src/dawn/tests/end2end/SwapChainTests.cpp - dawn - Git at Google

 // Copyright 2020 The Dawn Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 #include <vector>

 #include "dawn/common/Constants.h"
 #include "dawn/common/Log.h"
 #include "dawn/tests/DawnTest.h"
 #include "dawn/utils/ComboRenderPipelineDescriptor.h"
 #include "dawn/utils/WGPUHelpers.h"
 #include "webgpu/webgpu_glfw.h"

 #include "GLFW/glfw3.h"

 namespace dawn {
 namespace {

 class SwapChainTests : public DawnTest {
   public:
     void SetUp() override {
         DawnTest::SetUp();
         DAWN_TEST_UNSUPPORTED_IF(UsesWire());

         glfwSetErrorCallback([](int code, const char* message) {
             ErrorLog() << "GLFW error " << code << " " << message;
         });

         // GLFW can fail to start in headless environments, in which SwapChainTests are
         // inapplicable. Skip this cases without producing a test failure.
         if (glfwInit() == GLFW_FALSE) {
             GTEST_SKIP();
         }

         // Set GLFW_NO_API to avoid GLFW bringing up a GL context that we won't use.
         glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
         window = glfwCreateWindow(400, 400, "SwapChainValidationTests window", nullptr, nullptr);

         int width;
         int height;
         glfwGetFramebufferSize(window, &width, &height);

         surface = wgpu::glfw::CreateSurfaceForWindow(GetInstance(), window);
         ASSERT_NE(surface, nullptr);

         baseDescriptor.width = width;
         baseDescriptor.height = height;
         baseDescriptor.usage = wgpu::TextureUsage::RenderAttachment;
         baseDescriptor.format = wgpu::TextureFormat::BGRA8Unorm;
         baseDescriptor.presentMode = wgpu::PresentMode::Mailbox;
     }

     void TearDown() override {
         // Destroy the surface before the window as required by webgpu-native.
         surface = wgpu::Surface();
         if (window != nullptr) {
             glfwDestroyWindow(window);
         }
         DawnTest::TearDown();
     }

     void ClearTexture(wgpu::TextureView view, wgpu::Color color) {
         utils::ComboRenderPassDescriptor desc({view});
         desc.cColorAttachments[0].loadOp = wgpu::LoadOp::Clear;
         desc.cColorAttachments[0].clearValue = color;

         wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
         wgpu::RenderPassEncoder pass = encoder.BeginRenderPass(&desc);
         pass.End();

         wgpu::CommandBuffer commands = encoder.Finish();
         queue.Submit(1, &commands);
     }

   protected:
     GLFWwindow* window = nullptr;
     wgpu::Surface surface;

     wgpu::SwapChainDescriptor baseDescriptor;
 };

 // Basic test for creating a swapchain and presenting one frame.
 TEST_P(SwapChainTests, Basic) {
     wgpu::SwapChain swapchain = device.CreateSwapChain(surface, &baseDescriptor);
     ClearTexture(swapchain.GetCurrentTextureView(), {1.0, 0.0, 0.0, 1.0});
     swapchain.Present();
 }

 // Test replacing the swapchain
 TEST_P(SwapChainTests, ReplaceBasic) {
     wgpu::SwapChain swapchain1 = device.CreateSwapChain(surface, &baseDescriptor);
     ClearTexture(swapchain1.GetCurrentTextureView(), {1.0, 0.0, 0.0, 1.0});
     swapchain1.Present();

     wgpu::SwapChain swapchain2 = device.CreateSwapChain(surface, &baseDescriptor);
     ClearTexture(swapchain2.GetCurrentTextureView(), {0.0, 1.0, 0.0, 1.0});
     swapchain2.Present();
 }

 // Test replacing the swapchain after GetCurrentTextureView
 TEST_P(SwapChainTests, ReplaceAfterGet) {
     wgpu::SwapChain swapchain1 = device.CreateSwapChain(surface, &baseDescriptor);
     ClearTexture(swapchain1.GetCurrentTextureView(), {1.0, 0.0, 0.0, 1.0});

     wgpu::SwapChain swapchain2 = device.CreateSwapChain(surface, &baseDescriptor);
     ClearTexture(swapchain2.GetCurrentTextureView(), {0.0, 1.0, 0.0, 1.0});
     swapchain2.Present();
 }

 // Test destroying the swapchain after GetCurrentTextureView
 TEST_P(SwapChainTests, DestroyAfterGet) {
     wgpu::SwapChain swapchain = device.CreateSwapChain(surface, &baseDescriptor);
     ClearTexture(swapchain.GetCurrentTextureView(), {1.0, 0.0, 0.0, 1.0});
 }

 // Test destroying the surface before the swapchain
 TEST_P(SwapChainTests, DestroySurface) {
     wgpu::SwapChain swapchain = device.CreateSwapChain(surface, &baseDescriptor);
     surface = nullptr;
 }

 // Test destroying the surface before the swapchain but after GetCurrentTextureView
 TEST_P(SwapChainTests, DestroySurfaceAfterGet) {
     wgpu::SwapChain swapchain = device.CreateSwapChain(surface, &baseDescriptor);
     ClearTexture(swapchain.GetCurrentTextureView(), {1.0, 0.0, 0.0, 1.0});
     surface = nullptr;
 }

 // Test switching between present modes.
 TEST_P(SwapChainTests, SwitchPresentMode) {
     // Fails with "internal drawable creation failed" on the Windows NVIDIA CQ builders but not
     // locally.
     DAWN_SUPPRESS_TEST_IF(IsWindows() && IsVulkan() && IsNvidia());

     // TODO(jiawei.shao@intel.com): find out why this test sometimes hangs on the latest Linux Intel
     // Vulkan drivers.
     DAWN_SUPPRESS_TEST_IF(IsLinux() && IsVulkan() && IsIntel());

     constexpr wgpu::PresentMode kAllPresentModes[] = {
         wgpu::PresentMode::Immediate,
         wgpu::PresentMode::Fifo,
         wgpu::PresentMode::Mailbox,
     };

     for (wgpu::PresentMode mode1 : kAllPresentModes) {
         for (wgpu::PresentMode mode2 : kAllPresentModes) {
             wgpu::SwapChainDescriptor desc = baseDescriptor;

             desc.presentMode = mode1;
             wgpu::SwapChain swapchain1 = device.CreateSwapChain(surface, &desc);
             ClearTexture(swapchain1.GetCurrentTextureView(), {0.0, 0.0, 0.0, 1.0});
             swapchain1.Present();

             desc.presentMode = mode2;
             wgpu::SwapChain swapchain2 = device.CreateSwapChain(surface, &desc);
             ClearTexture(swapchain2.GetCurrentTextureView(), {0.0, 0.0, 0.0, 1.0});
             swapchain2.Present();
         }
     }
 }

 // Test resizing the swapchain and without resizing the window.
 TEST_P(SwapChainTests, ResizingSwapChainOnly) {
     for (int i = 0; i < 10; i++) {
         wgpu::SwapChainDescriptor desc = baseDescriptor;
         desc.width += i * 10;
         desc.height -= i * 10;

         wgpu::SwapChain swapchain = device.CreateSwapChain(surface, &desc);
         ClearTexture(swapchain.GetCurrentTextureView(), {0.05f * i, 0.0f, 0.0f, 1.0f});
         swapchain.Present();
     }
 }

 // Test resizing the window but not the swapchain.
 TEST_P(SwapChainTests, ResizingWindowOnly) {
     wgpu::SwapChain swapchain = device.CreateSwapChain(surface, &baseDescriptor);

     for (int i = 0; i < 10; i++) {
         glfwSetWindowSize(window, 400 - 10 * i, 400 + 10 * i);
         glfwPollEvents();

         ClearTexture(swapchain.GetCurrentTextureView(), {0.05f * i, 0.0f, 0.0f, 1.0f});
         swapchain.Present();
     }
 }

 // Test resizing both the window and the swapchain at the same time.
 TEST_P(SwapChainTests, ResizingWindowAndSwapChain) {
     // TODO(crbug.com/dawn/1205) Currently failing on new NVIDIA GTX 1660s on Linux/Vulkan.
     DAWN_SUPPRESS_TEST_IF(IsLinux() && IsVulkan() && IsNvidia());
     for (int i = 0; i < 10; i++) {
         glfwSetWindowSize(window, 400 - 10 * i, 400 + 10 * i);
         glfwPollEvents();

         int width;
         int height;
         glfwGetFramebufferSize(window, &width, &height);

         wgpu::SwapChainDescriptor desc = baseDescriptor;
         desc.width = width;
         desc.height = height;

         wgpu::SwapChain swapchain = device.CreateSwapChain(surface, &desc);
         ClearTexture(swapchain.GetCurrentTextureView(), {0.05f * i, 0.0f, 0.0f, 1.0f});
         swapchain.Present();
     }
 }

 // Test switching devices on the same adapter.
 TEST_P(SwapChainTests, SwitchingDevice) {
     wgpu::Device device2 = CreateDevice();

     for (int i = 0; i < 3; i++) {
         wgpu::Device deviceToUse;
         if (i % 2 == 0) {
             deviceToUse = device;
         } else {
             deviceToUse = device2;
         }

         wgpu::SwapChain swapchain = deviceToUse.CreateSwapChain(surface, &baseDescriptor);
         swapchain.GetCurrentTextureView();
         swapchain.Present();
     }
 }

 // Test that calling Device.GetSupportedSurfaceUsage() will throw an error because
 // SurfaceCapabilities is not enabled.
 TEST_P(SwapChainTests, ErrorGetSurfaceSupportedUsage) {
     DAWN_TEST_UNSUPPORTED_IF(HasToggleEnabled("skip_validation"));
     EXPECT_FALSE(device.HasFeature(wgpu::FeatureName::SurfaceCapabilities));

     ASSERT_DEVICE_ERROR_MSG(
         {
             auto usageFlags = device.GetSupportedSurfaceUsage(surface);
             EXPECT_EQ(usageFlags, wgpu::TextureUsage::None);
         },
         testing::HasSubstr("FeatureName::SurfaceCapabilities is not enabled"));
 }

 // Test that creating swapchain with TextureBinding usage without enabling SurfaceCapabilities
 // feature should fail.
 TEST_P(SwapChainTests, ErrorCreateWithTextureBindingUsage) {
     DAWN_TEST_UNSUPPORTED_IF(HasToggleEnabled("skip_validation"));
     EXPECT_FALSE(device.HasFeature(wgpu::FeatureName::SurfaceCapabilities));

     auto desc = baseDescriptor;
     desc.usage = wgpu::TextureUsage::TextureBinding | wgpu::TextureUsage::RenderAttachment;

     ASSERT_DEVICE_ERROR_MSG(
         { auto swapchain = device.CreateSwapChain(surface, &desc); },
         testing::HasSubstr("require enabling FeatureName::SurfaceCapabilities"));
 }

 class SwapChainWithAdditionalUsageTests : public SwapChainTests {
   protected:
     std::vector<wgpu::FeatureName> GetRequiredFeatures() override {
         std::vector<wgpu::FeatureName> features;
         if (!UsesWire() && SupportsFeatures({wgpu::FeatureName::SurfaceCapabilities})) {
             features.push_back(wgpu::FeatureName::SurfaceCapabilities);
         }
         return features;
     }

     void SetUp() override {
         SwapChainTests::SetUp();

         // If parent class skipped the test, we should skip as well.
         if (surface == nullptr) {
             GTEST_SKIP();
         }

         DAWN_TEST_UNSUPPORTED_IF(!SupportsFeatures({wgpu::FeatureName::SurfaceCapabilities}));
     }

     void SampleTexture(wgpu::TextureView view,
                        uint32_t width,
                        uint32_t height,
                        utils::RGBA8 expectedColor) {
         wgpu::TextureDescriptor texDescriptor;
         texDescriptor.size = {width, height, 1};
         texDescriptor.format = wgpu::TextureFormat::RGBA8Unorm;
         texDescriptor.usage = wgpu::TextureUsage::RenderAttachment | wgpu::TextureUsage::CopySrc |
                               wgpu::TextureUsage::CopyDst;
         texDescriptor.mipLevelCount = 1;
         texDescriptor.sampleCount = 1;

         wgpu::Texture dstTexture = device.CreateTexture(&texDescriptor);
         wgpu::TextureView dstView = dstTexture.CreateView();

         // Create a render pipeline to blit |view| into |dstView|.
         utils::ComboRenderPipelineDescriptor pipelineDesc;
         pipelineDesc.vertex.module = utils::CreateShaderModule(device, R"(
             @vertex
             fn main(@builtin(vertex_index) VertexIndex : u32) -> @builtin(position) vec4f {
                 var pos = array(
                                             vec2f(-1.0, -1.0),
                                             vec2f(-1.0,  1.0),
                                             vec2f( 1.0, -1.0),
                                             vec2f(-1.0,  1.0),
                                             vec2f( 1.0, -1.0),
                                             vec2f( 1.0,  1.0));
                 return vec4f(pos[VertexIndex], 0.0, 1.0);
             }
         )");
         pipelineDesc.cFragment.module = utils::CreateShaderModule(device, R"(
             @group(0) @binding(0) var texture : texture_2d<f32>;

             @fragment
             fn main(@builtin(position) coord: vec4f) -> @location(0) vec4f {
                 return textureLoad(texture, vec2i(coord.xy), 0);
             }
         )");
         pipelineDesc.cTargets[0].format = texDescriptor.format;

         // Submit a render pass to perform the blit from |view| to |dstView|.
         wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
         {
             wgpu::RenderPipeline pipeline = device.CreateRenderPipeline(&pipelineDesc);

             wgpu::BindGroup bindGroup =
                 utils::MakeBindGroup(device, pipeline.GetBindGroupLayout(0), {{0, view}});

             utils::ComboRenderPassDescriptor renderPassInfo({dstView});

             wgpu::RenderPassEncoder pass = encoder.BeginRenderPass(&renderPassInfo);
             pass.SetPipeline(pipeline);
             pass.SetBindGroup(0, bindGroup);
             pass.Draw(6);
             pass.End();
         }

         wgpu::CommandBuffer commands = encoder.Finish();
         queue.Submit(1, &commands);

         EXPECT_TEXTURE_EQ(expectedColor, dstTexture, {0, 0});
         EXPECT_TEXTURE_EQ(expectedColor, dstTexture, {width - 1, height - 1});
     }
 };

 TEST_P(SwapChainWithAdditionalUsageTests, GetSurfaceSupportedUsage) {
     auto usageFlags = device.GetSupportedSurfaceUsage(surface);
     EXPECT_NE(usageFlags, wgpu::TextureUsage::None);
 }

 // Test that sampling from swapchain is supported.
 TEST_P(SwapChainWithAdditionalUsageTests, SamplingFromSwapChain) {
     // TODO(dawn:1551): Reenable on D3D11 after suppressing the D3D11 debug layer warning for
     // setting the same private data multiple times.
     DAWN_SUPPRESS_TEST_IF(IsD3D11());

     // Skip all tests if readable surface doesn't support texture binding
     DAWN_TEST_UNSUPPORTED_IF(
         (device.GetSupportedSurfaceUsage(surface) & wgpu::TextureUsage::TextureBinding) == 0);

     auto desc = baseDescriptor;
     desc.usage = wgpu::TextureUsage::TextureBinding | wgpu::TextureUsage::RenderAttachment;

     wgpu::SwapChain swapchain = device.CreateSwapChain(surface, &desc);
     ClearTexture(swapchain.GetCurrentTextureView(), {1.0, 0.0, 0.0, 1.0});

     SampleTexture(swapchain.GetCurrentTextureView(), baseDescriptor.width, baseDescriptor.height,
                   utils::RGBA8::kRed);

     swapchain.Present();
 }

 // Test that including unsupported usage flag will result in error.
 TEST_P(SwapChainWithAdditionalUsageTests, ErrorIncludeUnsupportedUsage) {
     DAWN_TEST_UNSUPPORTED_IF(HasToggleEnabled("skip_validation"));

     auto supportedUsage = device.GetSupportedSurfaceUsage(surface);

     // Assuming StorageBinding is not supported.
     DAWN_TEST_UNSUPPORTED_IF((supportedUsage & wgpu::TextureUsage::StorageBinding) != 0);

     auto desc = baseDescriptor;
     desc.usage = supportedUsage | wgpu::TextureUsage::StorageBinding;

     ASSERT_DEVICE_ERROR_MSG({ auto swapchain = device.CreateSwapChain(surface, &desc); },
                             testing::HasSubstr("is not supported"));
 }

 DAWN_INSTANTIATE_TEST(SwapChainTests, MetalBackend(), VulkanBackend());
 DAWN_INSTANTIATE_TEST(SwapChainWithAdditionalUsageTests,
                       D3D11Backend(),
                       D3D12Backend(),
                       MetalBackend(),
                       NullBackend(),
                       VulkanBackend());

 }  // anonymous namespace
 }  // namespace dawn
	// Copyright 2020 The Dawn Authors
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	#include <vector>

	#include "dawn/common/Constants.h"
	#include "dawn/common/Log.h"
	#include "dawn/tests/DawnTest.h"
	#include "dawn/utils/ComboRenderPipelineDescriptor.h"
	#include "dawn/utils/WGPUHelpers.h"
	#include "webgpu/webgpu_glfw.h"

	#include "GLFW/glfw3.h"

	namespace dawn {
	namespace {

	class SwapChainTests : public DawnTest {
	public:
	void SetUp() override {
	DawnTest::SetUp();
	DAWN_TEST_UNSUPPORTED_IF(UsesWire());

	glfwSetErrorCallback([](int code, const char* message) {
	ErrorLog() << "GLFW error " << code << " " << message;
	});

	// GLFW can fail to start in headless environments, in which SwapChainTests are
	// inapplicable. Skip this cases without producing a test failure.
	if (glfwInit() == GLFW_FALSE) {
	GTEST_SKIP();
	}

	// Set GLFW_NO_API to avoid GLFW bringing up a GL context that we won't use.
	glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
	window = glfwCreateWindow(400, 400, "SwapChainValidationTests window", nullptr, nullptr);

	int width;
	int height;
	glfwGetFramebufferSize(window, &width, &height);

	surface = wgpu::glfw::CreateSurfaceForWindow(GetInstance(), window);
	ASSERT_NE(surface, nullptr);

	baseDescriptor.width = width;
	baseDescriptor.height = height;
	baseDescriptor.usage = wgpu::TextureUsage::RenderAttachment;
	baseDescriptor.format = wgpu::TextureFormat::BGRA8Unorm;
	baseDescriptor.presentMode = wgpu::PresentMode::Mailbox;
	}

	void TearDown() override {
	// Destroy the surface before the window as required by webgpu-native.
	surface = wgpu::Surface();
	if (window != nullptr) {
	glfwDestroyWindow(window);
	}
	DawnTest::TearDown();
	}

	void ClearTexture(wgpu::TextureView view, wgpu::Color color) {
	utils::ComboRenderPassDescriptor desc({view});
	desc.cColorAttachments[0].loadOp = wgpu::LoadOp::Clear;
	desc.cColorAttachments[0].clearValue = color;

	wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
	wgpu::RenderPassEncoder pass = encoder.BeginRenderPass(&desc);
	pass.End();

	wgpu::CommandBuffer commands = encoder.Finish();
	queue.Submit(1, &commands);
	}

	protected:
	GLFWwindow* window = nullptr;
	wgpu::Surface surface;

	wgpu::SwapChainDescriptor baseDescriptor;
	};

	// Basic test for creating a swapchain and presenting one frame.
	TEST_P(SwapChainTests, Basic) {
	wgpu::SwapChain swapchain = device.CreateSwapChain(surface, &baseDescriptor);
	ClearTexture(swapchain.GetCurrentTextureView(), {1.0, 0.0, 0.0, 1.0});
	swapchain.Present();
	}

	// Test replacing the swapchain
	TEST_P(SwapChainTests, ReplaceBasic) {
	wgpu::SwapChain swapchain1 = device.CreateSwapChain(surface, &baseDescriptor);
	ClearTexture(swapchain1.GetCurrentTextureView(), {1.0, 0.0, 0.0, 1.0});
	swapchain1.Present();

	wgpu::SwapChain swapchain2 = device.CreateSwapChain(surface, &baseDescriptor);
	ClearTexture(swapchain2.GetCurrentTextureView(), {0.0, 1.0, 0.0, 1.0});
	swapchain2.Present();
	}

	// Test replacing the swapchain after GetCurrentTextureView
	TEST_P(SwapChainTests, ReplaceAfterGet) {
	wgpu::SwapChain swapchain1 = device.CreateSwapChain(surface, &baseDescriptor);
	ClearTexture(swapchain1.GetCurrentTextureView(), {1.0, 0.0, 0.0, 1.0});

	wgpu::SwapChain swapchain2 = device.CreateSwapChain(surface, &baseDescriptor);
	ClearTexture(swapchain2.GetCurrentTextureView(), {0.0, 1.0, 0.0, 1.0});
	swapchain2.Present();
	}

	// Test destroying the swapchain after GetCurrentTextureView
	TEST_P(SwapChainTests, DestroyAfterGet) {
	wgpu::SwapChain swapchain = device.CreateSwapChain(surface, &baseDescriptor);
	ClearTexture(swapchain.GetCurrentTextureView(), {1.0, 0.0, 0.0, 1.0});
	}

	// Test destroying the surface before the swapchain
	TEST_P(SwapChainTests, DestroySurface) {
	wgpu::SwapChain swapchain = device.CreateSwapChain(surface, &baseDescriptor);
	surface = nullptr;
	}

	// Test destroying the surface before the swapchain but after GetCurrentTextureView
	TEST_P(SwapChainTests, DestroySurfaceAfterGet) {
	wgpu::SwapChain swapchain = device.CreateSwapChain(surface, &baseDescriptor);
	ClearTexture(swapchain.GetCurrentTextureView(), {1.0, 0.0, 0.0, 1.0});
	surface = nullptr;
	}

	// Test switching between present modes.
	TEST_P(SwapChainTests, SwitchPresentMode) {
	// Fails with "internal drawable creation failed" on the Windows NVIDIA CQ builders but not
	// locally.
	DAWN_SUPPRESS_TEST_IF(IsWindows() && IsVulkan() && IsNvidia());

	// TODO(jiawei.shao@intel.com): find out why this test sometimes hangs on the latest Linux Intel
	// Vulkan drivers.
	DAWN_SUPPRESS_TEST_IF(IsLinux() && IsVulkan() && IsIntel());

	constexpr wgpu::PresentMode kAllPresentModes[] = {
	wgpu::PresentMode::Immediate,
	wgpu::PresentMode::Fifo,
	wgpu::PresentMode::Mailbox,
	};

	for (wgpu::PresentMode mode1 : kAllPresentModes) {
	for (wgpu::PresentMode mode2 : kAllPresentModes) {
	wgpu::SwapChainDescriptor desc = baseDescriptor;

	desc.presentMode = mode1;
	wgpu::SwapChain swapchain1 = device.CreateSwapChain(surface, &desc);
	ClearTexture(swapchain1.GetCurrentTextureView(), {0.0, 0.0, 0.0, 1.0});
	swapchain1.Present();

	desc.presentMode = mode2;
	wgpu::SwapChain swapchain2 = device.CreateSwapChain(surface, &desc);
	ClearTexture(swapchain2.GetCurrentTextureView(), {0.0, 0.0, 0.0, 1.0});
	swapchain2.Present();
	}
	}
	}

	// Test resizing the swapchain and without resizing the window.
	TEST_P(SwapChainTests, ResizingSwapChainOnly) {
	for (int i = 0; i < 10; i++) {
	wgpu::SwapChainDescriptor desc = baseDescriptor;
	desc.width += i * 10;
	desc.height -= i * 10;

	wgpu::SwapChain swapchain = device.CreateSwapChain(surface, &desc);
	ClearTexture(swapchain.GetCurrentTextureView(), {0.05f * i, 0.0f, 0.0f, 1.0f});
	swapchain.Present();
	}
	}

	// Test resizing the window but not the swapchain.
	TEST_P(SwapChainTests, ResizingWindowOnly) {
	wgpu::SwapChain swapchain = device.CreateSwapChain(surface, &baseDescriptor);

	for (int i = 0; i < 10; i++) {
	glfwSetWindowSize(window, 400 - 10 * i, 400 + 10 * i);
	glfwPollEvents();

	ClearTexture(swapchain.GetCurrentTextureView(), {0.05f * i, 0.0f, 0.0f, 1.0f});
	swapchain.Present();
	}
	}

	// Test resizing both the window and the swapchain at the same time.
	TEST_P(SwapChainTests, ResizingWindowAndSwapChain) {
	// TODO(crbug.com/dawn/1205) Currently failing on new NVIDIA GTX 1660s on Linux/Vulkan.
	DAWN_SUPPRESS_TEST_IF(IsLinux() && IsVulkan() && IsNvidia());
	for (int i = 0; i < 10; i++) {
	glfwSetWindowSize(window, 400 - 10 * i, 400 + 10 * i);
	glfwPollEvents();

	int width;
	int height;
	glfwGetFramebufferSize(window, &width, &height);

	wgpu::SwapChainDescriptor desc = baseDescriptor;
	desc.width = width;
	desc.height = height;

	wgpu::SwapChain swapchain = device.CreateSwapChain(surface, &desc);
	ClearTexture(swapchain.GetCurrentTextureView(), {0.05f * i, 0.0f, 0.0f, 1.0f});
	swapchain.Present();
	}
	}

	// Test switching devices on the same adapter.
	TEST_P(SwapChainTests, SwitchingDevice) {
	wgpu::Device device2 = CreateDevice();

	for (int i = 0; i < 3; i++) {
	wgpu::Device deviceToUse;
	if (i % 2 == 0) {
	deviceToUse = device;
	} else {
	deviceToUse = device2;
	}

	wgpu::SwapChain swapchain = deviceToUse.CreateSwapChain(surface, &baseDescriptor);
	swapchain.GetCurrentTextureView();
	swapchain.Present();
	}
	}

	// Test that calling Device.GetSupportedSurfaceUsage() will throw an error because
	// SurfaceCapabilities is not enabled.
	TEST_P(SwapChainTests, ErrorGetSurfaceSupportedUsage) {
	DAWN_TEST_UNSUPPORTED_IF(HasToggleEnabled("skip_validation"));
	EXPECT_FALSE(device.HasFeature(wgpu::FeatureName::SurfaceCapabilities));

	ASSERT_DEVICE_ERROR_MSG(
	{
	auto usageFlags = device.GetSupportedSurfaceUsage(surface);
	EXPECT_EQ(usageFlags, wgpu::TextureUsage::None);
	},
	testing::HasSubstr("FeatureName::SurfaceCapabilities is not enabled"));
	}

	// Test that creating swapchain with TextureBinding usage without enabling SurfaceCapabilities
	// feature should fail.
	TEST_P(SwapChainTests, ErrorCreateWithTextureBindingUsage) {
	DAWN_TEST_UNSUPPORTED_IF(HasToggleEnabled("skip_validation"));
	EXPECT_FALSE(device.HasFeature(wgpu::FeatureName::SurfaceCapabilities));

	auto desc = baseDescriptor;
	desc.usage = wgpu::TextureUsage::TextureBinding \| wgpu::TextureUsage::RenderAttachment;

	ASSERT_DEVICE_ERROR_MSG(
	{ auto swapchain = device.CreateSwapChain(surface, &desc); },
	testing::HasSubstr("require enabling FeatureName::SurfaceCapabilities"));
	}

	class SwapChainWithAdditionalUsageTests : public SwapChainTests {
	protected:
	std::vector<wgpu::FeatureName> GetRequiredFeatures() override {
	std::vector<wgpu::FeatureName> features;
	if (!UsesWire() && SupportsFeatures({wgpu::FeatureName::SurfaceCapabilities})) {
	features.push_back(wgpu::FeatureName::SurfaceCapabilities);
	}
	return features;
	}

	void SetUp() override {
	SwapChainTests::SetUp();

	// If parent class skipped the test, we should skip as well.
	if (surface == nullptr) {
	GTEST_SKIP();
	}

	DAWN_TEST_UNSUPPORTED_IF(!SupportsFeatures({wgpu::FeatureName::SurfaceCapabilities}));
	}

	void SampleTexture(wgpu::TextureView view,
	uint32_t width,
	uint32_t height,
	utils::RGBA8 expectedColor) {
	wgpu::TextureDescriptor texDescriptor;
	texDescriptor.size = {width, height, 1};
	texDescriptor.format = wgpu::TextureFormat::RGBA8Unorm;
	texDescriptor.usage = wgpu::TextureUsage::RenderAttachment \| wgpu::TextureUsage::CopySrc \|
	wgpu::TextureUsage::CopyDst;
	texDescriptor.mipLevelCount = 1;
	texDescriptor.sampleCount = 1;

	wgpu::Texture dstTexture = device.CreateTexture(&texDescriptor);
	wgpu::TextureView dstView = dstTexture.CreateView();

	// Create a render pipeline to blit \|view\| into \|dstView\|.
	utils::ComboRenderPipelineDescriptor pipelineDesc;
	pipelineDesc.vertex.module = utils::CreateShaderModule(device, R"(
	@vertex
	fn main(@builtin(vertex_index) VertexIndex : u32) -> @builtin(position) vec4f {
	var pos = array(
	vec2f(-1.0, -1.0),
	vec2f(-1.0, 1.0),
	vec2f( 1.0, -1.0),
	vec2f(-1.0, 1.0),
	vec2f( 1.0, -1.0),
	vec2f( 1.0, 1.0));
	return vec4f(pos[VertexIndex], 0.0, 1.0);
	}
	)");
	pipelineDesc.cFragment.module = utils::CreateShaderModule(device, R"(
	@group(0) @binding(0) var texture : texture_2d<f32>;

	@fragment
	fn main(@builtin(position) coord: vec4f) -> @location(0) vec4f {
	return textureLoad(texture, vec2i(coord.xy), 0);
	}
	)");
	pipelineDesc.cTargets[0].format = texDescriptor.format;

	// Submit a render pass to perform the blit from \|view\| to \|dstView\|.
	wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
	{
	wgpu::RenderPipeline pipeline = device.CreateRenderPipeline(&pipelineDesc);

	wgpu::BindGroup bindGroup =
	utils::MakeBindGroup(device, pipeline.GetBindGroupLayout(0), {{0, view}});

	utils::ComboRenderPassDescriptor renderPassInfo({dstView});

	wgpu::RenderPassEncoder pass = encoder.BeginRenderPass(&renderPassInfo);
	pass.SetPipeline(pipeline);
	pass.SetBindGroup(0, bindGroup);
	pass.Draw(6);
	pass.End();
	}

	wgpu::CommandBuffer commands = encoder.Finish();
	queue.Submit(1, &commands);

	EXPECT_TEXTURE_EQ(expectedColor, dstTexture, {0, 0});
	EXPECT_TEXTURE_EQ(expectedColor, dstTexture, {width - 1, height - 1});
	}
	};

	TEST_P(SwapChainWithAdditionalUsageTests, GetSurfaceSupportedUsage) {
	auto usageFlags = device.GetSupportedSurfaceUsage(surface);
	EXPECT_NE(usageFlags, wgpu::TextureUsage::None);
	}

	// Test that sampling from swapchain is supported.
	TEST_P(SwapChainWithAdditionalUsageTests, SamplingFromSwapChain) {
	// TODO(dawn:1551): Reenable on D3D11 after suppressing the D3D11 debug layer warning for
	// setting the same private data multiple times.
	DAWN_SUPPRESS_TEST_IF(IsD3D11());

	// Skip all tests if readable surface doesn't support texture binding
	DAWN_TEST_UNSUPPORTED_IF(
	(device.GetSupportedSurfaceUsage(surface) & wgpu::TextureUsage::TextureBinding) == 0);

	auto desc = baseDescriptor;
	desc.usage = wgpu::TextureUsage::TextureBinding \| wgpu::TextureUsage::RenderAttachment;

	wgpu::SwapChain swapchain = device.CreateSwapChain(surface, &desc);
	ClearTexture(swapchain.GetCurrentTextureView(), {1.0, 0.0, 0.0, 1.0});

	SampleTexture(swapchain.GetCurrentTextureView(), baseDescriptor.width, baseDescriptor.height,
	utils::RGBA8::kRed);

	swapchain.Present();
	}

	// Test that including unsupported usage flag will result in error.
	TEST_P(SwapChainWithAdditionalUsageTests, ErrorIncludeUnsupportedUsage) {
	DAWN_TEST_UNSUPPORTED_IF(HasToggleEnabled("skip_validation"));

	auto supportedUsage = device.GetSupportedSurfaceUsage(surface);

	// Assuming StorageBinding is not supported.
	DAWN_TEST_UNSUPPORTED_IF((supportedUsage & wgpu::TextureUsage::StorageBinding) != 0);

	auto desc = baseDescriptor;
	desc.usage = supportedUsage \| wgpu::TextureUsage::StorageBinding;

	ASSERT_DEVICE_ERROR_MSG({ auto swapchain = device.CreateSwapChain(surface, &desc); },
	testing::HasSubstr("is not supported"));
	}

	DAWN_INSTANTIATE_TEST(SwapChainTests, MetalBackend(), VulkanBackend());
	DAWN_INSTANTIATE_TEST(SwapChainWithAdditionalUsageTests,
	D3D11Backend(),
	D3D12Backend(),
	MetalBackend(),
	NullBackend(),
	VulkanBackend());

	} // anonymous namespace
	} // namespace dawn