gles3/functional/es3fRasterizationTests.cpp

/*-------------------------------------------------------------------------
 * drawElements Quality Program OpenGL ES 3.0 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 Functional rasterization tests.
 *//*--------------------------------------------------------------------*/

#include "es3fRasterizationTests.hpp"
#include "tcuRasterizationVerifier.hpp"
#include "tcuSurface.hpp"
#include "tcuRenderTarget.hpp"
#include "tcuVectorUtil.hpp"
#include "tcuStringTemplate.hpp"
#include "tcuTextureUtil.hpp"
#include "tcuResultCollector.hpp"
#include "gluShaderProgram.hpp"
#include "gluRenderContext.hpp"
#include "gluPixelTransfer.hpp"
#include "gluStrUtil.hpp"
#include "gluTextureUtil.hpp"
#include "deStringUtil.hpp"
#include "deRandom.hpp"
#include "glwFunctions.hpp"
#include "glwEnums.hpp"

#include <vector>

namespace deqp
{
namespace gles3
{
namespace Functional
{
namespace
{

using tcu::RasterizationArguments;
using tcu::TriangleSceneSpec;
using tcu::PointSceneSpec;
using tcu::LineSceneSpec;
using tcu::LineInterpolationMethod;

static const char* const s_shaderVertexTemplate =	"#version 300 es\n"
													"in highp vec4 a_position;\n"
													"in highp vec4 a_color;\n"
													"${INTERPOLATION}out highp vec4 v_color;\n"
													"uniform highp float u_pointSize;\n"
													"void main ()\n"
													"{\n"
													"	gl_Position = a_position;\n"
													"	gl_PointSize = u_pointSize;\n"
													"	v_color = a_color;\n"
													"}\n";
static const char* const s_shaderFragmentTemplate =	"#version 300 es\n"
													"layout(location = 0) out highp vec4 fragColor;\n"
													"${INTERPOLATION}in highp vec4 v_color;\n"
													"void main ()\n"
													"{\n"
													"	fragColor = v_color;\n"
													"}\n";
enum InterpolationCaseFlags
{
	INTERPOLATIONFLAGS_NONE = 0,
	INTERPOLATIONFLAGS_PROJECTED = (1 << 1),
	INTERPOLATIONFLAGS_FLATSHADE = (1 << 2),
};

enum PrimitiveWideness
{
	PRIMITIVEWIDENESS_NARROW = 0,
	PRIMITIVEWIDENESS_WIDE,

	PRIMITIVEWIDENESS_LAST
};

static tcu::PixelFormat getInternalFormatPixelFormat (glw::GLenum internalFormat)
{
	const tcu::IVec4 bitDepth = tcu::getTextureFormatBitDepth(glu::mapGLInternalFormat(internalFormat));
	return tcu::PixelFormat(bitDepth.x(), bitDepth.y(), bitDepth.z(), bitDepth.w());
}

class BaseRenderingCase : public TestCase
{
public:
	enum RenderTarget
	{
		RENDERTARGET_DEFAULT = 0,
		RENDERTARGET_TEXTURE_2D,
		RENDERTARGET_RBO_SINGLESAMPLE,
		RENDERTARGET_RBO_MULTISAMPLE,

		RENDERTARGET_LAST
	};

	enum
	{
		DEFAULT_RENDER_SIZE = 256,
		SAMPLE_COUNT_MAX = -2,
	};

							BaseRenderingCase	(Context& context, const char* name, const char* desc, RenderTarget target, int numSamples, int renderSize);
							~BaseRenderingCase	(void);
	virtual void			init				(void);
	void					deinit				(void);

protected:
	void					drawPrimitives		(tcu::Surface& result, const std::vector<tcu::Vec4>& vertexData, glw::GLenum primitiveType);
	void					drawPrimitives		(tcu::Surface& result, const std::vector<tcu::Vec4>& vertexData, const std::vector<tcu::Vec4>& coloDrata, glw::GLenum primitiveType);

	virtual float			getLineWidth		(void) const;
	virtual float			getPointSize		(void) const;
	const tcu::PixelFormat&	getPixelFormat		(void) const;

	const int				m_renderSize;
	int						m_numSamples;
	int						m_subpixelBits;
	bool					m_flatshade;
	const int				m_numRequestedSamples;

private:
	const RenderTarget		m_renderTarget;
	const glw::GLenum		m_fboInternalFormat;
	const tcu::PixelFormat	m_pixelFormat;
	glu::ShaderProgram*		m_shader;
	glw::GLuint				m_fbo;
	glw::GLuint				m_texture;
	glw::GLuint				m_rbo;
	glw::GLuint				m_blitDstFbo;
	glw::GLuint				m_blitDstRbo;
};

BaseRenderingCase::BaseRenderingCase (Context& context, const char* name, const char* desc, RenderTarget target, int numSamples, int renderSize)
	: TestCase				(context, name, desc)
	, m_renderSize			(renderSize)
	, m_numSamples			(-1)
	, m_subpixelBits		(-1)
	, m_flatshade			(false)
	, m_numRequestedSamples	(numSamples)
	, m_renderTarget		(target)
	, m_fboInternalFormat	(GL_RGBA8)
	, m_pixelFormat			((m_renderTarget == RENDERTARGET_DEFAULT) ? (m_context.getRenderTarget().getPixelFormat()) : (getInternalFormatPixelFormat(m_fboInternalFormat)))
	, m_shader				(DE_NULL)
	, m_fbo					(0)
	, m_texture				(0)
	, m_rbo					(0)
	, m_blitDstFbo			(0)
	, m_blitDstRbo			(0)
{
	DE_ASSERT(m_renderTarget < RENDERTARGET_LAST);
	DE_ASSERT((m_numRequestedSamples == -1) == (m_renderTarget != RENDERTARGET_RBO_MULTISAMPLE));
}

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

void BaseRenderingCase::init (void)
{
	const glw::Functions&	gl						= m_context.getRenderContext().getFunctions();
	const int				width					= m_context.getRenderTarget().getWidth();
	const int				height					= m_context.getRenderTarget().getHeight();
	int						msaaTargetSamples		= -1;

	// Requirements

	if (m_renderTarget == RENDERTARGET_DEFAULT && (width < m_renderSize || height < m_renderSize))
		throw tcu::NotSupportedError(std::string("Render target size must be at least ") + de::toString(m_renderSize) + "x" + de::toString(m_renderSize));

	if (m_renderTarget == RENDERTARGET_RBO_MULTISAMPLE)
	{
		glw::GLint maxSampleCount = 0;
		gl.getInternalformativ(GL_RENDERBUFFER, m_fboInternalFormat, GL_SAMPLES, 1, &maxSampleCount);

		if (m_numRequestedSamples == SAMPLE_COUNT_MAX)
			msaaTargetSamples = maxSampleCount;
		else if (maxSampleCount >= m_numRequestedSamples)
			msaaTargetSamples = m_numRequestedSamples;
		else
			throw tcu::NotSupportedError("Test requires " + de::toString(m_numRequestedSamples) + "x msaa rbo");
	}

	// Gen shader

	{
		tcu::StringTemplate					vertexSource	(s_shaderVertexTemplate);
		tcu::StringTemplate					fragmentSource	(s_shaderFragmentTemplate);
		std::map<std::string, std::string>	params;

		params["INTERPOLATION"] = (m_flatshade) ? ("flat ") : ("");

		m_shader = new glu::ShaderProgram(m_context.getRenderContext(), glu::ProgramSources() << glu::VertexSource(vertexSource.specialize(params)) << glu::FragmentSource(fragmentSource.specialize(params)));
		if (!m_shader->isOk())
			throw tcu::TestError("could not create shader");
	}

	// Fbo
	if (m_renderTarget != RENDERTARGET_DEFAULT)
	{
		glw::GLenum error;

		gl.genFramebuffers(1, &m_fbo);
		gl.bindFramebuffer(GL_FRAMEBUFFER, m_fbo);

		switch (m_renderTarget)
		{
			case RENDERTARGET_TEXTURE_2D:
			{
				gl.genTextures(1, &m_texture);
				gl.bindTexture(GL_TEXTURE_2D, m_texture);
				gl.texStorage2D(GL_TEXTURE_2D, 1, m_fboInternalFormat, m_renderSize, m_renderSize);

				error = gl.getError();
				if (error == GL_OUT_OF_MEMORY)
					throw tcu::NotSupportedError("could not create target texture, got out of memory");
				else if (error != GL_NO_ERROR)
					throw tcu::TestError("got " + de::toString(glu::getErrorStr(error)));

				gl.framebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_texture, 0);
				break;
			}

			case RENDERTARGET_RBO_SINGLESAMPLE:
			case RENDERTARGET_RBO_MULTISAMPLE:
			{
				gl.genRenderbuffers(1, &m_rbo);
				gl.bindRenderbuffer(GL_RENDERBUFFER, m_rbo);

				if (m_renderTarget == RENDERTARGET_RBO_SINGLESAMPLE)
					gl.renderbufferStorage(GL_RENDERBUFFER, m_fboInternalFormat, m_renderSize, m_renderSize);
				else if (m_renderTarget == RENDERTARGET_RBO_MULTISAMPLE)
					gl.renderbufferStorageMultisample(GL_RENDERBUFFER, msaaTargetSamples, m_fboInternalFormat, m_renderSize, m_renderSize);
				else
					DE_ASSERT(false);

				error = gl.getError();
				if (error == GL_OUT_OF_MEMORY)
					throw tcu::NotSupportedError("could not create target texture, got out of memory");
				else if (error != GL_NO_ERROR)
					throw tcu::TestError("got " + de::toString(glu::getErrorStr(error)));

				gl.framebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, m_rbo);
				break;
			}

			default:
				DE_ASSERT(false);
		}
	}

	// Resolve (blitFramebuffer) target fbo for MSAA targets
	if (m_renderTarget == RENDERTARGET_RBO_MULTISAMPLE)
	{
		glw::GLenum error;

		gl.genFramebuffers(1, &m_blitDstFbo);
		gl.bindFramebuffer(GL_FRAMEBUFFER, m_blitDstFbo);

		gl.genRenderbuffers(1, &m_blitDstRbo);
		gl.bindRenderbuffer(GL_RENDERBUFFER, m_blitDstRbo);
		gl.renderbufferStorage(GL_RENDERBUFFER, GL_RGBA8, m_renderSize, m_renderSize);

		error = gl.getError();
		if (error == GL_OUT_OF_MEMORY)
			throw tcu::NotSupportedError("could not create blit target, got out of memory");
		else if (error != GL_NO_ERROR)
			throw tcu::TestError("got " + de::toString(glu::getErrorStr(error)));

		gl.framebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, m_blitDstRbo);

		// restore state
		gl.bindFramebuffer(GL_FRAMEBUFFER, m_fbo);
	}

	// Query info

	if (m_renderTarget == RENDERTARGET_DEFAULT)
		m_numSamples = m_context.getRenderTarget().getNumSamples();
	else if (m_renderTarget == RENDERTARGET_RBO_MULTISAMPLE)
	{
		m_numSamples = -1;
		gl.bindRenderbuffer(GL_RENDERBUFFER, m_rbo);
		gl.getRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_SAMPLES, &m_numSamples);

		GLU_EXPECT_NO_ERROR(gl.getError(), "get RENDERBUFFER_SAMPLES");
	}
	else
		m_numSamples = 0;

	gl.getIntegerv(GL_SUBPIXEL_BITS, &m_subpixelBits);

	m_testCtx.getLog() << tcu::TestLog::Message << "Sample count = " << m_numSamples << tcu::TestLog::EndMessage;
	m_testCtx.getLog() << tcu::TestLog::Message << "SUBPIXEL_BITS = " << m_subpixelBits << tcu::TestLog::EndMessage;
}

void BaseRenderingCase::deinit (void)
{
	if (m_shader)
	{
		delete m_shader;
		m_shader = DE_NULL;
	}

	if (m_fbo)
	{
		m_context.getRenderContext().getFunctions().deleteFramebuffers(1, &m_fbo);
		m_fbo = 0;
	}

	if (m_rbo)
	{
		m_context.getRenderContext().getFunctions().deleteRenderbuffers(1, &m_rbo);
		m_rbo = 0;
	}

	if (m_texture)
	{
		m_context.getRenderContext().getFunctions().deleteTextures(1, &m_texture);
		m_texture = 0;
	}

	if (m_blitDstFbo)
	{
		m_context.getRenderContext().getFunctions().deleteFramebuffers(1, &m_blitDstFbo);
		m_blitDstFbo = 0;
	}

	if (m_blitDstRbo)
	{
		m_context.getRenderContext().getFunctions().deleteRenderbuffers(1, &m_blitDstRbo);
		m_blitDstRbo = 0;
	}
}

void BaseRenderingCase::drawPrimitives (tcu::Surface& result, const std::vector<tcu::Vec4>& vertexData, glw::GLenum primitiveType)
{
	// default to color white
	const std::vector<tcu::Vec4> colorData(vertexData.size(), tcu::Vec4(1.0f, 1.0f, 1.0f, 1.0f));

	drawPrimitives(result, vertexData, colorData, primitiveType);
}

void BaseRenderingCase::drawPrimitives (tcu::Surface& result, const std::vector<tcu::Vec4>& vertexData, const std::vector<tcu::Vec4>& colorData, glw::GLenum primitiveType)
{
	const glw::Functions&	gl				= m_context.getRenderContext().getFunctions();
	const glw::GLint		positionLoc		= gl.getAttribLocation(m_shader->getProgram(), "a_position");
	const glw::GLint		colorLoc		= gl.getAttribLocation(m_shader->getProgram(), "a_color");
	const glw::GLint		pointSizeLoc	= gl.getUniformLocation(m_shader->getProgram(), "u_pointSize");

	gl.clearColor					(0, 0, 0, 1);
	gl.clear						(GL_COLOR_BUFFER_BIT);
	gl.viewport						(0, 0, m_renderSize, m_renderSize);
	gl.useProgram					(m_shader->getProgram());
	gl.enableVertexAttribArray		(positionLoc);
	gl.vertexAttribPointer			(positionLoc, 4, GL_FLOAT, GL_FALSE, 0, &vertexData[0]);
	gl.enableVertexAttribArray		(colorLoc);
	gl.vertexAttribPointer			(colorLoc, 4, GL_FLOAT, GL_FALSE, 0, &colorData[0]);
	gl.uniform1f					(pointSizeLoc, getPointSize());
	gl.lineWidth					(getLineWidth());
	gl.drawArrays					(primitiveType, 0, (glw::GLsizei)vertexData.size());
	gl.disableVertexAttribArray		(colorLoc);
	gl.disableVertexAttribArray		(positionLoc);
	gl.useProgram					(0);
	gl.finish						();
	GLU_EXPECT_NO_ERROR				(gl.getError(), "draw primitives");

	// read pixels
	if (m_renderTarget == RENDERTARGET_RBO_MULTISAMPLE)
	{
		// resolve msaa
		gl.bindFramebuffer(GL_READ_FRAMEBUFFER, m_fbo);
		gl.bindFramebuffer(GL_DRAW_FRAMEBUFFER, m_blitDstFbo);

		gl.blitFramebuffer(0, 0, m_renderSize, m_renderSize, 0, 0, m_renderSize, m_renderSize, GL_COLOR_BUFFER_BIT, GL_NEAREST);
		GLU_EXPECT_NO_ERROR(gl.getError(), "blit");

		// read resolved
		gl.bindFramebuffer(GL_READ_FRAMEBUFFER, m_blitDstFbo);

		glu::readPixels(m_context.getRenderContext(), 0, 0, result.getAccess());
		GLU_EXPECT_NO_ERROR(gl.getError(), "read pixels");

		gl.bindFramebuffer(GL_FRAMEBUFFER, m_fbo);
	}
	else
	{
		glu::readPixels(m_context.getRenderContext(), 0, 0, result.getAccess());
		GLU_EXPECT_NO_ERROR				(gl.getError(), "read pixels");
	}
}

float BaseRenderingCase::getLineWidth (void) const
{
	return 1.0f;
}

float BaseRenderingCase::getPointSize (void) const
{
	return 1.0f;
}

const tcu::PixelFormat& BaseRenderingCase::getPixelFormat (void) const
{
	return m_pixelFormat;
}

class BaseTriangleCase : public BaseRenderingCase
{
public:
							BaseTriangleCase	(Context& context, const char* name, const char* desc, glw::GLenum primitiveDrawType, BaseRenderingCase::RenderTarget renderTarget, int numSamples);
							~BaseTriangleCase	(void);
	IterateResult			iterate				(void);

private:
	virtual void			generateTriangles	(int iteration, std::vector<tcu::Vec4>& outData, std::vector<TriangleSceneSpec::SceneTriangle>& outTriangles) = DE_NULL;

	int						m_iteration;
	const int				m_iterationCount;
	const glw::GLenum		m_primitiveDrawType;
	bool					m_allIterationsPassed;
};

BaseTriangleCase::BaseTriangleCase (Context& context, const char* name, const char* desc, glw::GLenum primitiveDrawType, BaseRenderingCase::RenderTarget renderTarget, int numSamples)
	: BaseRenderingCase		(context, name, desc, renderTarget, numSamples, DEFAULT_RENDER_SIZE)
	, m_iteration			(0)
	, m_iterationCount		(3)
	, m_primitiveDrawType	(primitiveDrawType)
	, m_allIterationsPassed	(true)
{
}

BaseTriangleCase::~BaseTriangleCase (void)
{
}

BaseTriangleCase::IterateResult BaseTriangleCase::iterate (void)
{
	const std::string								iterationDescription	= "Test iteration " + de::toString(m_iteration+1) + " / " + de::toString(m_iterationCount);
	const tcu::ScopedLogSection						section					(m_testCtx.getLog(), iterationDescription, iterationDescription);
	tcu::Surface									resultImage				(m_renderSize, m_renderSize);
	std::vector<tcu::Vec4>							drawBuffer;
	std::vector<TriangleSceneSpec::SceneTriangle>	triangles;

	generateTriangles(m_iteration, drawBuffer, triangles);

	// draw image
	drawPrimitives(resultImage, drawBuffer, m_primitiveDrawType);

	// compare
	{
		bool					compareOk;
		RasterizationArguments	args;
		TriangleSceneSpec		scene;

		args.numSamples		= m_numSamples;
		args.subpixelBits	= m_subpixelBits;
		args.redBits		= getPixelFormat().redBits;
		args.greenBits		= getPixelFormat().greenBits;
		args.blueBits		= getPixelFormat().blueBits;

		scene.triangles.swap(triangles);

		compareOk = verifyTriangleGroupRasterization(resultImage, scene, args, m_testCtx.getLog());

		if (!compareOk)
			m_allIterationsPassed = false;
	}

	// result
	if (++m_iteration == m_iterationCount)
	{
		if (m_allIterationsPassed)
			m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
		else
			m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Incorrect rasterization");

		return STOP;
	}
	else
		return CONTINUE;
}

class BaseLineCase : public BaseRenderingCase
{
public:
							BaseLineCase		(Context& context, const char* name, const char* desc, glw::GLenum primitiveDrawType, PrimitiveWideness wideness, BaseRenderingCase::RenderTarget renderTarget, int numSamples);
							~BaseLineCase		(void);

	void					init				(void);
	IterateResult			iterate				(void);
	float					getLineWidth		(void) const;

private:
	virtual void			generateLines		(int iteration, std::vector<tcu::Vec4>& outData, std::vector<LineSceneSpec::SceneLine>& outLines) = DE_NULL;

	int						m_iteration;
	const int				m_iterationCount;
	const glw::GLenum		m_primitiveDrawType;
	const PrimitiveWideness	m_primitiveWideness;
	bool					m_allIterationsPassed;
	bool					m_multisampleRelaxationRequired;
	float					m_maxLineWidth;
	std::vector<float>		m_lineWidths;
};

BaseLineCase::BaseLineCase (Context& context, const char* name, const char* desc, glw::GLenum primitiveDrawType, PrimitiveWideness wideness, BaseRenderingCase::RenderTarget renderTarget, int numSamples)
	: BaseRenderingCase					(context, name, desc, renderTarget, numSamples, DEFAULT_RENDER_SIZE)
	, m_iteration						(0)
	, m_iterationCount					(3)
	, m_primitiveDrawType				(primitiveDrawType)
	, m_primitiveWideness				(wideness)
	, m_allIterationsPassed				(true)
	, m_multisampleRelaxationRequired	(false)
	, m_maxLineWidth					(1.0f)
{
	DE_ASSERT(m_primitiveWideness < PRIMITIVEWIDENESS_LAST);
}

BaseLineCase::~BaseLineCase (void)
{
}

void BaseLineCase::init (void)
{
	// create line widths
	if (m_primitiveWideness == PRIMITIVEWIDENESS_NARROW)
	{
		m_lineWidths.resize(m_iterationCount, 1.0f);
	}
	else if (m_primitiveWideness == PRIMITIVEWIDENESS_WIDE)
	{
		float range[2] = { 0.0f, 0.0f };
		m_context.getRenderContext().getFunctions().getFloatv(GL_ALIASED_LINE_WIDTH_RANGE, range);

		m_testCtx.getLog() << tcu::TestLog::Message << "ALIASED_LINE_WIDTH_RANGE = [" << range[0] << ", " << range[1] << "]" << tcu::TestLog::EndMessage;

		// no wide line support
		if (range[1] <= 1.0f)
			throw tcu::NotSupportedError("wide line support required");

		// set hand picked sizes
		m_lineWidths.push_back(5.0f);
		m_lineWidths.push_back(10.0f);
		m_lineWidths.push_back(range[1]);
		DE_ASSERT((int)m_lineWidths.size() == m_iterationCount);

		m_maxLineWidth = range[1];
	}
	else
		DE_ASSERT(false);

	// init parent
	BaseRenderingCase::init();
}

BaseLineCase::IterateResult BaseLineCase::iterate (void)
{
	const std::string						iterationDescription	= "Test iteration " + de::toString(m_iteration+1) + " / " + de::toString(m_iterationCount);
	const tcu::ScopedLogSection				section					(m_testCtx.getLog(), iterationDescription, iterationDescription);
	const float								lineWidth				= getLineWidth();
	tcu::Surface							resultImage				(m_renderSize, m_renderSize);
	std::vector<tcu::Vec4>					drawBuffer;
	std::vector<LineSceneSpec::SceneLine>	lines;

	// supported?
	if (lineWidth <= m_maxLineWidth)
	{
		// gen data
		generateLines(m_iteration, drawBuffer, lines);

		// draw image
		drawPrimitives(resultImage, drawBuffer, m_primitiveDrawType);

		// compare
		{
			bool					compareOk;
			RasterizationArguments	args;
			LineSceneSpec			scene;

			args.numSamples		= m_numSamples;
			args.subpixelBits	= m_subpixelBits;
			args.redBits		= getPixelFormat().redBits;
			args.greenBits		= getPixelFormat().greenBits;
			args.blueBits		= getPixelFormat().blueBits;

			scene.lines.swap(lines);
			scene.lineWidth = lineWidth;

			compareOk = verifyLineGroupRasterization(resultImage, scene, args, m_testCtx.getLog());

			// multisampled wide lines might not be supported
			if (scene.lineWidth != 1.0f && m_numSamples > 1 && !compareOk)
			{
				m_multisampleRelaxationRequired = true;
				compareOk = true;
			}

			if (!compareOk)
				m_allIterationsPassed = false;
		}
	}
	else
		m_testCtx.getLog() << tcu::TestLog::Message << "Line width " << lineWidth << " not supported, skipping iteration." << tcu::TestLog::EndMessage;

	// result
	if (++m_iteration == m_iterationCount)
	{
		if (m_allIterationsPassed && m_multisampleRelaxationRequired)
			m_testCtx.setTestResult(QP_TEST_RESULT_COMPATIBILITY_WARNING, "Rasterization of multisampled wide lines failed");
		else if (m_allIterationsPassed)
			m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
		else
			m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Incorrect rasterization");

		return STOP;
	}
	else
		return CONTINUE;
}

float BaseLineCase::getLineWidth (void) const
{
	return m_lineWidths[m_iteration];
}

class PointCase : public BaseRenderingCase
{
public:
							PointCase		(Context& context, const char* name, const char* desc, PrimitiveWideness wideness, BaseRenderingCase::RenderTarget renderTarget = RENDERTARGET_DEFAULT, int numSamples = -1);
							~PointCase		(void);

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

protected:
	float					getPointSize	(void) const;

private:
	void					generatePoints	(int iteration, std::vector<tcu::Vec4>& outData, std::vector<PointSceneSpec::ScenePoint>& outPoints);

	int						m_iteration;
	const int				m_iterationCount;
	const PrimitiveWideness	m_primitiveWideness;
	bool					m_allIterationsPassed;

	float					m_maxPointSize;
	std::vector<float>		m_pointSizes;
};

PointCase::PointCase (Context& context, const char* name, const char* desc, PrimitiveWideness wideness, BaseRenderingCase::RenderTarget renderTarget, int numSamples)
	: BaseRenderingCase		(context, name, desc, renderTarget, numSamples, DEFAULT_RENDER_SIZE)
	, m_iteration			(0)
	, m_iterationCount		(3)
	, m_primitiveWideness	(wideness)
	, m_allIterationsPassed	(true)
	, m_maxPointSize		(1.0f)
{
}

PointCase::~PointCase (void)
{
}

void PointCase::init (void)
{
	// create point sizes
	if (m_primitiveWideness == PRIMITIVEWIDENESS_NARROW)
	{
		m_pointSizes.resize(m_iterationCount, 1.0f);
	}
	else if (m_primitiveWideness == PRIMITIVEWIDENESS_WIDE)
	{
		float range[2] = { 0.0f, 0.0f };
		m_context.getRenderContext().getFunctions().getFloatv(GL_ALIASED_POINT_SIZE_RANGE, range);

		m_testCtx.getLog() << tcu::TestLog::Message << "GL_ALIASED_POINT_SIZE_RANGE = [" << range[0] << ", " << range[1] << "]" << tcu::TestLog::EndMessage;

		// no wide line support
		if (range[1] <= 1.0f)
			throw tcu::NotSupportedError("wide point support required");

		// set hand picked sizes
		m_pointSizes.push_back(10.0f);
		m_pointSizes.push_back(25.0f);
		m_pointSizes.push_back(range[1]);
		DE_ASSERT((int)m_pointSizes.size() == m_iterationCount);

		m_maxPointSize = range[1];
	}
	else
		DE_ASSERT(false);

	// init parent
	BaseRenderingCase::init();
}

PointCase::IterateResult PointCase::iterate (void)
{
	const std::string						iterationDescription	= "Test iteration " + de::toString(m_iteration+1) + " / " + de::toString(m_iterationCount);
	const tcu::ScopedLogSection				section					(m_testCtx.getLog(), iterationDescription, iterationDescription);
	const float								pointSize				= getPointSize();
	tcu::Surface							resultImage				(m_renderSize, m_renderSize);
	std::vector<tcu::Vec4>					drawBuffer;
	std::vector<PointSceneSpec::ScenePoint>	points;

	// supported?
	if (pointSize <= m_maxPointSize)
	{
		// gen data
		generatePoints(m_iteration, drawBuffer, points);

		// draw image
		drawPrimitives(resultImage, drawBuffer, GL_POINTS);

		// compare
		{
			bool					compareOk;
			RasterizationArguments	args;
			PointSceneSpec			scene;

			args.numSamples		= m_numSamples;
			args.subpixelBits	= m_subpixelBits;
			args.redBits		= getPixelFormat().redBits;
			args.greenBits		= getPixelFormat().greenBits;
			args.blueBits		= getPixelFormat().blueBits;

			scene.points.swap(points);

			compareOk = verifyPointGroupRasterization(resultImage, scene, args, m_testCtx.getLog());

			if (!compareOk)
				m_allIterationsPassed = false;
		}
	}
	else
		m_testCtx.getLog() << tcu::TestLog::Message << "Point size " << pointSize << " not supported, skipping iteration." << tcu::TestLog::EndMessage;

	// result
	if (++m_iteration == m_iterationCount)
	{
		if (m_allIterationsPassed)
			m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
		else
			m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Incorrect rasterization");

		return STOP;
	}
	else
		return CONTINUE;
}

float PointCase::getPointSize (void) const
{
	return m_pointSizes[m_iteration];
}

void PointCase::generatePoints (int iteration, std::vector<tcu::Vec4>& outData, std::vector<PointSceneSpec::ScenePoint>& outPoints)
{
	outData.resize(6);

	switch (iteration)
	{
		case 0:
			// \note: these values are chosen arbitrarily
			outData[0] = tcu::Vec4( 0.2f,  0.8f, 0.0f, 1.0f);
			outData[1] = tcu::Vec4( 0.5f,  0.2f, 0.0f, 1.0f);
			outData[2] = tcu::Vec4( 0.5f,  0.3f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4(-0.5f,  0.2f, 0.0f, 1.0f);
			outData[4] = tcu::Vec4(-0.2f, -0.4f, 0.0f, 1.0f);
			outData[5] = tcu::Vec4(-0.4f,  0.2f, 0.0f, 1.0f);
			break;

		case 1:
			outData[0] = tcu::Vec4(-0.499f, 0.128f, 0.0f, 1.0f);
			outData[1] = tcu::Vec4(-0.501f,  -0.3f, 0.0f, 1.0f);
			outData[2] = tcu::Vec4(  0.11f,  -0.2f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4(  0.11f,   0.2f, 0.0f, 1.0f);
			outData[4] = tcu::Vec4(  0.88f,   0.9f, 0.0f, 1.0f);
			outData[5] = tcu::Vec4(   0.4f,   1.2f, 0.0f, 1.0f);
			break;

		case 2:
			outData[0] = tcu::Vec4( -0.9f, -0.3f, 0.0f, 1.0f);
			outData[1] = tcu::Vec4(  0.3f, -0.9f, 0.0f, 1.0f);
			outData[2] = tcu::Vec4( -0.4f, -0.1f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4(-0.11f,  0.2f, 0.0f, 1.0f);
			outData[4] = tcu::Vec4( 0.88f,  0.7f, 0.0f, 1.0f);
			outData[5] = tcu::Vec4( -0.4f,  0.4f, 0.0f, 1.0f);
			break;
	}

	outPoints.resize(outData.size());
	for (int pointNdx = 0; pointNdx < (int)outPoints.size(); ++pointNdx)
	{
		outPoints[pointNdx].position = outData[pointNdx];
		outPoints[pointNdx].pointSize = getPointSize();
	}

	// log
	m_testCtx.getLog() << tcu::TestLog::Message << "Rendering " << outPoints.size() << " point(s): (point size = " << getPointSize() << ")" << tcu::TestLog::EndMessage;
	for (int pointNdx = 0; pointNdx < (int)outPoints.size(); ++pointNdx)
		m_testCtx.getLog() << tcu::TestLog::Message << "Point " << (pointNdx+1) << ":\t" << outPoints[pointNdx].position << tcu::TestLog::EndMessage;
}

class TrianglesCase : public BaseTriangleCase
{
public:
	TrianglesCase		(Context& context, const char* name, const char* desc, BaseRenderingCase::RenderTarget renderTarget = RENDERTARGET_DEFAULT, int numSamples = -1);
	~TrianglesCase		(void);

	void	generateTriangles	(int iteration, std::vector<tcu::Vec4>& outData, std::vector<TriangleSceneSpec::SceneTriangle>& outTriangles);
};

TrianglesCase::TrianglesCase (Context& context, const char* name, const char* desc, BaseRenderingCase::RenderTarget renderTarget, int numSamples)
	: BaseTriangleCase(context, name, desc, GL_TRIANGLES, renderTarget, numSamples)
{
}

TrianglesCase::~TrianglesCase (void)
{

}

void TrianglesCase::generateTriangles (int iteration, std::vector<tcu::Vec4>& outData, std::vector<TriangleSceneSpec::SceneTriangle>& outTriangles)
{
	outData.resize(6);

	switch (iteration)
	{
		case 0:
			// \note: these values are chosen arbitrarily
			outData[0] = tcu::Vec4( 0.2f,  0.8f, 0.0f, 1.0f);
			outData[1] = tcu::Vec4( 0.5f,  0.2f, 0.0f, 1.0f);
			outData[2] = tcu::Vec4( 0.5f,  0.3f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4(-0.5f,  0.2f, 0.0f, 1.0f);
			outData[4] = tcu::Vec4(-1.5f, -0.4f, 0.0f, 1.0f);
			outData[5] = tcu::Vec4(-0.4f,  0.2f, 0.0f, 1.0f);
			break;

		case 1:
			outData[0] = tcu::Vec4(-0.499f, 0.128f, 0.0f, 1.0f);
			outData[1] = tcu::Vec4(-0.501f,  -0.3f, 0.0f, 1.0f);
			outData[2] = tcu::Vec4(  0.11f,  -0.2f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4(  0.11f,   0.2f, 0.0f, 1.0f);
			outData[4] = tcu::Vec4(  0.88f,   0.9f, 0.0f, 1.0f);
			outData[5] = tcu::Vec4(   0.4f,   1.2f, 0.0f, 1.0f);
			break;

		case 2:
			outData[0] = tcu::Vec4( -0.9f, -0.3f, 0.0f, 1.0f);
			outData[1] = tcu::Vec4(  1.1f, -0.9f, 0.0f, 1.0f);
			outData[2] = tcu::Vec4( -1.1f, -0.1f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4(-0.11f,  0.2f, 0.0f, 1.0f);
			outData[4] = tcu::Vec4( 0.88f,  0.7f, 0.0f, 1.0f);
			outData[5] = tcu::Vec4( -0.4f,  0.4f, 0.0f, 1.0f);
			break;
	}

	outTriangles.resize(2);
	outTriangles[0].positions[0] = outData[0];	outTriangles[0].sharedEdge[0] = false;
	outTriangles[0].positions[1] = outData[1];	outTriangles[0].sharedEdge[1] = false;
	outTriangles[0].positions[2] = outData[2];	outTriangles[0].sharedEdge[2] = false;

	outTriangles[1].positions[0] = outData[3];	outTriangles[1].sharedEdge[0] = false;
	outTriangles[1].positions[1] = outData[4];	outTriangles[1].sharedEdge[1] = false;
	outTriangles[1].positions[2] = outData[5];	outTriangles[1].sharedEdge[2] = false;

	// log
	m_testCtx.getLog() << tcu::TestLog::Message << "Rendering " << outTriangles.size() << " triangle(s):" << tcu::TestLog::EndMessage;
	for (int triangleNdx = 0; triangleNdx < (int)outTriangles.size(); ++triangleNdx)
	{
		m_testCtx.getLog()
			<< tcu::TestLog::Message
			<< "Triangle " << (triangleNdx+1) << ":"
			<< "\n\t" << outTriangles[triangleNdx].positions[0]
			<< "\n\t" << outTriangles[triangleNdx].positions[1]
			<< "\n\t" << outTriangles[triangleNdx].positions[2]
			<< tcu::TestLog::EndMessage;
	}
}

class TriangleStripCase : public BaseTriangleCase
{
public:
			TriangleStripCase	(Context& context, const char* name, const char* desc, BaseRenderingCase::RenderTarget renderTarget = RENDERTARGET_DEFAULT, int numSamples = -1);

	void	generateTriangles	(int iteration, std::vector<tcu::Vec4>& outData, std::vector<TriangleSceneSpec::SceneTriangle>& outTriangles);
};

TriangleStripCase::TriangleStripCase (Context& context, const char* name, const char* desc, BaseRenderingCase::RenderTarget renderTarget, int numSamples)
	: BaseTriangleCase(context, name, desc, GL_TRIANGLE_STRIP, renderTarget, numSamples)
{
}

void TriangleStripCase::generateTriangles (int iteration, std::vector<tcu::Vec4>& outData, std::vector<TriangleSceneSpec::SceneTriangle>& outTriangles)
{
	outData.resize(5);

	switch (iteration)
	{
		case 0:
			// \note: these values are chosen arbitrarily
			outData[0] = tcu::Vec4(-0.504f,  0.8f,   0.0f, 1.0f);
			outData[1] = tcu::Vec4(-0.2f,   -0.2f,   0.0f, 1.0f);
			outData[2] = tcu::Vec4(-0.2f,    0.199f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4( 0.5f,    0.201f, 0.0f, 1.0f);
			outData[4] = tcu::Vec4( 1.5f,    0.4f,   0.0f, 1.0f);
			break;

		case 1:
			outData[0] = tcu::Vec4(-0.499f, 0.129f,  0.0f, 1.0f);
			outData[1] = tcu::Vec4(-0.501f,  -0.3f,  0.0f, 1.0f);
			outData[2] = tcu::Vec4(  0.11f,  -0.2f,  0.0f, 1.0f);
			outData[3] = tcu::Vec4(  0.11f,  -0.31f, 0.0f, 1.0f);
			outData[4] = tcu::Vec4(  0.88f,   0.9f,  0.0f, 1.0f);
			break;

		case 2:
			outData[0] = tcu::Vec4( -0.9f, -0.3f,  0.0f, 1.0f);
			outData[1] = tcu::Vec4(  1.1f, -0.9f,  0.0f, 1.0f);
			outData[2] = tcu::Vec4(-0.87f, -0.1f,  0.0f, 1.0f);
			outData[3] = tcu::Vec4(-0.11f,  0.19f, 0.0f, 1.0f);
			outData[4] = tcu::Vec4( 0.88f,  0.7f,  0.0f, 1.0f);
			break;
	}

	outTriangles.resize(3);
	outTriangles[0].positions[0] = outData[0];	outTriangles[0].sharedEdge[0] = false;
	outTriangles[0].positions[1] = outData[1];	outTriangles[0].sharedEdge[1] = true;
	outTriangles[0].positions[2] = outData[2];	outTriangles[0].sharedEdge[2] = false;

	outTriangles[1].positions[0] = outData[2];	outTriangles[1].sharedEdge[0] = true;
	outTriangles[1].positions[1] = outData[1];	outTriangles[1].sharedEdge[1] = false;
	outTriangles[1].positions[2] = outData[3];	outTriangles[1].sharedEdge[2] = true;

	outTriangles[2].positions[0] = outData[2];	outTriangles[2].sharedEdge[0] = true;
	outTriangles[2].positions[1] = outData[3];	outTriangles[2].sharedEdge[1] = false;
	outTriangles[2].positions[2] = outData[4];	outTriangles[2].sharedEdge[2] = false;

	// log
	m_testCtx.getLog() << tcu::TestLog::Message << "Rendering triangle strip, " << outData.size() << " vertices." << tcu::TestLog::EndMessage;
	for (int vtxNdx = 0; vtxNdx < (int)outData.size(); ++vtxNdx)
	{
		m_testCtx.getLog()
			<< tcu::TestLog::Message
			<< "\t" << outData[vtxNdx]
			<< tcu::TestLog::EndMessage;
	}
}

class TriangleFanCase : public BaseTriangleCase
{
public:
			TriangleFanCase		(Context& context, const char* name, const char* desc, BaseRenderingCase::RenderTarget renderTarget = RENDERTARGET_DEFAULT, int numSamples = -1);

	void	generateTriangles	(int iteration, std::vector<tcu::Vec4>& outData, std::vector<TriangleSceneSpec::SceneTriangle>& outTriangles);
};

TriangleFanCase::TriangleFanCase (Context& context, const char* name, const char* desc, BaseRenderingCase::RenderTarget renderTarget, int numSamples)
	: BaseTriangleCase(context, name, desc, GL_TRIANGLE_FAN, renderTarget, numSamples)
{
}

void TriangleFanCase::generateTriangles (int iteration, std::vector<tcu::Vec4>& outData, std::vector<TriangleSceneSpec::SceneTriangle>& outTriangles)
{
	outData.resize(5);

	switch (iteration)
	{
		case 0:
			// \note: these values are chosen arbitrarily
			outData[0] = tcu::Vec4( 0.01f,  0.0f, 0.0f, 1.0f);
			outData[1] = tcu::Vec4( 0.5f,   0.2f, 0.0f, 1.0f);
			outData[2] = tcu::Vec4( 0.46f,  0.3f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4(-0.5f,   0.2f, 0.0f, 1.0f);
			outData[4] = tcu::Vec4(-1.5f,  -0.4f, 0.0f, 1.0f);
			break;

		case 1:
			outData[0] = tcu::Vec4(-0.499f, 0.128f, 0.0f, 1.0f);
			outData[1] = tcu::Vec4(-0.501f,  -0.3f, 0.0f, 1.0f);
			outData[2] = tcu::Vec4(  0.11f,  -0.2f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4(  0.11f,   0.2f, 0.0f, 1.0f);
			outData[4] = tcu::Vec4(  0.88f,   0.9f, 0.0f, 1.0f);
			break;

		case 2:
			outData[0] = tcu::Vec4( -0.9f, -0.3f, 0.0f, 1.0f);
			outData[1] = tcu::Vec4(  1.1f, -0.9f, 0.0f, 1.0f);
			outData[2] = tcu::Vec4(  0.7f, -0.1f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4( 0.11f,  0.2f, 0.0f, 1.0f);
			outData[4] = tcu::Vec4( 0.88f,  0.7f, 0.0f, 1.0f);
			break;
	}

	outTriangles.resize(3);
	outTriangles[0].positions[0] = outData[0];	outTriangles[0].sharedEdge[0] = false;
	outTriangles[0].positions[1] = outData[1];	outTriangles[0].sharedEdge[1] = false;
	outTriangles[0].positions[2] = outData[2];	outTriangles[0].sharedEdge[2] = true;

	outTriangles[1].positions[0] = outData[0];	outTriangles[1].sharedEdge[0] = true;
	outTriangles[1].positions[1] = outData[2];	outTriangles[1].sharedEdge[1] = false;
	outTriangles[1].positions[2] = outData[3];	outTriangles[1].sharedEdge[2] = true;

	outTriangles[2].positions[0] = outData[0];	outTriangles[2].sharedEdge[0] = true;
	outTriangles[2].positions[1] = outData[3];	outTriangles[2].sharedEdge[1] = false;
	outTriangles[2].positions[2] = outData[4];	outTriangles[2].sharedEdge[2] = false;

	// log
	m_testCtx.getLog() << tcu::TestLog::Message << "Rendering triangle fan, " << outData.size() << " vertices." << tcu::TestLog::EndMessage;
	for (int vtxNdx = 0; vtxNdx < (int)outData.size(); ++vtxNdx)
	{
		m_testCtx.getLog()
			<< tcu::TestLog::Message
			<< "\t" << outData[vtxNdx]
			<< tcu::TestLog::EndMessage;
	}
}

class LinesCase : public BaseLineCase
{
public:
			LinesCase		(Context& context, const char* name, const char* desc, PrimitiveWideness wideness, BaseRenderingCase::RenderTarget renderTarget = RENDERTARGET_DEFAULT, int numSamples = -1);

	void	generateLines	(int iteration, std::vector<tcu::Vec4>& outData, std::vector<LineSceneSpec::SceneLine>& outLines);
};

LinesCase::LinesCase (Context& context, const char* name, const char* desc, PrimitiveWideness wideness, BaseRenderingCase::RenderTarget renderTarget, int numSamples)
	: BaseLineCase(context, name, desc, GL_LINES, wideness, renderTarget, numSamples)
{
}

void LinesCase::generateLines (int iteration, std::vector<tcu::Vec4>& outData, std::vector<LineSceneSpec::SceneLine>& outLines)
{
	outData.resize(6);

	switch (iteration)
	{
		case 0:
			// \note: these values are chosen arbitrarily
			outData[0] = tcu::Vec4( 0.01f,  0.0f, 0.0f, 1.0f);
			outData[1] = tcu::Vec4( 0.5f,   0.2f, 0.0f, 1.0f);
			outData[2] = tcu::Vec4( 0.46f,  0.3f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4(-0.3f,   0.2f, 0.0f, 1.0f);
			outData[4] = tcu::Vec4(-1.5f,  -0.4f, 0.0f, 1.0f);
			outData[5] = tcu::Vec4( 0.1f,   0.5f, 0.0f, 1.0f);
			break;

		case 1:
			outData[0] = tcu::Vec4(-0.499f, 0.128f, 0.0f, 1.0f);
			outData[1] = tcu::Vec4(-0.501f,  -0.3f, 0.0f, 1.0f);
			outData[2] = tcu::Vec4(  0.11f,  -0.2f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4(  0.11f,   0.2f, 0.0f, 1.0f);
			outData[4] = tcu::Vec4(  0.88f,   0.9f, 0.0f, 1.0f);
			outData[5] = tcu::Vec4(  0.18f,  -0.2f, 0.0f, 1.0f);
			break;

		case 2:
			outData[0] = tcu::Vec4( -0.9f, -0.3f, 0.0f, 1.0f);
			outData[1] = tcu::Vec4(  1.1f, -0.9f, 0.0f, 1.0f);
			outData[2] = tcu::Vec4(  0.7f, -0.1f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4( 0.11f,  0.2f, 0.0f, 1.0f);
			outData[4] = tcu::Vec4( 0.88f,  0.7f, 0.0f, 1.0f);
			outData[5] = tcu::Vec4(  0.8f, -0.7f, 0.0f, 1.0f);
			break;
	}

	outLines.resize(3);
	outLines[0].positions[0] = outData[0];
	outLines[0].positions[1] = outData[1];
	outLines[1].positions[0] = outData[2];
	outLines[1].positions[1] = outData[3];
	outLines[2].positions[0] = outData[4];
	outLines[2].positions[1] = outData[5];

	// log
	m_testCtx.getLog() << tcu::TestLog::Message << "Rendering " << outLines.size() << " lines(s): (width = " << getLineWidth() << ")" << tcu::TestLog::EndMessage;
	for (int lineNdx = 0; lineNdx < (int)outLines.size(); ++lineNdx)
	{
		m_testCtx.getLog()
			<< tcu::TestLog::Message
			<< "Line " << (lineNdx+1) << ":"
			<< "\n\t" << outLines[lineNdx].positions[0]
			<< "\n\t" << outLines[lineNdx].positions[1]
			<< tcu::TestLog::EndMessage;
	}
}

class LineStripCase : public BaseLineCase
{
public:
			LineStripCase	(Context& context, const char* name, const char* desc, PrimitiveWideness wideness, BaseRenderingCase::RenderTarget renderTarget = RENDERTARGET_DEFAULT, int numSamples = -1);

	void	generateLines	(int iteration, std::vector<tcu::Vec4>& outData, std::vector<LineSceneSpec::SceneLine>& outLines);
};

LineStripCase::LineStripCase (Context& context, const char* name, const char* desc, PrimitiveWideness wideness, BaseRenderingCase::RenderTarget renderTarget, int numSamples)
	: BaseLineCase(context, name, desc, GL_LINE_STRIP, wideness, renderTarget, numSamples)
{
}

void LineStripCase::generateLines (int iteration, std::vector<tcu::Vec4>& outData, std::vector<LineSceneSpec::SceneLine>& outLines)
{
	outData.resize(4);

	switch (iteration)
	{
		case 0:
			// \note: these values are chosen arbitrarily
			outData[0] = tcu::Vec4( 0.01f,  0.0f, 0.0f, 1.0f);
			outData[1] = tcu::Vec4( 0.5f,   0.2f, 0.0f, 1.0f);
			outData[2] = tcu::Vec4( 0.46f,  0.3f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4(-0.5f,   0.2f, 0.0f, 1.0f);
			break;

		case 1:
			outData[0] = tcu::Vec4(-0.499f, 0.128f, 0.0f, 1.0f);
			outData[1] = tcu::Vec4(-0.501f,  -0.3f, 0.0f, 1.0f);
			outData[2] = tcu::Vec4(  0.11f,  -0.2f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4(  0.11f,   0.2f, 0.0f, 1.0f);
			break;

		case 2:
			outData[0] = tcu::Vec4( -0.9f, -0.3f, 0.0f, 1.0f);
			outData[1] = tcu::Vec4(  1.1f, -0.9f, 0.0f, 1.0f);
			outData[2] = tcu::Vec4(  0.7f, -0.1f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4( 0.11f,  0.2f, 0.0f, 1.0f);
			break;
	}

	outLines.resize(3);
	outLines[0].positions[0] = outData[0];
	outLines[0].positions[1] = outData[1];
	outLines[1].positions[0] = outData[1];
	outLines[1].positions[1] = outData[2];
	outLines[2].positions[0] = outData[2];
	outLines[2].positions[1] = outData[3];

	// log
	m_testCtx.getLog() << tcu::TestLog::Message << "Rendering line strip, width = " << getLineWidth() << ", " << outData.size() << " vertices." << tcu::TestLog::EndMessage;
	for (int vtxNdx = 0; vtxNdx < (int)outData.size(); ++vtxNdx)
	{
		m_testCtx.getLog()
			<< tcu::TestLog::Message
			<< "\t" << outData[vtxNdx]
			<< tcu::TestLog::EndMessage;
	}
}

class LineLoopCase : public BaseLineCase
{
public:
			LineLoopCase	(Context& context, const char* name, const char* desc, PrimitiveWideness wideness, BaseRenderingCase::RenderTarget renderTarget = RENDERTARGET_DEFAULT, int numSamples = -1);

	void	generateLines	(int iteration, std::vector<tcu::Vec4>& outData, std::vector<LineSceneSpec::SceneLine>& outLines);
};

LineLoopCase::LineLoopCase (Context& context, const char* name, const char* desc, PrimitiveWideness wideness, BaseRenderingCase::RenderTarget renderTarget, int numSamples)
	: BaseLineCase(context, name, desc, GL_LINE_LOOP, wideness, renderTarget, numSamples)
{
}

void LineLoopCase::generateLines (int iteration, std::vector<tcu::Vec4>& outData, std::vector<LineSceneSpec::SceneLine>& outLines)
{
	outData.resize(4);

	switch (iteration)
	{
		case 0:
			// \note: these values are chosen arbitrarily
			outData[0] = tcu::Vec4( 0.01f,  0.0f, 0.0f, 1.0f);
			outData[1] = tcu::Vec4( 0.5f,   0.2f, 0.0f, 1.0f);
			outData[2] = tcu::Vec4( 0.46f,  0.3f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4(-0.5f,   0.2f, 0.0f, 1.0f);
			break;

		case 1:
			outData[0] = tcu::Vec4(-0.499f, 0.128f, 0.0f, 1.0f);
			outData[1] = tcu::Vec4(-0.501f,  -0.3f, 0.0f, 1.0f);
			outData[2] = tcu::Vec4(  0.11f,  -0.2f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4(  0.11f,   0.2f, 0.0f, 1.0f);
			break;

		case 2:
			outData[0] = tcu::Vec4( -0.9f, -0.3f, 0.0f, 1.0f);
			outData[1] = tcu::Vec4(  1.1f, -0.9f, 0.0f, 1.0f);
			outData[2] = tcu::Vec4(  0.7f, -0.1f, 0.0f, 1.0f);
			outData[3] = tcu::Vec4( 0.11f,  0.2f, 0.0f, 1.0f);
			break;
	}

	outLines.resize(4);
	outLines[0].positions[0] = outData[0];
	outLines[0].positions[1] = outData[1];
	outLines[1].positions[0] = outData[1];
	outLines[1].positions[1] = outData[2];
	outLines[2].positions[0] = outData[2];
	outLines[2].positions[1] = outData[3];
	outLines[3].positions[0] = outData[3];
	outLines[3].positions[1] = outData[0];

	// log
	m_testCtx.getLog() << tcu::TestLog::Message << "Rendering line loop, width = " << getLineWidth() << ", " << outData.size() << " vertices." << tcu::TestLog::EndMessage;
	for (int vtxNdx = 0; vtxNdx < (int)outData.size(); ++vtxNdx)
	{
		m_testCtx.getLog()
			<< tcu::TestLog::Message
			<< "\t" << outData[vtxNdx]
			<< tcu::TestLog::EndMessage;
	}
}

class FillRuleCase : public BaseRenderingCase
{
public:
	enum FillRuleCaseType
	{
		FILLRULECASE_BASIC = 0,
		FILLRULECASE_REVERSED,
		FILLRULECASE_CLIPPED_FULL,
		FILLRULECASE_CLIPPED_PARTIAL,
		FILLRULECASE_PROJECTED,

		FILLRULECASE_LAST
	};

							FillRuleCase		(Context& ctx, const char* name, const char* desc, FillRuleCaseType type, RenderTarget renderTarget = RENDERTARGET_DEFAULT, int numSamples = -1);
							~FillRuleCase		(void);
	IterateResult			iterate				(void);

private:
	int						getRenderSize		(FillRuleCase::FillRuleCaseType type) const;
	int						getNumIterations	(FillRuleCase::FillRuleCaseType type) const;
	void					generateTriangles	(int iteration, std::vector<tcu::Vec4>& outData) const;

	const FillRuleCaseType	m_caseType;
	int						m_iteration;
	const int				m_iterationCount;
	bool					m_allIterationsPassed;

};

FillRuleCase::FillRuleCase (Context& ctx, const char* name, const char* desc, FillRuleCaseType type, RenderTarget renderTarget, int numSamples)
	: BaseRenderingCase		(ctx, name, desc, renderTarget, numSamples, getRenderSize(type))
	, m_caseType			(type)
	, m_iteration			(0)
	, m_iterationCount		(getNumIterations(type))
	, m_allIterationsPassed	(true)
{
	DE_ASSERT(type < FILLRULECASE_LAST);
}

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

FillRuleCase::IterateResult FillRuleCase::iterate (void)
{
	const std::string						iterationDescription	= "Test iteration " + de::toString(m_iteration+1) + " / " + de::toString(m_iterationCount);
	const tcu::ScopedLogSection				section					(m_testCtx.getLog(), iterationDescription, iterationDescription);
	const int								thresholdRed			= 1 << (8 - getPixelFormat().redBits);
	const int								thresholdGreen			= 1 << (8 - getPixelFormat().greenBits);
	const int								thresholdBlue			= 1 << (8 - getPixelFormat().blueBits);
	tcu::Surface							resultImage				(m_renderSize, m_renderSize);
	std::vector<tcu::Vec4>					drawBuffer;
	bool									imageShown				= false;

	generateTriangles(m_iteration, drawBuffer);

	// draw image
	{
		const glw::Functions&			gl				= m_context.getRenderContext().getFunctions();
		const std::vector<tcu::Vec4>	colorBuffer		(drawBuffer.size(), tcu::Vec4(0.5f, 0.5f, 0.5f, 1.0f));

		m_testCtx.getLog() << tcu::TestLog::Message << "Drawing gray triangles with shared edges.\nEnabling additive blending to detect overlapping fragments." << tcu::TestLog::EndMessage;

		gl.enable(GL_BLEND);
		gl.blendEquation(GL_FUNC_ADD);
		gl.blendFunc(GL_ONE, GL_ONE);
		drawPrimitives(resultImage, drawBuffer, colorBuffer, GL_TRIANGLES);
	}

	// verify no overdraw
	{
		const tcu::RGBA	triangleColor	= tcu::RGBA(127, 127, 127, 255);
		bool			overdraw		= false;

		m_testCtx.getLog() << tcu::TestLog::Message << "Verifying result." << tcu::TestLog::EndMessage;

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

			// color values are greater than triangle color? Allow lower values for multisampled edges and background.
			if ((color.getRed()   - triangleColor.getRed())   > thresholdRed   ||
				(color.getGreen() - triangleColor.getGreen()) > thresholdGreen ||
				(color.getBlue()  - triangleColor.getBlue())  > thresholdBlue)
				overdraw = true;
		}

		// results
		if (!overdraw)
			m_testCtx.getLog() << tcu::TestLog::Message << "No overlapping fragments detected." << tcu::TestLog::EndMessage;
		else
		{
			m_testCtx.getLog()	<< tcu::TestLog::Message << "Overlapping fragments detected, image is not valid." << tcu::TestLog::EndMessage;
			m_testCtx.getLog()	<< tcu::TestLog::ImageSet("Result of rendering", "Result of rendering")
								<< tcu::TestLog::Image("Result", "Result", resultImage)
								<< tcu::TestLog::EndImageSet;

			imageShown = true;
			m_allIterationsPassed = false;
		}
	}

	// verify no missing fragments in the full viewport case
	if (m_caseType == FILLRULECASE_CLIPPED_FULL)
	{
		bool missingFragments = false;

		m_testCtx.getLog() << tcu::TestLog::Message << "Searching missing fragments." << tcu::TestLog::EndMessage;

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

			// black? (background)
			if (color.getRed()   <= thresholdRed   ||
				color.getGreen() <= thresholdGreen ||
				color.getBlue()  <= thresholdBlue)
				missingFragments = true;
		}

		// results
		if (!missingFragments)
			m_testCtx.getLog() << tcu::TestLog::Message << "No missing fragments detected." << tcu::TestLog::EndMessage;
		else
		{
			m_testCtx.getLog()	<< tcu::TestLog::Message << "Missing fragments detected, image is not valid." << tcu::TestLog::EndMessage;

			if (!imageShown)
			{
				m_testCtx.getLog()	<< tcu::TestLog::ImageSet("Result of rendering", "Result of rendering")
									<< tcu::TestLog::Image("Result", "Result", resultImage)
									<< tcu::TestLog::EndImageSet;
			}

			m_allIterationsPassed = false;
		}
	}

	// result
	if (++m_iteration == m_iterationCount)
	{
		if (m_allIterationsPassed)
			m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
		else
			m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Found invalid pixels");

		return STOP;
	}
	else
		return CONTINUE;
}

int FillRuleCase::getRenderSize (FillRuleCase::FillRuleCaseType type) const
{
	if (type == FILLRULECASE_CLIPPED_FULL || type == FILLRULECASE_CLIPPED_PARTIAL)
		return DEFAULT_RENDER_SIZE / 4;
	else
		return DEFAULT_RENDER_SIZE;
}

int FillRuleCase::getNumIterations (FillRuleCase::FillRuleCaseType type) const
{
	if (type == FILLRULECASE_CLIPPED_FULL || type == FILLRULECASE_CLIPPED_PARTIAL)
		return 15;
	else
		return 2;
}

void FillRuleCase::generateTriangles (int iteration, std::vector<tcu::Vec4>& outData) const
{
	switch (m_caseType)
	{
		case FILLRULECASE_BASIC:
		case FILLRULECASE_REVERSED:
		case FILLRULECASE_PROJECTED:
		{
			const int	numRows		= 4;
			const int	numColumns	= 4;
			const float	quadSide	= 0.15f;
			de::Random	rnd			(0xabcd);

			outData.resize(6 * numRows * numColumns);

			for (int col = 0; col < numColumns; ++col)
			for (int row = 0; row < numRows;    ++row)
			{
				const tcu::Vec2 center		= tcu::Vec2(((float)row + 0.5f) / (float)numRows * 2.0f - 1.0f, ((float)col + 0.5f) / (float)numColumns * 2.0f - 1.0f);
				const float		rotation	= (float)(iteration * numColumns * numRows + col * numRows + row) / (float)(m_iterationCount * numColumns * numRows) * DE_PI / 2.0f;
				const tcu::Vec2 sideH		= quadSide * tcu::Vec2(deFloatCos(rotation), deFloatSin(rotation));
				const tcu::Vec2 sideV		= tcu::Vec2(sideH.y(), -sideH.x());
				const tcu::Vec2 quad[4]		=
				{
					center + sideH + sideV,
					center + sideH - sideV,
					center - sideH - sideV,
					center - sideH + sideV,
				};

				if (m_caseType == FILLRULECASE_BASIC)
				{
					outData[6 * (col * numRows + row) + 0] = tcu::Vec4(quad[0].x(), quad[0].y(), 0.0f, 1.0f);
					outData[6 * (col * numRows + row) + 1] = tcu::Vec4(quad[1].x(), quad[1].y(), 0.0f, 1.0f);
					outData[6 * (col * numRows + row) + 2] = tcu::Vec4(quad[2].x(), quad[2].y(), 0.0f, 1.0f);
					outData[6 * (col * numRows + row) + 3] = tcu::Vec4(quad[2].x(), quad[2].y(), 0.0f, 1.0f);
					outData[6 * (col * numRows + row) + 4] = tcu::Vec4(quad[0].x(), quad[0].y(), 0.0f, 1.0f);
					outData[6 * (col * numRows + row) + 5] = tcu::Vec4(quad[3].x(), quad[3].y(), 0.0f, 1.0f);
				}
				else if (m_caseType == FILLRULECASE_REVERSED)
				{
					outData[6 * (col * numRows + row) + 0] = tcu::Vec4(quad[0].x(), quad[0].y(), 0.0f, 1.0f);
					outData[6 * (col * numRows + row) + 1] = tcu::Vec4(quad[1].x(), quad[1].y(), 0.0f, 1.0f);
					outData[6 * (col * numRows + row) + 2] = tcu::Vec4(quad[2].x(), quad[2].y(), 0.0f, 1.0f);
					outData[6 * (col * numRows + row) + 3] = tcu::Vec4(quad[0].x(), quad[0].y(), 0.0f, 1.0f);
					outData[6 * (col * numRows + row) + 4] = tcu::Vec4(quad[2].x(), quad[2].y(), 0.0f, 1.0f);
					outData[6 * (col * numRows + row) + 5] = tcu::Vec4(quad[3].x(), quad[3].y(), 0.0f, 1.0f);
				}
				else if (m_caseType == FILLRULECASE_PROJECTED)
				{
					const float w0 = rnd.getFloat(0.1f, 4.0f);
					const float w1 = rnd.getFloat(0.1f, 4.0f);
					const float w2 = rnd.getFloat(0.1f, 4.0f);
					const float w3 = rnd.getFloat(0.1f, 4.0f);

					outData[6 * (col * numRows + row) + 0] = tcu::Vec4(quad[0].x() * w0, quad[0].y() * w0, 0.0f, w0);
					outData[6 * (col * numRows + row) + 1] = tcu::Vec4(quad[1].x() * w1, quad[1].y() * w1, 0.0f, w1);
					outData[6 * (col * numRows + row) + 2] = tcu::Vec4(quad[2].x() * w2, quad[2].y() * w2, 0.0f, w2);
					outData[6 * (col * numRows + row) + 3] = tcu::Vec4(quad[2].x() * w2, quad[2].y() * w2, 0.0f, w2);
					outData[6 * (col * numRows + row) + 4] = tcu::Vec4(quad[0].x() * w0, quad[0].y() * w0, 0.0f, w0);
					outData[6 * (col * numRows + row) + 5] = tcu::Vec4(quad[3].x() * w3, quad[3].y() * w3, 0.0f, w3);
				}
				else
					DE_ASSERT(DE_FALSE);
			}

			break;
		}

		case FILLRULECASE_CLIPPED_PARTIAL:
		case FILLRULECASE_CLIPPED_FULL:
		{
			const float		quadSide	= (m_caseType == FILLRULECASE_CLIPPED_PARTIAL) ? (1.0f) : (2.0f);
			const tcu::Vec2 center		= (m_caseType == FILLRULECASE_CLIPPED_PARTIAL) ? (tcu::Vec2(0.5f, 0.5f)) : (tcu::Vec2(0.0f, 0.0f));
			const float		rotation	= (float)(iteration) / (float)(m_iterationCount - 1) * DE_PI / 2.0f;
			const tcu::Vec2 sideH		= quadSide * tcu::Vec2(deFloatCos(rotation), deFloatSin(rotation));
			const tcu::Vec2 sideV		= tcu::Vec2(sideH.y(), -sideH.x());
			const tcu::Vec2 quad[4]		=
			{
				center + sideH + sideV,
				center + sideH - sideV,
				center - sideH - sideV,
				center - sideH + sideV,
			};

			outData.resize(6);
			outData[0] = tcu::Vec4(quad[0].x(), quad[0].y(), 0.0f, 1.0f);
			outData[1] = tcu::Vec4(quad[1].x(), quad[1].y(), 0.0f, 1.0f);
			outData[2] = tcu::Vec4(quad[2].x(), quad[2].y(), 0.0f, 1.0f);
			outData[3] = tcu::Vec4(quad[2].x(), quad[2].y(), 0.0f, 1.0f);
			outData[4] = tcu::Vec4(quad[0].x(), quad[0].y(), 0.0f, 1.0f);
			outData[5] = tcu::Vec4(quad[3].x(), quad[3].y(), 0.0f, 1.0f);
			break;
		}

		default:
			DE_ASSERT(DE_FALSE);
	}
}

class CullingTest : public BaseRenderingCase
{
public:
						CullingTest			(Context& ctx, const char* name, const char* desc, glw::GLenum cullMode, glw::GLenum primitive, glw::GLenum faceOrder);
						~CullingTest		(void);
	IterateResult		iterate				(void);

private:
	void				generateVertices	(std::vector<tcu::Vec4>& outData) const;
	void				extractTriangles	(std::vector<TriangleSceneSpec::SceneTriangle>& outTriangles, const std::vector<tcu::Vec4>& vertices) const;
	bool				triangleOrder		(const tcu::Vec4& v0, const tcu::Vec4& v1, const tcu::Vec4& v2) const;

	const glw::GLenum	m_cullMode;
	const glw::GLenum	m_primitive;
	const glw::GLenum	m_faceOrder;
};

CullingTest::CullingTest (Context& ctx, const char* name, const char* desc, glw::GLenum cullMode, glw::GLenum primitive, glw::GLenum faceOrder)
	: BaseRenderingCase	(ctx, name, desc, RENDERTARGET_DEFAULT, -1, DEFAULT_RENDER_SIZE)
	, m_cullMode		(cullMode)
	, m_primitive		(primitive)
	, m_faceOrder		(faceOrder)
{
}

CullingTest::~CullingTest (void)
{
}

CullingTest::IterateResult CullingTest::iterate (void)
{
	tcu::Surface									resultImage(m_renderSize, m_renderSize);
	std::vector<tcu::Vec4>							drawBuffer;
	std::vector<TriangleSceneSpec::SceneTriangle>	triangles;

	// generate scene
	generateVertices(drawBuffer);
	extractTriangles(triangles, drawBuffer);

	// draw image
	{
		const glw::Functions& gl = m_context.getRenderContext().getFunctions();

		gl.enable(GL_CULL_FACE);
		gl.cullFace(m_cullMode);
		gl.frontFace(m_faceOrder);

		m_testCtx.getLog() << tcu::TestLog::Message << "Setting front face to " << glu::getWindingName(m_faceOrder) << tcu::TestLog::EndMessage;
		m_testCtx.getLog() << tcu::TestLog::Message << "Setting cull face to " << glu::getFaceName(m_cullMode) << tcu::TestLog::EndMessage;
		m_testCtx.getLog() << tcu::TestLog::Message << "Drawing test pattern (" << glu::getPrimitiveTypeName(m_primitive) << ")" << tcu::TestLog::EndMessage;

		drawPrimitives(resultImage, drawBuffer, m_primitive);
	}

	// compare
	{
		RasterizationArguments	args;
		TriangleSceneSpec		scene;

		args.numSamples		= m_numSamples;
		args.subpixelBits	= m_subpixelBits;
		args.redBits		= getPixelFormat().redBits;
		args.greenBits		= getPixelFormat().greenBits;
		args.blueBits		= getPixelFormat().blueBits;

		scene.triangles.swap(triangles);

		if (verifyTriangleGroupRasterization(resultImage, scene, args, m_testCtx.getLog(), tcu::VERIFICATIONMODE_WEAK))
			m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
		else
			m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Incorrect rendering");
	}

	return STOP;
}

void CullingTest::generateVertices (std::vector<tcu::Vec4>& outData) const
{
	de::Random rnd(543210);

	outData.resize(6);
	for (int vtxNdx = 0; vtxNdx < (int)outData.size(); ++vtxNdx)
	{
		outData[vtxNdx].x() = rnd.getFloat(-0.9f, 0.9f);
		outData[vtxNdx].y() = rnd.getFloat(-0.9f, 0.9f);
		outData[vtxNdx].z() = 0.0f;
		outData[vtxNdx].w() = 1.0f;
	}
}

void CullingTest::extractTriangles (std::vector<TriangleSceneSpec::SceneTriangle>& outTriangles, const std::vector<tcu::Vec4>& vertices) const
{
	const bool cullDirection = (m_cullMode == GL_FRONT) ^ (m_faceOrder == GL_CCW);

	// No triangles
	if (m_cullMode == GL_FRONT_AND_BACK)
		return;

	switch (m_primitive)
	{
		case GL_TRIANGLES:
		{
			for (int vtxNdx = 0; vtxNdx < (int)vertices.size() - 2; vtxNdx += 3)
			{
				const tcu::Vec4& v0 = vertices[vtxNdx + 0];
				const tcu::Vec4& v1 = vertices[vtxNdx + 1];
				const tcu::Vec4& v2 = vertices[vtxNdx + 2];

				if (triangleOrder(v0, v1, v2) != cullDirection)
				{
					TriangleSceneSpec::SceneTriangle tri;
					tri.positions[0] = v0;	tri.sharedEdge[0] = false;
					tri.positions[1] = v1;	tri.sharedEdge[1] = false;
					tri.positions[2] = v2;	tri.sharedEdge[2] = false;

					outTriangles.push_back(tri);
				}
			}
			break;
		}

		case GL_TRIANGLE_STRIP:
		{
			for (int vtxNdx = 0; vtxNdx < (int)vertices.size() - 2; ++vtxNdx)
			{
				const tcu::Vec4& v0 = vertices[vtxNdx + 0];
				const tcu::Vec4& v1 = vertices[vtxNdx + 1];
				const tcu::Vec4& v2 = vertices[vtxNdx + 2];

				if (triangleOrder(v0, v1, v2) != (cullDirection ^ (vtxNdx % 2 != 0)))
				{
					TriangleSceneSpec::SceneTriangle tri;
					tri.positions[0] = v0;	tri.sharedEdge[0] = false;
					tri.positions[1] = v1;	tri.sharedEdge[1] = false;
					tri.positions[2] = v2;	tri.sharedEdge[2] = false;

					outTriangles.push_back(tri);
				}
			}
			break;
		}

		case GL_TRIANGLE_FAN:
		{
			for (int vtxNdx = 1; vtxNdx < (int)vertices.size() - 1; ++vtxNdx)
			{
				const tcu::Vec4& v0 = vertices[0];
				const tcu::Vec4& v1 = vertices[vtxNdx + 0];
				const tcu::Vec4& v2 = vertices[vtxNdx + 1];

				if (triangleOrder(v0, v1, v2) != cullDirection)
				{
					TriangleSceneSpec::SceneTriangle tri;
					tri.positions[0] = v0;	tri.sharedEdge[0] = false;
					tri.positions[1] = v1;	tri.sharedEdge[1] = false;
					tri.positions[2] = v2;	tri.sharedEdge[2] = false;

					outTriangles.push_back(tri);
				}
			}
			break;
		}

		default:
			DE_ASSERT(false);
	}
}

bool CullingTest::triangleOrder (const tcu::Vec4& v0, const tcu::Vec4& v1, const tcu::Vec4& v2) const
{
	const tcu::Vec2 s0 = v0.swizzle(0, 1) / v0.w();
	const tcu::Vec2 s1 = v1.swizzle(0, 1) / v1.w();
	const tcu::Vec2 s2 = v2.swizzle(0, 1) / v2.w();

	// cross
	return ((s1.x() - s0.x()) * (s2.y() - s0.y()) - (s2.x() - s0.x()) * (s1.y() - s0.y())) < 0;
}

class TriangleInterpolationTest : public BaseRenderingCase
{
public:
						TriangleInterpolationTest	(Context& ctx, const char* name, const char* desc, glw::GLenum primitive, int flags, RenderTarget renderTarget = RENDERTARGET_DEFAULT, int numSamples = -1);
						~TriangleInterpolationTest	(void);
	IterateResult		iterate						(void);

private:
	void				generateVertices			(int iteration, std::vector<tcu::Vec4>& outVertices, std::vector<tcu::Vec4>& outColors) const;
	void				extractTriangles			(std::vector<TriangleSceneSpec::SceneTriangle>& outTriangles, const std::vector<tcu::Vec4>& vertices, const std::vector<tcu::Vec4>& colors) const;

	const glw::GLenum	m_primitive;
	const bool			m_projective;
	const int			m_iterationCount;

	int					m_iteration;
	bool				m_allIterationsPassed;
};

TriangleInterpolationTest::TriangleInterpolationTest (Context& ctx, const char* name, const char* desc, glw::GLenum primitive, int flags, RenderTarget renderTarget, int numSamples)
	: BaseRenderingCase		(ctx, name, desc, renderTarget, numSamples, DEFAULT_RENDER_SIZE)
	, m_primitive			(primitive)
	, m_projective			((flags & INTERPOLATIONFLAGS_PROJECTED) != 0)
	, m_iterationCount		(3)
	, m_iteration			(0)
	, m_allIterationsPassed	(true)
{
	m_flatshade = ((flags & INTERPOLATIONFLAGS_FLATSHADE) != 0);
}

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

TriangleInterpolationTest::IterateResult TriangleInterpolationTest::iterate (void)
{
	const std::string								iterationDescription	= "Test iteration " + de::toString(m_iteration+1) + " / " + de::toString(m_iterationCount);
	const tcu::ScopedLogSection						section					(m_testCtx.getLog(), "Iteration" + de::toString(m_iteration+1), iterationDescription);
	tcu::Surface									resultImage				(m_renderSize, m_renderSize);
	std::vector<tcu::Vec4>							drawBuffer;
	std::vector<tcu::Vec4>							colorBuffer;
	std::vector<TriangleSceneSpec::SceneTriangle>	triangles;

	// generate scene
	generateVertices(m_iteration, drawBuffer, colorBuffer);
	extractTriangles(triangles, drawBuffer, colorBuffer);

	// log
	{
		m_testCtx.getLog() << tcu::TestLog::Message << "Generated vertices:" << tcu::TestLog::EndMessage;
		for (int vtxNdx = 0; vtxNdx < (int)drawBuffer.size(); ++vtxNdx)
			m_testCtx.getLog() << tcu::TestLog::Message << "\t" << drawBuffer[vtxNdx] << ",\tcolor= " << colorBuffer[vtxNdx] << tcu::TestLog::EndMessage;
	}

	// draw image
	drawPrimitives(resultImage, drawBuffer, colorBuffer, m_primitive);

	// compare
	{
		RasterizationArguments	args;
		TriangleSceneSpec		scene;

		args.numSamples		= m_numSamples;
		args.subpixelBits	= m_subpixelBits;
		args.redBits		= getPixelFormat().redBits;
		args.greenBits		= getPixelFormat().greenBits;
		args.blueBits		= getPixelFormat().blueBits;

		scene.triangles.swap(triangles);

		if (!verifyTriangleGroupInterpolation(resultImage, scene, args, m_testCtx.getLog()))
			m_allIterationsPassed = false;
	}

	// result
	if (++m_iteration == m_iterationCount)
	{
		if (m_allIterationsPassed)
			m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
		else
			m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Found invalid pixel values");

		return STOP;
	}
	else
		return CONTINUE;
}

void TriangleInterpolationTest::generateVertices (int iteration, std::vector<tcu::Vec4>& outVertices, std::vector<tcu::Vec4>& outColors) const
{
	// use only red, green and blue
	const tcu::Vec4 colors[] =
	{
		tcu::Vec4(1.0f, 0.0f, 0.0f, 1.0f),
		tcu::Vec4(0.0f, 1.0f, 0.0f, 1.0f),
		tcu::Vec4(0.0f, 0.0f, 1.0f, 1.0f),
	};

	de::Random rnd(123 + iteration * 1000 + (int)m_primitive);

	outVertices.resize(6);
	outColors.resize(6);

	for (int vtxNdx = 0; vtxNdx < (int)outVertices.size(); ++vtxNdx)
	{
		outVertices[vtxNdx].x() = rnd.getFloat(-0.9f, 0.9f);
		outVertices[vtxNdx].y() = rnd.getFloat(-0.9f, 0.9f);
		outVertices[vtxNdx].z() = 0.0f;

		if (!m_projective)
			outVertices[vtxNdx].w() = 1.0f;
		else
		{
			const float w = rnd.getFloat(0.2f, 4.0f);

			outVertices[vtxNdx].x() *= w;
			outVertices[vtxNdx].y() *= w;
			outVertices[vtxNdx].z() *= w;
			outVertices[vtxNdx].w() = w;
		}

		outColors[vtxNdx] = colors[vtxNdx % DE_LENGTH_OF_ARRAY(colors)];
	}
}

void TriangleInterpolationTest::extractTriangles (std::vector<TriangleSceneSpec::SceneTriangle>& outTriangles, const std::vector<tcu::Vec4>& vertices, const std::vector<tcu::Vec4>& colors) const
{
	switch (m_primitive)
	{
		case GL_TRIANGLES:
		{
			for (int vtxNdx = 0; vtxNdx < (int)vertices.size() - 2; vtxNdx += 3)
			{
				TriangleSceneSpec::SceneTriangle tri;
				tri.positions[0]	= vertices[vtxNdx + 0];
				tri.positions[1]	= vertices[vtxNdx + 1];
				tri.positions[2]	= vertices[vtxNdx + 2];
				tri.sharedEdge[0]	= false;
				tri.sharedEdge[1]	= false;
				tri.sharedEdge[2]	= false;

				if (m_flatshade)
				{
					tri.colors[0] = colors[vtxNdx + 2];
					tri.colors[1] = colors[vtxNdx + 2];
					tri.colors[2] = colors[vtxNdx + 2];
				}
				else
				{
					tri.colors[0] = colors[vtxNdx + 0];
					tri.colors[1] = colors[vtxNdx + 1];
					tri.colors[2] = colors[vtxNdx + 2];
				}

				outTriangles.push_back(tri);
			}
			break;
		}

		case GL_TRIANGLE_STRIP:
		{
			for (int vtxNdx = 0; vtxNdx < (int)vertices.size() - 2; ++vtxNdx)
			{
				TriangleSceneSpec::SceneTriangle tri;
				tri.positions[0]	= vertices[vtxNdx + 0];
				tri.positions[1]	= vertices[vtxNdx + 1];
				tri.positions[2]	= vertices[vtxNdx + 2];
				tri.sharedEdge[0]	= false;
				tri.sharedEdge[1]	= false;
				tri.sharedEdge[2]	= false;

				if (m_flatshade)
				{
					tri.colors[0] = colors[vtxNdx + 2];
					tri.colors[1] = colors[vtxNdx + 2];
					tri.colors[2] = colors[vtxNdx + 2];
				}
				else
				{
					tri.colors[0] = colors[vtxNdx + 0];
					tri.colors[1] = colors[vtxNdx + 1];
					tri.colors[2] = colors[vtxNdx + 2];
				}

				outTriangles.push_back(tri);
			}
			break;
		}

		case GL_TRIANGLE_FAN:
		{
			for (int vtxNdx = 1; vtxNdx < (int)vertices.size() - 1; ++vtxNdx)
			{
				TriangleSceneSpec::SceneTriangle tri;
				tri.positions[0]	= vertices[0];
				tri.positions[1]	= vertices[vtxNdx + 0];
				tri.positions[2]	= vertices[vtxNdx + 1];
				tri.sharedEdge[0]	= false;
				tri.sharedEdge[1]	= false;
				tri.sharedEdge[2]	= false;

				if (m_flatshade)
				{
					tri.colors[0] = colors[vtxNdx + 1];
					tri.colors[1] = colors[vtxNdx + 1];
					tri.colors[2] = colors[vtxNdx + 1];
				}
				else
				{
					tri.colors[0] = colors[0];
					tri.colors[1] = colors[vtxNdx + 0];
					tri.colors[2] = colors[vtxNdx + 1];
				}

				outTriangles.push_back(tri);
			}
			break;
		}

		default:
			DE_ASSERT(false);
	}
}

class LineInterpolationTest : public BaseRenderingCase
{
public:
							LineInterpolationTest	(Context& ctx, const char* name, const char* desc, glw::GLenum primitive, int flags, PrimitiveWideness wideness, RenderTarget renderTarget = RENDERTARGET_DEFAULT, int numSamples = -1);
							~LineInterpolationTest	(void);

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

private:
	void					generateVertices		(int iteration, std::vector<tcu::Vec4>& outVertices, std::vector<tcu::Vec4>& outColors) const;
	void					extractLines			(std::vector<LineSceneSpec::SceneLine>& outLines, const std::vector<tcu::Vec4>& vertices, const std::vector<tcu::Vec4>& colors) const;
	float					getLineWidth			(void) const;

	const glw::GLenum		m_primitive;
	const bool				m_projective;
	const int				m_iterationCount;
	const PrimitiveWideness	m_primitiveWideness;

	int						m_iteration;
	tcu::ResultCollector	m_result;
	float					m_maxLineWidth;
	std::vector<float>		m_lineWidths;
};

LineInterpolationTest::LineInterpolationTest (Context& ctx, const char* name, const char* desc, glw::GLenum primitive, int flags, PrimitiveWideness wideness, RenderTarget renderTarget, int numSamples)
	: BaseRenderingCase		(ctx, name, desc, renderTarget, numSamples, DEFAULT_RENDER_SIZE)
	, m_primitive			(primitive)
	, m_projective			((flags & INTERPOLATIONFLAGS_PROJECTED) != 0)
	, m_iterationCount		(3)
	, m_primitiveWideness	(wideness)
	, m_iteration			(0)
	, m_maxLineWidth		(1.0f)
{
	m_flatshade = ((flags & INTERPOLATIONFLAGS_FLATSHADE) != 0);
}

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

void LineInterpolationTest::init (void)
{
	// create line widths
	if (m_primitiveWideness == PRIMITIVEWIDENESS_NARROW)
	{
		m_lineWidths.resize(m_iterationCount, 1.0f);
	}
	else if (m_primitiveWideness == PRIMITIVEWIDENESS_WIDE)
	{
		float range[2] = { 0.0f, 0.0f };
		m_context.getRenderContext().getFunctions().getFloatv(GL_ALIASED_LINE_WIDTH_RANGE, range);

		m_testCtx.getLog() << tcu::TestLog::Message << "ALIASED_LINE_WIDTH_RANGE = [" << range[0] << ", " << range[1] << "]" << tcu::TestLog::EndMessage;

		// no wide line support
		if (range[1] <= 1.0f)
			throw tcu::NotSupportedError("wide line support required");

		// set hand picked sizes
		m_lineWidths.push_back(5.0f);
		m_lineWidths.push_back(10.0f);
		m_lineWidths.push_back(range[1]);
		DE_ASSERT((int)m_lineWidths.size() == m_iterationCount);

		m_maxLineWidth = range[1];
	}
	else
		DE_ASSERT(false);

	// init parent
	BaseRenderingCase::init();
}

LineInterpolationTest::IterateResult LineInterpolationTest::iterate (void)
{
	const std::string						iterationDescription	= "Test iteration " + de::toString(m_iteration+1) + " / " + de::toString(m_iterationCount);
	const tcu::ScopedLogSection				section					(m_testCtx.getLog(), "Iteration" + de::toString(m_iteration+1), iterationDescription);
	const float								lineWidth				= getLineWidth();
	tcu::Surface							resultImage				(m_renderSize, m_renderSize);
	std::vector<tcu::Vec4>					drawBuffer;
	std::vector<tcu::Vec4>					colorBuffer;
	std::vector<LineSceneSpec::SceneLine>	lines;

	// supported?
	if (lineWidth <= m_maxLineWidth)
	{
		// generate scene
		generateVertices(m_iteration, drawBuffer, colorBuffer);
		extractLines(lines, drawBuffer, colorBuffer);

		// log
		{
			m_testCtx.getLog() << tcu::TestLog::Message << "Generated vertices:" << tcu::TestLog::EndMessage;
			for (int vtxNdx = 0; vtxNdx < (int)drawBuffer.size(); ++vtxNdx)
				m_testCtx.getLog() << tcu::TestLog::Message << "\t" << drawBuffer[vtxNdx] << ",\tcolor= " << colorBuffer[vtxNdx] << tcu::TestLog::EndMessage;
		}

		// draw image
		drawPrimitives(resultImage, drawBuffer, colorBuffer, m_primitive);

		// compare
		{
			RasterizationArguments	args;
			LineSceneSpec			scene;
			LineInterpolationMethod	iterationResult;

			args.numSamples		= m_numSamples;
			args.subpixelBits	= m_subpixelBits;
			args.redBits		= getPixelFormat().redBits;
			args.greenBits		= getPixelFormat().greenBits;
			args.blueBits		= getPixelFormat().blueBits;

			scene.lines.swap(lines);
			scene.lineWidth = getLineWidth();

			iterationResult = verifyLineGroupInterpolation(resultImage, scene, args, m_testCtx.getLog());
			switch (iterationResult)
			{
				case tcu::LINEINTERPOLATION_STRICTLY_CORRECT:
					// line interpolation matches the specification
					m_result.addResult(QP_TEST_RESULT_PASS, "Pass");
					break;

				case tcu::LINEINTERPOLATION_PROJECTED:
					// line interpolation weights are otherwise correct, but they are projected onto major axis
					m_testCtx.getLog()	<< tcu::TestLog::Message
										<< "Interpolation was calculated using coordinates projected onto major axis. "
										"This method does not produce the same values as the non-projecting method defined in the specification."
										<< tcu::TestLog::EndMessage;
					m_result.addResult(QP_TEST_RESULT_QUALITY_WARNING, "Interpolation was calculated using projected coordinateds");
					break;

				case tcu::LINEINTERPOLATION_INCORRECT:
					if (scene.lineWidth != 1.0f && m_numSamples > 1)
					{
						// multisampled wide lines might not be supported
						m_result.addResult(QP_TEST_RESULT_COMPATIBILITY_WARNING, "Interpolation of multisampled wide lines failed");
					}
					else
					{
						// line interpolation is incorrect
						m_result.addResult(QP_TEST_RESULT_FAIL, "Found invalid pixel values");
					}
					break;

				default:
					DE_ASSERT(false);
					break;
			}
		}
	}
	else
		m_testCtx.getLog() << tcu::TestLog::Message << "Line width " << lineWidth << " not supported, skipping iteration." << tcu::TestLog::EndMessage;

	// result
	if (++m_iteration == m_iterationCount)
	{
		m_result.setTestContextResult(m_testCtx);
		return STOP;
	}
	else
		return CONTINUE;
}

void LineInterpolationTest::generateVertices (int iteration, std::vector<tcu::Vec4>& outVertices, std::vector<tcu::Vec4>& outColors) const
{
	// use only red, green and blue
	const tcu::Vec4 colors[] =
	{
		tcu::Vec4(1.0f, 0.0f, 0.0f, 1.0f),
		tcu::Vec4(0.0f, 1.0f, 0.0f, 1.0f),
		tcu::Vec4(0.0f, 0.0f, 1.0f, 1.0f),
	};

	de::Random rnd(123 + iteration * 1000 + (int)m_primitive);

	outVertices.resize(6);
	outColors.resize(6);

	for (int vtxNdx = 0; vtxNdx < (int)outVertices.size(); ++vtxNdx)
	{
		outVertices[vtxNdx].x() = rnd.getFloat(-0.9f, 0.9f);
		outVertices[vtxNdx].y() = rnd.getFloat(-0.9f, 0.9f);
		outVertices[vtxNdx].z() = 0.0f;

		if (!m_projective)
			outVertices[vtxNdx].w() = 1.0f;
		else
		{
			const float w = rnd.getFloat(0.2f, 4.0f);

			outVertices[vtxNdx].x() *= w;
			outVertices[vtxNdx].y() *= w;
			outVertices[vtxNdx].z() *= w;
			outVertices[vtxNdx].w() = w;
		}

		outColors[vtxNdx] = colors[vtxNdx % DE_LENGTH_OF_ARRAY(colors)];
	}
}

void LineInterpolationTest::extractLines (std::vector<LineSceneSpec::SceneLine>& outLines, const std::vector<tcu::Vec4>& vertices, const std::vector<tcu::Vec4>& colors) const
{
	switch (m_primitive)
	{
		case GL_LINES:
		{
			for (int vtxNdx = 0; vtxNdx < (int)vertices.size() - 1; vtxNdx += 2)
			{
				LineSceneSpec::SceneLine line;
				line.positions[0] = vertices[vtxNdx + 0];
				line.positions[1] = vertices[vtxNdx + 1];

				if (m_flatshade)
				{
					line.colors[0] = colors[vtxNdx + 1];
					line.colors[1] = colors[vtxNdx + 1];
				}
				else
				{
					line.colors[0] = colors[vtxNdx + 0];
					line.colors[1] = colors[vtxNdx + 1];
				}

				outLines.push_back(line);
			}
			break;
		}

		case GL_LINE_STRIP:
		{
			for (int vtxNdx = 0; vtxNdx < (int)vertices.size() - 1; ++vtxNdx)
			{
				LineSceneSpec::SceneLine line;
				line.positions[0] = vertices[vtxNdx + 0];
				line.positions[1] = vertices[vtxNdx + 1];

				if (m_flatshade)
				{
					line.colors[0] = colors[vtxNdx + 1];
					line.colors[1] = colors[vtxNdx + 1];
				}
				else
				{
					line.colors[0] = colors[vtxNdx + 0];
					line.colors[1] = colors[vtxNdx + 1];
				}

				outLines.push_back(line);
			}
			break;
		}

		case GL_LINE_LOOP:
		{
			for (int vtxNdx = 0; vtxNdx < (int)vertices.size(); ++vtxNdx)
			{
				LineSceneSpec::SceneLine line;
				line.positions[0] = vertices[(vtxNdx + 0) % (int)vertices.size()];
				line.positions[1] = vertices[(vtxNdx + 1) % (int)vertices.size()];

				if (m_flatshade)
				{
					line.colors[0] = colors[(vtxNdx + 1) % (int)vertices.size()];
					line.colors[1] = colors[(vtxNdx + 1) % (int)vertices.size()];
				}
				else
				{
					line.colors[0] = colors[(vtxNdx + 0) % (int)vertices.size()];
					line.colors[1] = colors[(vtxNdx + 1) % (int)vertices.size()];
				}

				outLines.push_back(line);
			}
			break;
		}

		default:
			DE_ASSERT(false);
	}
}

float LineInterpolationTest::getLineWidth (void) const
{
	return m_lineWidths[m_iteration];
}

} // anonymous

RasterizationTests::RasterizationTests (Context& context)
	: TestCaseGroup(context, "rasterization", "Rasterization Tests")
{
}

RasterizationTests::~RasterizationTests (void)
{
}

void RasterizationTests::init (void)
{
	// .primitives
	{
		tcu::TestCaseGroup* const primitives = new tcu::TestCaseGroup(m_testCtx, "primitives", "Primitive rasterization");

		addChild(primitives);

		primitives->addChild(new TrianglesCase		(m_context, "triangles",		"Render primitives as GL_TRIANGLES, verify rasterization result"));
		primitives->addChild(new TriangleStripCase	(m_context, "triangle_strip",	"Render primitives as GL_TRIANGLE_STRIP, verify rasterization result"));
		primitives->addChild(new TriangleFanCase	(m_context, "triangle_fan",		"Render primitives as GL_TRIANGLE_FAN, verify rasterization result"));
		primitives->addChild(new LinesCase			(m_context, "lines",			"Render primitives as GL_LINES, verify rasterization result",							PRIMITIVEWIDENESS_NARROW));
		primitives->addChild(new LineStripCase		(m_context, "line_strip",		"Render primitives as GL_LINE_STRIP, verify rasterization result",						PRIMITIVEWIDENESS_NARROW));
		primitives->addChild(new LineLoopCase		(m_context, "line_loop",		"Render primitives as GL_LINE_LOOP, verify rasterization result",						PRIMITIVEWIDENESS_NARROW));
		primitives->addChild(new LinesCase			(m_context, "lines_wide",		"Render primitives as GL_LINES with wide lines, verify rasterization result",			PRIMITIVEWIDENESS_WIDE));
		primitives->addChild(new LineStripCase		(m_context, "line_strip_wide",	"Render primitives as GL_LINE_STRIP with wide lines, verify rasterization result",		PRIMITIVEWIDENESS_WIDE));
		primitives->addChild(new LineLoopCase		(m_context, "line_loop_wide",	"Render primitives as GL_LINE_LOOP with wide lines, verify rasterization result",		PRIMITIVEWIDENESS_WIDE));
		primitives->addChild(new PointCase			(m_context, "points",			"Render primitives as GL_POINTS, verify rasterization result",							PRIMITIVEWIDENESS_WIDE));
	}

	// .fill_rules
	{
		tcu::TestCaseGroup* const fillRules = new tcu::TestCaseGroup(m_testCtx, "fill_rules", "Primitive fill rules");

		addChild(fillRules);

		fillRules->addChild(new FillRuleCase(m_context,	"basic_quad",			"Verify fill rules",	FillRuleCase::FILLRULECASE_BASIC));
		fillRules->addChild(new FillRuleCase(m_context,	"basic_quad_reverse",	"Verify fill rules",	FillRuleCase::FILLRULECASE_REVERSED));
		fillRules->addChild(new FillRuleCase(m_context,	"clipped_full",			"Verify fill rules",	FillRuleCase::FILLRULECASE_CLIPPED_FULL));
		fillRules->addChild(new FillRuleCase(m_context,	"clipped_partly",		"Verify fill rules",	FillRuleCase::FILLRULECASE_CLIPPED_PARTIAL));
		fillRules->addChild(new FillRuleCase(m_context,	"projected",			"Verify fill rules",	FillRuleCase::FILLRULECASE_PROJECTED));
	}

	// .culling
	{
		static const struct CullMode
		{
			glw::GLenum	mode;
			const char*	prefix;
		} cullModes[] =
		{
			{ GL_FRONT,				"front_"	},
			{ GL_BACK,				"back_"		},
			{ GL_FRONT_AND_BACK,	"both_"		},
		};
		static const struct PrimitiveType
		{
			glw::GLenum	type;
			const char*	name;
		} primitiveTypes[] =
		{
			{ GL_TRIANGLES,			"triangles"			},
			{ GL_TRIANGLE_STRIP,	"triangle_strip"	},
			{ GL_TRIANGLE_FAN,		"triangle_fan"		},
		};
		static const struct FrontFaceOrder
		{
			glw::GLenum	mode;
			const char*	postfix;
		} frontOrders[] =
		{
			{ GL_CCW,	""			},
			{ GL_CW,	"_reverse"	},
		};

		tcu::TestCaseGroup* const culling = new tcu::TestCaseGroup(m_testCtx, "culling", "Culling");

		addChild(culling);

		for (int cullModeNdx   = 0; cullModeNdx   < DE_LENGTH_OF_ARRAY(cullModes);      ++cullModeNdx)
		for (int primitiveNdx  = 0; primitiveNdx  < DE_LENGTH_OF_ARRAY(primitiveTypes); ++primitiveNdx)
		for (int frontOrderNdx = 0; frontOrderNdx < DE_LENGTH_OF_ARRAY(frontOrders);    ++frontOrderNdx)
		{
			const std::string name = std::string(cullModes[cullModeNdx].prefix) + primitiveTypes[primitiveNdx].name + frontOrders[frontOrderNdx].postfix;

			culling->addChild(new CullingTest(m_context, name.c_str(), "Test primitive culling.", cullModes[cullModeNdx].mode, primitiveTypes[primitiveNdx].type, frontOrders[frontOrderNdx].mode));
		}
	}

	// .interpolation
	{
		tcu::TestCaseGroup* const interpolation = new tcu::TestCaseGroup(m_testCtx, "interpolation", "Test interpolation");

		addChild(interpolation);

		// .basic
		{
			tcu::TestCaseGroup* const basic = new tcu::TestCaseGroup(m_testCtx, "basic", "Non-projective interpolation");

			interpolation->addChild(basic);

			basic->addChild(new TriangleInterpolationTest		(m_context, "triangles",		"Verify triangle interpolation",		GL_TRIANGLES,		INTERPOLATIONFLAGS_NONE));
			basic->addChild(new TriangleInterpolationTest		(m_context, "triangle_strip",	"Verify triangle strip interpolation",	GL_TRIANGLE_STRIP,	INTERPOLATIONFLAGS_NONE));
			basic->addChild(new TriangleInterpolationTest		(m_context, "triangle_fan",		"Verify triangle fan interpolation",	GL_TRIANGLE_FAN,	INTERPOLATIONFLAGS_NONE));
			basic->addChild(new LineInterpolationTest			(m_context, "lines",			"Verify line interpolation",			GL_LINES,			INTERPOLATIONFLAGS_NONE,	PRIMITIVEWIDENESS_NARROW));
			basic->addChild(new LineInterpolationTest			(m_context, "line_strip",		"Verify line strip interpolation",		GL_LINE_STRIP,		INTERPOLATIONFLAGS_NONE,	PRIMITIVEWIDENESS_NARROW));
			basic->addChild(new LineInterpolationTest			(m_context, "line_loop",		"Verify line loop interpolation",		GL_LINE_LOOP,		INTERPOLATIONFLAGS_NONE,	PRIMITIVEWIDENESS_NARROW));
			basic->addChild(new LineInterpolationTest			(m_context, "lines_wide",		"Verify wide line interpolation",		GL_LINES,			INTERPOLATIONFLAGS_NONE,	PRIMITIVEWIDENESS_WIDE));
			basic->addChild(new LineInterpolationTest			(m_context, "line_strip_wide",	"Verify wide line strip interpolation",	GL_LINE_STRIP,		INTERPOLATIONFLAGS_NONE,	PRIMITIVEWIDENESS_WIDE));
			basic->addChild(new LineInterpolationTest			(m_context, "line_loop_wide",	"Verify wide line loop interpolation",	GL_LINE_LOOP,		INTERPOLATIONFLAGS_NONE,	PRIMITIVEWIDENESS_WIDE));
		}

		// .projected
		{
			tcu::TestCaseGroup* const projected = new tcu::TestCaseGroup(m_testCtx, "projected", "Projective interpolation");

			interpolation->addChild(projected);

			projected->addChild(new TriangleInterpolationTest	(m_context, "triangles",		"Verify triangle interpolation",		GL_TRIANGLES,		INTERPOLATIONFLAGS_PROJECTED));
			projected->addChild(new TriangleInterpolationTest	(m_context, "triangle_strip",	"Verify triangle strip interpolation",	GL_TRIANGLE_STRIP,	INTERPOLATIONFLAGS_PROJECTED));
			projected->addChild(new TriangleInterpolationTest	(m_context, "triangle_fan",		"Verify triangle fan interpolation",	GL_TRIANGLE_FAN,	INTERPOLATIONFLAGS_PROJECTED));
			projected->addChild(new LineInterpolationTest		(m_context, "lines",			"Verify line interpolation",			GL_LINES,			INTERPOLATIONFLAGS_PROJECTED,	PRIMITIVEWIDENESS_NARROW));
			projected->addChild(new LineInterpolationTest		(m_context, "line_strip",		"Verify line strip interpolation",		GL_LINE_STRIP,		INTERPOLATIONFLAGS_PROJECTED,	PRIMITIVEWIDENESS_NARROW));
			projected->addChild(new LineInterpolationTest		(m_context, "line_loop",		"Verify line loop interpolation",		GL_LINE_LOOP,		INTERPOLATIONFLAGS_PROJECTED,	PRIMITIVEWIDENESS_NARROW));
			projected->addChild(new LineInterpolationTest		(m_context, "lines_wide",		"Verify wide line interpolation",		GL_LINES,			INTERPOLATIONFLAGS_PROJECTED,	PRIMITIVEWIDENESS_WIDE));
			projected->addChild(new LineInterpolationTest		(m_context, "line_strip_wide",	"Verify wide line strip interpolation",	GL_LINE_STRIP,		INTERPOLATIONFLAGS_PROJECTED,	PRIMITIVEWIDENESS_WIDE));
			projected->addChild(new LineInterpolationTest		(m_context, "line_loop_wide",	"Verify wide line loop interpolation",	GL_LINE_LOOP,		INTERPOLATIONFLAGS_PROJECTED,	PRIMITIVEWIDENESS_WIDE));
		}
	}

	// .flatshading
	{
		tcu::TestCaseGroup* const flatshading = new tcu::TestCaseGroup(m_testCtx, "flatshading", "Test flatshading");

		addChild(flatshading);

		flatshading->addChild(new TriangleInterpolationTest		(m_context, "triangles",		"Verify triangle flatshading",			GL_TRIANGLES,		INTERPOLATIONFLAGS_FLATSHADE));
		flatshading->addChild(new TriangleInterpolationTest		(m_context, "triangle_strip",	"Verify triangle strip flatshading",	GL_TRIANGLE_STRIP,	INTERPOLATIONFLAGS_FLATSHADE));
		flatshading->addChild(new TriangleInterpolationTest		(m_context, "triangle_fan",		"Verify triangle fan flatshading",		GL_TRIANGLE_FAN,	INTERPOLATIONFLAGS_FLATSHADE));
		flatshading->addChild(new LineInterpolationTest			(m_context, "lines",			"Verify line flatshading",				GL_LINES,			INTERPOLATIONFLAGS_FLATSHADE,	PRIMITIVEWIDENESS_NARROW));
		flatshading->addChild(new LineInterpolationTest			(m_context, "line_strip",		"Verify line strip flatshading",		GL_LINE_STRIP,		INTERPOLATIONFLAGS_FLATSHADE,	PRIMITIVEWIDENESS_NARROW));
		flatshading->addChild(new LineInterpolationTest			(m_context, "line_loop",		"Verify line loop flatshading",			GL_LINE_LOOP,		INTERPOLATIONFLAGS_FLATSHADE,	PRIMITIVEWIDENESS_NARROW));
		flatshading->addChild(new LineInterpolationTest			(m_context, "lines_wide",		"Verify wide line flatshading",			GL_LINES,			INTERPOLATIONFLAGS_FLATSHADE,	PRIMITIVEWIDENESS_WIDE));
		flatshading->addChild(new LineInterpolationTest			(m_context, "line_strip_wide",	"Verify wide line strip flatshading",	GL_LINE_STRIP,		INTERPOLATIONFLAGS_FLATSHADE,	PRIMITIVEWIDENESS_WIDE));
		flatshading->addChild(new LineInterpolationTest			(m_context, "line_loop_wide",	"Verify wide line loop flatshading",	GL_LINE_LOOP,		INTERPOLATIONFLAGS_FLATSHADE,	PRIMITIVEWIDENESS_WIDE));
	}

	// .fbo
	{
		static const struct
		{
			const char*						name;
			BaseRenderingCase::RenderTarget	target;
			int								numSamples;
		} renderTargets[] =
		{
			{ "texture_2d",				BaseRenderingCase::RENDERTARGET_TEXTURE_2D,			-1									},
			{ "rbo_singlesample",		BaseRenderingCase::RENDERTARGET_RBO_SINGLESAMPLE,	-1									},
			{ "rbo_multisample_4",		BaseRenderingCase::RENDERTARGET_RBO_MULTISAMPLE,	4									},
			{ "rbo_multisample_max",	BaseRenderingCase::RENDERTARGET_RBO_MULTISAMPLE,	BaseRenderingCase::SAMPLE_COUNT_MAX	},
		};

		tcu::TestCaseGroup* const fboGroup = new tcu::TestCaseGroup(m_testCtx, "fbo", "Test using framebuffer objects");
		addChild(fboGroup);

		// .texture_2d
		// .rbo_singlesample
		// .rbo_multisample_4
		// .rbo_multisample_max
		for (int targetNdx = 0; targetNdx < DE_LENGTH_OF_ARRAY(renderTargets); ++targetNdx)
		{
			tcu::TestCaseGroup* const colorAttachmentGroup = new tcu::TestCaseGroup(m_testCtx, renderTargets[targetNdx].name, ("Test using " + std::string(renderTargets[targetNdx].name) + " color attachment").c_str());
			fboGroup->addChild(colorAttachmentGroup);

			// .primitives
			{
				tcu::TestCaseGroup* const primitiveGroup = new tcu::TestCaseGroup(m_testCtx, "primitives", "Primitive rasterization");
				colorAttachmentGroup->addChild(primitiveGroup);

				primitiveGroup->addChild(new TrianglesCase	(m_context, "triangles",	"Render primitives as GL_TRIANGLES, verify rasterization result",											renderTargets[targetNdx].target, renderTargets[targetNdx].numSamples));
				primitiveGroup->addChild(new LinesCase		(m_context, "lines",		"Render primitives as GL_LINES, verify rasterization result",					PRIMITIVEWIDENESS_NARROW,	renderTargets[targetNdx].target, renderTargets[targetNdx].numSamples));
				primitiveGroup->addChild(new LinesCase		(m_context, "lines_wide",	"Render primitives as GL_LINES with wide lines, verify rasterization result",	PRIMITIVEWIDENESS_WIDE,		renderTargets[targetNdx].target, renderTargets[targetNdx].numSamples));
				primitiveGroup->addChild(new PointCase		(m_context, "points",		"Render primitives as GL_POINTS, verify rasterization result",					PRIMITIVEWIDENESS_WIDE,		renderTargets[targetNdx].target, renderTargets[targetNdx].numSamples));
			}

			// .fill_rules
			{
				tcu::TestCaseGroup* const fillRules = new tcu::TestCaseGroup(m_testCtx, "fill_rules", "Primitive fill rules");

				colorAttachmentGroup->addChild(fillRules);

				fillRules->addChild(new FillRuleCase(m_context,	"basic_quad",			"Verify fill rules",	FillRuleCase::FILLRULECASE_BASIC,			renderTargets[targetNdx].target, renderTargets[targetNdx].numSamples));
				fillRules->addChild(new FillRuleCase(m_context,	"basic_quad_reverse",	"Verify fill rules",	FillRuleCase::FILLRULECASE_REVERSED,		renderTargets[targetNdx].target, renderTargets[targetNdx].numSamples));
				fillRules->addChild(new FillRuleCase(m_context,	"clipped_full",			"Verify fill rules",	FillRuleCase::FILLRULECASE_CLIPPED_FULL,	renderTargets[targetNdx].target, renderTargets[targetNdx].numSamples));
				fillRules->addChild(new FillRuleCase(m_context,	"clipped_partly",		"Verify fill rules",	FillRuleCase::FILLRULECASE_CLIPPED_PARTIAL,	renderTargets[targetNdx].target, renderTargets[targetNdx].numSamples));
				fillRules->addChild(new FillRuleCase(m_context,	"projected",			"Verify fill rules",	FillRuleCase::FILLRULECASE_PROJECTED,		renderTargets[targetNdx].target, renderTargets[targetNdx].numSamples));
			}

			// .interpolation
			{
				tcu::TestCaseGroup* const interpolation = new tcu::TestCaseGroup(m_testCtx, "interpolation", "Non-projective interpolation");

				colorAttachmentGroup->addChild(interpolation);

				interpolation->addChild(new TriangleInterpolationTest		(m_context, "triangles",		"Verify triangle interpolation",		GL_TRIANGLES,		INTERPOLATIONFLAGS_NONE,								renderTargets[targetNdx].target, renderTargets[targetNdx].numSamples));
				interpolation->addChild(new LineInterpolationTest			(m_context, "lines",			"Verify line interpolation",			GL_LINES,			INTERPOLATIONFLAGS_NONE,	PRIMITIVEWIDENESS_NARROW,	renderTargets[targetNdx].target, renderTargets[targetNdx].numSamples));
				interpolation->addChild(new LineInterpolationTest			(m_context, "lines_wide",		"Verify wide line interpolation",		GL_LINES,			INTERPOLATIONFLAGS_NONE,	PRIMITIVEWIDENESS_WIDE,		renderTargets[targetNdx].target, renderTargets[targetNdx].numSamples));
			}
		}
	}
}

} // Functional
} // gles3
} // deqp