modules/gles31/functional/es31fTextureFilteringTests.cpp - third_party/vulkan-cts - Git at Google

 /*-------------------------------------------------------------------------
  * drawElements Quality Program OpenGL ES 3.1 Module
  * -------------------------------------------------
  *
  * Copyright 2014 The Android Open Source Project
  *
  * 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 Texture filtering tests.
  *//*--------------------------------------------------------------------*/

 #include "es31fTextureFilteringTests.hpp"

 #include "glsTextureTestUtil.hpp"

 #include "gluPixelTransfer.hpp"
 #include "gluTexture.hpp"
 #include "gluTextureUtil.hpp"

 #include "tcuCommandLine.hpp"
 #include "tcuTextureUtil.hpp"
 #include "tcuImageCompare.hpp"
 #include "tcuTexLookupVerifier.hpp"
 #include "tcuVectorUtil.hpp"

 #include "deStringUtil.hpp"
 #include "deString.h"

 #include "glwFunctions.hpp"
 #include "glwEnums.hpp"

 namespace deqp
 {
 namespace gles31
 {
 namespace Functional
 {

 using std::vector;
 using std::string;
 using tcu::TestLog;
 using namespace gls::TextureTestUtil;
 using namespace glu::TextureTestUtil;

 static const char* getFaceDesc (const tcu::CubeFace face)
 {
 	switch (face)
 	{
 		case tcu::CUBEFACE_NEGATIVE_X:	return "-X";
 		case tcu::CUBEFACE_POSITIVE_X:	return "+X";
 		case tcu::CUBEFACE_NEGATIVE_Y:	return "-Y";
 		case tcu::CUBEFACE_POSITIVE_Y:	return "+Y";
 		case tcu::CUBEFACE_NEGATIVE_Z:	return "-Z";
 		case tcu::CUBEFACE_POSITIVE_Z:	return "+Z";
 		default:
 			DE_ASSERT(false);
 			return DE_NULL;
 	}
 }

 static void logCubeArrayTexCoords(TestLog& log, vector<float>& texCoord)
 {
 	const size_t numVerts = texCoord.size() / 4;

 	DE_ASSERT(texCoord.size() % 4 == 0);

 	for (size_t vertNdx = 0; vertNdx < numVerts; vertNdx++)
 	{
 		const size_t	coordNdx	= vertNdx * 4;

 		const float		u			= texCoord[coordNdx + 0];
 		const float		v			= texCoord[coordNdx + 1];
 		const float		w			= texCoord[coordNdx + 2];
 		const float		q			= texCoord[coordNdx + 3];

 		log << TestLog::Message
 			<< vertNdx << ": ("
 			<< u << ", "
 			<< v << ", "
 			<< w << ", "
 			<< q << ")"
 			<< TestLog::EndMessage;
 	}
 }

 // Cube map array filtering

 class TextureCubeArrayFilteringCase : public TestCase
 {
 public:
 									TextureCubeArrayFilteringCase	(Context& context,
 																	 const char* name,
 																	 const char* desc,
 																	 deUint32 minFilter,
 																	 deUint32 magFilter,
 																	 deUint32 wrapS,
 																	 deUint32 wrapT,
 																	 deUint32 internalFormat,
 																	 int size,
 																	 int depth,
 																	 bool onlySampleFaceInterior = false);

 									~TextureCubeArrayFilteringCase	(void);

 	void							init							(void);
 	void							deinit							(void);
 	IterateResult					iterate							(void);

 private:
 									TextureCubeArrayFilteringCase	(const TextureCubeArrayFilteringCase&);
 	TextureCubeArrayFilteringCase&	operator=						(const TextureCubeArrayFilteringCase&);

 	const deUint32					m_minFilter;
 	const deUint32					m_magFilter;
 	const deUint32					m_wrapS;
 	const deUint32					m_wrapT;

 	const deUint32					m_internalFormat;
 	const int						m_size;
 	const int						m_depth;

 	const bool						m_onlySampleFaceInterior; //!< If true, we avoid sampling anywhere near a face's edges.

 	struct FilterCase
 	{
 		const glu::TextureCubeArray*	texture;
 		tcu::Vec2						bottomLeft;
 		tcu::Vec2						topRight;
 		tcu::Vec2						layerRange;

 		FilterCase (void)
 			: texture(DE_NULL)
 		{
 		}

 		FilterCase (const glu::TextureCubeArray* tex_, const tcu::Vec2& bottomLeft_, const tcu::Vec2& topRight_, const tcu::Vec2& layerRange_)
 			: texture		(tex_)
 			, bottomLeft	(bottomLeft_)
 			, topRight		(topRight_)
 			, layerRange	(layerRange_)
 		{
 		}
 	};

 	glu::TextureCubeArray*	m_gradientTex;
 	glu::TextureCubeArray*	m_gridTex;

 	TextureRenderer			m_renderer;

 	std::vector<FilterCase>	m_cases;
 	int						m_caseNdx;
 };

 TextureCubeArrayFilteringCase::TextureCubeArrayFilteringCase (Context& context,
 															  const char* name,
 															  const char* desc,
 															  deUint32 minFilter,
 															  deUint32 magFilter,
 															  deUint32 wrapS,
 															  deUint32 wrapT,
 															  deUint32 internalFormat,
 															  int size,
 															  int depth,
 															  bool onlySampleFaceInterior)
 	: TestCase					(context, name, desc)
 	, m_minFilter				(minFilter)
 	, m_magFilter				(magFilter)
 	, m_wrapS					(wrapS)
 	, m_wrapT					(wrapT)
 	, m_internalFormat			(internalFormat)
 	, m_size					(size)
 	, m_depth					(depth)
 	, m_onlySampleFaceInterior	(onlySampleFaceInterior)
 	, m_gradientTex				(DE_NULL)
 	, m_gridTex					(DE_NULL)
 	, m_renderer				(context.getRenderContext(), context.getTestContext().getLog(), glu::GLSL_VERSION_310_ES, glu::PRECISION_HIGHP)
 	, m_caseNdx					(0)
 {
 }

 TextureCubeArrayFilteringCase::~TextureCubeArrayFilteringCase (void)
 {
 	TextureCubeArrayFilteringCase::deinit();
 }

 void TextureCubeArrayFilteringCase::init (void)
 {
 	auto		ctxType			= m_context.getRenderContext().getType();
 	const bool	isES32orGL45	= glu::contextSupports(ctxType, glu::ApiType::es(3, 2)) ||
 								  glu::contextSupports(ctxType, glu::ApiType::core(4, 5));

 	if (!isES32orGL45 && !m_context.getContextInfo().isExtensionSupported("GL_EXT_texture_cube_map_array"))
 		throw tcu::NotSupportedError("GL_EXT_texture_cube_map_array not supported");

 	if (m_internalFormat == GL_SR8_EXT && !(m_context.getContextInfo().isExtensionSupported("GL_EXT_texture_sRGB_R8")))
 		TCU_THROW(NotSupportedError, "GL_EXT_texture_sRGB_R8 not supported");

 	if (m_internalFormat == GL_SRG8_EXT && !(m_context.getContextInfo().isExtensionSupported("GL_EXT_texture_sRGB_RG8")))
 		TCU_THROW(NotSupportedError, "GL_EXT_texture_sRGB_RG8 not supported");

 	try
 	{
 		const glw::Functions&			gl			= m_context.getRenderContext().getFunctions();
 		const tcu::TextureFormat		texFmt		= glu::mapGLInternalFormat(m_internalFormat);
 		const tcu::TextureFormatInfo	fmtInfo		= tcu::getTextureFormatInfo(texFmt);
 		const tcu::Vec4					cScale		= fmtInfo.valueMax-fmtInfo.valueMin;
 		const tcu::Vec4					cBias		= fmtInfo.valueMin;
 		const int						numLevels	= deLog2Floor32(m_size) + 1;
 		const int						numLayers	= m_depth / 6;

 		if (!isContextTypeES(ctxType))
 			gl.enable(GL_TEXTURE_CUBE_MAP_SEAMLESS);

 		// Create textures.
 		m_gradientTex	= new glu::TextureCubeArray(m_context.getRenderContext(), m_internalFormat, m_size, m_depth);
 		m_gridTex		= new glu::TextureCubeArray(m_context.getRenderContext(), m_internalFormat, m_size, m_depth);

 		const tcu::IVec4 levelSwz[] =
 		{
 			tcu::IVec4(0,1,2,3),
 			tcu::IVec4(2,1,3,0),
 			tcu::IVec4(3,0,1,2),
 			tcu::IVec4(1,3,2,0),
 		};

 		// Fill first gradient texture (gradient direction varies between layers).
 		for (int levelNdx = 0; levelNdx < numLevels; levelNdx++)
 		{
 			m_gradientTex->getRefTexture().allocLevel(levelNdx);

 			const tcu::PixelBufferAccess levelBuf = m_gradientTex->getRefTexture().getLevel(levelNdx);

 			for (int layerFaceNdx = 0; layerFaceNdx < m_depth; layerFaceNdx++)
 			{
 				const tcu::IVec4	swz		= levelSwz[layerFaceNdx % DE_LENGTH_OF_ARRAY(levelSwz)];
 				const tcu::Vec4		gMin	= tcu::Vec4(0.0f, 0.0f, 0.0f, 1.0f).swizzle(swz[0],swz[1],swz[2],swz[3])*cScale + cBias;
 				const tcu::Vec4		gMax	= tcu::Vec4(1.0f, 1.0f, 1.0f, 0.0f).swizzle(swz[0],swz[1],swz[2],swz[3])*cScale + cBias;

 				tcu::fillWithComponentGradients(tcu::getSubregion(levelBuf, 0, 0, layerFaceNdx, levelBuf.getWidth(), levelBuf.getHeight(), 1), gMin, gMax);
 			}
 		}

 		// Fill second with grid texture (each layer has unique colors).
 		for (int levelNdx = 0; levelNdx < numLevels; levelNdx++)
 		{
 			m_gridTex->getRefTexture().allocLevel(levelNdx);

 			const tcu::PixelBufferAccess levelBuf = m_gridTex->getRefTexture().getLevel(levelNdx);

 			for (int layerFaceNdx = 0; layerFaceNdx < m_depth; layerFaceNdx++)
 			{
 				const deUint32	step	= 0x00ffffff / (numLevels*m_depth - 1);
 				const deUint32	rgb		= step * (levelNdx + layerFaceNdx*numLevels);
 				const deUint32	colorA	= 0xff000000 | rgb;
 				const deUint32	colorB	= 0xff000000 | ~rgb;

 				tcu::fillWithGrid(tcu::getSubregion(levelBuf, 0, 0, layerFaceNdx, levelBuf.getWidth(), levelBuf.getHeight(), 1),
 								  4, tcu::RGBA(colorA).toVec()*cScale + cBias, tcu::RGBA(colorB).toVec()*cScale + cBias);
 			}
 		}

 		// Upload.
 		m_gradientTex->upload();
 		m_gridTex->upload();

 		// Test cases
 		{
 			const glu::TextureCubeArray* const	tex0	= m_gradientTex;
 			const glu::TextureCubeArray* const	tex1	= m_gridTex;

 			if (m_onlySampleFaceInterior)
 			{
 				m_cases.push_back(FilterCase(tex0, tcu::Vec2(-0.8f, -0.8f),	tcu::Vec2(0.8f,  0.8f),	tcu::Vec2(-0.5f, float(numLayers)+0.5f)));	// minification
 				m_cases.push_back(FilterCase(tex0, tcu::Vec2(0.5f, 0.65f),	tcu::Vec2(0.8f,  0.8f),	tcu::Vec2(-0.5f, float(numLayers)+0.5f)));	// magnification
 				m_cases.push_back(FilterCase(tex1, tcu::Vec2(-0.8f, -0.8f),	tcu::Vec2(0.8f,  0.8f),	tcu::Vec2(float(numLayers)+0.5f, -0.5f)));	// minification
 				m_cases.push_back(FilterCase(tex1, tcu::Vec2(0.2f, 0.2f),	tcu::Vec2(0.6f,  0.5f),	tcu::Vec2(float(numLayers)+0.5f, -0.5f)));	// magnification
 			}
 			else
 			{
 				const bool isSingleSample = (m_context.getRenderTarget().getNumSamples() == 0);

 				// minification - w/ tweak to avoid hitting triangle edges with a face switchpoint in multisample configs
 				if (isSingleSample)
 					m_cases.push_back(FilterCase(tex0, tcu::Vec2(-1.25f, -1.2f), tcu::Vec2(1.2f, 1.25f), tcu::Vec2(-0.5f, float(numLayers)+0.5f)));
 				else
 					m_cases.push_back(FilterCase(tex0, tcu::Vec2(-1.19f, -1.3f), tcu::Vec2(1.1f, 1.35f), tcu::Vec2(-0.5f, float(numLayers)+0.5f)));

 				m_cases.push_back(FilterCase(tex0, tcu::Vec2(0.8f, 0.8f),		tcu::Vec2(1.25f, 1.20f),	tcu::Vec2(-0.5f, float(numLayers)+0.5f)));	// magnification
 				m_cases.push_back(FilterCase(tex1, tcu::Vec2(-1.19f, -1.3f),	tcu::Vec2(1.1f, 1.35f),		tcu::Vec2(float(numLayers)+0.5f, -0.5f)));	// minification
 				m_cases.push_back(FilterCase(tex1, tcu::Vec2(-1.2f, -1.1f),		tcu::Vec2(-0.8f, -0.8f),	tcu::Vec2(float(numLayers)+0.5f, -0.5f)));	// magnification

 				// Layer rounding - only in single-sample configs as multisample configs may produce smooth transition at the middle.
 				if (isSingleSample && (numLayers > 1))
 					m_cases.push_back(FilterCase(tex0,	tcu::Vec2(-2.0f, -1.5f  ),	tcu::Vec2(-0.1f,  0.9f), tcu::Vec2(1.50001f, 1.49999f)));
 			}
 		}

 		m_caseNdx = 0;
 		m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
 	}
 	catch (...)
 	{
 		// Clean up to save memory.
 		TextureCubeArrayFilteringCase::deinit();
 		throw;
 	}
 }

 void TextureCubeArrayFilteringCase::deinit (void)
 {
 	delete m_gradientTex;
 	delete m_gridTex;

 	m_gradientTex	= DE_NULL;
 	m_gridTex		= DE_NULL;

 	m_renderer.clear();
 	m_cases.clear();

 	if (!isContextTypeES(m_context.getRenderContext().getType()))
 		m_context.getRenderContext().getFunctions().disable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
 }

 TextureCubeArrayFilteringCase::IterateResult TextureCubeArrayFilteringCase::iterate (void)
 {
 	TestLog&						log				= m_testCtx.getLog();
 	const glu::RenderContext&		renderCtx		= m_context.getRenderContext();
 	const glw::Functions&			gl				= renderCtx.getFunctions();
 	const int						viewportSize	= 28;
 	const deUint32					randomSeed		= deStringHash(getName()) ^ deInt32Hash(m_caseNdx) ^ m_testCtx.getCommandLine().getBaseSeed();
 	const RandomViewport			viewport		(m_context.getRenderTarget(), viewportSize, viewportSize, randomSeed);
 	const FilterCase&				curCase			= m_cases[m_caseNdx];
 	const tcu::TextureFormat		texFmt			= curCase.texture->getRefTexture().getFormat();
 	const tcu::TextureFormatInfo	fmtInfo			= tcu::getTextureFormatInfo(texFmt);
 	const tcu::ScopedLogSection		section			(m_testCtx.getLog(), string("Test") + de::toString(m_caseNdx), string("Test ") + de::toString(m_caseNdx));
 	ReferenceParams					refParams		(TEXTURETYPE_CUBE_ARRAY);

 	if (viewport.width < viewportSize || viewport.height < viewportSize)
 		throw tcu::NotSupportedError("Render target too small", "", __FILE__, __LINE__);

 	// Params for reference computation.
 	refParams.sampler					= glu::mapGLSampler(GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE, m_minFilter, m_magFilter);
 	refParams.sampler.seamlessCubeMap	= true;
 	refParams.samplerType				= getSamplerType(texFmt);
 	refParams.colorBias					= fmtInfo.lookupBias;
 	refParams.colorScale				= fmtInfo.lookupScale;
 	refParams.lodMode					= LODMODE_EXACT;

 	gl.bindTexture	(GL_TEXTURE_CUBE_MAP_ARRAY, curCase.texture->getGLTexture());
 	gl.texParameteri(GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_MIN_FILTER,	m_minFilter);
 	gl.texParameteri(GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_MAG_FILTER,	m_magFilter);
 	gl.texParameteri(GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_WRAP_S,		m_wrapS);
 	gl.texParameteri(GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_WRAP_T,		m_wrapT);

 	gl.viewport(viewport.x, viewport.y, viewport.width, viewport.height);

 	m_testCtx.getLog() << TestLog::Message << "Coordinates: " << curCase.bottomLeft << " -> " << curCase.topRight << TestLog::EndMessage;

 	for (int faceNdx = 0; faceNdx < tcu::CUBEFACE_LAST; faceNdx++)
 	{
 		const tcu::CubeFace		face		= tcu::CubeFace(faceNdx);
 		tcu::Surface			result		(viewport.width, viewport.height);
 		vector<float>			texCoord;

 		computeQuadTexCoordCubeArray(texCoord, face, curCase.bottomLeft, curCase.topRight, curCase.layerRange);

 		log << TestLog::Message << "Face " << getFaceDesc(face) << TestLog::EndMessage;

 		log << TestLog::Message << "Texture coordinates:" << TestLog::EndMessage;

 		logCubeArrayTexCoords(log, texCoord);

 		m_renderer.renderQuad(0, &texCoord[0], refParams);
 		GLU_EXPECT_NO_ERROR(gl.getError(), "Draw");

 		glu::readPixels(renderCtx, viewport.x, viewport.y, result.getAccess());
 		GLU_EXPECT_NO_ERROR(gl.getError(), "Read pixels");

 		{
 			const bool				isNearestOnly	= m_minFilter == GL_NEAREST && m_magFilter == GL_NEAREST;
 			const tcu::PixelFormat	pixelFormat		= renderCtx.getRenderTarget().getPixelFormat();
 			const tcu::IVec4		coordBits		= tcu::IVec4(10);
 			const tcu::IVec4		colorBits		= max(getBitsVec(pixelFormat) - (isNearestOnly ? 1 : 2), tcu::IVec4(0)); // 1 inaccurate bit if nearest only, 2 otherwise
 			tcu::LodPrecision		lodPrecision;
 			tcu::LookupPrecision	lookupPrecision;

 			lodPrecision.derivateBits		= 10;
 			lodPrecision.lodBits			= 5;
 			lookupPrecision.colorThreshold	= tcu::computeFixedPointThreshold(colorBits) / refParams.colorScale;
 			lookupPrecision.coordBits		= coordBits.toWidth<3>();
 			lookupPrecision.uvwBits			= tcu::IVec3(6);
 			lookupPrecision.colorMask		= getCompareMask(pixelFormat);

 			const bool isHighQuality = verifyTextureResult(m_testCtx, result.getAccess(), curCase.texture->getRefTexture(),
 														   &texCoord[0], refParams, lookupPrecision, coordBits, lodPrecision, pixelFormat);

 			if (!isHighQuality)
 			{
 				// Evaluate against lower precision requirements.
 				lodPrecision.lodBits	= 4;
 				lookupPrecision.uvwBits	= tcu::IVec3(4);

 				m_testCtx.getLog() << TestLog::Message << "Warning: Verification against high precision requirements failed, trying with lower requirements." << TestLog::EndMessage;

 				const bool isOk = verifyTextureResult(m_testCtx, result.getAccess(), curCase.texture->getRefTexture(),
 													  &texCoord[0], refParams, lookupPrecision, coordBits, lodPrecision, pixelFormat);

 				if (!isOk)
 				{
 					m_testCtx.getLog() << TestLog::Message << "ERROR: Verification against low precision requirements failed, failing test case." << TestLog::EndMessage;
 					m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Image verification failed");
 				}
 				else if (m_testCtx.getTestResult() == QP_TEST_RESULT_PASS)
 					m_testCtx.setTestResult(QP_TEST_RESULT_QUALITY_WARNING, "Low-quality filtering result");
 			}
 		}
 	}

 	m_caseNdx += 1;
 	return m_caseNdx < (int)m_cases.size() ? CONTINUE : STOP;
 }

 TextureFilteringTests::TextureFilteringTests (Context& context)
 	: TestCaseGroup(context, "filtering", "Texture Filtering Tests")
 {
 }

 TextureFilteringTests::~TextureFilteringTests (void)
 {
 }

 void TextureFilteringTests::init (void)
 {
 	static const struct
 	{
 		const char*		name;
 		deUint32		mode;
 	} wrapModes[] =
 	{
 		{ "clamp",		GL_CLAMP_TO_EDGE },
 		{ "repeat",		GL_REPEAT },
 		{ "mirror",		GL_MIRRORED_REPEAT }
 	};

 	static const struct
 	{
 		const char*		name;
 		deUint32		mode;
 	} minFilterModes[] =
 	{
 		{ "nearest",				GL_NEAREST					},
 		{ "linear",					GL_LINEAR					},
 		{ "nearest_mipmap_nearest",	GL_NEAREST_MIPMAP_NEAREST	},
 		{ "linear_mipmap_nearest",	GL_LINEAR_MIPMAP_NEAREST	},
 		{ "nearest_mipmap_linear",	GL_NEAREST_MIPMAP_LINEAR	},
 		{ "linear_mipmap_linear",	GL_LINEAR_MIPMAP_LINEAR		}
 	};

 	static const struct
 	{
 		const char*		name;
 		deUint32		mode;
 	} magFilterModes[] =
 	{
 		{ "nearest",	GL_NEAREST },
 		{ "linear",		GL_LINEAR }
 	};

 	static const struct
 	{
 		int size;
 		int depth;
 	} sizesCubeArray[] =
 	{
 		{   8,	 6 },
 		{  64,	12 },
 		{ 128,	12 },
 		{   7,	12 },
 		{  63,	18 }
 	};

 	static const struct
 	{
 		const char*		name;
 		deUint32		format;
 	} filterableFormatsByType[] =
 	{
 		{ "rgba16f",		GL_RGBA16F			},
 		{ "r11f_g11f_b10f",	GL_R11F_G11F_B10F	},
 		{ "rgb9_e5",		GL_RGB9_E5			},
 		{ "rgba8",			GL_RGBA8			},
 		{ "rgba8_snorm",	GL_RGBA8_SNORM		},
 		{ "rgb565",			GL_RGB565			},
 		{ "rgba4",			GL_RGBA4			},
 		{ "rgb5_a1",		GL_RGB5_A1			},
 		{ "sr8",			GL_SR8_EXT			},
 		{ "srg8",			GL_SRG8_EXT			},
 		{ "srgb8_alpha8",	GL_SRGB8_ALPHA8		},
 		{ "rgb10_a2",		GL_RGB10_A2			}
 	};

 	// Cube map array texture filtering.
 	{
 		tcu::TestCaseGroup* const groupCubeArray = new tcu::TestCaseGroup(m_testCtx, "cube_array", "Cube Map Array Texture Filtering");
 		addChild(groupCubeArray);

 		// Formats.
 		{
 			tcu::TestCaseGroup* const formatsGroup = new tcu::TestCaseGroup(m_testCtx, "formats", "Cube Map Array Texture Formats");
 			groupCubeArray->addChild(formatsGroup);

 			for (int fmtNdx = 0; fmtNdx < DE_LENGTH_OF_ARRAY(filterableFormatsByType); fmtNdx++)
 			{
 				for (int filterNdx = 0; filterNdx < DE_LENGTH_OF_ARRAY(minFilterModes); filterNdx++)
 				{
 					const deUint32	minFilter	= minFilterModes[filterNdx].mode;
 					const char*		filterName	= minFilterModes[filterNdx].name;
 					const deUint32	format		= filterableFormatsByType[fmtNdx].format;
 					const char*		formatName	= filterableFormatsByType[fmtNdx].name;
 					const bool		isMipmap	= minFilter != GL_NEAREST && minFilter != GL_LINEAR;
 					const deUint32	magFilter	= isMipmap ? GL_LINEAR : minFilter;
 					const string	name		= string(formatName) + "_" + filterName;
 					const deUint32	wrapS		= GL_REPEAT;
 					const deUint32	wrapT		= GL_REPEAT;
 					const int		size		= 64;
 					const int		depth		= 12;

 					formatsGroup->addChild(new TextureCubeArrayFilteringCase(m_context,
 																			 name.c_str(), "",
 																			 minFilter, magFilter,
 																			 wrapS, wrapT,
 																			 format,
 																			 size, depth));
 				}
 			}
 		}

 		// Sizes.
 		{
 			tcu::TestCaseGroup* const sizesGroup = new tcu::TestCaseGroup(m_testCtx, "sizes", "Texture Sizes");
 			groupCubeArray->addChild(sizesGroup);

 			for (int sizeNdx = 0; sizeNdx < DE_LENGTH_OF_ARRAY(sizesCubeArray); sizeNdx++)
 			{
 				for (int filterNdx = 0; filterNdx < DE_LENGTH_OF_ARRAY(minFilterModes); filterNdx++)
 				{
 					const deUint32	minFilter	= minFilterModes[filterNdx].mode;
 					const char*		filterName	= minFilterModes[filterNdx].name;
 					const deUint32	format		= GL_RGBA8;
 					const bool		isMipmap	= minFilter != GL_NEAREST && minFilter != GL_LINEAR;
 					const deUint32	magFilter	= isMipmap ? GL_LINEAR : minFilter;
 					const deUint32	wrapS		= GL_REPEAT;
 					const deUint32	wrapT		= GL_REPEAT;
 					const int		size		= sizesCubeArray[sizeNdx].size;
 					const int		depth		= sizesCubeArray[sizeNdx].depth;
 					const string	name		= de::toString(size) + "x" + de::toString(size) + "x" + de::toString(depth) + "_" + filterName;

 					sizesGroup->addChild(new TextureCubeArrayFilteringCase(m_context,
 																		   name.c_str(), "",
 																		   minFilter, magFilter,
 																		   wrapS, wrapT,
 																		   format,
 																		   size, depth));
 				}
 			}
 		}

 		// Wrap modes.
 		{
 			tcu::TestCaseGroup* const combinationsGroup = new tcu::TestCaseGroup(m_testCtx, "combinations", "Filter and wrap mode combinations");
 			groupCubeArray->addChild(combinationsGroup);

 			for (int minFilterNdx = 0; minFilterNdx < DE_LENGTH_OF_ARRAY(minFilterModes); minFilterNdx++)
 			{
 				for (int magFilterNdx = 0; magFilterNdx < DE_LENGTH_OF_ARRAY(magFilterModes); magFilterNdx++)
 				{
 					for (int wrapSNdx = 0; wrapSNdx < DE_LENGTH_OF_ARRAY(wrapModes); wrapSNdx++)
 					{
 						for (int wrapTNdx = 0; wrapTNdx < DE_LENGTH_OF_ARRAY(wrapModes); wrapTNdx++)
 						{
 							const deUint32	minFilter	= minFilterModes[minFilterNdx].mode;
 							const deUint32	magFilter	= magFilterModes[magFilterNdx].mode;
 							const deUint32	format		= GL_RGBA8;
 							const deUint32	wrapS		= wrapModes[wrapSNdx].mode;
 							const deUint32	wrapT		= wrapModes[wrapTNdx].mode;
 							const int		size		= 63;
 							const int		depth		= 12;
 							const string	name		= string(minFilterModes[minFilterNdx].name) + "_" + magFilterModes[magFilterNdx].name + "_" + wrapModes[wrapSNdx].name + "_" + wrapModes[wrapTNdx].name;

 							combinationsGroup->addChild(new TextureCubeArrayFilteringCase(m_context,
 																						  name.c_str(), "",
 																						  minFilter, magFilter,
 																						  wrapS, wrapT,
 																						  format,
 																						  size, depth));
 						}
 					}
 				}
 			}
 		}

 		// Cases with no visible cube edges.
 		{
 			tcu::TestCaseGroup* const onlyFaceInteriorGroup = new tcu::TestCaseGroup(m_testCtx, "no_edges_visible", "Don't sample anywhere near a face's edges");
 			groupCubeArray->addChild(onlyFaceInteriorGroup);

 			for (int isLinearI = 0; isLinearI <= 1; isLinearI++)
 			{
 				const bool		isLinear	= isLinearI != 0;
 				const deUint32	filter		= isLinear ? GL_LINEAR : GL_NEAREST;

 				onlyFaceInteriorGroup->addChild(new TextureCubeArrayFilteringCase(m_context,
 																				  isLinear ? "linear" : "nearest", "",
 																				  filter, filter,
 																				  GL_REPEAT, GL_REPEAT,
 																				  GL_RGBA8,
 																				  63, 12,
 																				  true));
 			}
 		}
 	}
 }

 } // Functional
 } // gles31
 } // deqp
	/*-------------------------------------------------------------------------
	* drawElements Quality Program OpenGL ES 3.1 Module
	* -------------------------------------------------
	*
	* Copyright 2014 The Android Open Source Project
	*
	* 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 Texture filtering tests.
	//--------------------------------------------------------------------*/

	#include "es31fTextureFilteringTests.hpp"

	#include "glsTextureTestUtil.hpp"

	#include "gluPixelTransfer.hpp"
	#include "gluTexture.hpp"
	#include "gluTextureUtil.hpp"

	#include "tcuCommandLine.hpp"
	#include "tcuTextureUtil.hpp"
	#include "tcuImageCompare.hpp"
	#include "tcuTexLookupVerifier.hpp"
	#include "tcuVectorUtil.hpp"

	#include "deStringUtil.hpp"
	#include "deString.h"

	#include "glwFunctions.hpp"
	#include "glwEnums.hpp"

	namespace deqp
	{
	namespace gles31
	{
	namespace Functional
	{

	using std::vector;
	using std::string;
	using tcu::TestLog;
	using namespace gls::TextureTestUtil;
	using namespace glu::TextureTestUtil;

	static const char* getFaceDesc (const tcu::CubeFace face)
	{
	switch (face)
	{
	case tcu::CUBEFACE_NEGATIVE_X: return "-X";
	case tcu::CUBEFACE_POSITIVE_X: return "+X";
	case tcu::CUBEFACE_NEGATIVE_Y: return "-Y";
	case tcu::CUBEFACE_POSITIVE_Y: return "+Y";
	case tcu::CUBEFACE_NEGATIVE_Z: return "-Z";
	case tcu::CUBEFACE_POSITIVE_Z: return "+Z";
	default:
	DE_ASSERT(false);
	return DE_NULL;
	}
	}

	static void logCubeArrayTexCoords(TestLog& log, vector<float>& texCoord)
	{
	const size_t numVerts = texCoord.size() / 4;

	DE_ASSERT(texCoord.size() % 4 == 0);

	for (size_t vertNdx = 0; vertNdx < numVerts; vertNdx++)
	{
	const size_t coordNdx = vertNdx * 4;

	const float u = texCoord[coordNdx + 0];
	const float v = texCoord[coordNdx + 1];
	const float w = texCoord[coordNdx + 2];
	const float q = texCoord[coordNdx + 3];

	log << TestLog::Message
	<< vertNdx << ": ("
	<< u << ", "
	<< v << ", "
	<< w << ", "
	<< q << ")"
	<< TestLog::EndMessage;
	}
	}

	// Cube map array filtering

	class TextureCubeArrayFilteringCase : public TestCase
	{
	public:
	TextureCubeArrayFilteringCase (Context& context,
	const char* name,
	const char* desc,
	deUint32 minFilter,
	deUint32 magFilter,
	deUint32 wrapS,
	deUint32 wrapT,
	deUint32 internalFormat,
	int size,
	int depth,
	bool onlySampleFaceInterior = false);

	~TextureCubeArrayFilteringCase (void);

	void init (void);
	void deinit (void);
	IterateResult iterate (void);

	private:
	TextureCubeArrayFilteringCase (const TextureCubeArrayFilteringCase&);
	TextureCubeArrayFilteringCase& operator= (const TextureCubeArrayFilteringCase&);

	const deUint32 m_minFilter;
	const deUint32 m_magFilter;
	const deUint32 m_wrapS;
	const deUint32 m_wrapT;

	const deUint32 m_internalFormat;
	const int m_size;
	const int m_depth;

	const bool m_onlySampleFaceInterior; //!< If true, we avoid sampling anywhere near a face's edges.

	struct FilterCase
	{
	const glu::TextureCubeArray* texture;
	tcu::Vec2 bottomLeft;
	tcu::Vec2 topRight;
	tcu::Vec2 layerRange;

	FilterCase (void)
	: texture(DE_NULL)
	{
	}

	FilterCase (const glu::TextureCubeArray* tex_, const tcu::Vec2& bottomLeft_, const tcu::Vec2& topRight_, const tcu::Vec2& layerRange_)
	: texture (tex_)
	, bottomLeft (bottomLeft_)
	, topRight (topRight_)
	, layerRange (layerRange_)
	{
	}
	};

	glu::TextureCubeArray* m_gradientTex;
	glu::TextureCubeArray* m_gridTex;

	TextureRenderer m_renderer;

	std::vector<FilterCase> m_cases;
	int m_caseNdx;
	};

	TextureCubeArrayFilteringCase::TextureCubeArrayFilteringCase (Context& context,
	const char* name,
	const char* desc,
	deUint32 minFilter,
	deUint32 magFilter,
	deUint32 wrapS,
	deUint32 wrapT,
	deUint32 internalFormat,
	int size,
	int depth,
	bool onlySampleFaceInterior)
	: TestCase (context, name, desc)
	, m_minFilter (minFilter)
	, m_magFilter (magFilter)
	, m_wrapS (wrapS)
	, m_wrapT (wrapT)
	, m_internalFormat (internalFormat)
	, m_size (size)
	, m_depth (depth)
	, m_onlySampleFaceInterior (onlySampleFaceInterior)
	, m_gradientTex (DE_NULL)
	, m_gridTex (DE_NULL)
	, m_renderer (context.getRenderContext(), context.getTestContext().getLog(), glu::GLSL_VERSION_310_ES, glu::PRECISION_HIGHP)
	, m_caseNdx (0)
	{
	}

	TextureCubeArrayFilteringCase::~TextureCubeArrayFilteringCase (void)
	{
	TextureCubeArrayFilteringCase::deinit();
	}

	void TextureCubeArrayFilteringCase::init (void)
	{
	auto ctxType = m_context.getRenderContext().getType();
	const bool isES32orGL45 = glu::contextSupports(ctxType, glu::ApiType::es(3, 2)) \|\|
	glu::contextSupports(ctxType, glu::ApiType::core(4, 5));

	if (!isES32orGL45 && !m_context.getContextInfo().isExtensionSupported("GL_EXT_texture_cube_map_array"))
	throw tcu::NotSupportedError("GL_EXT_texture_cube_map_array not supported");

	if (m_internalFormat == GL_SR8_EXT && !(m_context.getContextInfo().isExtensionSupported("GL_EXT_texture_sRGB_R8")))
	TCU_THROW(NotSupportedError, "GL_EXT_texture_sRGB_R8 not supported");

	if (m_internalFormat == GL_SRG8_EXT && !(m_context.getContextInfo().isExtensionSupported("GL_EXT_texture_sRGB_RG8")))
	TCU_THROW(NotSupportedError, "GL_EXT_texture_sRGB_RG8 not supported");

	try
	{
	const glw::Functions& gl = m_context.getRenderContext().getFunctions();
	const tcu::TextureFormat texFmt = glu::mapGLInternalFormat(m_internalFormat);
	const tcu::TextureFormatInfo fmtInfo = tcu::getTextureFormatInfo(texFmt);
	const tcu::Vec4 cScale = fmtInfo.valueMax-fmtInfo.valueMin;
	const tcu::Vec4 cBias = fmtInfo.valueMin;
	const int numLevels = deLog2Floor32(m_size) + 1;
	const int numLayers = m_depth / 6;

	if (!isContextTypeES(ctxType))
	gl.enable(GL_TEXTURE_CUBE_MAP_SEAMLESS);

	// Create textures.
	m_gradientTex = new glu::TextureCubeArray(m_context.getRenderContext(), m_internalFormat, m_size, m_depth);
	m_gridTex = new glu::TextureCubeArray(m_context.getRenderContext(), m_internalFormat, m_size, m_depth);

	const tcu::IVec4 levelSwz[] =
	{
	tcu::IVec4(0,1,2,3),
	tcu::IVec4(2,1,3,0),
	tcu::IVec4(3,0,1,2),
	tcu::IVec4(1,3,2,0),
	};

	// Fill first gradient texture (gradient direction varies between layers).
	for (int levelNdx = 0; levelNdx < numLevels; levelNdx++)
	{
	m_gradientTex->getRefTexture().allocLevel(levelNdx);

	const tcu::PixelBufferAccess levelBuf = m_gradientTex->getRefTexture().getLevel(levelNdx);

	for (int layerFaceNdx = 0; layerFaceNdx < m_depth; layerFaceNdx++)
	{
	const tcu::IVec4 swz = levelSwz[layerFaceNdx % DE_LENGTH_OF_ARRAY(levelSwz)];
	const tcu::Vec4 gMin = tcu::Vec4(0.0f, 0.0f, 0.0f, 1.0f).swizzle(swz[0],swz[1],swz[2],swz[3])*cScale + cBias;
	const tcu::Vec4 gMax = tcu::Vec4(1.0f, 1.0f, 1.0f, 0.0f).swizzle(swz[0],swz[1],swz[2],swz[3])*cScale + cBias;

	tcu::fillWithComponentGradients(tcu::getSubregion(levelBuf, 0, 0, layerFaceNdx, levelBuf.getWidth(), levelBuf.getHeight(), 1), gMin, gMax);
	}
	}

	// Fill second with grid texture (each layer has unique colors).
	for (int levelNdx = 0; levelNdx < numLevels; levelNdx++)
	{
	m_gridTex->getRefTexture().allocLevel(levelNdx);

	const tcu::PixelBufferAccess levelBuf = m_gridTex->getRefTexture().getLevel(levelNdx);

	for (int layerFaceNdx = 0; layerFaceNdx < m_depth; layerFaceNdx++)
	{
	const deUint32 step = 0x00ffffff / (numLevels*m_depth - 1);
	const deUint32 rgb = step * (levelNdx + layerFaceNdx*numLevels);
	const deUint32 colorA = 0xff000000 \| rgb;
	const deUint32 colorB = 0xff000000 \| ~rgb;

	tcu::fillWithGrid(tcu::getSubregion(levelBuf, 0, 0, layerFaceNdx, levelBuf.getWidth(), levelBuf.getHeight(), 1),
	4, tcu::RGBA(colorA).toVec()cScale + cBias, tcu::RGBA(colorB).toVec()cScale + cBias);
	}
	}

	// Upload.
	m_gradientTex->upload();
	m_gridTex->upload();

	// Test cases
	{
	const glu::TextureCubeArray* const tex0 = m_gradientTex;
	const glu::TextureCubeArray* const tex1 = m_gridTex;

	if (m_onlySampleFaceInterior)
	{
	m_cases.push_back(FilterCase(tex0, tcu::Vec2(-0.8f, -0.8f), tcu::Vec2(0.8f, 0.8f), tcu::Vec2(-0.5f, float(numLayers)+0.5f))); // minification
	m_cases.push_back(FilterCase(tex0, tcu::Vec2(0.5f, 0.65f), tcu::Vec2(0.8f, 0.8f), tcu::Vec2(-0.5f, float(numLayers)+0.5f))); // magnification
	m_cases.push_back(FilterCase(tex1, tcu::Vec2(-0.8f, -0.8f), tcu::Vec2(0.8f, 0.8f), tcu::Vec2(float(numLayers)+0.5f, -0.5f))); // minification
	m_cases.push_back(FilterCase(tex1, tcu::Vec2(0.2f, 0.2f), tcu::Vec2(0.6f, 0.5f), tcu::Vec2(float(numLayers)+0.5f, -0.5f))); // magnification
	}
	else
	{
	const bool isSingleSample = (m_context.getRenderTarget().getNumSamples() == 0);

	// minification - w/ tweak to avoid hitting triangle edges with a face switchpoint in multisample configs
	if (isSingleSample)
	m_cases.push_back(FilterCase(tex0, tcu::Vec2(-1.25f, -1.2f), tcu::Vec2(1.2f, 1.25f), tcu::Vec2(-0.5f, float(numLayers)+0.5f)));
	else
	m_cases.push_back(FilterCase(tex0, tcu::Vec2(-1.19f, -1.3f), tcu::Vec2(1.1f, 1.35f), tcu::Vec2(-0.5f, float(numLayers)+0.5f)));

	m_cases.push_back(FilterCase(tex0, tcu::Vec2(0.8f, 0.8f), tcu::Vec2(1.25f, 1.20f), tcu::Vec2(-0.5f, float(numLayers)+0.5f))); // magnification
	m_cases.push_back(FilterCase(tex1, tcu::Vec2(-1.19f, -1.3f), tcu::Vec2(1.1f, 1.35f), tcu::Vec2(float(numLayers)+0.5f, -0.5f))); // minification
	m_cases.push_back(FilterCase(tex1, tcu::Vec2(-1.2f, -1.1f), tcu::Vec2(-0.8f, -0.8f), tcu::Vec2(float(numLayers)+0.5f, -0.5f))); // magnification

	// Layer rounding - only in single-sample configs as multisample configs may produce smooth transition at the middle.
	if (isSingleSample && (numLayers > 1))
	m_cases.push_back(FilterCase(tex0, tcu::Vec2(-2.0f, -1.5f ), tcu::Vec2(-0.1f, 0.9f), tcu::Vec2(1.50001f, 1.49999f)));
	}
	}

	m_caseNdx = 0;
	m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
	}
	catch (...)
	{
	// Clean up to save memory.
	TextureCubeArrayFilteringCase::deinit();
	throw;
	}
	}

	void TextureCubeArrayFilteringCase::deinit (void)
	{
	delete m_gradientTex;
	delete m_gridTex;

	m_gradientTex = DE_NULL;
	m_gridTex = DE_NULL;

	m_renderer.clear();
	m_cases.clear();

	if (!isContextTypeES(m_context.getRenderContext().getType()))
	m_context.getRenderContext().getFunctions().disable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
	}

	TextureCubeArrayFilteringCase::IterateResult TextureCubeArrayFilteringCase::iterate (void)
	{
	TestLog& log = m_testCtx.getLog();
	const glu::RenderContext& renderCtx = m_context.getRenderContext();
	const glw::Functions& gl = renderCtx.getFunctions();
	const int viewportSize = 28;
	const deUint32 randomSeed = deStringHash(getName()) ^ deInt32Hash(m_caseNdx) ^ m_testCtx.getCommandLine().getBaseSeed();
	const RandomViewport viewport (m_context.getRenderTarget(), viewportSize, viewportSize, randomSeed);
	const FilterCase& curCase = m_cases[m_caseNdx];
	const tcu::TextureFormat texFmt = curCase.texture->getRefTexture().getFormat();
	const tcu::TextureFormatInfo fmtInfo = tcu::getTextureFormatInfo(texFmt);
	const tcu::ScopedLogSection section (m_testCtx.getLog(), string("Test") + de::toString(m_caseNdx), string("Test ") + de::toString(m_caseNdx));
	ReferenceParams refParams (TEXTURETYPE_CUBE_ARRAY);

	if (viewport.width < viewportSize \|\| viewport.height < viewportSize)
	throw tcu::NotSupportedError("Render target too small", "", __FILE__, __LINE__);

	// Params for reference computation.
	refParams.sampler = glu::mapGLSampler(GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE, m_minFilter, m_magFilter);
	refParams.sampler.seamlessCubeMap = true;
	refParams.samplerType = getSamplerType(texFmt);
	refParams.colorBias = fmtInfo.lookupBias;
	refParams.colorScale = fmtInfo.lookupScale;
	refParams.lodMode = LODMODE_EXACT;

	gl.bindTexture (GL_TEXTURE_CUBE_MAP_ARRAY, curCase.texture->getGLTexture());
	gl.texParameteri(GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_MIN_FILTER, m_minFilter);
	gl.texParameteri(GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_MAG_FILTER, m_magFilter);
	gl.texParameteri(GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_WRAP_S, m_wrapS);
	gl.texParameteri(GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_WRAP_T, m_wrapT);

	gl.viewport(viewport.x, viewport.y, viewport.width, viewport.height);

	m_testCtx.getLog() << TestLog::Message << "Coordinates: " << curCase.bottomLeft << " -> " << curCase.topRight << TestLog::EndMessage;

	for (int faceNdx = 0; faceNdx < tcu::CUBEFACE_LAST; faceNdx++)
	{
	const tcu::CubeFace face = tcu::CubeFace(faceNdx);
	tcu::Surface result (viewport.width, viewport.height);
	vector<float> texCoord;

	computeQuadTexCoordCubeArray(texCoord, face, curCase.bottomLeft, curCase.topRight, curCase.layerRange);

	log << TestLog::Message << "Face " << getFaceDesc(face) << TestLog::EndMessage;

	log << TestLog::Message << "Texture coordinates:" << TestLog::EndMessage;

	logCubeArrayTexCoords(log, texCoord);

	m_renderer.renderQuad(0, &texCoord[0], refParams);
	GLU_EXPECT_NO_ERROR(gl.getError(), "Draw");

	glu::readPixels(renderCtx, viewport.x, viewport.y, result.getAccess());
	GLU_EXPECT_NO_ERROR(gl.getError(), "Read pixels");

	{
	const bool isNearestOnly = m_minFilter == GL_NEAREST && m_magFilter == GL_NEAREST;
	const tcu::PixelFormat pixelFormat = renderCtx.getRenderTarget().getPixelFormat();
	const tcu::IVec4 coordBits = tcu::IVec4(10);
	const tcu::IVec4 colorBits = max(getBitsVec(pixelFormat) - (isNearestOnly ? 1 : 2), tcu::IVec4(0)); // 1 inaccurate bit if nearest only, 2 otherwise
	tcu::LodPrecision lodPrecision;
	tcu::LookupPrecision lookupPrecision;

	lodPrecision.derivateBits = 10;
	lodPrecision.lodBits = 5;
	lookupPrecision.colorThreshold = tcu::computeFixedPointThreshold(colorBits) / refParams.colorScale;
	lookupPrecision.coordBits = coordBits.toWidth<3>();
	lookupPrecision.uvwBits = tcu::IVec3(6);
	lookupPrecision.colorMask = getCompareMask(pixelFormat);

	const bool isHighQuality = verifyTextureResult(m_testCtx, result.getAccess(), curCase.texture->getRefTexture(),
	&texCoord[0], refParams, lookupPrecision, coordBits, lodPrecision, pixelFormat);

	if (!isHighQuality)
	{
	// Evaluate against lower precision requirements.
	lodPrecision.lodBits = 4;
	lookupPrecision.uvwBits = tcu::IVec3(4);

	m_testCtx.getLog() << TestLog::Message << "Warning: Verification against high precision requirements failed, trying with lower requirements." << TestLog::EndMessage;

	const bool isOk = verifyTextureResult(m_testCtx, result.getAccess(), curCase.texture->getRefTexture(),
	&texCoord[0], refParams, lookupPrecision, coordBits, lodPrecision, pixelFormat);

	if (!isOk)
	{
	m_testCtx.getLog() << TestLog::Message << "ERROR: Verification against low precision requirements failed, failing test case." << TestLog::EndMessage;
	m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Image verification failed");
	}
	else if (m_testCtx.getTestResult() == QP_TEST_RESULT_PASS)
	m_testCtx.setTestResult(QP_TEST_RESULT_QUALITY_WARNING, "Low-quality filtering result");
	}
	}
	}

	m_caseNdx += 1;
	return m_caseNdx < (int)m_cases.size() ? CONTINUE : STOP;
	}

	TextureFilteringTests::TextureFilteringTests (Context& context)
	: TestCaseGroup(context, "filtering", "Texture Filtering Tests")
	{
	}

	TextureFilteringTests::~TextureFilteringTests (void)
	{
	}

	void TextureFilteringTests::init (void)
	{
	static const struct
	{
	const char* name;
	deUint32 mode;
	} wrapModes[] =
	{
	{ "clamp", GL_CLAMP_TO_EDGE },
	{ "repeat", GL_REPEAT },
	{ "mirror", GL_MIRRORED_REPEAT }
	};

	static const struct
	{
	const char* name;
	deUint32 mode;
	} minFilterModes[] =
	{
	{ "nearest", GL_NEAREST },
	{ "linear", GL_LINEAR },
	{ "nearest_mipmap_nearest", GL_NEAREST_MIPMAP_NEAREST },
	{ "linear_mipmap_nearest", GL_LINEAR_MIPMAP_NEAREST },
	{ "nearest_mipmap_linear", GL_NEAREST_MIPMAP_LINEAR },
	{ "linear_mipmap_linear", GL_LINEAR_MIPMAP_LINEAR }
	};

	static const struct
	{
	const char* name;
	deUint32 mode;
	} magFilterModes[] =
	{
	{ "nearest", GL_NEAREST },
	{ "linear", GL_LINEAR }
	};

	static const struct
	{
	int size;
	int depth;
	} sizesCubeArray[] =
	{
	{ 8, 6 },
	{ 64, 12 },
	{ 128, 12 },
	{ 7, 12 },
	{ 63, 18 }
	};

	static const struct
	{
	const char* name;
	deUint32 format;
	} filterableFormatsByType[] =
	{
	{ "rgba16f", GL_RGBA16F },
	{ "r11f_g11f_b10f", GL_R11F_G11F_B10F },
	{ "rgb9_e5", GL_RGB9_E5 },
	{ "rgba8", GL_RGBA8 },
	{ "rgba8_snorm", GL_RGBA8_SNORM },
	{ "rgb565", GL_RGB565 },
	{ "rgba4", GL_RGBA4 },
	{ "rgb5_a1", GL_RGB5_A1 },
	{ "sr8", GL_SR8_EXT },
	{ "srg8", GL_SRG8_EXT },
	{ "srgb8_alpha8", GL_SRGB8_ALPHA8 },
	{ "rgb10_a2", GL_RGB10_A2 }
	};

	// Cube map array texture filtering.
	{
	tcu::TestCaseGroup* const groupCubeArray = new tcu::TestCaseGroup(m_testCtx, "cube_array", "Cube Map Array Texture Filtering");
	addChild(groupCubeArray);

	// Formats.
	{
	tcu::TestCaseGroup* const formatsGroup = new tcu::TestCaseGroup(m_testCtx, "formats", "Cube Map Array Texture Formats");
	groupCubeArray->addChild(formatsGroup);

	for (int fmtNdx = 0; fmtNdx < DE_LENGTH_OF_ARRAY(filterableFormatsByType); fmtNdx++)
	{
	for (int filterNdx = 0; filterNdx < DE_LENGTH_OF_ARRAY(minFilterModes); filterNdx++)
	{
	const deUint32 minFilter = minFilterModes[filterNdx].mode;
	const char* filterName = minFilterModes[filterNdx].name;
	const deUint32 format = filterableFormatsByType[fmtNdx].format;
	const char* formatName = filterableFormatsByType[fmtNdx].name;
	const bool isMipmap = minFilter != GL_NEAREST && minFilter != GL_LINEAR;
	const deUint32 magFilter = isMipmap ? GL_LINEAR : minFilter;
	const string name = string(formatName) + "_" + filterName;
	const deUint32 wrapS = GL_REPEAT;
	const deUint32 wrapT = GL_REPEAT;
	const int size = 64;
	const int depth = 12;

	formatsGroup->addChild(new TextureCubeArrayFilteringCase(m_context,
	name.c_str(), "",
	minFilter, magFilter,
	wrapS, wrapT,
	format,
	size, depth));
	}
	}
	}

	// Sizes.
	{
	tcu::TestCaseGroup* const sizesGroup = new tcu::TestCaseGroup(m_testCtx, "sizes", "Texture Sizes");
	groupCubeArray->addChild(sizesGroup);

	for (int sizeNdx = 0; sizeNdx < DE_LENGTH_OF_ARRAY(sizesCubeArray); sizeNdx++)
	{
	for (int filterNdx = 0; filterNdx < DE_LENGTH_OF_ARRAY(minFilterModes); filterNdx++)
	{
	const deUint32 minFilter = minFilterModes[filterNdx].mode;
	const char* filterName = minFilterModes[filterNdx].name;
	const deUint32 format = GL_RGBA8;
	const bool isMipmap = minFilter != GL_NEAREST && minFilter != GL_LINEAR;
	const deUint32 magFilter = isMipmap ? GL_LINEAR : minFilter;
	const deUint32 wrapS = GL_REPEAT;
	const deUint32 wrapT = GL_REPEAT;
	const int size = sizesCubeArray[sizeNdx].size;
	const int depth = sizesCubeArray[sizeNdx].depth;
	const string name = de::toString(size) + "x" + de::toString(size) + "x" + de::toString(depth) + "_" + filterName;

	sizesGroup->addChild(new TextureCubeArrayFilteringCase(m_context,
	name.c_str(), "",
	minFilter, magFilter,
	wrapS, wrapT,
	format,
	size, depth));
	}
	}
	}

	// Wrap modes.
	{
	tcu::TestCaseGroup* const combinationsGroup = new tcu::TestCaseGroup(m_testCtx, "combinations", "Filter and wrap mode combinations");
	groupCubeArray->addChild(combinationsGroup);

	for (int minFilterNdx = 0; minFilterNdx < DE_LENGTH_OF_ARRAY(minFilterModes); minFilterNdx++)
	{
	for (int magFilterNdx = 0; magFilterNdx < DE_LENGTH_OF_ARRAY(magFilterModes); magFilterNdx++)
	{
	for (int wrapSNdx = 0; wrapSNdx < DE_LENGTH_OF_ARRAY(wrapModes); wrapSNdx++)
	{
	for (int wrapTNdx = 0; wrapTNdx < DE_LENGTH_OF_ARRAY(wrapModes); wrapTNdx++)
	{
	const deUint32 minFilter = minFilterModes[minFilterNdx].mode;
	const deUint32 magFilter = magFilterModes[magFilterNdx].mode;
	const deUint32 format = GL_RGBA8;
	const deUint32 wrapS = wrapModes[wrapSNdx].mode;
	const deUint32 wrapT = wrapModes[wrapTNdx].mode;
	const int size = 63;
	const int depth = 12;
	const string name = string(minFilterModes[minFilterNdx].name) + "_" + magFilterModes[magFilterNdx].name + "_" + wrapModes[wrapSNdx].name + "_" + wrapModes[wrapTNdx].name;

	combinationsGroup->addChild(new TextureCubeArrayFilteringCase(m_context,
	name.c_str(), "",
	minFilter, magFilter,
	wrapS, wrapT,
	format,
	size, depth));
	}
	}
	}
	}
	}

	// Cases with no visible cube edges.
	{
	tcu::TestCaseGroup* const onlyFaceInteriorGroup = new tcu::TestCaseGroup(m_testCtx, "no_edges_visible", "Don't sample anywhere near a face's edges");
	groupCubeArray->addChild(onlyFaceInteriorGroup);

	for (int isLinearI = 0; isLinearI <= 1; isLinearI++)
	{
	const bool isLinear = isLinearI != 0;
	const deUint32 filter = isLinear ? GL_LINEAR : GL_NEAREST;

	onlyFaceInteriorGroup->addChild(new TextureCubeArrayFilteringCase(m_context,
	isLinear ? "linear" : "nearest", "",
	filter, filter,
	GL_REPEAT, GL_REPEAT,
	GL_RGBA8,
	63, 12,
	true));
	}
	}
	}
	}

	} // Functional
	} // gles31
	} // deqp