/*------------------------------------------------------------------------
 * Vulkan Conformance Tests
 * ------------------------
 *
 * Copyright (c) 2015 The Khronos Group Inc.
 * Copyright (c) 2015 Imagination Technologies Ltd.
 *
 * 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 Sampler Tests
 *//*--------------------------------------------------------------------*/

#include "vktPipelineSamplerTests.hpp"
#include "vktPipelineImageSamplingInstance.hpp"
#include "vktPipelineImageUtil.hpp"
#include "vktPipelineVertexUtil.hpp"
#include "vktTestCase.hpp"
#include "vkImageUtil.hpp"
#include "vkPrograms.hpp"
#include "tcuPlatform.hpp"
#include "tcuTextureUtil.hpp"
#include "deStringUtil.hpp"
#include "deMemory.h"

#include <iomanip>
#include <sstream>
#include <vector>

namespace vkt
{
namespace pipeline
{

using namespace vk;
using de::MovePtr;

namespace
{

class SamplerTest : public vkt::TestCase
{
public:
										SamplerTest						(tcu::TestContext&	testContext,
																		 const char*		name,
																		 const char*		description,
																		 VkImageViewType	imageViewType,
																		 VkFormat			imageFormat,
																		 int				imageSize,
																		 float				samplerLod,
																		 bool				separateStencilUsage);
	virtual								~SamplerTest					(void) {}

	virtual ImageSamplingInstanceParams	getImageSamplingInstanceParams	(VkImageViewType	imageViewType,
																		 VkFormat			imageFormat,
																		 int				imageSize,
																		 float				samplerLod,
																		 bool				separateStencilUsage) const;

	tcu::Vec4							swizzle							(tcu::Vec4 inputData, VkComponentMapping componentMapping, float zeroOrOneValue) const;
	virtual void						initPrograms					(SourceCollections& sourceCollections) const;
	virtual void						checkSupport					(Context& context) const;
	virtual TestInstance*				createInstance					(Context& context) const;
	virtual tcu::UVec2					getRenderSize					(VkImageViewType viewType) const;
	virtual std::vector<Vertex4Tex4>	createVertices					(void) const;
	virtual VkSamplerCreateInfo			getSamplerCreateInfo			(void) const;
	virtual VkComponentMapping			getComponentMapping				(void) const;

	static std::string					getGlslSamplerType				(const tcu::TextureFormat& format, VkImageViewType type);
	static tcu::IVec3					getImageSize					(VkImageViewType viewType, int size);
	static int							getArraySize					(VkImageViewType viewType);

protected:
	VkImageViewType						m_imageViewType;
	VkFormat							m_imageFormat;
	int									m_imageSize;
	float								m_samplerLod;
	bool								m_separateStencilUsage;
};

class SamplerMagFilterTest : public SamplerTest
{
public:
									SamplerMagFilterTest	(tcu::TestContext&	testContext,
															 const char*		name,
															 const char*		description,
															 VkImageViewType	imageViewType,
															 VkFormat			imageFormat,
															 VkFilter			magFilter,
															 bool				separateStencilUsage);
	virtual							~SamplerMagFilterTest	(void) {}
	virtual VkSamplerCreateInfo		getSamplerCreateInfo	(void) const;

private:
	VkFilter						m_magFilter;
};

class SamplerMinFilterTest : public SamplerTest
{
public:
									SamplerMinFilterTest	(tcu::TestContext&	testContext,
															 const char*		name,
															 const char*		description,
															 VkImageViewType	imageViewType,
															 VkFormat			imageFormat,
															 VkFilter			minFilter,
															 bool				separateStencilUsage);
	virtual							~SamplerMinFilterTest	(void) {}
	virtual VkSamplerCreateInfo		getSamplerCreateInfo	(void) const;

private:
	VkFilter						m_minFilter;
};

class SamplerMagReduceFilterTest : public SamplerMagFilterTest
{
public:
												SamplerMagReduceFilterTest	(tcu::TestContext&			testContext,
																			const char*					name,
																			const char*					description,
																			VkImageViewType				imageViewType,
																			VkFormat					imageFormat,
																			VkComponentMapping			componentMapping,
																			VkSamplerReductionModeEXT	reductionMode,
																			bool						separateStencilUsage);

	virtual										~SamplerMagReduceFilterTest	(void) {}
	virtual VkSamplerCreateInfo					getSamplerCreateInfo		(void) const;
	virtual VkComponentMapping					getComponentMapping			(void) const;

private:
	const VkSamplerReductionModeCreateInfoEXT	m_reductionCreaterInfo;
	VkComponentMapping							m_componentMapping;
};

class SamplerMinReduceFilterTest : public SamplerMinFilterTest
{
public:
												SamplerMinReduceFilterTest	(tcu::TestContext&			testContext,
																			 const char*				name,
																			 const char*				description,
																			 VkImageViewType			imageViewType,
																			 VkFormat					imageFormat,
																			 VkComponentMapping			componentMapping,
																			 VkSamplerReductionModeEXT	reductionMode,
																			 bool						separateStencilUsage);

	virtual										~SamplerMinReduceFilterTest	(void) {}
	virtual VkSamplerCreateInfo					getSamplerCreateInfo		(void) const;
	virtual VkComponentMapping					getComponentMapping			(void) const;

private:
	const VkSamplerReductionModeCreateInfoEXT	m_reductionCreaterInfo;
	VkComponentMapping							m_componentMapping;
};

class SamplerLodTest : public SamplerTest
{
public:
									SamplerLodTest			(tcu::TestContext&		testContext,
															 const char*			name,
															 const char*			description,
															 VkImageViewType		imageViewType,
															 VkFormat				imageFormat,
															 VkSamplerMipmapMode	mipmapMode,
															 float					minLod,
															 float					maxLod,
															 float					mipLodBias,
															 float					samplerLod,
															 bool					separateStencilUsage);
	virtual							~SamplerLodTest			(void) {}
	virtual VkSamplerCreateInfo		getSamplerCreateInfo	(void) const;

private:
	VkSamplerMipmapMode				m_mipmapMode;
	float							m_minLod;
	float							m_maxLod;
	float							m_mipLodBias;
};

class SamplerAddressModesTest : public SamplerTest
{
public:
										SamplerAddressModesTest		(tcu::TestContext&		testContext,
																	 const char*			name,
																	 const char*			description,
																	 VkImageViewType		imageViewType,
																	 VkFormat				imageFormat,
																	 VkSamplerAddressMode	addressU,
																	 VkSamplerAddressMode	addressV,
																	 VkSamplerAddressMode	addressW,
																	 VkBorderColor			borderColor,
																	 bool					separateStencilUsage);
	virtual								~SamplerAddressModesTest	(void) {}
	virtual tcu::UVec2					getRenderSize				(VkImageViewType viewType) const;
	virtual std::vector<Vertex4Tex4>	createVertices				(void) const;
	virtual VkSamplerCreateInfo			getSamplerCreateInfo		(void) const;

private:
	VkSamplerAddressMode				m_addressU;
	VkSamplerAddressMode				m_addressV;
	VkSamplerAddressMode				m_addressW;
	VkBorderColor						m_borderColor;
};


// SamplerTest

SamplerTest::SamplerTest	(tcu::TestContext&	testContext,
							 const char*		name,
							 const char*		description,
							 VkImageViewType	imageViewType,
							 VkFormat			imageFormat,
							 int				imageSize,
							 float				samplerLod,
							 bool				separateStencilUsage)
	: vkt::TestCase					(testContext, name, description)
	, m_imageViewType				(imageViewType)
	, m_imageFormat					(imageFormat)
	, m_imageSize					(imageSize)
	, m_samplerLod					(samplerLod)
	, m_separateStencilUsage		(separateStencilUsage)
{
}

ImageSamplingInstanceParams SamplerTest::getImageSamplingInstanceParams (VkImageViewType	imageViewType,
																		 VkFormat			imageFormat,
																		 int				imageSize,
																		 float				samplerLod,
																		 bool				separateStencilUsage) const
{
	const tcu::UVec2				renderSize			= getRenderSize(imageViewType);
	const std::vector<Vertex4Tex4>	vertices			= createVertices();
	const VkSamplerCreateInfo		samplerParams		= getSamplerCreateInfo();
	const VkComponentMapping		componentMapping	= getComponentMapping();

	const VkImageAspectFlags		imageAspect			= (!isCompressedFormat(imageFormat) && hasDepthComponent(mapVkFormat(imageFormat).order)) ? VK_IMAGE_ASPECT_DEPTH_BIT : VK_IMAGE_ASPECT_COLOR_BIT;

	const VkImageSubresourceRange	subresourceRange	=
	{
		imageAspect,										// VkImageAspectFlags	aspectMask;
		0u,													// deUint32				baseMipLevel;
		(deUint32)deLog2Floor32(imageSize) + 1,				// deUint32				mipLevels;
		0u,													// deUint32				baseArrayLayer;
		(deUint32)SamplerTest::getArraySize(imageViewType)	// deUint32				arraySize;
	};

	return ImageSamplingInstanceParams(renderSize, imageViewType, imageFormat,
									   getImageSize(imageViewType, imageSize),
									   getArraySize(imageViewType),
									   componentMapping, subresourceRange,
									   samplerParams, samplerLod, vertices, separateStencilUsage);
}

void SamplerTest::checkSupport (Context& context) const
{
	checkSupportImageSamplingInstance(context, getImageSamplingInstanceParams(m_imageViewType, m_imageFormat, m_imageSize, m_samplerLod, m_separateStencilUsage));
}

tcu::Vec4 SamplerTest::swizzle (tcu::Vec4 inputData, VkComponentMapping componentMapping, float zeroOrOneValue) const
{
	// Remove VK_COMPONENT_SWIZZLE_IDENTITY to avoid addressing channelValues[0]
	const vk::VkComponentMapping nonIdentityMapping =
	{
		componentMapping.r == VK_COMPONENT_SWIZZLE_IDENTITY ? VK_COMPONENT_SWIZZLE_R : componentMapping.r,
		componentMapping.g == VK_COMPONENT_SWIZZLE_IDENTITY ? VK_COMPONENT_SWIZZLE_G : componentMapping.g,
		componentMapping.b == VK_COMPONENT_SWIZZLE_IDENTITY ? VK_COMPONENT_SWIZZLE_B : componentMapping.b,
		componentMapping.a == VK_COMPONENT_SWIZZLE_IDENTITY ? VK_COMPONENT_SWIZZLE_A : componentMapping.a

	};
	// array map with enum VkComponentSwizzle
	const float channelValues[] =
	{
		-1.0f,					// impossible
		zeroOrOneValue,			// SWIZZLE_0
		zeroOrOneValue,			// SWIZZLE_1
		inputData.x(),
		inputData.y(),
		inputData.z(),
		inputData.w(),
		-1.0f
	};

	return tcu::Vec4(channelValues[nonIdentityMapping.r],
					 channelValues[nonIdentityMapping.g],
					 channelValues[nonIdentityMapping.b],
					 channelValues[nonIdentityMapping.a]);
}

void SamplerTest::initPrograms (SourceCollections& sourceCollections) const
{
	std::ostringstream				vertexSrc;
	std::ostringstream				fragmentSrc;
	const char*						texCoordSwizzle	= DE_NULL;
	tcu::TextureFormat				format			= (isCompressedFormat(m_imageFormat)) ? tcu::getUncompressedFormat(mapVkCompressedFormat(m_imageFormat))
																						  : mapVkFormat(m_imageFormat);
	tcu::Vec4						lookupScale;
	tcu::Vec4						lookupBias;

	getLookupScaleBias(m_imageFormat, lookupScale, lookupBias);

	tcu::Vec4						swizzledScale	= swizzle(lookupScale,	getComponentMapping(), 1.0f);
	tcu::Vec4						swizzledBias	= swizzle(lookupBias,	getComponentMapping(), 0.0f);

	switch (m_imageViewType)
	{
		case VK_IMAGE_VIEW_TYPE_1D:
			texCoordSwizzle = "x";
			break;
		case VK_IMAGE_VIEW_TYPE_1D_ARRAY:
		case VK_IMAGE_VIEW_TYPE_2D:
			texCoordSwizzle = "xy";
			break;
		case VK_IMAGE_VIEW_TYPE_2D_ARRAY:
		case VK_IMAGE_VIEW_TYPE_3D:
		case VK_IMAGE_VIEW_TYPE_CUBE:
			texCoordSwizzle = "xyz";
			break;
		case VK_IMAGE_VIEW_TYPE_CUBE_ARRAY:
			texCoordSwizzle = "xyzw";
			break;
		default:
			DE_ASSERT(false);
			break;
	}

	vertexSrc << "#version 440\n"
			  << "layout(location = 0) in vec4 position;\n"
			  << "layout(location = 1) in vec4 texCoords;\n"
			  << "layout(location = 0) out highp vec4 vtxTexCoords;\n"
			  << "out gl_PerVertex {\n"
			  << "	vec4 gl_Position;\n"
			  << "};\n"
			  << "void main (void)\n"
			  << "{\n"
			  << "	gl_Position = position;\n"
			  << "	vtxTexCoords = texCoords;\n"
			  << "}\n";

	fragmentSrc << "#version 440\n"
				<< "layout(set = 0, binding = 0) uniform highp " << getGlslSamplerType(format, m_imageViewType) << " texSampler;\n"
				<< "layout(location = 0) in highp vec4 vtxTexCoords;\n"
				<< "layout(location = 0) out highp vec4 fragColor;\n"
				<< "void main (void)\n"
				<< "{\n"
				<< "	fragColor = ";

	if (m_samplerLod > 0.0f)
		fragmentSrc << "textureLod(texSampler, vtxTexCoords." << texCoordSwizzle << ", " << std::fixed <<  m_samplerLod << ")";
	else
		fragmentSrc << "texture(texSampler, vtxTexCoords." << texCoordSwizzle << ")" << std::fixed;

	fragmentSrc << " * vec4" << std::scientific << swizzledScale << " + vec4" << swizzledBias << ";\n"
				<< "}\n";

	sourceCollections.glslSources.add("tex_vert") << glu::VertexSource(vertexSrc.str());
	sourceCollections.glslSources.add("tex_frag") << glu::FragmentSource(fragmentSrc.str());
}

TestInstance* SamplerTest::createInstance (Context& context) const
{
	return new ImageSamplingInstance(context, getImageSamplingInstanceParams(m_imageViewType, m_imageFormat, m_imageSize, m_samplerLod, m_separateStencilUsage));
}

tcu::UVec2 SamplerTest::getRenderSize (VkImageViewType viewType) const
{
	if (viewType == VK_IMAGE_VIEW_TYPE_1D || viewType == VK_IMAGE_VIEW_TYPE_2D)
	{
		return tcu::UVec2(16u, 16u);
	}
	else
	{
		return tcu::UVec2(16u * 3u, 16u * 2u);
	}
}

std::vector<Vertex4Tex4> SamplerTest::createVertices (void) const
{
	std::vector<Vertex4Tex4> vertices = createTestQuadMosaic(m_imageViewType);
	// Adjust texture coordinate to avoid doing NEAREST filtering exactly on texel boundaries.
	// TODO: Would be nice to base this on number of texels and subtexel precision. But this
	// seems to work.
	for (unsigned int i = 0; i < vertices.size(); ++i) {
		vertices[i].texCoord += tcu::Vec4(0.002f, 0.002f, 0.002f, 0.0f);
	}
	return vertices;
}

VkSamplerCreateInfo SamplerTest::getSamplerCreateInfo (void) const
{
	const VkSamplerCreateInfo defaultSamplerParams =
	{
		VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO,									// VkStructureType			sType;
		DE_NULL,																// const void*				pNext;
		0u,																		// VkSamplerCreateFlags		flags;
		VK_FILTER_NEAREST,														// VkFilter					magFilter;
		VK_FILTER_NEAREST,														// VkFilter					minFilter;
		VK_SAMPLER_MIPMAP_MODE_NEAREST,											// VkSamplerMipmapMode		mipmapMode;
		VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,									// VkSamplerAddressMode		addressModeU;
		VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,									// VkSamplerAddressMode		addressModeV;
		VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,									// VkSamplerAddressMode		addressModeW;
		0.0f,																	// float					mipLodBias;
		VK_FALSE,																// VkBool32					anisotropyEnable;
		1.0f,																	// float					maxAnisotropy;
		false,																	// VkBool32					compareEnable;
		VK_COMPARE_OP_NEVER,													// VkCompareOp				compareOp;
		0.0f,																	// float					minLod;
		0.25f,																	// float					maxLod;
		getFormatBorderColor(BORDER_COLOR_TRANSPARENT_BLACK, m_imageFormat),	// VkBorderColor			borderColor;
		false																	// VkBool32					unnormalizedCoordinates;
	};

	return defaultSamplerParams;
}

VkComponentMapping SamplerTest::getComponentMapping (void) const
{
	const VkComponentMapping	componentMapping	= { VK_COMPONENT_SWIZZLE_R, VK_COMPONENT_SWIZZLE_G, VK_COMPONENT_SWIZZLE_B, VK_COMPONENT_SWIZZLE_A };
	return componentMapping;
}

std::string SamplerTest::getGlslSamplerType (const tcu::TextureFormat& format, VkImageViewType type)
{
	std::ostringstream samplerType;

	if (tcu::getTextureChannelClass(format.type) == tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER)
		samplerType << "u";
	else if (tcu::getTextureChannelClass(format.type) == tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER)
		samplerType << "i";

	switch (type)
	{
		case VK_IMAGE_VIEW_TYPE_1D:
			samplerType << "sampler1D";
			break;

		case VK_IMAGE_VIEW_TYPE_1D_ARRAY:
			samplerType << "sampler1DArray";
			break;

		case VK_IMAGE_VIEW_TYPE_2D:
			samplerType << "sampler2D";
			break;

		case VK_IMAGE_VIEW_TYPE_2D_ARRAY:
			samplerType << "sampler2DArray";
			break;

		case VK_IMAGE_VIEW_TYPE_3D:
			samplerType << "sampler3D";
			break;

		case VK_IMAGE_VIEW_TYPE_CUBE:
			samplerType << "samplerCube";
			break;

		case VK_IMAGE_VIEW_TYPE_CUBE_ARRAY:
			samplerType << "samplerCubeArray";
			break;

		default:
			DE_FATAL("Unknown image view type");
			break;
	}

	return samplerType.str();
}

tcu::IVec3 SamplerTest::getImageSize (VkImageViewType viewType, int size)
{
	switch (viewType)
	{
		case VK_IMAGE_VIEW_TYPE_1D:
		case VK_IMAGE_VIEW_TYPE_1D_ARRAY:
			return tcu::IVec3(size, 1, 1);

		case VK_IMAGE_VIEW_TYPE_3D:
			return tcu::IVec3(size, size, 4);

		default:
			break;
	}

	return tcu::IVec3(size, size, 1);
}

int SamplerTest::getArraySize (VkImageViewType viewType)
{
	switch (viewType)
	{
		case VK_IMAGE_VIEW_TYPE_1D_ARRAY:
		case VK_IMAGE_VIEW_TYPE_2D_ARRAY:
		case VK_IMAGE_VIEW_TYPE_CUBE:
			return 6;

		case VK_IMAGE_VIEW_TYPE_CUBE_ARRAY:
			return 36;

		default:
			break;
	}

	return 1;
}


// SamplerMagFilterTest

SamplerMagFilterTest::SamplerMagFilterTest (tcu::TestContext&	testContext,
											const char*			name,
											const char*			description,
											VkImageViewType		imageViewType,
											VkFormat			imageFormat,
											VkFilter			magFilter,
											bool				separateStencilUsage)
	: SamplerTest	(testContext, name, description, imageViewType, imageFormat, 8, 0.0f, separateStencilUsage)
	, m_magFilter	(magFilter)
{
}

VkSamplerCreateInfo SamplerMagFilterTest::getSamplerCreateInfo (void) const
{
	VkSamplerCreateInfo samplerParams = SamplerTest::getSamplerCreateInfo();
	samplerParams.magFilter = m_magFilter;

	return samplerParams;
}


// SamplerMinFilterTest

SamplerMinFilterTest::SamplerMinFilterTest (tcu::TestContext&	testContext,
											const char*			name,
											const char*			description,
											VkImageViewType		imageViewType,
											VkFormat			imageFormat,
											VkFilter			minFilter,
											bool				separateStencilUsage)
	: SamplerTest	(testContext, name, description, imageViewType, imageFormat, 32, 0.0f, separateStencilUsage)
	, m_minFilter	(minFilter)
{
}

VkSamplerCreateInfo SamplerMinFilterTest::getSamplerCreateInfo (void) const
{
	VkSamplerCreateInfo samplerParams = SamplerTest::getSamplerCreateInfo();
	samplerParams.minFilter = m_minFilter;
	// set minLod to epsilon, to force use of the minFilter
	samplerParams.minLod = 0.01f;

	return samplerParams;
}


namespace
{

VkSamplerReductionModeCreateInfoEXT getSamplerReductionCreateInfo (VkSamplerReductionModeEXT reductionMode)
{
	const VkSamplerReductionModeCreateInfoEXT	 ret =
	{
		VK_STRUCTURE_TYPE_SAMPLER_REDUCTION_MODE_CREATE_INFO_EXT,	// VkStructureType				sType
		DE_NULL,													// const void*					pNext
		reductionMode												// VkSamplerReductionModeEXT	reductionMode
	};
	return ret;
}

}


// SamplerMagReduceFilterTest

SamplerMagReduceFilterTest::SamplerMagReduceFilterTest (tcu::TestContext&			testContext,
														const char*					name,
														const char*					description,
														VkImageViewType				imageViewType,
														VkFormat					imageFormat,
														VkComponentMapping			componentMapping,
														VkSamplerReductionModeEXT	reductionMode,
														bool						separateStencilUsage)
	: SamplerMagFilterTest		(testContext, name, description, imageViewType, imageFormat, VK_FILTER_LINEAR, separateStencilUsage)
	, m_reductionCreaterInfo	(getSamplerReductionCreateInfo(reductionMode))
	, m_componentMapping		(componentMapping)
{
}

VkSamplerCreateInfo SamplerMagReduceFilterTest::getSamplerCreateInfo (void) const
{
	VkSamplerCreateInfo samplerParams	= SamplerMagFilterTest::getSamplerCreateInfo();

	samplerParams.pNext					= &m_reductionCreaterInfo;

	return samplerParams;
}

VkComponentMapping SamplerMagReduceFilterTest::getComponentMapping (void) const
{
	return m_componentMapping;
}

// SamplerMinReduceFilterTest

SamplerMinReduceFilterTest::SamplerMinReduceFilterTest (tcu::TestContext&			testContext,
														const char*					name,
														const char*					description,
														VkImageViewType				imageViewType,
														VkFormat					imageFormat,
														VkComponentMapping			componentMapping,
														VkSamplerReductionModeEXT	reductionMode,
														bool						separateStencilUsage)
	: SamplerMinFilterTest		(testContext, name, description, imageViewType, imageFormat, VK_FILTER_LINEAR, separateStencilUsage)
	, m_reductionCreaterInfo	(getSamplerReductionCreateInfo(reductionMode))
	, m_componentMapping		(componentMapping)
{
}

VkSamplerCreateInfo SamplerMinReduceFilterTest::getSamplerCreateInfo (void) const
{
	VkSamplerCreateInfo samplerParams	= SamplerMinFilterTest::getSamplerCreateInfo();

	samplerParams.pNext					= &m_reductionCreaterInfo;

	return samplerParams;
}

VkComponentMapping SamplerMinReduceFilterTest::getComponentMapping (void) const
{
	return m_componentMapping;
}

// SamplerLodTest

SamplerLodTest::SamplerLodTest (tcu::TestContext&	testContext,
								const char*			name,
								const char*			description,
								VkImageViewType		imageViewType,
								VkFormat			imageFormat,
								VkSamplerMipmapMode	mipmapMode,
								float				minLod,
								float				maxLod,
								float				mipLodBias,
								float				samplerLod,
								bool				separateStencilUsage)
	: SamplerTest	(testContext, name, description, imageViewType, imageFormat, 32, samplerLod, separateStencilUsage)
	, m_mipmapMode	(mipmapMode)
	, m_minLod		(minLod)
	, m_maxLod		(maxLod)
	, m_mipLodBias	(mipLodBias)
{
}

VkSamplerCreateInfo SamplerLodTest::getSamplerCreateInfo (void) const
{
	VkSamplerCreateInfo samplerParams = SamplerTest::getSamplerCreateInfo();

	samplerParams.mipmapMode	= m_mipmapMode;
	samplerParams.minLod		= m_minLod;
	samplerParams.maxLod		= m_maxLod;
	samplerParams.mipLodBias	= m_mipLodBias;

	return samplerParams;
}


// SamplerAddressModesTest

SamplerAddressModesTest::SamplerAddressModesTest (tcu::TestContext&		testContext,
												  const char*			name,
												  const char*			description,
												  VkImageViewType		imageViewType,
												  VkFormat				imageFormat,
												  VkSamplerAddressMode	addressU,
												  VkSamplerAddressMode	addressV,
												  VkSamplerAddressMode	addressW,
												  VkBorderColor			borderColor,
												  bool					separateStencilUsage)
	: SamplerTest	(testContext, name, description, imageViewType, imageFormat, 8, 0.0f, separateStencilUsage)
	, m_addressU	(addressU)
	, m_addressV	(addressV)
	, m_addressW	(addressW)
	, m_borderColor	(borderColor)
{
}

tcu::UVec2 SamplerAddressModesTest::getRenderSize (VkImageViewType viewType) const
{
	return 4u * SamplerTest::getRenderSize(viewType);
}

std::vector<Vertex4Tex4> SamplerAddressModesTest::createVertices (void) const
{
	std::vector<Vertex4Tex4> vertices = SamplerTest::createVertices();

	switch (m_imageViewType)
	{
		case VK_IMAGE_VIEW_TYPE_1D: case VK_IMAGE_VIEW_TYPE_1D_ARRAY:
			for (size_t vertexNdx = 0; vertexNdx < vertices.size(); vertexNdx++)
				vertices[vertexNdx].texCoord.x() = (vertices[vertexNdx].texCoord.x() - 0.5f) * 4.0f;

			break;

		case VK_IMAGE_VIEW_TYPE_2D:
		case VK_IMAGE_VIEW_TYPE_2D_ARRAY:
			for (size_t vertexNdx = 0; vertexNdx < vertices.size(); vertexNdx++)
				vertices[vertexNdx].texCoord.xy() = (vertices[vertexNdx].texCoord.swizzle(0, 1) - tcu::Vec2(0.5f)) * 4.0f;

			break;

		case VK_IMAGE_VIEW_TYPE_3D:
			for (size_t vertexNdx = 0; vertexNdx < vertices.size(); vertexNdx++)
				vertices[vertexNdx].texCoord.xyz() = (vertices[vertexNdx].texCoord.swizzle(0, 1, 2) - tcu::Vec3(0.5f)) * 4.0f;

			break;

		case VK_IMAGE_VIEW_TYPE_CUBE:
		case VK_IMAGE_VIEW_TYPE_CUBE_ARRAY:
			break;

		default:
			DE_ASSERT(false);
	}

	return vertices;
}

VkSamplerCreateInfo SamplerAddressModesTest::getSamplerCreateInfo (void) const
{
	VkSamplerCreateInfo samplerParams = SamplerTest::getSamplerCreateInfo();
	samplerParams.addressModeU	= m_addressU;
	samplerParams.addressModeV	= m_addressV;
	samplerParams.addressModeW	= m_addressW;
	samplerParams.borderColor	= m_borderColor;

	return samplerParams;
}


// Utilities to create test nodes

std::string getFormatCaseName (const VkFormat format)
{
	const std::string fullName = getFormatName(format);

	DE_ASSERT(de::beginsWith(fullName, "VK_FORMAT_"));

	return de::toLower(fullName.substr(10));
}

MovePtr<tcu::TestCaseGroup> createSamplerMagFilterTests (tcu::TestContext& testCtx, VkImageViewType imageViewType, VkFormat imageFormat, bool separateStencilUsage)
{
	MovePtr<tcu::TestCaseGroup> samplerMagFilterTests (new tcu::TestCaseGroup(testCtx, "mag_filter", "Tests for magnification filter"));

	if (isCompressedFormat(imageFormat) || (!isIntFormat(imageFormat) && !isUintFormat(imageFormat)))
		samplerMagFilterTests->addChild(new SamplerMagFilterTest(testCtx, "linear", "Magnifies image using VK_FILTER_LINEAR", imageViewType, imageFormat, VK_FILTER_LINEAR, separateStencilUsage));
	samplerMagFilterTests->addChild(new SamplerMagFilterTest(testCtx, "nearest", "Magnifies image using VK_FILTER_NEAREST", imageViewType, imageFormat, VK_FILTER_NEAREST, separateStencilUsage));

	return samplerMagFilterTests;
}

MovePtr<tcu::TestCaseGroup> createSamplerMinFilterTests (tcu::TestContext& testCtx, VkImageViewType imageViewType, VkFormat imageFormat, bool separateStencilUsage)
{
	MovePtr<tcu::TestCaseGroup> samplerMinFilterTests (new tcu::TestCaseGroup(testCtx, "min_filter", "Tests for minification filter"));

	if (isCompressedFormat(imageFormat) || (!isIntFormat(imageFormat) && !isUintFormat(imageFormat)))
		samplerMinFilterTests->addChild(new SamplerMinFilterTest(testCtx, "linear", "Minifies image using VK_FILTER_LINEAR", imageViewType, imageFormat, VK_FILTER_LINEAR, separateStencilUsage));
	samplerMinFilterTests->addChild(new SamplerMinFilterTest(testCtx, "nearest", "Minifies image using VK_FILTER_NEAREST", imageViewType, imageFormat, VK_FILTER_NEAREST, separateStencilUsage));

	return samplerMinFilterTests;
}

const VkComponentMapping reduceFilterComponentMappings[]	=
{
	// filterMinmaxImageComponentMapping  == false - compatible mapping:
	{ VK_COMPONENT_SWIZZLE_IDENTITY,	VK_COMPONENT_SWIZZLE_ZERO,	VK_COMPONENT_SWIZZLE_ZERO,		VK_COMPONENT_SWIZZLE_ZERO	},

	// other mappings
	{ VK_COMPONENT_SWIZZLE_R,			VK_COMPONENT_SWIZZLE_G,		VK_COMPONENT_SWIZZLE_B,			VK_COMPONENT_SWIZZLE_A		},
	{ VK_COMPONENT_SWIZZLE_B,			VK_COMPONENT_SWIZZLE_G,		VK_COMPONENT_SWIZZLE_R,			VK_COMPONENT_SWIZZLE_A		},
	{ VK_COMPONENT_SWIZZLE_ONE,			VK_COMPONENT_SWIZZLE_R,		VK_COMPONENT_SWIZZLE_R,			VK_COMPONENT_SWIZZLE_R		},
};

static std::string getShortComponentSwizzleName (VkComponentSwizzle componentSwizzle)
{
	const std::string	fullName	= getComponentSwizzleName(componentSwizzle);
	const char*			prefix		= "VK_COMPONENT_SWIZZLE_";

	DE_ASSERT(de::beginsWith(fullName, prefix));

	return de::toLower(fullName.substr(deStrnlen(prefix, -1)));
}

static std::string getComponentMappingGroupName (const VkComponentMapping& componentMapping)
{
	std::ostringstream name;

	name << "comp_";

	name << getShortComponentSwizzleName(componentMapping.r) << "_"
		 << getShortComponentSwizzleName(componentMapping.g) << "_"
		 << getShortComponentSwizzleName(componentMapping.b) << "_"
		 << getShortComponentSwizzleName(componentMapping.a);

	return name.str();
}

MovePtr<tcu::TestCaseGroup> createSamplerMagReduceFilterTests (tcu::TestContext& testCtx, VkImageViewType imageViewType, VkFormat imageFormat, bool separateStencilUsage)
{
	MovePtr<tcu::TestCaseGroup> samplerMagReduceFilterTests (new tcu::TestCaseGroup(testCtx, "mag_reduce", "Tests for magnification reduce filter"));

	for (size_t i = 0; i < DE_LENGTH_OF_ARRAY(reduceFilterComponentMappings); ++i)
	{
		const VkComponentMapping&	mapping		= reduceFilterComponentMappings[i];

		MovePtr<tcu::TestCaseGroup> componentGroup (new tcu::TestCaseGroup(testCtx, getComponentMappingGroupName(mapping).c_str(), "Group for given view component mapping"));

		if (isCompressedFormat(imageFormat) || (!isIntFormat(imageFormat) && !isUintFormat(imageFormat)))
		{
			componentGroup->addChild(new SamplerMagReduceFilterTest(testCtx, "average", "Magnifies image using VK_SAMPLER_REDUCTION_MODE_WEIGHTED_AVERAGE_EXT", imageViewType, imageFormat, mapping, VK_SAMPLER_REDUCTION_MODE_WEIGHTED_AVERAGE_EXT, separateStencilUsage));
		}
		componentGroup->addChild(new SamplerMagReduceFilterTest(testCtx, "min", "Magnifies and reduces image using VK_SAMPLER_REDUCTION_MODE_MIN_EXT", imageViewType, imageFormat, mapping, VK_SAMPLER_REDUCTION_MODE_MIN_EXT, separateStencilUsage));
		componentGroup->addChild(new SamplerMagReduceFilterTest(testCtx, "max", "Magnifies and reduces image using VK_SAMPLER_REDUCTION_MODE_MAX_EXT", imageViewType, imageFormat, mapping, VK_SAMPLER_REDUCTION_MODE_MAX_EXT, separateStencilUsage));
		samplerMagReduceFilterTests->addChild(componentGroup.release());
	}
	return samplerMagReduceFilterTests;
}

MovePtr<tcu::TestCaseGroup> createSamplerMinReduceFilterTests (tcu::TestContext& testCtx, VkImageViewType imageViewType, VkFormat imageFormat, bool separateStencilUsage)
{
	MovePtr<tcu::TestCaseGroup> samplerMinReduceFilterTests (new tcu::TestCaseGroup(testCtx, "min_reduce", "Tests for minification reduce filter"));

	for (size_t i = 0; i < DE_LENGTH_OF_ARRAY(reduceFilterComponentMappings); ++i)
	{
		const VkComponentMapping&	mapping = reduceFilterComponentMappings[i];

		MovePtr<tcu::TestCaseGroup> componentGroup (new tcu::TestCaseGroup(testCtx, getComponentMappingGroupName(mapping).c_str(), "Group for given view component mapping"));

		if (isCompressedFormat(imageFormat) || (!isIntFormat(imageFormat) && !isUintFormat(imageFormat)))
		{
			componentGroup->addChild(new SamplerMinReduceFilterTest(testCtx, "average", "Minifies image using VK_SAMPLER_REDUCTION_MODE_WEIGHTED_AVERAGE_EXT", imageViewType, imageFormat, mapping, VK_SAMPLER_REDUCTION_MODE_WEIGHTED_AVERAGE_EXT, separateStencilUsage));
		}
		componentGroup->addChild(new SamplerMinReduceFilterTest(testCtx, "min", "Minifies and reduces image using VK_SAMPLER_REDUCTION_MODE_MIN_EXT", imageViewType, imageFormat, mapping, VK_SAMPLER_REDUCTION_MODE_MIN_EXT, separateStencilUsage));
		componentGroup->addChild(new SamplerMinReduceFilterTest(testCtx, "max", "Minifies and reduces image using VK_SAMPLER_REDUCTION_MODE_MAX_EXT", imageViewType, imageFormat, mapping, VK_SAMPLER_REDUCTION_MODE_MAX_EXT, separateStencilUsage));
		samplerMinReduceFilterTests->addChild(componentGroup.release());
	}
	return samplerMinReduceFilterTests;
}

MovePtr<tcu::TestCaseGroup> createSamplerLodTests (tcu::TestContext& testCtx, VkImageViewType imageViewType, VkFormat imageFormat, VkSamplerMipmapMode mipmapMode, bool separateStencilUsage)
{
	struct TestCaseConfig
	{
		const char*	name;
		const char*	description;
		float		minLod;
		float		maxLod;
		float		mipLodBias;
		float		lod;
	};

	TestCaseConfig testCaseConfigs [] =
	{
		{ "equal_min_3_max_3",		"minLod = 3, maxLod = 3, mipLodBias = 0, lod = 0",		3.0f, 3.0f, 0.0f, 0.0f },
		{ "select_min_1",			"minLod = 1, maxLod = 5, mipLodBias = 0, lod = 0",		1.0f, 5.0f, 0.0f, 0.0f },
		{ "select_max_4",			"minLod = 0, maxLod = 4, mipLodBias = 0, lod = 5",		0.0f, 4.0f, 0.0f, 5.0f },
		{ "select_bias_2_1",		"minLod = 0, maxLod = 2.1, mipLodBias = 5.0, lod = 0",	0.0f, 2.1f, 5.0f, 0.0f },
		{ "select_bias_2_5",		"minLod = 0, maxLod = 5, mipLodBias = 2.5, lod = 0",	0.0f, 5.0f, 2.5f, 0.00001f },
		{ "select_bias_3_1",		"minLod = 0, maxLod = 5, mipLodBias = -0.9, lod = 4.0",	0.0f, 5.0f, -0.9f, 4.0f },
		{ "select_bias_3_7",		"minLod = 0, maxLod = 5, mipLodBias = 3.0, lod = 0.7",	0.0f, 5.0f, 3.0f, 0.7f },
	};

	MovePtr<tcu::TestCaseGroup> samplerLodTests (new tcu::TestCaseGroup(testCtx, "lod", "Tests for sampler LOD"));

	for (int configNdx = 0; configNdx < DE_LENGTH_OF_ARRAY(testCaseConfigs); configNdx++)
	{
		const TestCaseConfig& config = testCaseConfigs[configNdx];

		samplerLodTests->addChild(new SamplerLodTest(testCtx, config.name, config.description, imageViewType, imageFormat, mipmapMode, config.minLod, config.maxLod, config.mipLodBias, config.lod, separateStencilUsage));
	}

	return samplerLodTests;
}

MovePtr<tcu::TestCaseGroup> createSamplerMipmapTests (tcu::TestContext& testCtx, VkImageViewType imageViewType, VkFormat imageFormat, bool separateStencilUsage)
{
	MovePtr<tcu::TestCaseGroup> samplerMipmapTests (new tcu::TestCaseGroup(testCtx, "mipmap", "Tests for mipmap modes"));

	// Mipmap mode: nearest
	MovePtr<tcu::TestCaseGroup> mipmapNearestTests (new tcu::TestCaseGroup(testCtx, "nearest", "Uses VK_TEX_MIPMAP_MODE_NEAREST"));
	mipmapNearestTests->addChild(createSamplerLodTests(testCtx, imageViewType, imageFormat, VK_SAMPLER_MIPMAP_MODE_NEAREST, separateStencilUsage).release());
	samplerMipmapTests->addChild(mipmapNearestTests.release());

	// Mipmap mode: linear
	if (isCompressedFormat(imageFormat) || (!isIntFormat(imageFormat) && !isUintFormat(imageFormat)))
	{
		MovePtr<tcu::TestCaseGroup> mipmapLinearTests(new tcu::TestCaseGroup(testCtx, "linear", "Uses VK_TEX_MIPMAP_MODE_LINEAR"));
		mipmapLinearTests->addChild(createSamplerLodTests(testCtx, imageViewType, imageFormat, VK_SAMPLER_MIPMAP_MODE_LINEAR, separateStencilUsage).release());
		samplerMipmapTests->addChild(mipmapLinearTests.release());
	}

	return samplerMipmapTests;
}

std::string getAddressModesCaseName (VkSamplerAddressMode u, VkSamplerAddressMode v, VkSamplerAddressMode w, BorderColor border)
{
	static const char* borderColorNames[BORDER_COLOR_COUNT] =
	{
		"opaque_black",
		"opaque_white",
		"transparent_black",
	};

	std::ostringstream caseName;

	if (u == v && v == w)
	{
		const std::string fullName = getSamplerAddressModeName(u);
		DE_ASSERT(de::beginsWith(fullName, "VK_SAMPLER_ADDRESS_"));

		caseName << "all_";
		caseName << de::toLower(fullName.substr(19));

		if (u == VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER)
		{
			caseName << "_" << borderColorNames[border];
		}
	}
	else
	{
		const std::string fullNameU = getSamplerAddressModeName(u);
		const std::string fullNameV = getSamplerAddressModeName(v);
		const std::string fullNameW = getSamplerAddressModeName(w);

		DE_ASSERT(de::beginsWith(fullNameU, "VK_SAMPLER_ADDRESS_"));
		DE_ASSERT(de::beginsWith(fullNameV, "VK_SAMPLER_ADDRESS_"));
		DE_ASSERT(de::beginsWith(fullNameW, "VK_SAMPLER_ADDRESS_"));

		caseName << "uvw"
				 << "_" << de::toLower(fullNameU.substr(19))
				 << "_" << de::toLower(fullNameV.substr(19))
				 << "_" << de::toLower(fullNameW.substr(19));
	}

	return caseName.str();
}

MovePtr<tcu::TestCaseGroup> createSamplerAddressModesTests (tcu::TestContext& testCtx, VkImageViewType imageViewType, VkFormat imageFormat, bool separateStencilUsage)
{
	struct TestCaseConfig
	{
		VkSamplerAddressMode	u;
		VkSamplerAddressMode	v;
		VkSamplerAddressMode	w;
		BorderColor				border;
	};

	const TestCaseConfig testCaseConfigs[] =
	{
		// All address modes equal
		{ VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,		VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,			VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,			BORDER_COLOR_TRANSPARENT_BLACK },
		{ VK_SAMPLER_ADDRESS_MODE_REPEAT,				VK_SAMPLER_ADDRESS_MODE_REPEAT,					VK_SAMPLER_ADDRESS_MODE_REPEAT,					BORDER_COLOR_TRANSPARENT_BLACK },
		{ VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT,		VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT,		VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT,		BORDER_COLOR_TRANSPARENT_BLACK },
		{ VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE,	VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE,	VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE,	BORDER_COLOR_TRANSPARENT_BLACK },

		// All address modes equal using border color
		{ VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		BORDER_COLOR_TRANSPARENT_BLACK },
		{ VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		BORDER_COLOR_OPAQUE_BLACK },
		{ VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		BORDER_COLOR_OPAQUE_WHITE },

		// Pairwise combinations of address modes not covered by previous tests
		{ VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE,	VK_SAMPLER_ADDRESS_MODE_REPEAT,					BORDER_COLOR_OPAQUE_WHITE},
		{ VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT,		VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE,	BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		VK_SAMPLER_ADDRESS_MODE_REPEAT,					VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT,		BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,			VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,			BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE,	VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT,		BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE,	VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE,	VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE,	VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT,		VK_SAMPLER_ADDRESS_MODE_REPEAT,					BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE,	VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,			VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE,	BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE,	VK_SAMPLER_ADDRESS_MODE_REPEAT,					VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,			BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT,		VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE,	BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_REPEAT,				VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE,	VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE,	BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT,		VK_SAMPLER_ADDRESS_MODE_REPEAT,					VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT,		VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,			VK_SAMPLER_ADDRESS_MODE_REPEAT,					BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_REPEAT,				VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,			BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_REPEAT,				VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT,		VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_REPEAT,				VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,			VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT,		BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT,		VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE,	VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,			BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,		VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,			VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,		VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,		VK_SAMPLER_ADDRESS_MODE_REPEAT,					BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,		VK_SAMPLER_ADDRESS_MODE_REPEAT,					VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE,	BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,		VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT,		VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,			BORDER_COLOR_OPAQUE_WHITE },
		{ VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,		VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE,	VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT,		BORDER_COLOR_OPAQUE_WHITE },
	};

	MovePtr<tcu::TestCaseGroup> samplerAddressModesTests (new tcu::TestCaseGroup(testCtx, "address_modes", "Tests for address modes"));

	for (int configNdx = 0; configNdx < DE_LENGTH_OF_ARRAY(testCaseConfigs); configNdx++)
	{
		const TestCaseConfig& config = testCaseConfigs[configNdx];

		samplerAddressModesTests->addChild(new SamplerAddressModesTest(testCtx,
																	   getAddressModesCaseName(config.u, config.v, config.w, config.border).c_str(),
																	   "",
																	   imageViewType,
																	   imageFormat,
																	   config.u, config.v, config.w,
																	   getFormatBorderColor(config.border, imageFormat),
																	   separateStencilUsage));
	}

	return samplerAddressModesTests;
}

} // anonymous

tcu::TestCaseGroup* createAllFormatsSamplerTests (tcu::TestContext& testCtx, bool separateStencilUsage = false)
{
	const struct
	{
		VkImageViewType		type;
		const char*			name;
	}
	imageViewTypes[] =
	{
		{ VK_IMAGE_VIEW_TYPE_1D,			"1d" },
		{ VK_IMAGE_VIEW_TYPE_1D_ARRAY,		"1d_array" },
		{ VK_IMAGE_VIEW_TYPE_2D,			"2d" },
		{ VK_IMAGE_VIEW_TYPE_2D_ARRAY,		"2d_array" },
		{ VK_IMAGE_VIEW_TYPE_3D,			"3d" },
		{ VK_IMAGE_VIEW_TYPE_CUBE,			"cube" },
		{ VK_IMAGE_VIEW_TYPE_CUBE_ARRAY,	"cube_array" }
	};

	const VkFormat formats[] =
	{
		// Packed formats
		VK_FORMAT_R4G4_UNORM_PACK8,
		VK_FORMAT_R4G4B4A4_UNORM_PACK16,
		VK_FORMAT_R5G6B5_UNORM_PACK16,
		VK_FORMAT_R5G5B5A1_UNORM_PACK16,
		VK_FORMAT_A2B10G10R10_UNORM_PACK32,
		VK_FORMAT_A2R10G10B10_UINT_PACK32,
		VK_FORMAT_B10G11R11_UFLOAT_PACK32,
		VK_FORMAT_E5B9G9R9_UFLOAT_PACK32,
		VK_FORMAT_B4G4R4A4_UNORM_PACK16,
		VK_FORMAT_B5G5R5A1_UNORM_PACK16,

		// Pairwise combinations of 8-bit channel formats, UNORM/SNORM/SINT/UINT/SRGB type x 1-to-4 channels x RGBA/BGRA order
		VK_FORMAT_R8_SRGB,
		VK_FORMAT_R8G8B8_UINT,
		VK_FORMAT_B8G8R8A8_SINT,
		VK_FORMAT_R8G8_UNORM,
		VK_FORMAT_B8G8R8_SNORM,
		VK_FORMAT_R8G8B8A8_SNORM,
		VK_FORMAT_R8G8_UINT,
		VK_FORMAT_R8_SINT,
		VK_FORMAT_R8G8B8A8_SRGB,
		VK_FORMAT_R8G8B8A8_UNORM,
		VK_FORMAT_B8G8R8A8_UNORM,
		VK_FORMAT_B8G8R8_SRGB,
		VK_FORMAT_R8G8_SRGB,
		VK_FORMAT_R8_UINT,
		VK_FORMAT_R8G8B8A8_UINT,
		VK_FORMAT_R8G8_SINT,
		VK_FORMAT_R8_SNORM,
		VK_FORMAT_B8G8R8_SINT,
		VK_FORMAT_R8G8_SNORM,
		VK_FORMAT_B8G8R8_UNORM,
		VK_FORMAT_R8_UNORM,

		// Pairwise combinations of 16/32-bit channel formats x SINT/UINT/SFLOAT type x 1-to-4 channels
		VK_FORMAT_R32G32_SFLOAT,
		VK_FORMAT_R32G32B32_UINT,
		VK_FORMAT_R16G16B16A16_SFLOAT,
		VK_FORMAT_R16G16_UINT,
		VK_FORMAT_R32G32B32A32_SINT,
		VK_FORMAT_R16G16B16_SINT,
		VK_FORMAT_R16_SFLOAT,
		VK_FORMAT_R32_SINT,
		VK_FORMAT_R32_UINT,
		VK_FORMAT_R16G16B16_SFLOAT,
		VK_FORMAT_R16G16_SINT,

		// More 16/32-bit formats required for testing VK_EXT_sampler_filter_minmax
		VK_FORMAT_R16_SNORM,
		VK_FORMAT_R32_SFLOAT,

		// Scaled formats
		VK_FORMAT_R8G8B8A8_SSCALED,
		VK_FORMAT_A2R10G10B10_USCALED_PACK32,

		// Compressed formats
		VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK,
		VK_FORMAT_ETC2_R8G8B8_SRGB_BLOCK,
		VK_FORMAT_ETC2_R8G8B8A1_UNORM_BLOCK,
		VK_FORMAT_ETC2_R8G8B8A1_SRGB_BLOCK,
		VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK,
		VK_FORMAT_ETC2_R8G8B8A8_SRGB_BLOCK,
		VK_FORMAT_EAC_R11_UNORM_BLOCK,
		VK_FORMAT_EAC_R11_SNORM_BLOCK,
		VK_FORMAT_EAC_R11G11_UNORM_BLOCK,
		VK_FORMAT_EAC_R11G11_SNORM_BLOCK,
		VK_FORMAT_ASTC_4x4_UNORM_BLOCK,
		VK_FORMAT_ASTC_5x4_SRGB_BLOCK,
		VK_FORMAT_ASTC_6x5_UNORM_BLOCK,
		VK_FORMAT_ASTC_6x6_SRGB_BLOCK,
		VK_FORMAT_ASTC_8x6_UNORM_BLOCK,
		VK_FORMAT_ASTC_8x8_SRGB_BLOCK,
		VK_FORMAT_ASTC_10x6_UNORM_BLOCK,
		VK_FORMAT_ASTC_10x8_SRGB_BLOCK,
		VK_FORMAT_ASTC_12x10_UNORM_BLOCK,
		VK_FORMAT_ASTC_12x12_SRGB_BLOCK,

		// Depth formats required for testing VK_EXT_sampler_filter_minmax
		VK_FORMAT_D16_UNORM,
		VK_FORMAT_X8_D24_UNORM_PACK32,
		VK_FORMAT_D32_SFLOAT,
		VK_FORMAT_D16_UNORM_S8_UINT,
		VK_FORMAT_D24_UNORM_S8_UINT,
		VK_FORMAT_D32_SFLOAT_S8_UINT,
	};

	de::MovePtr<tcu::TestCaseGroup> viewTypeTests		(new tcu::TestCaseGroup(testCtx, "view_type", ""));

	for (int viewTypeNdx = 0; viewTypeNdx < DE_LENGTH_OF_ARRAY(imageViewTypes); viewTypeNdx++)
	{
		const VkImageViewType			viewType		= imageViewTypes[viewTypeNdx].type;
		de::MovePtr<tcu::TestCaseGroup>	viewTypeGroup	(new tcu::TestCaseGroup(testCtx, imageViewTypes[viewTypeNdx].name, (std::string("Uses a ") + imageViewTypes[viewTypeNdx].name + " view").c_str()));
		de::MovePtr<tcu::TestCaseGroup>	formatTests		(new tcu::TestCaseGroup(testCtx, "format", "Tests samplable formats"));

		for (size_t formatNdx = 0; formatNdx < DE_LENGTH_OF_ARRAY(formats); formatNdx++)
		{
			const VkFormat	format			= formats[formatNdx];
			const bool		isCompressed	= isCompressedFormat(format);
			const bool		isDepthStencil	= !isCompressed
											  && tcu::hasDepthComponent(mapVkFormat(format).order) && tcu::hasStencilComponent(mapVkFormat(format).order);
			if (isCompressed)
			{
				// Do not use compressed formats with 1D and 1D array textures.
				if (viewType == VK_IMAGE_VIEW_TYPE_1D || viewType == VK_IMAGE_VIEW_TYPE_1D_ARRAY)
					break;
			}

			if (separateStencilUsage && !isDepthStencil)
				continue;

			de::MovePtr<tcu::TestCaseGroup>	formatGroup	(new tcu::TestCaseGroup(testCtx,
																				getFormatCaseName(format).c_str(),
																				(std::string("Samples a texture of format ") + getFormatName(format)).c_str()));

			if (!isCompressed)
			{
				// Do not include minFilter tests with compressed formats.
				// Randomly generated compressed textures are too noisy and will derive in false positives.
				de::MovePtr<tcu::TestCaseGroup>	minFilterTests			= createSamplerMinFilterTests(testCtx, viewType, format, separateStencilUsage);
				de::MovePtr<tcu::TestCaseGroup>	minReduceFilterTests	= createSamplerMinReduceFilterTests(testCtx, viewType, format, separateStencilUsage);
				formatGroup->addChild(minFilterTests.release());
				formatGroup->addChild(minReduceFilterTests.release());
			}

			de::MovePtr<tcu::TestCaseGroup>	magFilterTests			= createSamplerMagFilterTests(testCtx, viewType, format, separateStencilUsage);
			de::MovePtr<tcu::TestCaseGroup>	magReduceFilterTests	= createSamplerMagReduceFilterTests(testCtx, viewType, format, separateStencilUsage);
			de::MovePtr<tcu::TestCaseGroup>	mipmapTests				= createSamplerMipmapTests(testCtx, viewType, format, separateStencilUsage);

			formatGroup->addChild(magFilterTests.release());
			formatGroup->addChild(magReduceFilterTests.release());
			formatGroup->addChild(mipmapTests.release());

			if (viewType != VK_IMAGE_VIEW_TYPE_CUBE && viewType != VK_IMAGE_VIEW_TYPE_CUBE_ARRAY)
			{
				de::MovePtr<tcu::TestCaseGroup>	addressModesTests	= createSamplerAddressModesTests(testCtx, viewType, format, separateStencilUsage);
				formatGroup->addChild(addressModesTests.release());
			}

			formatTests->addChild(formatGroup.release());
		}

		viewTypeGroup->addChild(formatTests.release());
		viewTypeTests->addChild(viewTypeGroup.release());
	}

	return viewTypeTests.release();
}

tcu::TestCaseGroup* createSamplerTests (tcu::TestContext& testCtx)
{
	de::MovePtr<tcu::TestCaseGroup> samplerTests(new tcu::TestCaseGroup(testCtx, "sampler", "Sampler tests"));
	{
		samplerTests->addChild(createAllFormatsSamplerTests(testCtx));
	}

	// tests for VK_EXT_separate_stencil_usage
	de::MovePtr<tcu::TestCaseGroup> separateStencilUsageSamplerTests (new tcu::TestCaseGroup(testCtx, "separate_stencil_usage", "testing VK_EXT_separate_stencil_uasge"));
	{
		separateStencilUsageSamplerTests->addChild(createAllFormatsSamplerTests(testCtx, true));
		samplerTests->addChild(separateStencilUsageSamplerTests.release());
	}

	return samplerTests.release();
}

} // pipeline
} // vkt