/*------------------------------------------------------------------------
 * Vulkan Conformance Tests
 * ------------------------
 *
 * Copyright (c) 2019 The Khronos Group Inc.
 * Copyright (c) 2019 Valve Corporation.
 *
 * 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.
 *
 *//*!
 * \file
 * \brief Tests vkCmdClearAttachments with unused attachments.
 *//*--------------------------------------------------------------------*/

#include "vktRenderPassUnusedClearAttachmentTests.hpp"
#include "pipeline/vktPipelineImageUtil.hpp"
#include "vkQueryUtil.hpp"
#include "vkRefUtil.hpp"
#include "vkCmdUtil.hpp"
#include "vkObjUtil.hpp"
#include "vkImageUtil.hpp"
#include "tcuTextureUtil.hpp"
#include <sstream>
#include <functional>
#include <vector>
#include <string>
#include <memory>

namespace vkt
{
namespace renderpass
{

namespace
{

constexpr size_t	COLOR_ATTACHMENTS_NUMBER	= 4; // maxColorAttachments is guaranteed to be at least 4.
constexpr VkFormat	FORMAT_COLOR				= VK_FORMAT_R8G8B8A8_UNORM;
constexpr VkFormat	FORMAT_DEPTH				= VK_FORMAT_D32_SFLOAT;
constexpr VkFormat	FORMAT_STENCIL				= VK_FORMAT_S8_UINT;
constexpr VkFormat	FORMAT_DEPTH_STENCIL		= VK_FORMAT_D32_SFLOAT_S8_UINT;
const deBool		DE_BOOL_VALUES[]			= { DE_FALSE, DE_TRUE };

enum DepthStencilType
{
	DEPTH_STENCIL_NONE			= 0,
	DEPTH_STENCIL_DEPTH_ONLY	= 1,
	DEPTH_STENCIL_STENCIL_ONLY	= 2,
	DEPTH_STENCIL_BOTH			= 3,
	DEPTH_STENCIL_MAX_ENUM		= 4
};

std::string getFormatBriefName (VkFormat format)
{
	switch (format)
	{
	case VK_FORMAT_D32_SFLOAT:			return "d32";
	case VK_FORMAT_S8_UINT:				return "s8";
	case VK_FORMAT_D32_SFLOAT_S8_UINT:	return "d32s8";
	default:								break;
	}

	return "";
}

std::string depthStencilTypeName (DepthStencilType type, VkFormat format)
{
	DE_ASSERT(type >= DEPTH_STENCIL_NONE && type < DEPTH_STENCIL_MAX_ENUM);

	const std::string formatName = getFormatBriefName(format);

	switch (type)
	{
	case DEPTH_STENCIL_NONE:			return "nods";
	case DEPTH_STENCIL_DEPTH_ONLY:		return "depthonly_" + formatName;
	case DEPTH_STENCIL_STENCIL_ONLY:	return "stencilonly_" + formatName;
	case DEPTH_STENCIL_BOTH:			return "depthstencil_" + formatName;
	default:							return "UNKNOWN";		// Unreachable.
	}

	return "UNKNOWN";											// Unreachable.
}

VkImageAspectFlags getClearAspectMask (DepthStencilType type)
{
	VkImageAspectFlags aspectMask = 0u;

	if (type == DEPTH_STENCIL_DEPTH_ONLY || type == DEPTH_STENCIL_BOTH)
		aspectMask |= VK_IMAGE_ASPECT_DEPTH_BIT;

	if (type == DEPTH_STENCIL_STENCIL_ONLY || type == DEPTH_STENCIL_BOTH)
		aspectMask |= VK_IMAGE_ASPECT_STENCIL_BIT;

	return aspectMask;
}

VkImageAspectFlags getFormatAspectMask (VkFormat format)
{
	const auto			order		= mapVkFormat(format).order;
	VkImageAspectFlags	aspectMask	= 0u;

	if (tcu::hasDepthComponent(order))
		aspectMask |= VK_IMAGE_ASPECT_DEPTH_BIT;

	if (tcu::hasStencilComponent(order))
		aspectMask |= VK_IMAGE_ASPECT_STENCIL_BIT;

	if (!aspectMask)
		aspectMask |= VK_IMAGE_ASPECT_COLOR_BIT;

	return aspectMask;
}

std::vector<VkFormat> getFormats (DepthStencilType type)
{
	DE_ASSERT(type >= DEPTH_STENCIL_NONE && type < DEPTH_STENCIL_MAX_ENUM);

	std::vector<VkFormat> formats;

	if (type != DEPTH_STENCIL_NONE)
		formats.push_back(FORMAT_DEPTH_STENCIL);
	else
		formats.push_back(VK_FORMAT_UNDEFINED);

	if (type == DEPTH_STENCIL_DEPTH_ONLY)
		formats.push_back(FORMAT_DEPTH);
	else if (type == DEPTH_STENCIL_STENCIL_ONLY)
		formats.push_back(FORMAT_STENCIL);

	return formats;
}

bool isDepthOnly(DepthStencilType type)
{
	return (type == DEPTH_STENCIL_DEPTH_ONLY);
}

bool isStencilOnly(DepthStencilType type)
{
	return (type == DEPTH_STENCIL_STENCIL_ONLY);
}

bool hasDepthStencil(DepthStencilType type)
{
	return (type != DEPTH_STENCIL_NONE);
}

struct TestParams
{
	TestParams(size_t numColorAttachments, DepthStencilType depthStencilType_, deBool depthStencilUsed_, VkFormat depthStencilFormat_, RenderPassType renderPassType_)
		: colorUsed(numColorAttachments, DE_FALSE)
		, depthStencilType(depthStencilType_)
		, depthStencilUsed(depthStencilUsed_)
		, depthStencilFormat(depthStencilFormat_)
		, renderPassType(renderPassType_)
		{}

	std::vector<deBool>	colorUsed;
	DepthStencilType	depthStencilType;
	deBool				depthStencilUsed;
	VkFormat		depthStencilFormat;
	RenderPassType		renderPassType;
};

class UnusedClearAttachmentTestInstance : public vkt::TestInstance
{
public:
											UnusedClearAttachmentTestInstance	(Context&			context,
																				 const TestParams&	testParams);
	virtual									~UnusedClearAttachmentTestInstance	(void) {}
	virtual tcu::TestStatus					iterate								(void);
	template<typename RenderpassSubpass>
	void									createCommandBuffer					(const DeviceInterface&	vk,
																				 VkDevice				vkDevice);
private:
	static constexpr deUint32				kImageWidth		= 32;
	static constexpr deUint32				kImageHeight	= 32;
	const tcu::UVec2						m_renderSize	= { kImageWidth, kImageHeight };

	VkClearValue							m_initialColor;
	VkClearValue							m_initialColorDepth;
	VkClearValue							m_clearColor;
	VkClearValue							m_clearColorDepth;

	const TestParams						m_testParams;

	std::vector<Move<VkImage>>				m_colorImages;
	std::vector<de::MovePtr<Allocation>>	m_colorImageAllocs;
	std::vector<Move<VkImageView>>			m_colorAttachmentViews;

	Move<VkImage>							m_depthImage;
	de::MovePtr<Allocation>					m_depthImageAlloc;
	Move<VkImageView>						m_depthAttachmentView;

	Move<VkRenderPass>						m_renderPass;
	Move<VkFramebuffer>						m_framebuffer;
	Move<VkShaderModule>					m_vertexShaderModule;
	Move<VkShaderModule>					m_fragmentShaderModule;
	Move<VkDescriptorSetLayout>				m_descriptorSetLayout;
	Move<VkPipelineLayout>					m_pipelineLayout;
	Move<VkPipeline>						m_graphicsPipeline;
	Move<VkCommandPool>						m_cmdPool;
	Move<VkCommandBuffer>					m_cmdBuffer;
};

class UnusedClearAttachmentTest : public vkt::TestCase
{
public:
										UnusedClearAttachmentTest	(tcu::TestContext&	testContext,
																	 const std::string&	name,
																	 const std::string&	description,
																	 const TestParams&	testParams)
											: vkt::TestCase(testContext, name, description)
											, m_testParams(testParams)
											{}
	virtual								~UnusedClearAttachmentTest	(void) {}
	virtual void						initPrograms				(SourceCollections&	sourceCollections) const;
	virtual TestInstance*				createInstance				(Context&			context) const;
	virtual void						checkSupport				(Context&			context) const;
private:
	const TestParams					m_testParams;
};

void checkFormatSupported(Context& context, VkFormat format, VkImageUsageFlags usage)
{
	VkResult					result;
	VkImageFormatProperties		properties;

	result = context.getInstanceInterface().getPhysicalDeviceImageFormatProperties(
		context.getPhysicalDevice(), format, VK_IMAGE_TYPE_2D, VK_IMAGE_TILING_OPTIMAL, usage, 0, &properties);

	if (result == VK_ERROR_FORMAT_NOT_SUPPORTED)
	{
		std::ostringstream msg;
		msg << "Format " << format << " not supported for usage flags 0x" << std::hex << usage;
		TCU_THROW(NotSupportedError, msg.str());
	}

	VK_CHECK(result);
}

void UnusedClearAttachmentTest::checkSupport (Context& context) const
{
	// Check for renderpass2 extension if used
	if (m_testParams.renderPassType == RENDERPASS_TYPE_RENDERPASS2)
		context.requireDeviceFunctionality("VK_KHR_create_renderpass2");

	// Check support for the needed color, depth and stencil formats.
	if (!m_testParams.colorUsed.empty())
		checkFormatSupported(context, FORMAT_COLOR, VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT);

	if (hasDepthStencil(m_testParams.depthStencilType))
		checkFormatSupported(context, m_testParams.depthStencilFormat, VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT);
}

TestInstance* UnusedClearAttachmentTest::createInstance (Context& context) const
{
	return new UnusedClearAttachmentTestInstance(context, m_testParams);
}

// These shaders are needed to create the graphics pipeline, but they will not be actually used because we will not draw anything.
void UnusedClearAttachmentTest::initPrograms (SourceCollections& sourceCollections) const
{
	// Vertex shader.
	sourceCollections.glslSources.add("vert_shader") << glu::VertexSource(
		"#version 450\n"
		"precision highp float;\n"
		"layout(location = 0) in vec4 position;\n"
		"layout(location = 0) out vec4 vtxColor;\n"
		"void main (void)\n"
		"{\n"
		"\tgl_Position = position;\n"
		"\tvtxColor = vec4(0.5, 0.5, 0.5, 1.0);\n"
		"}\n");

	// Fragment shader.
	std::ostringstream fragmentSource;

	fragmentSource	<< "#version 450\n"
					<< "precision highp float;\n"
					<< "layout(location = 0) in vec4 vtxColor;\n";

	for (size_t i = 0; i < m_testParams.colorUsed.size(); ++i)
	{
		if (m_testParams.colorUsed[i])
			fragmentSource << "layout(location = " << i << ") out vec4 fragColor" << i << ";\n";
	}

	fragmentSource	<< "void main (void)\n"
					<< "{\n";

	for (size_t i = 0; i < m_testParams.colorUsed.size(); ++i)
	{
		if (m_testParams.colorUsed[i])
			fragmentSource << "\tfragColor" << i << " = vtxColor;\n";
	}

	fragmentSource	<< "}\n";

	sourceCollections.glslSources.add("frag_shader") << glu::FragmentSource(fragmentSource.str());
}

// Create a render pass for this use case.
template<typename AttachmentDesc, typename AttachmentRef, typename SubpassDesc, typename SubpassDep, typename RenderPassCreateInfo>
Move<VkRenderPass> createRenderPass (const DeviceInterface&	vk,
									 VkDevice				vkDevice,
									 const TestParams		testParams)
{
	const VkImageAspectFlags	colorAspectMask					= VK_IMAGE_ASPECT_COLOR_BIT;
	const VkImageAspectFlags	dsClearAspectMask				= getClearAspectMask(testParams.depthStencilType);
	const bool					isDepthStencil					= hasDepthStencil(testParams.depthStencilType);

	// Create attachment descriptions.
	const AttachmentDesc		attachmentDescription			(
		DE_NULL,									// const void*						pNext
		(VkAttachmentDescriptionFlags)0,			// VkAttachmentDescriptionFlags		flags
		FORMAT_COLOR,								// VkFormat							format
		VK_SAMPLE_COUNT_1_BIT,						// VkSampleCountFlagBits			samples
		VK_ATTACHMENT_LOAD_OP_LOAD,					// VkAttachmentLoadOp				loadOp
		VK_ATTACHMENT_STORE_OP_STORE,				// VkAttachmentStoreOp				storeOp
		VK_ATTACHMENT_LOAD_OP_DONT_CARE,			// VkAttachmentLoadOp				stencilLoadOp
		VK_ATTACHMENT_STORE_OP_DONT_CARE,			// VkAttachmentStoreOp				stencilStoreOp
		VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,	// VkImageLayout					initialLayout
		VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL	// VkImageLayout					finalLayout
	);
	std::vector<AttachmentDesc>	attachmentDescriptions			(testParams.colorUsed.size(), attachmentDescription);

	if (isDepthStencil)
	{
		const bool					depthOnly		= isDepthOnly(testParams.depthStencilType);
		const bool					stencilOnly		= isStencilOnly(testParams.depthStencilType);
		const VkAttachmentLoadOp	depthLoadOp		= (stencilOnly ? VK_ATTACHMENT_LOAD_OP_DONT_CARE : VK_ATTACHMENT_LOAD_OP_LOAD);
		const VkAttachmentStoreOp	depthStoreOp	= (stencilOnly ? VK_ATTACHMENT_STORE_OP_DONT_CARE : VK_ATTACHMENT_STORE_OP_STORE);
		const VkAttachmentLoadOp	stencilLoadOp	= (depthOnly ? VK_ATTACHMENT_LOAD_OP_DONT_CARE : VK_ATTACHMENT_LOAD_OP_LOAD);
		const VkAttachmentStoreOp	stencilStoreOp	= (depthOnly ? VK_ATTACHMENT_STORE_OP_DONT_CARE : VK_ATTACHMENT_STORE_OP_STORE);

		attachmentDescriptions.emplace_back(
			nullptr,											// const void*						pNext
			(VkAttachmentDescriptionFlags)0,					// VkAttachmentDescriptionFlags		flags
			testParams.depthStencilFormat,						// VkFormat							format
			VK_SAMPLE_COUNT_1_BIT,								// VkSampleCountFlagBits			samples
			depthLoadOp,										// VkAttachmentLoadOp				loadOp
			depthStoreOp,										// VkAttachmentStoreOp				storeOp
			stencilLoadOp,										// VkAttachmentLoadOp				stencilLoadOp
			stencilStoreOp,										// VkAttachmentStoreOp				stencilStoreOp
			VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,	// VkImageLayout					initialLayout
			VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL	// VkImageLayout					finalLayout
		);
	}

	// Mark attachments as used or not depending on the test parameters.
	std::vector<AttachmentRef>		attachmentReferences;
	for (size_t i = 0; i < testParams.colorUsed.size(); ++i)
	{
		attachmentReferences.push_back(AttachmentRef(
			DE_NULL,																		// const void*			pNext
			(testParams.colorUsed[i] ? static_cast<deUint32>(i) : VK_ATTACHMENT_UNUSED),	// deUint32				attachment
			VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,										// VkImageLayout		layout
			colorAspectMask																	// VkImageAspectFlags	aspectMask
		));
	}

	std::unique_ptr<AttachmentRef>	depthAttachmentRef;
	if (isDepthStencil)
	{
		depthAttachmentRef.reset(new AttachmentRef(
			DE_NULL,
			(testParams.depthStencilUsed ? static_cast<deUint32>(testParams.colorUsed.size()) : VK_ATTACHMENT_UNUSED),
			VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
			dsClearAspectMask
		));
	}

	// Create subpass description with the previous color attachment references.
	const SubpassDesc			subpassDescription				(
		DE_NULL,
		(VkSubpassDescriptionFlags)0,											// VkSubpassDescriptionFlags		flags
		VK_PIPELINE_BIND_POINT_GRAPHICS,										// VkPipelineBindPoint				pipelineBindPoint
		0u,																		// deUint32							viewMask
		0u,																		// deUint32							inputAttachmentCount
		DE_NULL,																// const VkAttachmentReference*		pInputAttachments
		static_cast<deUint32>(attachmentReferences.size()),						// deUint32							colorAttachmentCount
		(attachmentReferences.empty() ? DE_NULL : attachmentReferences.data()),	// const VkAttachmentReference*		pColorAttachments
		DE_NULL,																// const VkAttachmentReference*		pResolveAttachments
		(depthAttachmentRef ? depthAttachmentRef.get() : DE_NULL),				// const VkAttachmentReference*		pDepthStencilAttachment
		0u,																		// deUint32							preserveAttachmentCount
		DE_NULL																	// const deUint32*					pPreserveAttachments
	);

	const RenderPassCreateInfo	renderPassInfo					(
		DE_NULL,																	// const void*						pNext
		(VkRenderPassCreateFlags)0,													// VkRenderPassCreateFlags			flags
		static_cast<deUint32>(attachmentDescriptions.size()),						// deUint32							attachmentCount
		(attachmentDescriptions.empty() ? DE_NULL : attachmentDescriptions.data()),	// const VkAttachmentDescription*	pAttachments
		1u,																			// deUint32							subpassCount
		&subpassDescription,														// const VkSubpassDescription*		pSubpasses
		0u,																			// deUint32							dependencyCount
		DE_NULL,																	// const VkSubpassDependency*		pDependencies
		0u,																			// deUint32							correlatedViewMaskCount
		DE_NULL																		// const deUint32*					pCorrelatedViewMasks
	);

	return renderPassInfo.createRenderPass(vk, vkDevice);
}

UnusedClearAttachmentTestInstance::UnusedClearAttachmentTestInstance(Context&			context,
																	 const TestParams&	testParams)
	: vkt::TestInstance(context)
	, m_testParams(testParams)
{
	// Initial color for all images.
	m_initialColor.color.float32[0] = 0.0f;
	m_initialColor.color.float32[1] = 0.0f;
	m_initialColor.color.float32[2] = 0.0f;
	m_initialColor.color.float32[3] = 1.0f;

	m_initialColorDepth.depthStencil.depth = 1.0f;
	m_initialColorDepth.depthStencil.stencil = 0u;

	// Clear color for used attachments.
	m_clearColor.color.float32[0] = 1.0f;
	m_clearColor.color.float32[1] = 1.0f;
	m_clearColor.color.float32[2] = 1.0f;
	m_clearColor.color.float32[3] = 1.0f;

	m_clearColorDepth.depthStencil.depth = 0.0f;
	m_clearColorDepth.depthStencil.stencil = 255u;

	const DeviceInterface&		vk						= m_context.getDeviceInterface();
	const VkDevice				vkDevice				= m_context.getDevice();
	const deUint32				queueFamilyIndex		= m_context.getUniversalQueueFamilyIndex();
	SimpleAllocator				memAlloc				(vk, vkDevice, getPhysicalDeviceMemoryProperties(m_context.getInstanceInterface(), m_context.getPhysicalDevice()));
	const VkComponentMapping	componentMapping		= { VK_COMPONENT_SWIZZLE_IDENTITY, VK_COMPONENT_SWIZZLE_IDENTITY, VK_COMPONENT_SWIZZLE_IDENTITY, VK_COMPONENT_SWIZZLE_IDENTITY };

	// Create color images.
	{
		const VkImageCreateInfo	colorImageParams =
		{
			VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO,									// VkStructureType			sType;
			DE_NULL,																// const void*				pNext;
			0u,																		// VkImageCreateFlags		flags;
			VK_IMAGE_TYPE_2D,														// VkImageType				imageType;
			FORMAT_COLOR,															// VkFormat					format;
			{ kImageWidth, kImageHeight, 1u },										// VkExtent3D				extent;
			1u,																		// deUint32					mipLevels;
			1u,																		// deUint32					arrayLayers;
			VK_SAMPLE_COUNT_1_BIT,													// VkSampleCountFlagBits	samples;
			VK_IMAGE_TILING_OPTIMAL,												// VkImageTiling			tiling;
			VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT
				| VK_IMAGE_USAGE_TRANSFER_DST_BIT,									// VkImageUsageFlags		usage;
			VK_SHARING_MODE_EXCLUSIVE,												// VkSharingMode			sharingMode;
			1u,																		// deUint32					queueFamilyIndexCount;
			&queueFamilyIndex,														// const deUint32*			pQueueFamilyIndices;
			VK_IMAGE_LAYOUT_UNDEFINED												// VkImageLayout			initialLayout;
		};

		const VkImageCreateInfo depthImageParams =
		{
			VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO,											// VkStructureType			sType;
			DE_NULL,																		// const void*				pNext;
			0u,																				// VkImageCreateFlags		flags;
			VK_IMAGE_TYPE_2D,																// VkImageType				imageType;
			m_testParams.depthStencilFormat,												// VkFormat					format;
			{ kImageWidth, kImageHeight, 1u },												// VkExtent3D				extent;
			1u,																				// deUint32					mipLevels;
			1u,																				// deUint32					arrayLayers;
			VK_SAMPLE_COUNT_1_BIT,															// VkSampleCountFlagBits	samples;
			VK_IMAGE_TILING_OPTIMAL,														// VkImageTiling			tiling;
			VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT
				| VK_IMAGE_USAGE_TRANSFER_DST_BIT,											// VkImageUsageFlags		usage;
			VK_SHARING_MODE_EXCLUSIVE,														// VkSharingMode			sharingMode;
			1u,																				// deUint32					queueFamilyIndexCount;
			&queueFamilyIndex,																// const deUint32*			pQueueFamilyIndices;
			VK_IMAGE_LAYOUT_UNDEFINED														// VkImageLayout			initialLayout;
		};

		for (size_t i = 0; i < testParams.colorUsed.size(); ++i)
		{
			// Create, allocate and bind image memory.
			m_colorImages.emplace_back(createImage(vk, vkDevice, &colorImageParams));
			m_colorImageAllocs.emplace_back(memAlloc.allocate(getImageMemoryRequirements(vk, vkDevice, *m_colorImages.back()), MemoryRequirement::Any));
			VK_CHECK(vk.bindImageMemory(vkDevice, *m_colorImages.back(), m_colorImageAllocs.back()->getMemory(), m_colorImageAllocs.back()->getOffset()));

			// Create image view.
			{
				const VkImageViewCreateInfo colorAttachmentViewParams =
				{
					VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO,			// VkStructureType			sType;
					DE_NULL,											// const void*				pNext;
					0u,													// VkImageViewCreateFlags	flags;
					*m_colorImages.back(),								// VkImage					image;
					VK_IMAGE_VIEW_TYPE_2D,								// VkImageViewType			viewType;
					FORMAT_COLOR,										// VkFormat					format;
					componentMapping,									// VkChannelMapping			channels;
					{ VK_IMAGE_ASPECT_COLOR_BIT, 0u, 1u, 0u, 1u }		// VkImageSubresourceRange	subresourceRange;
				};

				m_colorAttachmentViews.emplace_back(createImageView(vk, vkDevice, &colorAttachmentViewParams));
			}

			// Clear image and leave it prepared to be used as a color attachment.
			{
				const VkImageAspectFlags		aspectMask	= VK_IMAGE_ASPECT_COLOR_BIT;
				Move<VkCommandPool>				cmdPool;
				Move<VkCommandBuffer>			cmdBuffer;

				// Create command pool and buffer
				cmdPool		= createCommandPool(vk, vkDevice, VK_COMMAND_POOL_CREATE_TRANSIENT_BIT, queueFamilyIndex);
				cmdBuffer	= allocateCommandBuffer(vk, vkDevice, *cmdPool, VK_COMMAND_BUFFER_LEVEL_PRIMARY);

				// From undefined layout to VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL.
				const VkImageMemoryBarrier preImageBarrier =
				{
					VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER,	// VkStructureType			sType;
					DE_NULL,								// const void*				pNext;
					0u,										// VkAccessFlags			srcAccessMask;
					VK_ACCESS_TRANSFER_WRITE_BIT,			// VkAccessFlags			dstAccessMask;
					VK_IMAGE_LAYOUT_UNDEFINED,				// VkImageLayout			oldLayout;
					VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,	// VkImageLayout			newLayout;
					VK_QUEUE_FAMILY_IGNORED,				// deUint32					srcQueueFamilyIndex;
					VK_QUEUE_FAMILY_IGNORED,				// deUint32					dstQueueFamilyIndex;
					*m_colorImages.back(),					// VkImage					image;
					{										// VkImageSubresourceRange	subresourceRange;
						aspectMask,							// VkImageAspect			aspect;
						0u,									// deUint32					baseMipLevel;
						1u,									// deUint32					mipLevels;
						0u,									// deUint32					baseArraySlice;
						1u									// deUint32					arraySize;
					}
				};

				// From VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL to VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL.
				const VkImageMemoryBarrier postImageBarrier =
				{
					VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER,		// VkStructureType			sType;
					DE_NULL,									// const void*				pNext;
					VK_ACCESS_TRANSFER_WRITE_BIT,				// VkAccessFlags			srcAccessMask;
					VK_ACCESS_SHADER_READ_BIT,					// VkAccessFlags			dstAccessMask;
					VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,		// VkImageLayout			oldLayout;
					VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,	// VkImageLayout			newLayout;
					VK_QUEUE_FAMILY_IGNORED,					// deUint32					srcQueueFamilyIndex;
					VK_QUEUE_FAMILY_IGNORED,					// deUint32					dstQueueFamilyIndex;
					*m_colorImages.back(),						// VkImage					image;
					{											// VkImageSubresourceRange	subresourceRange;
						aspectMask,								// VkImageAspect			aspect;
						0u,										// deUint32					baseMipLevel;
						1u,										// deUint32					mipLevels;
						0u,										// deUint32					baseArraySlice;
						1u										// deUint32					arraySize;
					}
				};

				const VkImageSubresourceRange clearRange	=
				{
					aspectMask,	// VkImageAspectFlags	aspectMask;
					0u,			// deUint32				baseMipLevel;
					1u,			// deUint32				levelCount;
					0u,			// deUint32				baseArrayLayer;
					1u			// deUint32				layerCount;
				};

				// Clear image and transfer layout.
				beginCommandBuffer(vk, *cmdBuffer);
					vk.cmdPipelineBarrier(*cmdBuffer, VK_PIPELINE_STAGE_HOST_BIT, VK_PIPELINE_STAGE_TRANSFER_BIT, (VkDependencyFlags)0, 0, (const VkMemoryBarrier*)DE_NULL, 0, (const VkBufferMemoryBarrier*)DE_NULL, 1, &preImageBarrier);
					vk.cmdClearColorImage(*cmdBuffer, *m_colorImages.back(), VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, &m_initialColor.color, 1, &clearRange);
					vk.cmdPipelineBarrier(*cmdBuffer, VK_PIPELINE_STAGE_TRANSFER_BIT, VK_PIPELINE_STAGE_ALL_GRAPHICS_BIT, (VkDependencyFlags)0, 0, (const VkMemoryBarrier*)DE_NULL, 0, (const VkBufferMemoryBarrier*)DE_NULL, 1, &postImageBarrier);
				endCommandBuffer(vk, *cmdBuffer);

				submitCommandsAndWait(vk, vkDevice, m_context.getUniversalQueue(), cmdBuffer.get());
			}
		}

		if (hasDepthStencil(m_testParams.depthStencilType))
		{
			const VkImageAspectFlags clearAspectMask	= getClearAspectMask(m_testParams.depthStencilType);
			const VkImageAspectFlags formatAspectMask	= getFormatAspectMask(m_testParams.depthStencilFormat);

			// Create, allocate and bind image memory.
			m_depthImage = createImage(vk, vkDevice, &depthImageParams);
			m_depthImageAlloc = memAlloc.allocate(getImageMemoryRequirements(vk, vkDevice, *m_depthImage), MemoryRequirement::Any);
			VK_CHECK(vk.bindImageMemory(vkDevice, *m_depthImage, m_depthImageAlloc->getMemory(), m_depthImageAlloc->getOffset()));

			// Create image view.
			{
				const VkImageViewCreateInfo depthAttachmentViewParams =
				{
					VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO,	// VkStructureType			sType;
					DE_NULL,									// const void*				pNext;
					0u,											// VkImageViewCreateFlags	flags;
					*m_depthImage,								// VkImage					image;
					VK_IMAGE_VIEW_TYPE_2D,						// VkImageViewType			viewType;
					m_testParams.depthStencilFormat,			// VkFormat					format;
					componentMapping,							// VkChannelMapping			channels;
					{ clearAspectMask, 0u, 1u, 0u, 1u }			// VkImageSubresourceRange	subresourceRange;
				};

				m_depthAttachmentView = createImageView(vk, vkDevice, &depthAttachmentViewParams);
			}

			// Clear image and leave it prepared to be used as a depth/stencil attachment.
			{
				Move<VkCommandPool>				cmdPool;
				Move<VkCommandBuffer>			cmdBuffer;

				// Create command pool and buffer
				cmdPool		= createCommandPool(vk, vkDevice, VK_COMMAND_POOL_CREATE_TRANSIENT_BIT, queueFamilyIndex);
				cmdBuffer	= allocateCommandBuffer(vk, vkDevice, *cmdPool, VK_COMMAND_BUFFER_LEVEL_PRIMARY);

				// From undefined layout to VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL.
				const VkImageMemoryBarrier		preImageBarrier =
				{
					VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER,	// VkStructureType			sType;
					DE_NULL,								// const void*				pNext;
					0u,										// VkAccessFlags			srcAccessMask;
					VK_ACCESS_TRANSFER_WRITE_BIT,			// VkAccessFlags			dstAccessMask;
					VK_IMAGE_LAYOUT_UNDEFINED,				// VkImageLayout			oldLayout;
					VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,	// VkImageLayout			newLayout;
					VK_QUEUE_FAMILY_IGNORED,				// deUint32					srcQueueFamilyIndex;
					VK_QUEUE_FAMILY_IGNORED,				// deUint32					dstQueueFamilyIndex;
					*m_depthImage,							// VkImage					image;
					{										// VkImageSubresourceRange	subresourceRange;
						formatAspectMask,					// VkImageAspect			aspect;
						0u,									// deUint32					baseMipLevel;
						1u,									// deUint32					mipLevels;
						0u,									// deUint32					baseArraySlice;
						1u									// deUint32					arraySize;
					}
				};

				// From VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL to VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL.
				const VkImageMemoryBarrier		postImageBarrier =
				{
					VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER,				// VkStructureType			sType;
					DE_NULL,											// const void*				pNext;
					VK_ACCESS_TRANSFER_WRITE_BIT,						// VkAccessFlags			srcAccessMask;
					VK_ACCESS_SHADER_READ_BIT,							// VkAccessFlags			dstAccessMask;
					VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,				// VkImageLayout			oldLayout;
					VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,	// VkImageLayout			newLayout;
					VK_QUEUE_FAMILY_IGNORED,							// deUint32					srcQueueFamilyIndex;
					VK_QUEUE_FAMILY_IGNORED,							// deUint32					dstQueueFamilyIndex;
					*m_depthImage,										// VkImage					image;
					{													// VkImageSubresourceRange	subresourceRange;
						formatAspectMask,								// VkImageAspect			aspect;
						0u,												// deUint32					baseMipLevel;
						1u,												// deUint32					mipLevels;
						0u,												// deUint32					baseArraySlice;
						1u												// deUint32					arraySize;
					}
				};

				const VkImageSubresourceRange	clearRange	=
				{
					clearAspectMask,	// VkImageAspectFlags	aspectMask;
					0u,					// deUint32				baseMipLevel;
					1u,					// deUint32				levelCount;
					0u,					// deUint32				baseArrayLayer;
					1u					// deUint32				layerCount;
				};

				// Clear image and transfer layout.
				beginCommandBuffer(vk, *cmdBuffer);
					vk.cmdPipelineBarrier(*cmdBuffer, VK_PIPELINE_STAGE_HOST_BIT, VK_PIPELINE_STAGE_TRANSFER_BIT, (VkDependencyFlags)0, 0, (const VkMemoryBarrier*)DE_NULL, 0, (const VkBufferMemoryBarrier*)DE_NULL, 1, &preImageBarrier);
					vk.cmdClearDepthStencilImage(*cmdBuffer, *m_depthImage, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, &m_initialColorDepth.depthStencil, 1, &clearRange);
					vk.cmdPipelineBarrier(*cmdBuffer, VK_PIPELINE_STAGE_TRANSFER_BIT, VK_PIPELINE_STAGE_ALL_GRAPHICS_BIT, (VkDependencyFlags)0, 0, (const VkMemoryBarrier*)DE_NULL, 0, (const VkBufferMemoryBarrier*)DE_NULL, 1, &postImageBarrier);
				endCommandBuffer(vk, *cmdBuffer);

				submitCommandsAndWait(vk, vkDevice, m_context.getUniversalQueue(), cmdBuffer.get());
			}
		}
	}

	// Create render pass.
	if (testParams.renderPassType == RENDERPASS_TYPE_LEGACY)
		m_renderPass = createRenderPass<AttachmentDescription1, AttachmentReference1, SubpassDescription1, SubpassDependency1, RenderPassCreateInfo1>(vk, vkDevice, testParams);
	else
		m_renderPass = createRenderPass<AttachmentDescription2, AttachmentReference2, SubpassDescription2, SubpassDependency2, RenderPassCreateInfo2>(vk, vkDevice, testParams);

	// Create framebuffer
	{
		std::vector<VkImageView>		imageViews;

		for (auto& movePtr : m_colorAttachmentViews)
			imageViews.push_back(movePtr.get());

		if (hasDepthStencil(m_testParams.depthStencilType))
			imageViews.push_back(m_depthAttachmentView.get());

		const VkFramebufferCreateInfo	framebufferParams	=
		{
			VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO,			// VkStructureType			sType;
			DE_NULL,											// const void*				pNext;
			0u,													// VkFramebufferCreateFlags	flags;
			*m_renderPass,										// VkRenderPass				renderPass;
			static_cast<deUint32>(imageViews.size()),			// deUint32					attachmentCount;
			(imageViews.empty() ? DE_NULL : imageViews.data()),	// const VkImageView*		pAttachments;
			kImageWidth,										// deUint32					width;
			kImageHeight,										// deUint32					height;
			1u													// deUint32					layers;
		};

		m_framebuffer = createFramebuffer(vk, vkDevice, &framebufferParams);
	}

	// Create pipeline layout for subpass 0.
	{
		const VkDescriptorSetLayoutCreateInfo	descriptorSetLayoutParams	=
		{
			VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO,	// VkStructureType						sType
			DE_NULL,												// const void*							pNext
			0u,														// VkDescriptorSetLayoutCreateFlags		flags
			0u,														// deUint32								bindingCount
			DE_NULL													// const VkDescriptorSetLayoutBinding*	pBindings
		};
		m_descriptorSetLayout = createDescriptorSetLayout(vk, vkDevice, &descriptorSetLayoutParams);

		const VkPipelineLayoutCreateInfo		pipelineLayoutParams		=
		{
			VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO,		// VkStructureType					sType;
			DE_NULL,											// const void*						pNext;
			0u,													// VkPipelineLayoutCreateFlags		flags;
			1u,													// deUint32							setLayoutCount;
			&m_descriptorSetLayout.get(),						// const VkDescriptorSetLayout*		pSetLayouts;
			0u,													// deUint32							pushConstantRangeCount;
			DE_NULL												// const VkPushConstantRange*		pPushConstantRanges;
		};

		m_pipelineLayout = createPipelineLayout(vk, vkDevice, &pipelineLayoutParams);
	}

	m_vertexShaderModule	= createShaderModule(vk, vkDevice, m_context.getBinaryCollection().get("vert_shader"), 0);
	m_fragmentShaderModule	= createShaderModule(vk, vkDevice, m_context.getBinaryCollection().get("frag_shader"), 0);

	// Create pipeline.
	{
		const std::vector<VkViewport>						viewports						(1, makeViewport(m_renderSize));
		const std::vector<VkRect2D>							scissors						(1, makeRect2D(m_renderSize));

		const VkPipelineColorBlendAttachmentState			colorBlendAttachmentState		=
		{
			VK_FALSE,					// VkBool32					blendEnable
			VK_BLEND_FACTOR_ZERO,		// VkBlendFactor			srcColorBlendFactor
			VK_BLEND_FACTOR_ZERO,		// VkBlendFactor			dstColorBlendFactor
			VK_BLEND_OP_ADD,			// VkBlendOp				colorBlendOp
			VK_BLEND_FACTOR_ZERO,		// VkBlendFactor			srcAlphaBlendFactor
			VK_BLEND_FACTOR_ZERO,		// VkBlendFactor			dstAlphaBlendFactor
			VK_BLEND_OP_ADD,			// VkBlendOp				alphaBlendOp
			VK_COLOR_COMPONENT_R_BIT	// VkColorComponentFlags	colorWriteMask
			| VK_COLOR_COMPONENT_G_BIT
			| VK_COLOR_COMPONENT_B_BIT
			| VK_COLOR_COMPONENT_A_BIT
		};

		std::vector<VkPipelineColorBlendAttachmentState>	colorBlendAttachmentStates;
		for (size_t i = 0; i < testParams.colorUsed.size(); ++i)
			colorBlendAttachmentStates.push_back(colorBlendAttachmentState);

		const VkPipelineColorBlendStateCreateInfo			colorBlendStateCreateInfo		=
		{
			VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO,							// VkStructureType								sType
			DE_NULL,																			// const void*									pNext
			0u,																					// VkPipelineColorBlendStateCreateFlags			flags
			VK_FALSE,																			// VkBool32										logicOpEnable
			VK_LOGIC_OP_CLEAR,																	// VkLogicOp									logicOp
			static_cast<deUint32>(colorBlendAttachmentStates.size()),							// deUint32										attachmentCount
			(colorBlendAttachmentStates.empty() ? DE_NULL : colorBlendAttachmentStates.data()),	// const VkPipelineColorBlendAttachmentState*	pAttachments
			{ 0.0f, 0.0f, 0.0f, 0.0f }															// float										blendConstants[4]
		};

		m_graphicsPipeline = makeGraphicsPipeline(vk,									// const DeviceInterface&							vk
												  vkDevice,								// const VkDevice									device
												  *m_pipelineLayout,					// const VkPipelineLayout							pipelineLayout
												  *m_vertexShaderModule,				// const VkShaderModule								vertexShaderModule
												  DE_NULL,								// const VkShaderModule								tessellationControlModule
												  DE_NULL,								// const VkShaderModule								tessellationEvalModule
												  DE_NULL,								// const VkShaderModule								geometryShaderModule
												  *m_fragmentShaderModule,				// const VkShaderModule								fragmentShaderModule
												  *m_renderPass,						// const VkRenderPass								renderPass
												  viewports,							// const std::vector<VkViewport>&					viewports
												  scissors,								// const std::vector<VkRect2D>&						scissors
												  VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST,	// const VkPrimitiveTopology						topology
												  0u,									// const deUint32									subpass
												  0u,									// const deUint32									patchControlPoints
												  DE_NULL,								// const VkPipelineVertexInputStateCreateInfo*		vertexInputStateCreateInfo
												  DE_NULL,								// const VkPipelineRasterizationStateCreateInfo*	rasterizationStateCreateInfo
												  DE_NULL,								// const VkPipelineMultisampleStateCreateInfo*		multisampleStateCreateInfo
												  DE_NULL,								// const VkPipelineDepthStencilStateCreateInfo*		depthStencilStateCreateInfo
												  &colorBlendStateCreateInfo);			// const VkPipelineColorBlendStateCreateInfo*		colorBlendStateCreateInfo
	}

	// Create command pool
	m_cmdPool = createCommandPool(vk, vkDevice, VK_COMMAND_POOL_CREATE_TRANSIENT_BIT, queueFamilyIndex);

	// Create command buffer
	if (testParams.renderPassType == RENDERPASS_TYPE_LEGACY)
		createCommandBuffer<RenderpassSubpass1>(vk, vkDevice);
	else
		createCommandBuffer<RenderpassSubpass2>(vk, vkDevice);
}

template <typename RenderpassSubpass>
void UnusedClearAttachmentTestInstance::createCommandBuffer (const DeviceInterface&	vk,
															 VkDevice				vkDevice)
{
	const typename RenderpassSubpass::SubpassBeginInfo	subpassBeginInfo	(DE_NULL, VK_SUBPASS_CONTENTS_INLINE);
	const typename RenderpassSubpass::SubpassEndInfo	subpassEndInfo		(DE_NULL);

	const VkRenderPassBeginInfo							renderPassBeginInfo	=
	{
		VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO,	// VkStructureType		sType;
		DE_NULL,									// const void*			pNext;
		*m_renderPass,								// VkRenderPass			renderPass;
		*m_framebuffer,								// VkFramebuffer		framebuffer;
		makeRect2D(m_renderSize),					// VkRect2D				renderArea;
		0u,											// uint32_t				clearValueCount;
		DE_NULL										// const VkClearValue*	pClearValues;
	};

	m_cmdBuffer = allocateCommandBuffer(vk, vkDevice, *m_cmdPool, VK_COMMAND_BUFFER_LEVEL_PRIMARY);

	const VkClearRect									clearRect			=
	{
		{												// VkRect2D		rect;
			{ 0, 0, },									//	VkOffset2D	offset;
			{ kImageWidth, kImageHeight }				//	VkExtent2D	extent;
		},
		0u,												// uint32_t		baseArrayLayer;
		1u												// uint32_t		layerCount;
	};

	std::vector<VkClearAttachment> clearAttachments;
	for (size_t i = 0; i < m_testParams.colorUsed.size(); ++i)
	{
		const VkClearAttachment clearAttachment = {
			VK_IMAGE_ASPECT_COLOR_BIT,	// VkImageAspectFlags	aspectMask;
			static_cast<deUint32>(i),	// uint32_t				colorAttachment;
			m_clearColor				// VkClearValue			clearValue;
		};
		clearAttachments.push_back(clearAttachment);
	}

	if (hasDepthStencil(m_testParams.depthStencilType))
	{
		const VkClearAttachment clearAttachment = {
			getClearAspectMask(m_testParams.depthStencilType),	// VkImageAspectFlags	aspectMask;
			0u,													// uint32_t				colorAttachment;
			m_clearColorDepth									// VkClearValue			clearValue;
		};
		clearAttachments.push_back(clearAttachment);
	}

	beginCommandBuffer(vk, *m_cmdBuffer, 0u);
		RenderpassSubpass::cmdBeginRenderPass(vk, *m_cmdBuffer, &renderPassBeginInfo, &subpassBeginInfo);
		vk.cmdBindPipeline(*m_cmdBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, *m_graphicsPipeline);
		vk.cmdClearAttachments(*m_cmdBuffer, static_cast<deUint32>(clearAttachments.size()), (clearAttachments.empty() ? DE_NULL : clearAttachments.data()), 1u, &clearRect);
		RenderpassSubpass::cmdEndRenderPass(vk, *m_cmdBuffer, &subpassEndInfo);
	endCommandBuffer(vk, *m_cmdBuffer);
}

tcu::TestStatus	UnusedClearAttachmentTestInstance::iterate (void)
{
	const DeviceInterface&	vk					= m_context.getDeviceInterface();
	const VkDevice			vkDevice			= m_context.getDevice();
	const VkQueue			queue				= m_context.getUniversalQueue();
	const deUint32			queueFamilyIndex	= m_context.getUniversalQueueFamilyIndex();
	SimpleAllocator			allocator			(vk, vkDevice, getPhysicalDeviceMemoryProperties(m_context.getInstanceInterface(), m_context.getPhysicalDevice()));

	submitCommandsAndWait(vk, vkDevice, queue, m_cmdBuffer.get());

	// Read result images.
	std::vector<de::MovePtr<tcu::TextureLevel>> imagePixels;
	for (size_t i = 0; i < m_testParams.colorUsed.size(); ++i)
		imagePixels.emplace_back(pipeline::readColorAttachment(vk, vkDevice, queue, queueFamilyIndex, allocator, *m_colorImages[i], FORMAT_COLOR, m_renderSize).release());

	// Verify pixel colors match.
	for (size_t i = 0; i < imagePixels.size(); ++i)
	{
		const tcu::ConstPixelBufferAccess&	imageAccess		= imagePixels[i]->getAccess();
		const float*						refColor		= (m_testParams.colorUsed[i] ? m_clearColor.color.float32 : m_initialColor.color.float32);

		for (int y = 0; y < imageAccess.getHeight(); ++y)
		for (int x = 0; x < imageAccess.getWidth(); ++x)
		{
			const tcu::Vec4	color = imageAccess.getPixel(x, y);

			for (deUint32 cpnt = 0; cpnt < 4; ++cpnt)
				if (de::abs(color[cpnt] - refColor[cpnt]) > 0.01f)
				{
					std::ostringstream msg;

					msg << "Attachment " << i << " with mismatched pixel (" << x << ", " << y << "): expecting pixel value [";
					for (deUint32 j = 0; j < 4; ++j)
						msg << ((j == 0) ? "" : ", ") << refColor[j];
					msg << "] and found [";
					for (deUint32 j = 0; j < 4; ++j)
						msg << ((j == 0) ? "" : ", ") << color[j];
					msg << "]";

					return tcu::TestStatus::fail(msg.str());
				}
		}
	}

	if (hasDepthStencil(m_testParams.depthStencilType))
	{
		const bool depthOnly	= isDepthOnly(m_testParams.depthStencilType);
		const bool stencilOnly	= isStencilOnly(m_testParams.depthStencilType);

		if (!stencilOnly)
		{
			de::MovePtr<tcu::TextureLevel>		depthPixels	= pipeline::readDepthAttachment(vk, vkDevice, queue, queueFamilyIndex, allocator, *m_depthImage, m_testParams.depthStencilFormat, m_renderSize);
			const tcu::ConstPixelBufferAccess&	depthAccess	= depthPixels->getAccess();
			const float							refDepth	= (m_testParams.depthStencilUsed ? m_clearColorDepth.depthStencil.depth : m_initialColorDepth.depthStencil.depth);

			for (int y = 0; y < depthAccess.getHeight(); ++y)
			for (int x = 0; x < depthAccess.getWidth(); ++x)
			{
				const float value = depthAccess.getPixDepth(x, y);
				if (de::abs(value - refDepth) > 0.001f)
				{
					std::ostringstream msg;

					msg << "Depth/stencil attachment with mismatched depth value at pixel ("
						<< x << ", " << y << "): expected value " << refDepth << " and found " << value;
					return tcu::TestStatus::fail(msg.str());
				}
			}
		}

		if (!depthOnly)
		{
			// Note read*Attachment leaves the attachment in the VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL layout, so the current layout
			// depends on if we have previously read the depth aspect or not.
			const VkImageLayout					currentLayout	= (stencilOnly ? VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL : VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL);
			de::MovePtr<tcu::TextureLevel>		stencilPixels	= pipeline::readStencilAttachment(vk, vkDevice, queue, queueFamilyIndex, allocator, *m_depthImage, m_testParams.depthStencilFormat, m_renderSize, currentLayout);
			const tcu::ConstPixelBufferAccess&	stencilAccess	= stencilPixels->getAccess();
			const deUint32						refStencil		= (m_testParams.depthStencilUsed ? m_clearColorDepth.depthStencil.stencil : m_initialColorDepth.depthStencil.stencil);

			for (int y = 0; y < stencilAccess.getHeight(); ++y)
			for (int x = 0; x < stencilAccess.getWidth(); ++x)
			{
				const int value = stencilAccess.getPixStencil(x, y);
				if (value < 0 || static_cast<deUint32>(value) != refStencil)
				{
					std::ostringstream msg;

					msg << "Depth/stencil attachment with mismatched stencil value at pixel ("
						<< x << ", " << y << "): expected value " << refStencil << " and found " << value;
					return tcu::TestStatus::fail(msg.str());
				}
			}
		}
	}

	return tcu::TestStatus::pass("Pass");
}


using CallbackFunction = std::function<void(const std::vector<deBool>&)>;

void runCallbackOnCombination(std::vector<deBool>& array, size_t current_index, CallbackFunction callback)
{
	DE_ASSERT(current_index < array.size());
	for (size_t i = 0; i < DE_LENGTH_OF_ARRAY(DE_BOOL_VALUES); ++i)
	{
		array[current_index] = DE_BOOL_VALUES[i];
		if (current_index == array.size() - 1)
			callback(array);
		else
			runCallbackOnCombination(array, current_index + 1, callback);
	}
}

void runCallbackOnCombination(std::vector<deBool>& array, CallbackFunction callback)
{
	runCallbackOnCombination(array, 0, callback);
}

std::string getUsed(deBool value)
{
	return (value ? "used" : "unused");
}

std::string getCombName(const std::vector<deBool>& array)
{
	std::ostringstream name;
	for (size_t i = 0; i < array.size(); ++i)
		name << ((i == 0)? "" : "_") << "color" << getUsed(array[i]);
	return name.str();
}

} // anonymous


tcu::TestCaseGroup* createRenderPassUnusedClearAttachmentTests (tcu::TestContext& testCtx, const RenderPassType renderPassType)
{
	de::MovePtr<tcu::TestCaseGroup>	testGroup (new tcu::TestCaseGroup(testCtx, "unused_clear_attachments", "Unused attachments with vkCmdClearAttachments"));

	for (int depthStencilType = 0; depthStencilType < DEPTH_STENCIL_MAX_ENUM; ++depthStencilType)
	{
		const DepthStencilType	dsType		= static_cast<DepthStencilType>(depthStencilType);
		const auto				dsFormats	= getFormats(dsType);

		for (const auto dsFormat : dsFormats)
		{
			for (size_t i = 0; i < DE_LENGTH_OF_ARRAY(DE_BOOL_VALUES); ++i)
			{
				const deBool			depthStencilUse	= DE_BOOL_VALUES[i];
				const std::string		dsCase			= depthStencilTypeName(dsType, dsFormat);
				std::vector<TestParams>	testTypes;

				if (hasDepthStencil(dsType))
					testTypes.emplace_back(0, dsType, depthStencilUse, dsFormat, renderPassType);						// No color attachments.
				testTypes.emplace_back(1, dsType, depthStencilUse, dsFormat, renderPassType);							// Single color attachment.
				testTypes.emplace_back(COLOR_ATTACHMENTS_NUMBER, dsType, depthStencilUse, dsFormat, renderPassType);	// Multiple color attachments.

				for (auto& params : testTypes)
				{
					if (!params.colorUsed.empty())
					{
						runCallbackOnCombination(params.colorUsed, [&](const std::vector<deBool>& array) {
							std::string name = getCombName(array) + "_" + dsCase;
							if (hasDepthStencil(dsType))
								name += std::string("_") + getUsed(depthStencilUse);
							testGroup->addChild(new UnusedClearAttachmentTest(testCtx, name, "", params));
						});
					}
					else
					{
						std::string name = dsCase + "_" + getUsed(depthStencilUse);
						testGroup->addChild(new UnusedClearAttachmentTest(testCtx, name, "", params));
					}

				}

				if (!hasDepthStencil(dsType))
					break;
			}
		}
	}

	return testGroup.release();
}

} // renderpass
} // vkt