/*------------------------------------------------------------------------
 * Vulkan Conformance Tests
 * ------------------------
 *
 * Copyright (c) 2017 The Khronos Group Inc.
 *
 * 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  vktImageTranscodingSupportTests.cpp
 * \brief Transcoding support tests
 *//*--------------------------------------------------------------------*/

#include "vktImageTranscodingSupportTests.hpp"

#include "deUniquePtr.hpp"
#include "deStringUtil.hpp"
#include "deSharedPtr.hpp"
#include "deRandom.hpp"

#include "vktTestCaseUtil.hpp"
#include "vkPrograms.hpp"
#include "vkImageUtil.hpp"
#include "vktImageTestsUtil.hpp"
#include "vkBarrierUtil.hpp"
#include "vkBuilderUtil.hpp"
#include "vkRef.hpp"
#include "vkRefUtil.hpp"
#include "vkTypeUtil.hpp"
#include "vkQueryUtil.hpp"
#include "vkCmdUtil.hpp"
#include "vkObjUtil.hpp"

#include "tcuTextureUtil.hpp"
#include "tcuTexture.hpp"
#include "tcuCompressedTexture.hpp"
#include "tcuVectorType.hpp"
#include "tcuResource.hpp"
#include "tcuImageIO.hpp"
#include "tcuImageCompare.hpp"
#include "tcuTestLog.hpp"
#include "tcuRGBA.hpp"
#include "tcuSurface.hpp"
#include "tcuFloat.hpp"

#include <vector>
#include <iomanip>

using namespace vk;
namespace vkt
{
namespace image
{
namespace
{
using std::string;
using std::vector;
using tcu::TestContext;
using tcu::TestStatus;
using tcu::UVec3;
using tcu::IVec3;
using tcu::CompressedTexFormat;
using tcu::CompressedTexture;
using tcu::Resource;
using tcu::Archive;
using tcu::ConstPixelBufferAccess;
using de::MovePtr;
using de::SharedPtr;
using de::Random;

enum Operation
{
	OPERATION_ATTACHMENT_READ,
	OPERATION_ATTACHMENT_WRITE,
	OPERATION_TEXTURE_READ,
	OPERATION_TEXTURE_WRITE,
	OPERATION_LAST
};

struct TestParameters
{
	Operation				operation;
	UVec3					size;
	ImageType				imageType;
	VkImageUsageFlagBits	testedImageUsageFeature;
	VkFormat				featuredFormat;
	VkFormat				featurelessFormat;
	VkImageUsageFlags		testedImageUsage;
	VkImageUsageFlags		pairedImageUsage;
	const VkFormat*			compatibleFormats;
};

const deUint32 SINGLE_LEVEL = 1u;
const deUint32 SINGLE_LAYER = 1u;

class BasicTranscodingTestInstance : public TestInstance
{
public:
							BasicTranscodingTestInstance	(Context&				context,
															 const TestParameters&	parameters);
	virtual TestStatus		iterate							(void) = 0;
protected:
	void					generateData					(deUint8*				toFill,
															 size_t					size,
															 const VkFormat			format = VK_FORMAT_UNDEFINED);
	const TestParameters	m_parameters;
};

BasicTranscodingTestInstance::BasicTranscodingTestInstance (Context& context, const TestParameters& parameters)
	: TestInstance	(context)
	, m_parameters	(parameters)
{
}

// Replace Infs and NaNs with the largest normal value.
// Replace denormal numbers with the smallest normal value.
// Leave the rest untouched.
// T is a tcu::Float specialization.
template <class T>
void fixFloatIfNeeded(deUint8* ptr_)
{
	T* ptr = reinterpret_cast<T*>(ptr_);
	if (ptr->isInf() || ptr->isNaN())
		*ptr = T::largestNormal(ptr->sign());
	else if (ptr->isDenorm())
		*ptr = T::smallestNormal(ptr->sign());
}

void BasicTranscodingTestInstance::generateData (deUint8* toFill, size_t size, const VkFormat format)
{
	const deUint8 pattern[] =
	{
		// 64-bit values
		0x11, 0x11, 0x11, 0x11, 0x22, 0x22, 0x22, 0x22,
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
		0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF,
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x00,
		0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00, 0xFF, 0x00, 0x00, 0x00,
		0x7F, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		// Positive infinity
		0xFF, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		// Negative infinity
		0x7F, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,		// Start of a signalling NaN (NANS)
		0x7F, 0xF7, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,		// End of a signalling NaN (NANS)
		0xFF, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,		// Start of a signalling NaN (NANS)
		0xFF, 0xF7, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,		// End of a signalling NaN (NANS)
		0x7F, 0xF8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		// Start of a quiet NaN (NANQ)
		0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,		// End of of a quiet NaN (NANQ)
		0xFF, 0xF8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		// Start of a quiet NaN (NANQ)
		0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,		// End of a quiet NaN (NANQ)
		// 32-bit values
		0x7F, 0x80, 0x00, 0x00,								// Positive infinity
		0xFF, 0x80, 0x00, 0x00,								// Negative infinity
		0x7F, 0x80, 0x00, 0x01,								// Start of a signalling NaN (NANS)
		0x7F, 0xBF, 0xFF, 0xFF,								// End of a signalling NaN (NANS)
		0xFF, 0x80, 0x00, 0x01,								// Start of a signalling NaN (NANS)
		0xFF, 0xBF, 0xFF, 0xFF,								// End of a signalling NaN (NANS)
		0x7F, 0xC0, 0x00, 0x00,								// Start of a quiet NaN (NANQ)
		0x7F, 0xFF, 0xFF, 0xFF,								// End of of a quiet NaN (NANQ)
		0xFF, 0xC0, 0x00, 0x00,								// Start of a quiet NaN (NANQ)
		0xFF, 0xFF, 0xFF, 0xFF,								// End of a quiet NaN (NANQ)
		0xAA, 0xAA, 0xAA, 0xAA,
		0x55, 0x55, 0x55, 0x55,
	};

	deUint8*	start		= toFill;
	size_t		sizeToRnd	= size;

	// Pattern part
	if (size >= 2 * sizeof(pattern))
	{
		// Rotated pattern
		for (size_t i = 0; i < sizeof(pattern); i++)
			start[sizeof(pattern) - i - 1] = pattern[i];

		start		+= sizeof(pattern);
		sizeToRnd	-= sizeof(pattern);

		// Direct pattern
		deMemcpy(start, pattern, sizeof(pattern));

		start		+= sizeof(pattern);
		sizeToRnd	-= sizeof(pattern);
	}

	// Random part
	{
		DE_ASSERT(sizeToRnd % sizeof(deUint32) == 0);

		deUint32*	start32		= reinterpret_cast<deUint32*>(start);
		size_t		sizeToRnd32	= sizeToRnd / sizeof(deUint32);
		Random		rnd			(static_cast<deUint32>(format));

		for (size_t i = 0; i < sizeToRnd32; i++)
			start32[i] = rnd.getUint32();
	}

	{
		// Remove certain values that may not be preserved based on the uncompressed view format
		if (isSnormFormat(m_parameters.featuredFormat))
		{
			tcu::TextureFormat textureFormat = mapVkFormat(m_parameters.featuredFormat);

			if (textureFormat.type == tcu::TextureFormat::SNORM_INT8)
			{
				for (size_t i = 0; i < size; i++)
				{
					// SNORM fix: due to write operation in SNORM format
					// replaces 0x80 to 0x81, remove these values from test
					if (toFill[i] == 0x80)
						toFill[i] = 0x81;
				}
			}
			else
			{
				for (size_t i = 0; i < size; i += 2)
				{
					// SNORM fix: due to write operation in SNORM format
					// replaces 0x00 0x80 to 0x01 0x80
					if (toFill[i] == 0x00 && toFill[i+1] == 0x80)
						toFill[i+1] = 0x81;
				}
			}
		}
		else if (isFloatFormat(m_parameters.featuredFormat))
		{
			tcu::TextureFormat textureFormat = mapVkFormat(m_parameters.featuredFormat);

			if (textureFormat.type == tcu::TextureFormat::HALF_FLOAT)
			{
				for (size_t i = 0; i < size; i += 2)
					fixFloatIfNeeded<tcu::Float16>(toFill + i);
			}
			else if (textureFormat.type == tcu::TextureFormat::FLOAT)
			{
				for (size_t i = 0; i < size; i += 4)
					fixFloatIfNeeded<tcu::Float16>(toFill + i);

				for (size_t i = 0; i < size; i += 4)
					fixFloatIfNeeded<tcu::Float32>(toFill + i);
			}
		}
	}
}

class GraphicsAttachmentsTestInstance : public BasicTranscodingTestInstance
{
public:
									GraphicsAttachmentsTestInstance	(Context& context, const TestParameters& parameters);
	virtual TestStatus				iterate							(void);

protected:
	VkImageCreateInfo				makeCreateImageInfo				(const VkFormat				format,
																	 const ImageType			type,
																	 const UVec3&				size,
																	 const VkImageUsageFlags	usageFlags,
																	 const bool					extendedImageCreateFlag);
	VkImageViewUsageCreateInfo	makeImageViewUsageCreateInfo		(VkImageUsageFlags			imageUsageFlags);
	VkDeviceSize					getUncompressedImageData		(const VkFormat				format,
																	 const UVec3&				size,
																	 std::vector<deUint8>&		data);
	virtual void					transcode						(std::vector<deUint8>& srcData, std::vector<deUint8>& dstData, de::MovePtr<Image>& outputImage);
	bool							compareAndLog					(const void* reference, const void* result, size_t size);
};

GraphicsAttachmentsTestInstance::GraphicsAttachmentsTestInstance (Context& context, const TestParameters& parameters)
	: BasicTranscodingTestInstance(context, parameters)
{
}

TestStatus GraphicsAttachmentsTestInstance::iterate (void)
{
	std::vector<deUint8>	srcData;
	std::vector<deUint8>	dstData;
	de::MovePtr<Image>		outputImage;

	transcode(srcData, dstData, outputImage);

	DE_ASSERT(srcData.size() > 0 && srcData.size() == dstData.size());

	if (!compareAndLog(&srcData[0], &dstData[0], srcData.size()))
		return TestStatus::fail("Output differs from input");

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

void GraphicsAttachmentsTestInstance::transcode (std::vector<deUint8>& srcData, std::vector<deUint8>& dstData, de::MovePtr<Image>& outputImage)
{
	const DeviceInterface&					vk						= m_context.getDeviceInterface();
	const VkDevice							device					= m_context.getDevice();
	const deUint32							queueFamilyIndex		= m_context.getUniversalQueueFamilyIndex();
	const VkQueue							queue					= m_context.getUniversalQueue();
	Allocator&								allocator				= m_context.getDefaultAllocator();

	const VkImageSubresourceRange			subresourceRange		= makeImageSubresourceRange(VK_IMAGE_ASPECT_COLOR_BIT, 0u, SINGLE_LEVEL, 0u, SINGLE_LAYER);
	const VkImageViewUsageCreateInfo*		imageViewUsageNull		= (VkImageViewUsageCreateInfo*)DE_NULL;
	const VkImageViewUsageCreateInfo		imageViewUsage			= makeImageViewUsageCreateInfo(m_parameters.testedImageUsage);

	const VkFormat							srcFormat				= (m_parameters.operation == OPERATION_ATTACHMENT_READ)  ? m_parameters.featurelessFormat :
																	  (m_parameters.operation == OPERATION_ATTACHMENT_WRITE) ? m_parameters.featuredFormat :
																	  VK_FORMAT_UNDEFINED;
	const bool								srcExtendedImageCreate	= (m_parameters.operation == OPERATION_ATTACHMENT_READ)  ? true :
																	  (m_parameters.operation == OPERATION_ATTACHMENT_WRITE) ? false :
																	  false;
	const VkImageUsageFlags					srcImageUsageFlags		= (m_parameters.operation == OPERATION_ATTACHMENT_READ)  ? m_parameters.testedImageUsage :
																	  (m_parameters.operation == OPERATION_ATTACHMENT_WRITE) ? m_parameters.pairedImageUsage :
																	  0;
	const VkImageViewUsageCreateInfo*		srcImageViewUsageFlags	= (m_parameters.operation == OPERATION_ATTACHMENT_READ)  ? &imageViewUsage :
																	  (m_parameters.operation == OPERATION_ATTACHMENT_WRITE) ? imageViewUsageNull :
																	  imageViewUsageNull;
	const VkDeviceSize						srcImageSizeInBytes		= getUncompressedImageData(srcFormat, m_parameters.size, srcData);

	const VkFormat							dstFormat				= (m_parameters.operation == OPERATION_ATTACHMENT_READ)  ? m_parameters.featuredFormat :
																	  (m_parameters.operation == OPERATION_ATTACHMENT_WRITE) ? m_parameters.featurelessFormat :
																	  VK_FORMAT_UNDEFINED;
	const bool								dstExtendedImageCreate	= (m_parameters.operation == OPERATION_ATTACHMENT_READ)  ? false :
																	  (m_parameters.operation == OPERATION_ATTACHMENT_WRITE) ? true :
																	  false;
	const VkImageUsageFlags					dstImageUsageFlags		= (m_parameters.operation == OPERATION_ATTACHMENT_READ)  ? m_parameters.pairedImageUsage :
																	  (m_parameters.operation == OPERATION_ATTACHMENT_WRITE) ? m_parameters.testedImageUsage :
																	  0;
	const VkImageViewUsageCreateInfo*		dstImageViewUsageFlags	= (m_parameters.operation == OPERATION_ATTACHMENT_READ)  ? imageViewUsageNull :
																	  (m_parameters.operation == OPERATION_ATTACHMENT_WRITE) ? &imageViewUsage :
																	  imageViewUsageNull;
	const VkDeviceSize						dstImageSizeInBytes		= getUncompressedImageSizeInBytes(dstFormat, m_parameters.size);

	const std::vector<tcu::Vec4>			vertexArray				= createFullscreenQuad();
	const deUint32							vertexCount				= static_cast<deUint32>(vertexArray.size());
	const size_t							vertexBufferSizeInBytes	= vertexCount * sizeof(vertexArray[0]);
	const MovePtr<Buffer>					vertexBuffer			= MovePtr<Buffer>(new Buffer(vk, device, allocator, makeBufferCreateInfo(vertexBufferSizeInBytes, VK_BUFFER_USAGE_VERTEX_BUFFER_BIT), MemoryRequirement::HostVisible));
	const Allocation&						vertexBufferAlloc		= vertexBuffer->getAllocation();
	const VkDeviceSize						vertexBufferOffset[]	= { 0 };

	const VkBufferCreateInfo				srcImageBufferInfo		(makeBufferCreateInfo(srcImageSizeInBytes, VK_BUFFER_USAGE_TRANSFER_SRC_BIT));
	const MovePtr<Buffer>					srcImageBuffer			= MovePtr<Buffer>(new Buffer(vk, device, allocator, srcImageBufferInfo, MemoryRequirement::HostVisible));

	const VkImageCreateInfo					srcImageCreateInfo		= makeCreateImageInfo(srcFormat, m_parameters.imageType, m_parameters.size, srcImageUsageFlags, srcExtendedImageCreate);
	const MovePtr<Image>					srcImage				(new Image(vk, device, allocator, srcImageCreateInfo, MemoryRequirement::Any));
	Move<VkImageView>						srcImageView			(makeImageView(vk, device, srcImage->get(), mapImageViewType(m_parameters.imageType), m_parameters.featuredFormat, subresourceRange, srcImageViewUsageFlags));

	const VkImageCreateInfo					dstImageCreateInfo		= makeCreateImageInfo(dstFormat, m_parameters.imageType, m_parameters.size, dstImageUsageFlags, dstExtendedImageCreate);
	de::MovePtr<Image>						dstImage				(new Image(vk, device, allocator, dstImageCreateInfo, MemoryRequirement::Any));
	Move<VkImageView>						dstImageView			(makeImageView(vk, device, dstImage->get(), mapImageViewType(m_parameters.imageType), m_parameters.featuredFormat, subresourceRange, dstImageViewUsageFlags));

	const VkBufferCreateInfo				dstImageBufferInfo		(makeBufferCreateInfo(dstImageSizeInBytes, VK_BUFFER_USAGE_TRANSFER_DST_BIT));
	MovePtr<Buffer>							dstImageBuffer			= MovePtr<Buffer>(new Buffer(vk, device, allocator, dstImageBufferInfo, MemoryRequirement::HostVisible));

	const Unique<VkShaderModule>			vertShaderModule		(createShaderModule(vk, device, m_context.getBinaryCollection().get("vert"), 0));
	const Unique<VkShaderModule>			fragShaderModule		(createShaderModule(vk, device, m_context.getBinaryCollection().get("frag"), 0));

	const Unique<VkRenderPass>				renderPass				(vkt::image::makeRenderPass(vk, device, m_parameters.featuredFormat, m_parameters.featuredFormat));

	const Move<VkDescriptorSetLayout>		descriptorSetLayout		(DescriptorSetLayoutBuilder()
																		.addSingleBinding(VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT, VK_SHADER_STAGE_FRAGMENT_BIT)
																		.build(vk, device));
	const Move<VkDescriptorPool>			descriptorPool			(DescriptorPoolBuilder()
																		.addType(VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT, SINGLE_LAYER)
																		.build(vk, device, VK_DESCRIPTOR_POOL_CREATE_FREE_DESCRIPTOR_SET_BIT, SINGLE_LAYER));
	const Move<VkDescriptorSet>				descriptorSet			(makeDescriptorSet(vk, device, *descriptorPool, *descriptorSetLayout));
	const VkDescriptorImageInfo				descriptorSrcImageInfo	(makeDescriptorImageInfo(DE_NULL, *srcImageView, VK_IMAGE_LAYOUT_GENERAL));

	const VkExtent2D						renderSize				(makeExtent2D(m_parameters.size[0], m_parameters.size[1]));
	const Unique<VkPipelineLayout>			pipelineLayout			(makePipelineLayout(vk, device, *descriptorSetLayout));
	const Unique<VkPipeline>				pipeline				(makeGraphicsPipeline(vk, device, *pipelineLayout, *renderPass, *vertShaderModule, *fragShaderModule, renderSize, 1u));
	const Unique<VkCommandPool>				cmdPool					(createCommandPool(vk, device, VK_COMMAND_POOL_RESET_RELEASE_RESOURCES_BIT, queueFamilyIndex));
	const Unique<VkCommandBuffer>			cmdBuffer				(allocateCommandBuffer(vk, device, *cmdPool, VK_COMMAND_BUFFER_LEVEL_PRIMARY));

	const VkBufferImageCopy					srcCopyRegion			= makeBufferImageCopy(m_parameters.size[0], m_parameters.size[1]);
	const VkBufferMemoryBarrier				srcCopyBufferBarrierPre	= makeBufferMemoryBarrier(VK_ACCESS_HOST_WRITE_BIT, VK_ACCESS_TRANSFER_READ_BIT, srcImageBuffer->get(), 0ull, srcImageSizeInBytes);
	const VkImageMemoryBarrier				srcCopyImageBarrierPre	= makeImageMemoryBarrier(0u, VK_ACCESS_TRANSFER_WRITE_BIT, VK_IMAGE_LAYOUT_UNDEFINED, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, srcImage->get(), subresourceRange);
	const VkImageMemoryBarrier				srcCopyImageBarrierPost	= makeImageMemoryBarrier(VK_ACCESS_TRANSFER_WRITE_BIT, VK_ACCESS_SHADER_READ_BIT, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, VK_IMAGE_LAYOUT_GENERAL, srcImage->get(), subresourceRange);
	const VkBufferImageCopy					dstCopyRegion			= makeBufferImageCopy(m_parameters.size[0], m_parameters.size[1]);

	const VkImageView						attachmentBindInfos[]	= { *srcImageView, *dstImageView };
	const Move<VkFramebuffer>				framebuffer				(makeFramebuffer(vk, device, *renderPass, DE_LENGTH_OF_ARRAY(attachmentBindInfos), attachmentBindInfos, renderSize.width, renderSize.height, SINGLE_LAYER));

	DE_ASSERT(srcImageSizeInBytes == dstImageSizeInBytes);

	// Upload vertex data
	deMemcpy(vertexBufferAlloc.getHostPtr(), &vertexArray[0], vertexBufferSizeInBytes);
	flushAlloc(vk, device, vertexBufferAlloc);

	// Upload source image data
	const Allocation& alloc = srcImageBuffer->getAllocation();
	deMemcpy(alloc.getHostPtr(), &srcData[0], (size_t)srcImageSizeInBytes);
	flushAlloc(vk, device, alloc);

	beginCommandBuffer(vk, *cmdBuffer);
	vk.cmdBindPipeline(*cmdBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, *pipeline);

	//Copy buffer to image
	vk.cmdPipelineBarrier(*cmdBuffer, VK_PIPELINE_STAGE_HOST_BIT, VK_PIPELINE_STAGE_TRANSFER_BIT, (VkDependencyFlags)0, 0, (const VkMemoryBarrier*)DE_NULL, 1u, &srcCopyBufferBarrierPre, 1u, &srcCopyImageBarrierPre);
	vk.cmdCopyBufferToImage(*cmdBuffer, srcImageBuffer->get(), srcImage->get(), VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, 1u, &srcCopyRegion);
	vk.cmdPipelineBarrier(*cmdBuffer, VK_PIPELINE_STAGE_TRANSFER_BIT, VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT, (VkDependencyFlags)0, 0, (const VkMemoryBarrier*)DE_NULL, 0, (const VkBufferMemoryBarrier*)DE_NULL, 1u, &srcCopyImageBarrierPost);

	beginRenderPass(vk, *cmdBuffer, *renderPass, *framebuffer, renderSize);

	DescriptorSetUpdateBuilder()
		.writeSingle(*descriptorSet, DescriptorSetUpdateBuilder::Location::binding(0u), VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT, &descriptorSrcImageInfo)
		.update(vk, device);

	vk.cmdBindDescriptorSets(*cmdBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, *pipelineLayout, 0u, 1u, &descriptorSet.get(), 0u, DE_NULL);
	vk.cmdBindVertexBuffers(*cmdBuffer, 0, 1, &vertexBuffer->get(), vertexBufferOffset);
	vk.cmdDraw(*cmdBuffer, vertexCount, 1, 0, 0);

	endRenderPass(vk, *cmdBuffer);

	const VkImageMemoryBarrier prepareForTransferBarrier = makeImageMemoryBarrier(
		VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT, VK_ACCESS_TRANSFER_READ_BIT,
		VK_IMAGE_LAYOUT_GENERAL, VK_IMAGE_LAYOUT_GENERAL,
		dstImage->get(), subresourceRange);

	const VkBufferMemoryBarrier copyBarrier = makeBufferMemoryBarrier(
		VK_ACCESS_TRANSFER_WRITE_BIT, VK_ACCESS_HOST_READ_BIT,
		dstImageBuffer->get(), 0ull, dstImageSizeInBytes);

	vk.cmdPipelineBarrier(*cmdBuffer, VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT, VK_PIPELINE_STAGE_TRANSFER_BIT, (VkDependencyFlags)0, 0, (const VkMemoryBarrier*)DE_NULL, 0, (const VkBufferMemoryBarrier*)DE_NULL, 1, &prepareForTransferBarrier);
	vk.cmdCopyImageToBuffer(*cmdBuffer, dstImage->get(), VK_IMAGE_LAYOUT_GENERAL, dstImageBuffer->get(), 1u, &dstCopyRegion);
	vk.cmdPipelineBarrier(*cmdBuffer, VK_PIPELINE_STAGE_TRANSFER_BIT, VK_PIPELINE_STAGE_HOST_BIT, (VkDependencyFlags)0, 0, (const VkMemoryBarrier*)DE_NULL, 1, &copyBarrier, 0, (const VkImageMemoryBarrier*)DE_NULL);

	endCommandBuffer(vk, *cmdBuffer);

	submitCommandsAndWait(vk, device, queue, *cmdBuffer);

	const Allocation& dstImageBufferAlloc = dstImageBuffer->getAllocation();
	invalidateAlloc(vk, device, dstImageBufferAlloc);
	dstData.resize((size_t)dstImageSizeInBytes);
	deMemcpy(&dstData[0], dstImageBufferAlloc.getHostPtr(), (size_t)dstImageSizeInBytes);

	outputImage = dstImage;
}


VkImageCreateInfo GraphicsAttachmentsTestInstance::makeCreateImageInfo (const VkFormat				format,
																		const ImageType				type,
																		const UVec3&				size,
																		const VkImageUsageFlags		usageFlags,
																		const bool					extendedImageCreateFlag)
{
	const VkImageType			imageType				= mapImageType(type);
	const VkImageCreateFlags	imageCreateFlagsBase	= VK_IMAGE_CREATE_MUTABLE_FORMAT_BIT;
	const VkImageCreateFlags	imageCreateFlagsAddOn	= extendedImageCreateFlag ? VK_IMAGE_CREATE_EXTENDED_USAGE_BIT_KHR : 0;
	const VkImageCreateFlags	imageCreateFlags		= imageCreateFlagsBase | imageCreateFlagsAddOn;

	const VkImageCreateInfo createImageInfo =
	{
		VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO,	// VkStructureType			sType;
		DE_NULL,								// const void*				pNext;
		imageCreateFlags,						// VkImageCreateFlags		flags;
		imageType,								// VkImageType				imageType;
		format,									// VkFormat					format;
		makeExtent3D(getLayerSize(type, size)),	// VkExtent3D				extent;
		1u,										// deUint32					mipLevels;
		1u,										// deUint32					arrayLayers;
		VK_SAMPLE_COUNT_1_BIT,					// VkSampleCountFlagBits	samples;
		VK_IMAGE_TILING_OPTIMAL,				// VkImageTiling			tiling;
		usageFlags,								// VkImageUsageFlags		usage;
		VK_SHARING_MODE_EXCLUSIVE,				// VkSharingMode			sharingMode;
		0u,										// deUint32					queueFamilyIndexCount;
		DE_NULL,								// const deUint32*			pQueueFamilyIndices;
		VK_IMAGE_LAYOUT_UNDEFINED,				// VkImageLayout			initialLayout;
	};

	return createImageInfo;
}

VkImageViewUsageCreateInfo GraphicsAttachmentsTestInstance::makeImageViewUsageCreateInfo (VkImageUsageFlags imageUsageFlags)
{
	VkImageViewUsageCreateInfo imageViewUsageCreateInfo =
	{
		VK_STRUCTURE_TYPE_IMAGE_VIEW_USAGE_CREATE_INFO_KHR,	//VkStructureType		sType;
		DE_NULL,											//const void*			pNext;
		imageUsageFlags,									//VkImageUsageFlags		usage;
	};

	return imageViewUsageCreateInfo;
}

VkDeviceSize GraphicsAttachmentsTestInstance::getUncompressedImageData (const VkFormat format, const UVec3& size, std::vector<deUint8>& data)
{
	tcu::IVec3				sizeAsIVec3	= tcu::IVec3(static_cast<int>(size[0]), static_cast<int>(size[1]), static_cast<int>(size[2]));
	VkDeviceSize			sizeBytes	= getImageSizeBytes(sizeAsIVec3, format);

	data.resize((size_t)sizeBytes);
	generateData(&data[0], data.size(), format);

	return sizeBytes;
}

bool GraphicsAttachmentsTestInstance::compareAndLog (const void* reference, const void* result, size_t size)
{
	tcu::TestLog&	log			= m_context.getTestContext().getLog();

	const deUint64*	ref64	= reinterpret_cast<const deUint64*>(reference);
	const deUint64*	res64	= reinterpret_cast<const deUint64*>(result);
	const size_t	sizew	= size / sizeof(deUint64);
	bool			equal	= true;

	DE_ASSERT(size % sizeof(deUint64) == 0);

	for (deUint32 ndx = 0u; ndx < static_cast<deUint32>(sizew); ndx++)
	{
		if (ref64[ndx] != res64[ndx])
		{
			std::stringstream str;

			str	<< "Difference begins near byte " << ndx * sizeof(deUint64) << "."
				<< " reference value: 0x" << std::hex << std::setw(2ull * sizeof(deUint64)) << std::setfill('0') << ref64[ndx]
				<< " result value: 0x" << std::hex << std::setw(2ull * sizeof(deUint64)) << std::setfill('0') << res64[ndx];

			log.writeMessage(str.str().c_str());

			equal = false;

			break;
		}
	}

	return equal;
}


class GraphicsTextureTestInstance : public GraphicsAttachmentsTestInstance
{
public:
						GraphicsTextureTestInstance		(Context& context, const TestParameters& parameters);

protected:
	void				transcode						(std::vector<deUint8>& srcData, std::vector<deUint8>& dstData, de::MovePtr<Image>& outputImage);
};

GraphicsTextureTestInstance::GraphicsTextureTestInstance (Context& context, const TestParameters& parameters)
	: GraphicsAttachmentsTestInstance(context, parameters)
{
}

void GraphicsTextureTestInstance::transcode (std::vector<deUint8>& srcData, std::vector<deUint8>& dstData, de::MovePtr<Image>& outputImage)
{
	const DeviceInterface&					vk						= m_context.getDeviceInterface();
	const VkDevice							device					= m_context.getDevice();
	const deUint32							queueFamilyIndex		= m_context.getUniversalQueueFamilyIndex();
	const VkQueue							queue					= m_context.getUniversalQueue();
	Allocator&								allocator				= m_context.getDefaultAllocator();

	const VkImageSubresourceRange			subresourceRange		= makeImageSubresourceRange(VK_IMAGE_ASPECT_COLOR_BIT, 0u, SINGLE_LEVEL, 0u, SINGLE_LAYER);
	const VkImageViewUsageCreateInfo*		imageViewUsageNull		= (VkImageViewUsageCreateInfo*)DE_NULL;
	const VkImageViewUsageCreateInfo		imageViewUsage			= makeImageViewUsageCreateInfo(m_parameters.testedImageUsage);

	const VkFormat							srcFormat				= (m_parameters.operation == OPERATION_TEXTURE_READ)  ? m_parameters.featurelessFormat :
																	  (m_parameters.operation == OPERATION_TEXTURE_WRITE) ? m_parameters.featuredFormat :
																	  VK_FORMAT_UNDEFINED;
	const bool								srcExtendedImageCreate	= (m_parameters.operation == OPERATION_TEXTURE_READ)  ? true :
																	  (m_parameters.operation == OPERATION_TEXTURE_WRITE) ? false :
																	  false;
	const VkImageUsageFlags					srcImageUsageFlags		= (m_parameters.operation == OPERATION_TEXTURE_READ)  ? m_parameters.testedImageUsage :
																	  (m_parameters.operation == OPERATION_TEXTURE_WRITE) ? m_parameters.pairedImageUsage :
																	  0;
	const VkImageViewUsageCreateInfo*		srcImageViewUsage		= (m_parameters.operation == OPERATION_TEXTURE_READ)  ? &imageViewUsage :
																	  (m_parameters.operation == OPERATION_TEXTURE_WRITE) ? imageViewUsageNull :
																	  imageViewUsageNull;
	const VkDeviceSize						srcImageSizeInBytes		= getUncompressedImageData(srcFormat, m_parameters.size, srcData);

	const VkFormat							dstFormat				= (m_parameters.operation == OPERATION_TEXTURE_READ)  ? m_parameters.featuredFormat :
																	  (m_parameters.operation == OPERATION_TEXTURE_WRITE) ? m_parameters.featurelessFormat :
																	  VK_FORMAT_UNDEFINED;
	const bool								dstExtendedImageCreate	= (m_parameters.operation == OPERATION_TEXTURE_READ)  ? false :
																	  (m_parameters.operation == OPERATION_TEXTURE_WRITE) ? true :
																	  false;
	const VkImageUsageFlags					dstImageUsageFlags		= (m_parameters.operation == OPERATION_TEXTURE_READ)  ? m_parameters.pairedImageUsage :
																	  (m_parameters.operation == OPERATION_TEXTURE_WRITE) ? m_parameters.testedImageUsage :
																	  0;
	const VkImageViewUsageCreateInfo*		dstImageViewUsage		= (m_parameters.operation == OPERATION_TEXTURE_READ)  ? imageViewUsageNull :
																	  (m_parameters.operation == OPERATION_TEXTURE_WRITE) ? &imageViewUsage :
																	  imageViewUsageNull;
	const VkDeviceSize						dstImageSizeInBytes		= getUncompressedImageSizeInBytes(dstFormat, m_parameters.size);

	const std::vector<tcu::Vec4>			vertexArray				= createFullscreenQuad();
	const deUint32							vertexCount				= static_cast<deUint32>(vertexArray.size());
	const size_t							vertexBufferSizeInBytes	= vertexCount * sizeof(vertexArray[0]);
	const MovePtr<Buffer>					vertexBuffer			= MovePtr<Buffer>(new Buffer(vk, device, allocator, makeBufferCreateInfo(vertexBufferSizeInBytes, VK_BUFFER_USAGE_VERTEX_BUFFER_BIT), MemoryRequirement::HostVisible));
	const Allocation&						vertexBufferAlloc		= vertexBuffer->getAllocation();
	const VkDeviceSize						vertexBufferOffset[]	= { 0 };

	const VkBufferCreateInfo				srcImageBufferInfo		(makeBufferCreateInfo(srcImageSizeInBytes, VK_BUFFER_USAGE_TRANSFER_SRC_BIT));
	const MovePtr<Buffer>					srcImageBuffer			= MovePtr<Buffer>(new Buffer(vk, device, allocator, srcImageBufferInfo, MemoryRequirement::HostVisible));

	const VkImageCreateInfo					srcImageCreateInfo		= makeCreateImageInfo(srcFormat, m_parameters.imageType, m_parameters.size, srcImageUsageFlags, srcExtendedImageCreate);
	const MovePtr<Image>					srcImage				(new Image(vk, device, allocator, srcImageCreateInfo, MemoryRequirement::Any));
	Move<VkImageView>						srcImageView			(makeImageView(vk, device, srcImage->get(), mapImageViewType(m_parameters.imageType), m_parameters.featuredFormat, subresourceRange, srcImageViewUsage));

	const VkImageCreateInfo					dstImageCreateInfo		= makeCreateImageInfo(dstFormat, m_parameters.imageType, m_parameters.size, dstImageUsageFlags, dstExtendedImageCreate);
	de::MovePtr<Image>						dstImage				(new Image(vk, device, allocator, dstImageCreateInfo, MemoryRequirement::Any));
	Move<VkImageView>						dstImageView			(makeImageView(vk, device, dstImage->get(), mapImageViewType(m_parameters.imageType), m_parameters.featuredFormat, subresourceRange, dstImageViewUsage));
	const VkImageMemoryBarrier				dstCopyImageBarrier		= makeImageMemoryBarrier(0u, VK_ACCESS_SHADER_READ_BIT, VK_IMAGE_LAYOUT_UNDEFINED, VK_IMAGE_LAYOUT_GENERAL, dstImage->get(), subresourceRange);

	const VkBufferCreateInfo				dstImageBufferInfo		(makeBufferCreateInfo(dstImageSizeInBytes, VK_BUFFER_USAGE_TRANSFER_DST_BIT));
	MovePtr<Buffer>							dstImageBuffer			= MovePtr<Buffer>(new Buffer(vk, device, allocator, dstImageBufferInfo, MemoryRequirement::HostVisible));

	const Unique<VkShaderModule>			vertShaderModule		(createShaderModule(vk, device, m_context.getBinaryCollection().get("vert"), 0));
	const Unique<VkShaderModule>			fragShaderModule		(createShaderModule(vk, device, m_context.getBinaryCollection().get("frag"), 0));

	const Unique<VkRenderPass>				renderPass				(makeRenderPass(vk, device));

	const Move<VkDescriptorSetLayout>		descriptorSetLayout		(DescriptorSetLayoutBuilder()
																		.addSingleBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT)
																		.addSingleBinding(VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, VK_SHADER_STAGE_FRAGMENT_BIT)
																		.build(vk, device));
	const Move<VkDescriptorPool>			descriptorPool			(DescriptorPoolBuilder()
																		.addType(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER)
																		.addType(VK_DESCRIPTOR_TYPE_STORAGE_IMAGE)
																		.build(vk, device, VK_DESCRIPTOR_POOL_CREATE_FREE_DESCRIPTOR_SET_BIT, 1u));
	const Move<VkDescriptorSet>				descriptorSet			(makeDescriptorSet(vk, device, *descriptorPool, *descriptorSetLayout));
	const VkSamplerCreateInfo				srcSamplerInfo			(makeSamplerCreateInfo());
	const Move<VkSampler>					srcSampler				= vk::createSampler(vk, device, &srcSamplerInfo);
	const VkDescriptorImageInfo				descriptorSrcImage		(makeDescriptorImageInfo(*srcSampler, *srcImageView, VK_IMAGE_LAYOUT_GENERAL));
	const VkDescriptorImageInfo				descriptorDstImage		(makeDescriptorImageInfo(DE_NULL, *dstImageView, VK_IMAGE_LAYOUT_GENERAL));

	const VkExtent2D						renderSize				(makeExtent2D(m_parameters.size[0], m_parameters.size[1]));
	const Unique<VkPipelineLayout>			pipelineLayout			(makePipelineLayout(vk, device, *descriptorSetLayout));
	const Unique<VkPipeline>				pipeline				(makeGraphicsPipeline(vk, device, *pipelineLayout, *renderPass, *vertShaderModule, *fragShaderModule, renderSize, 0u));
	const Unique<VkCommandPool>				cmdPool					(createCommandPool(vk, device, VK_COMMAND_POOL_RESET_RELEASE_RESOURCES_BIT, queueFamilyIndex));
	const Unique<VkCommandBuffer>			cmdBuffer				(allocateCommandBuffer(vk, device, *cmdPool, VK_COMMAND_BUFFER_LEVEL_PRIMARY));

	const VkBufferImageCopy					srcCopyRegion			= makeBufferImageCopy(m_parameters.size[0], m_parameters.size[1]);
	const VkBufferMemoryBarrier				srcCopyBufferBarrier	= makeBufferMemoryBarrier(VK_ACCESS_HOST_WRITE_BIT, VK_ACCESS_TRANSFER_READ_BIT, srcImageBuffer->get(), 0ull, srcImageSizeInBytes);
	const VkImageMemoryBarrier				srcCopyImageBarrier		= makeImageMemoryBarrier(0u, VK_ACCESS_TRANSFER_WRITE_BIT, VK_IMAGE_LAYOUT_UNDEFINED, VK_IMAGE_LAYOUT_GENERAL, srcImage->get(), subresourceRange);
	const VkImageMemoryBarrier				srcCopyImageBarrierPost	= makeImageMemoryBarrier(VK_ACCESS_TRANSFER_WRITE_BIT, VK_ACCESS_SHADER_READ_BIT, VK_IMAGE_LAYOUT_GENERAL, VK_IMAGE_LAYOUT_GENERAL, srcImage->get(), subresourceRange);

	const VkBufferImageCopy					dstCopyRegion			= makeBufferImageCopy(m_parameters.size[0], m_parameters.size[1]);

	const VkExtent2D						framebufferSize			(makeExtent2D(m_parameters.size[0], m_parameters.size[1]));
	const Move<VkFramebuffer>				framebuffer				(makeFramebuffer(vk, device, *renderPass, 0, DE_NULL, framebufferSize.width, framebufferSize.height, SINGLE_LAYER));

	DE_ASSERT(srcImageSizeInBytes == dstImageSizeInBytes);

	// Upload vertex data
	deMemcpy(vertexBufferAlloc.getHostPtr(), &vertexArray[0], vertexBufferSizeInBytes);
	flushAlloc(vk, device, vertexBufferAlloc);

	// Upload source image data
	const Allocation& alloc = srcImageBuffer->getAllocation();
	deMemcpy(alloc.getHostPtr(), &srcData[0], (size_t)srcImageSizeInBytes);
	flushAlloc(vk, device, alloc);

	beginCommandBuffer(vk, *cmdBuffer);
	vk.cmdBindPipeline(*cmdBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, *pipeline);

	//Copy buffer to image
	vk.cmdPipelineBarrier(*cmdBuffer, VK_PIPELINE_STAGE_HOST_BIT, VK_PIPELINE_STAGE_TRANSFER_BIT, (VkDependencyFlags)0, 0, (const VkMemoryBarrier*)DE_NULL, 1u, &srcCopyBufferBarrier, 1u, &srcCopyImageBarrier);
	vk.cmdCopyBufferToImage(*cmdBuffer, srcImageBuffer->get(), srcImage->get(), VK_IMAGE_LAYOUT_GENERAL, 1u, &srcCopyRegion);
	vk.cmdPipelineBarrier(*cmdBuffer, VK_PIPELINE_STAGE_TRANSFER_BIT, VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT, (VkDependencyFlags)0, 0, (const VkMemoryBarrier*)DE_NULL, 0, (const VkBufferMemoryBarrier*)DE_NULL, 1u, &srcCopyImageBarrierPost);

	// Make source image readable
	vk.cmdPipelineBarrier(*cmdBuffer, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT, VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT, (VkDependencyFlags)0, 0, (const VkMemoryBarrier*)DE_NULL, 0u, DE_NULL, 1u, &dstCopyImageBarrier);

	beginRenderPass(vk, *cmdBuffer, *renderPass, *framebuffer, renderSize);
	{
		DescriptorSetUpdateBuilder()
			.writeSingle(*descriptorSet, DescriptorSetUpdateBuilder::Location::binding(0u), VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, &descriptorSrcImage)
			.writeSingle(*descriptorSet, DescriptorSetUpdateBuilder::Location::binding(1u), VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, &descriptorDstImage)
			.update(vk, device);

		vk.cmdBindDescriptorSets(*cmdBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, *pipelineLayout, 0u, 1u, &descriptorSet.get(), 0u, DE_NULL);
		vk.cmdBindVertexBuffers(*cmdBuffer, 0, 1, &vertexBuffer->get(), vertexBufferOffset);
		vk.cmdDraw(*cmdBuffer, vertexCount, 1, 0, 0);
	}
	endRenderPass(vk, *cmdBuffer);

	const VkImageMemoryBarrier prepareForTransferBarrier = makeImageMemoryBarrier(
		VK_ACCESS_SHADER_WRITE_BIT, VK_ACCESS_TRANSFER_READ_BIT,
		VK_IMAGE_LAYOUT_GENERAL, VK_IMAGE_LAYOUT_GENERAL,
		dstImage->get(), subresourceRange);

	const VkBufferMemoryBarrier copyBarrier = makeBufferMemoryBarrier(
		VK_ACCESS_TRANSFER_WRITE_BIT, VK_ACCESS_HOST_READ_BIT,
		dstImageBuffer->get(), 0ull, dstImageSizeInBytes);

	vk.cmdPipelineBarrier(*cmdBuffer, VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT, VK_PIPELINE_STAGE_TRANSFER_BIT, (VkDependencyFlags)0, 0, (const VkMemoryBarrier*)DE_NULL, 0, (const VkBufferMemoryBarrier*)DE_NULL, 1, &prepareForTransferBarrier);
	vk.cmdCopyImageToBuffer(*cmdBuffer, dstImage->get(), VK_IMAGE_LAYOUT_GENERAL, dstImageBuffer->get(), 1u, &dstCopyRegion);
	vk.cmdPipelineBarrier(*cmdBuffer, VK_PIPELINE_STAGE_TRANSFER_BIT, VK_PIPELINE_STAGE_HOST_BIT, (VkDependencyFlags)0, 0, (const VkMemoryBarrier*)DE_NULL, 1, &copyBarrier, 0, (const VkImageMemoryBarrier*)DE_NULL);

	endCommandBuffer(vk, *cmdBuffer);

	submitCommandsAndWait(vk, device, queue, *cmdBuffer);

	const Allocation& dstImageBufferAlloc = dstImageBuffer->getAllocation();
	invalidateAlloc(vk, device, dstImageBufferAlloc);
	dstData.resize((size_t)dstImageSizeInBytes);
	deMemcpy(&dstData[0], dstImageBufferAlloc.getHostPtr(), (size_t)dstImageSizeInBytes);

	outputImage = dstImage;
}

class ImageTranscodingCase : public TestCase
{
public:
							ImageTranscodingCase		(TestContext&				testCtx,
														 const std::string&			name,
														 const std::string&			desc,
														 const TestParameters&		parameters);
	void					initPrograms				(SourceCollections&			programCollection) const;
	TestInstance*			createInstance				(Context&					context) const;
	virtual void			checkSupport				(Context&					context) const;
	bool					isFormatUsageFlagSupported	(Context&					context,
														 const VkFormat				format,
														 VkImageUsageFlags			formatUsageFlags) const;

protected:
	const TestParameters	m_parameters;
};

ImageTranscodingCase::ImageTranscodingCase (TestContext& testCtx, const std::string& name, const std::string& desc, const TestParameters& parameters)
	: TestCase				(testCtx, name, desc)
	, m_parameters			(parameters)
{
}

void ImageTranscodingCase::initPrograms (vk::SourceCollections&	programCollection) const
{
	DE_ASSERT(m_parameters.size.x() > 0);
	DE_ASSERT(m_parameters.size.y() > 0);

	ImageType	imageTypeForFS = (m_parameters.imageType == IMAGE_TYPE_2D_ARRAY) ? IMAGE_TYPE_2D : m_parameters.imageType;

	// Vertex shader
	{
		std::ostringstream src;
		src << glu::getGLSLVersionDeclaration(glu::GLSL_VERSION_450) << "\n\n"
			<< "layout(location = 0) in vec4 v_in_position;\n"
			<< "\n"
			<< "void main (void)\n"
			<< "{\n"
			<< "    gl_Position = v_in_position;\n"
			<< "}\n";

		programCollection.glslSources.add("vert") << glu::VertexSource(src.str());
	}

	// Fragment shader
	{
		switch(m_parameters.operation)
		{
			case OPERATION_ATTACHMENT_READ:
			case OPERATION_ATTACHMENT_WRITE:
			{
				std::ostringstream	src;

				const std::string	dstTypeStr	= getGlslAttachmentType(m_parameters.featuredFormat);
				const std::string	srcTypeStr	= getGlslInputAttachmentType(m_parameters.featuredFormat);

				src << glu::getGLSLVersionDeclaration(glu::GLSL_VERSION_450) << "\n\n"
					<< "precision highp int;\n"
					<< "precision highp float;\n"
					<< "\n"
					<< "layout (location = 0) out highp " << dstTypeStr << " o_color;\n"
					<< "layout (input_attachment_index = 0, set = 0, binding = 0) uniform highp " << srcTypeStr << " inputImage1;\n"
					<< "\n"
					<< "void main (void)\n"
					<< "{\n"
					<< "    o_color = " << dstTypeStr << "(subpassLoad(inputImage1));\n"
					<< "}\n";

				programCollection.glslSources.add("frag") << glu::FragmentSource(src.str());

				break;
			}

			case OPERATION_TEXTURE_READ:
			case OPERATION_TEXTURE_WRITE:
			{
				std::ostringstream	src;

				const std::string	srcSamplerTypeStr		= getGlslSamplerType(mapVkFormat(m_parameters.featuredFormat), mapImageViewType(imageTypeForFS));
				const std::string	dstImageTypeStr			= getShaderImageType(mapVkFormat(m_parameters.featuredFormat), imageTypeForFS);
				const std::string	dstFormatQualifierStr	= getShaderImageFormatQualifier(mapVkFormat(m_parameters.featuredFormat));

				src << glu::getGLSLVersionDeclaration(glu::GLSL_VERSION_450) << "\n\n"
					<< "layout (binding = 0) uniform " << srcSamplerTypeStr << " u_imageIn;\n"
					<< "layout (binding = 1, " << dstFormatQualifierStr << ") writeonly uniform " << dstImageTypeStr << " u_imageOut;\n"
					<< "\n"
					<< "void main (void)\n"
					<< "{\n"
					<< "    const ivec2 out_pos = ivec2(gl_FragCoord.xy);\n"
					<< "    const vec2 pixels_resolution = vec2(textureSize(u_imageIn, 0));\n"
					<< "    const vec2 in_pos = vec2(gl_FragCoord.xy) / vec2(pixels_resolution);\n"
					<< "    imageStore(u_imageOut, out_pos, texture(u_imageIn, in_pos));\n"
					<< "}\n";

				programCollection.glslSources.add("frag") << glu::FragmentSource(src.str());

				break;
			}

			default:
				DE_ASSERT(false);
		}
	}
}

bool ImageTranscodingCase::isFormatUsageFlagSupported (Context& context, const VkFormat format, VkImageUsageFlags formatUsageFlags) const
{
	const VkPhysicalDevice		physicalDevice			= context.getPhysicalDevice();
	const InstanceInterface&	vk						= context.getInstanceInterface();
	VkImageFormatProperties		imageFormatProperties;
	const VkResult				queryResult				= vk.getPhysicalDeviceImageFormatProperties(
															physicalDevice,
															format,
															mapImageType(m_parameters.imageType),
															VK_IMAGE_TILING_OPTIMAL,
															formatUsageFlags,
															VK_IMAGE_CREATE_EXTENDED_USAGE_BIT_KHR,
															&imageFormatProperties);

	return (queryResult == VK_SUCCESS);
}

void ImageTranscodingCase::checkSupport (Context& context) const
{
	context.requireDeviceFunctionality("VK_KHR_maintenance2");

	if (!isFormatUsageFlagSupported(context, m_parameters.featuredFormat, m_parameters.testedImageUsageFeature))
		TCU_THROW(NotSupportedError, "Test skipped due to feature is not supported by the format");

	if (!isFormatUsageFlagSupported(context, m_parameters.featuredFormat, m_parameters.testedImageUsage | m_parameters.pairedImageUsage))
		TCU_THROW(NotSupportedError, "Required image usage flags are not supported by the format");
}

TestInstance* ImageTranscodingCase::createInstance (Context& context) const
{
	VkFormat					featurelessFormat	= VK_FORMAT_UNDEFINED;
	bool						differenceFound		= false;

	DE_ASSERT(m_parameters.testedImageUsageFeature != 0);

	for (deUint32 i = 0; m_parameters.compatibleFormats[i] != VK_FORMAT_UNDEFINED; i++)
	{
		featurelessFormat = m_parameters.compatibleFormats[i];

		if (isSupportedByFramework(featurelessFormat)
			&& !isFormatUsageFlagSupported(context, featurelessFormat, m_parameters.testedImageUsageFeature)
			&& isFormatUsageFlagSupported(context, featurelessFormat, m_parameters.testedImageUsage & (~m_parameters.testedImageUsageFeature))
			)
		{
			differenceFound = true;

			break;
		}
	}

	if (differenceFound)
	{
		if ((context.isDeviceFunctionalitySupported("VK_KHR_portability_subset") &&
			!context.getPortabilitySubsetFeatures().imageViewFormatReinterpretation))
		{
			tcu::TextureFormat	textureImageFormat	= vk::mapVkFormat(m_parameters.featuredFormat);
			tcu::TextureFormat	textureViewFormat	= vk::mapVkFormat(featurelessFormat);

			if (tcu::getTextureFormatBitDepth(textureImageFormat) != tcu::getTextureFormatBitDepth(textureViewFormat))
				TCU_THROW(NotSupportedError, "VK_KHR_portability_subset: Format must not contain a different number of bits in each component, than the format of the VkImage");
		}

		TestParameters	calculatedParameters	=
		{
			m_parameters.operation,					// Operation				operation
			m_parameters.size,						// UVec3					size
			m_parameters.imageType,					// ImageType				imageType
			m_parameters.testedImageUsageFeature,	// VkImageUsageFlagBits		testedImageUsageFeature
			m_parameters.featuredFormat,			// VkFormat					featuredFormat
			featurelessFormat,						// VkFormat					featurelessFormat
			m_parameters.testedImageUsage,			// VkImageUsageFlags		testedImageUsage
			m_parameters.pairedImageUsage,			// VkImageUsageFlags		pairedImageUsage
			DE_NULL,								// const VkFormat*			compatibleFormats
		};

		switch (m_parameters.operation)
		{
			case OPERATION_ATTACHMENT_READ:
			case OPERATION_ATTACHMENT_WRITE:
				return new GraphicsAttachmentsTestInstance(context, calculatedParameters);

			case OPERATION_TEXTURE_READ:
			case OPERATION_TEXTURE_WRITE:
				return new GraphicsTextureTestInstance(context, calculatedParameters);

			default:
				TCU_THROW(InternalError, "Impossible");
		}
	}
	else
		TCU_THROW(NotSupportedError, "All formats in group contain tested feature. Test is impossible.");
}

} // anonymous ns

static const VkFormat	compatibleFormatList8Bit[]		=
{
	VK_FORMAT_R4G4_UNORM_PACK8,
	VK_FORMAT_R8_UNORM,
	VK_FORMAT_R8_SNORM,
	VK_FORMAT_R8_USCALED,
	VK_FORMAT_R8_SSCALED,
	VK_FORMAT_R8_UINT,
	VK_FORMAT_R8_SINT,
	VK_FORMAT_R8_SRGB,

	VK_FORMAT_UNDEFINED
};

static const VkFormat	compatibleFormatList16Bit[]		=
{
	VK_FORMAT_R4G4B4A4_UNORM_PACK16,
	VK_FORMAT_B4G4R4A4_UNORM_PACK16,
	VK_FORMAT_R5G6B5_UNORM_PACK16,
	VK_FORMAT_B5G6R5_UNORM_PACK16,
	VK_FORMAT_R5G5B5A1_UNORM_PACK16,
	VK_FORMAT_B5G5R5A1_UNORM_PACK16,
	VK_FORMAT_A1R5G5B5_UNORM_PACK16,
	VK_FORMAT_R8G8_UNORM,
	VK_FORMAT_R8G8_SNORM,
	VK_FORMAT_R8G8_USCALED,
	VK_FORMAT_R8G8_SSCALED,
	VK_FORMAT_R8G8_UINT,
	VK_FORMAT_R8G8_SINT,
	VK_FORMAT_R8G8_SRGB,
	VK_FORMAT_R16_UNORM,
	VK_FORMAT_R16_SNORM,
	VK_FORMAT_R16_USCALED,
	VK_FORMAT_R16_SSCALED,
	VK_FORMAT_R16_UINT,
	VK_FORMAT_R16_SINT,
	VK_FORMAT_R16_SFLOAT,
	VK_FORMAT_A4R4G4B4_UNORM_PACK16_EXT,
	VK_FORMAT_A4B4G4R4_UNORM_PACK16_EXT,

	VK_FORMAT_UNDEFINED
};

static const VkFormat	compatibleFormatList24Bit[]		=
{
	VK_FORMAT_R8G8B8_UNORM,
	VK_FORMAT_R8G8B8_SNORM,
	VK_FORMAT_R8G8B8_USCALED,
	VK_FORMAT_R8G8B8_SSCALED,
	VK_FORMAT_R8G8B8_UINT,
	VK_FORMAT_R8G8B8_SINT,
	VK_FORMAT_R8G8B8_SRGB,
	VK_FORMAT_B8G8R8_UNORM,
	VK_FORMAT_B8G8R8_SNORM,
	VK_FORMAT_B8G8R8_USCALED,
	VK_FORMAT_B8G8R8_SSCALED,
	VK_FORMAT_B8G8R8_UINT,
	VK_FORMAT_B8G8R8_SINT,
	VK_FORMAT_B8G8R8_SRGB,

	VK_FORMAT_UNDEFINED
};

static const VkFormat	compatibleFormatList32Bit[]		=
{
	VK_FORMAT_R8G8B8A8_UNORM,
	VK_FORMAT_R8G8B8A8_SNORM,
	VK_FORMAT_R8G8B8A8_USCALED,
	VK_FORMAT_R8G8B8A8_SSCALED,
	VK_FORMAT_R8G8B8A8_UINT,
	VK_FORMAT_R8G8B8A8_SINT,
	VK_FORMAT_R8G8B8A8_SRGB,
	VK_FORMAT_B8G8R8A8_UNORM,
	VK_FORMAT_B8G8R8A8_SNORM,
	VK_FORMAT_B8G8R8A8_USCALED,
	VK_FORMAT_B8G8R8A8_SSCALED,
	VK_FORMAT_B8G8R8A8_UINT,
	VK_FORMAT_B8G8R8A8_SINT,
	VK_FORMAT_B8G8R8A8_SRGB,
	VK_FORMAT_A8B8G8R8_UNORM_PACK32,
	VK_FORMAT_A8B8G8R8_SNORM_PACK32,
	VK_FORMAT_A8B8G8R8_USCALED_PACK32,
	VK_FORMAT_A8B8G8R8_SSCALED_PACK32,
	VK_FORMAT_A8B8G8R8_UINT_PACK32,
	VK_FORMAT_A8B8G8R8_SINT_PACK32,
	VK_FORMAT_A8B8G8R8_SRGB_PACK32,
	VK_FORMAT_A2R10G10B10_UNORM_PACK32,
	VK_FORMAT_A2R10G10B10_SNORM_PACK32,
	VK_FORMAT_A2R10G10B10_USCALED_PACK32,
	VK_FORMAT_A2R10G10B10_SSCALED_PACK32,
	VK_FORMAT_A2R10G10B10_UINT_PACK32,
	VK_FORMAT_A2R10G10B10_SINT_PACK32,
	VK_FORMAT_A2B10G10R10_UNORM_PACK32,
	VK_FORMAT_A2B10G10R10_SNORM_PACK32,
	VK_FORMAT_A2B10G10R10_USCALED_PACK32,
	VK_FORMAT_A2B10G10R10_SSCALED_PACK32,
	VK_FORMAT_A2B10G10R10_UINT_PACK32,
	VK_FORMAT_A2B10G10R10_SINT_PACK32,
	VK_FORMAT_R16G16_UNORM,
	VK_FORMAT_R16G16_SNORM,
	VK_FORMAT_R16G16_USCALED,
	VK_FORMAT_R16G16_SSCALED,
	VK_FORMAT_R16G16_UINT,
	VK_FORMAT_R16G16_SINT,
	VK_FORMAT_R16G16_SFLOAT,
	VK_FORMAT_R32_UINT,
	VK_FORMAT_R32_SINT,
	VK_FORMAT_R32_SFLOAT,

	VK_FORMAT_UNDEFINED
};

static const VkFormat	compatibleFormatList48Bit[]		=
{
	VK_FORMAT_R16G16B16_UNORM,
	VK_FORMAT_R16G16B16_SNORM,
	VK_FORMAT_R16G16B16_USCALED,
	VK_FORMAT_R16G16B16_SSCALED,
	VK_FORMAT_R16G16B16_UINT,
	VK_FORMAT_R16G16B16_SINT,
	VK_FORMAT_R16G16B16_SFLOAT,

	VK_FORMAT_UNDEFINED
};

static const VkFormat	compatibleFormatList64Bit[]		=
{
	VK_FORMAT_R16G16B16A16_UNORM,
	VK_FORMAT_R16G16B16A16_SNORM,
	VK_FORMAT_R16G16B16A16_USCALED,
	VK_FORMAT_R16G16B16A16_SSCALED,
	VK_FORMAT_R16G16B16A16_UINT,
	VK_FORMAT_R16G16B16A16_SINT,
	VK_FORMAT_R16G16B16A16_SFLOAT,
	VK_FORMAT_R32G32_UINT,
	VK_FORMAT_R32G32_SINT,
	VK_FORMAT_R32G32_SFLOAT,
	VK_FORMAT_R64_UINT,
	VK_FORMAT_R64_SINT,
	VK_FORMAT_R64_SFLOAT,

	VK_FORMAT_UNDEFINED
};

static const VkFormat	compatibleFormatList96Bit[]		=
{
	VK_FORMAT_R32G32B32_UINT,
	VK_FORMAT_R32G32B32_SINT,
	VK_FORMAT_R32G32B32_SFLOAT,

	VK_FORMAT_UNDEFINED
};

static const VkFormat	compatibleFormatList128Bit[]	=
{
	VK_FORMAT_R32G32B32A32_UINT,
	VK_FORMAT_R32G32B32A32_SINT,
	VK_FORMAT_R32G32B32A32_SFLOAT,
	VK_FORMAT_R64G64_UINT,
	VK_FORMAT_R64G64_SINT,
	VK_FORMAT_R64G64_SFLOAT,

	VK_FORMAT_UNDEFINED
};

const VkFormat	compatibleFormatList192Bit[]	=
{
	VK_FORMAT_R64G64B64_UINT,
	VK_FORMAT_R64G64B64_SINT,
	VK_FORMAT_R64G64B64_SFLOAT,

	VK_FORMAT_UNDEFINED
};

static const VkFormat	compatibleFormatList256Bit[]	=
{
	VK_FORMAT_R64G64B64A64_UINT,
	VK_FORMAT_R64G64B64A64_SINT,
	VK_FORMAT_R64G64B64A64_SFLOAT,

	VK_FORMAT_UNDEFINED
};

static const VkFormat*	compatibleFormatsList[]	=
{
	compatibleFormatList8Bit,
	compatibleFormatList16Bit,
	compatibleFormatList24Bit,
	compatibleFormatList32Bit,
	compatibleFormatList48Bit,
	compatibleFormatList64Bit,
	compatibleFormatList96Bit,
	compatibleFormatList128Bit,
	compatibleFormatList192Bit,
	compatibleFormatList256Bit,
};

tcu::TestCaseGroup* createImageTranscodingSupportTests (tcu::TestContext& testCtx)
{
	const std::string			operationName[OPERATION_LAST]			=
	{
		"attachment_read",
		"attachment_write",
		"texture_read",
		"texture_write",
	};
	const VkImageUsageFlagBits	testedImageUsageFlags[OPERATION_LAST]	=
	{
		VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT,
		VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT,
		VK_IMAGE_USAGE_SAMPLED_BIT,
		VK_IMAGE_USAGE_STORAGE_BIT,
	};
	const VkImageUsageFlagBits	pairedImageUsageFlags[OPERATION_LAST]	=
	{
		VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT,
		VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT,
		VK_IMAGE_USAGE_STORAGE_BIT,
		VK_IMAGE_USAGE_SAMPLED_BIT,
	};
	VkImageUsageFlags			baseFlagsAddOn							= VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT;

	MovePtr<tcu::TestCaseGroup>	imageTranscodingTests	(new tcu::TestCaseGroup(testCtx, "extended_usage_bit", "Extended usage bit test cases"));

	for (int operationNdx = OPERATION_ATTACHMENT_READ; operationNdx < OPERATION_LAST; ++operationNdx)
	{
		MovePtr<tcu::TestCaseGroup>	imageOperationGroup	(new tcu::TestCaseGroup(testCtx, operationName[operationNdx].c_str(), ""));

		for (deUint32 groupNdx = 0; groupNdx < DE_LENGTH_OF_ARRAY(compatibleFormatsList); groupNdx++)
		{
			for (deUint32 featuredFormatNdx = 0; compatibleFormatsList[groupNdx][featuredFormatNdx] != VK_FORMAT_UNDEFINED; featuredFormatNdx++)
			{
				const VkFormat	featuredFormat		= compatibleFormatsList[groupNdx][featuredFormatNdx];
				const VkFormat	featurelessFormat	= VK_FORMAT_UNDEFINED;									// Lookup process is in createInstance()

				if (!isSupportedByFramework(featuredFormat))
					continue;

				// Cannot handle SRGB in shader layout classifier
				if (isSrgbFormat(featuredFormat))
					continue;

				// Cannot handle packed in shader layout classifier
				if (isPackedType(featuredFormat))
					continue;

				// Cannot handle swizzled component format (i.e. bgr) in shader layout classifier
				if (isComponentSwizzled(featuredFormat))
					continue;

				// Cannot handle three-component images in shader layout classifier
				if (getNumUsedChannels(featuredFormat) == 3)
					continue;

				const std::string		testName	= getFormatShortString(featuredFormat);
				const TestParameters	parameters	=
				{
					static_cast<Operation>(operationNdx),					// Operation				operation
					UVec3(16u, 16u, 1u),									// UVec3					size
					IMAGE_TYPE_2D,											// ImageType				imageType
					testedImageUsageFlags[operationNdx],					// VkImageUsageFlagBits		testedImageUsageFeature
					featuredFormat,											// VkFormat					featuredFormat
					featurelessFormat,										// VkFormat					featurelessFormat
					baseFlagsAddOn | testedImageUsageFlags[operationNdx],	// VkImageUsageFlags		testedImageUsage
					baseFlagsAddOn | pairedImageUsageFlags[operationNdx],	// VkImageUsageFlags		pairedImageUsage
					compatibleFormatsList[groupNdx]							// const VkFormat*			compatibleFormats
				};

				imageOperationGroup->addChild(new ImageTranscodingCase(testCtx, testName, "", parameters));
			}
		}

		imageTranscodingTests->addChild(imageOperationGroup.release());
	}

	return imageTranscodingTests.release();
}

} // image
} // vkt