and fallback
	// SurfaceInfos are the same.
	surface_layer_impl->SetBounds(layer_size);
	surface_layer_impl->SetDrawsContent(true);
	surface_layer_impl->SetPrimarySurfaceInfo(primary_surface_info);
	surface_layer_impl->SetFallbackSurfaceId(primary_surface_info.id());
	surface_layer_impl->SetDefaultBackgroundColor(SK_ColorBLUE);

	gfx::Size viewport_size(1000, 1000);
	impl.CalcDrawProps(viewport_size);

	std::unique_ptr<viz::RenderPass> render_pass = viz::RenderPass::Create();
	AppendQuadsData data;
	surface_layer_impl->AppendQuads(render_pass.get(), &data);
	// As the primary and fallback SurfaceInfos match, there is no reason to
	// add the primary surface ID to \|activation_dependencies\| because it is not
	// an unresolved dependency. The fallback surface will already be added as a
	// reference in referenced_surfaces.
	EXPECT_THAT(data.activation_dependencies, testing::IsEmpty());

	ASSERT_EQ(1u, render_pass->quad_list.size());
	const viz::SurfaceDrawQuad* surface_draw_quad1 =
	viz::SurfaceDrawQuad::MaterialCast(render_pass->quad_list.ElementAt(0));
	ASSERT_TRUE(surface_draw_quad1);

	EXPECT_EQ(surface_id1, surface_draw_quad1->primary_surface_id);
	EXPECT_EQ(surface_id1, surface_draw_quad1->fallback_surface_id);
	EXPECT_EQ(SK_ColorBLUE, surface_draw_quad1->default_background_color);
	}

	} // namespace
	} // namespace cc